New Jersey §401(k), §403(b), and §457 Basis in 2026: The Split-Mirror State Treatment That Shapes Public-Sector vs Private-Sector Retirement Math

The 50-state retirement income taxation field guide we published on July 15, the Pennsylvania §401(k) after-tax basis deep-dive from July 17, and the California §401(k) and IRA basis analysis from July 20 together define the two poles of state-level treatment of §401(k) elective deferrals: Pennsylvania at the contribution-point-taxation pole, California at the federal-conforming-across-the-board pole. New Jersey sits in a category of its own — a split-mirror state where the plan-code identity of the account, not the state of residence, controls the answer. A NJ private-sector employee deferring into a §401(k) at their employer receives federal-conforming exclusion under N.J.S.A. 54A:6-21; a NJ public-sector employee deferring the same dollar of salary into a §403(b) at a public university, a §457(b) at a state agency, or as a §414(h) pickup contribution to PERS or TPAF pays NJ tax on that dollar in the year it is deferred, building NJ basis in every one of those accounts.

This asymmetric treatment matters more for NJ than for most states because the state has both an unusually large public-sector workforce (approximately 700,000 state, county, municipal, and public-school employees participating in PERS, TPAF, PFRS, and related systems) and one of the highest state marginal rates in the country at the top of the income distribution — 10.75 percent above $1 million and 8.97 percent between $500,000 and $1 million under N.J.S.A. 54A:2-1.^[1] The NJ basis a public-sector worker accumulates in a §403(b), a §457, and a §414(h) pickup contribution over a 30-year career can easily total $200,000 to $400,000 — real dollars that are recoverable tax-free from NJ if the participant elects the correct cost-recovery method at distribution and preserves the pension exclusion strategy the N.J.S.A. 54A:6-15 statute makes available.

This guide walks the whole picture: the N.J.S.A. 54A:6-21 statute that puts §401(k) inside the federal-conforming perimeter; the N.J.A.C. 18:35-2.5 regulation that keeps §403(b), §457, §414(h), SEP, SIMPLE, SARSEP, and IRA contributions outside it; the Three-Year Rule and General Rule cost-recovery mechanics under GIT-1 and GIT-2; the N.J.S.A. 54A:6-15 pension exclusion with its $150,000 gross-income cliff and $75K/$100K/$50K maximum exclusion tiers; the special treatment of §414(h) pickup contributions to PERS, TPAF, and PFRS; the cross-border relocation math under the Pension Source Tax Act of 1996; the SECURE 2.0 §603 mandatory Roth catch-up interaction; the Roth conversion mechanic for public-sector participants with NJ basis to recover; three worked case studies at Elena $180K Newark private-sector 401(k), Marcus $145K Trenton state employee 403(b)+457+414(h) stack, and Priya $520K Princeton→Naples-FL late-career relocator; six mistakes to avoid; an 8-item action checklist; and 10 FAQ questions.

Model the base §401(k) mechanics using the 401(k) calculator, the NJ marginal-rate stacking using the income tax calculator, the retirement drawdown modeling using the retirement calculator, and the Roth conversion timing using the Roth conversion calculator.

1. Why NJ is the split-mirror state — N.J.S.A. 54A:6-21 and N.J.A.C. 18:35-2.5

New Jersey's gross income tax was enacted in 1976 through Chapter 47 of P.L. 1976, codified as the New Jersey Gross Income Tax Act at N.J.S.A. 54A:1-1 et seq. The act defines gross income at N.J.S.A. 54A:5-1 as fifteen enumerated categories of receipts, of which the first — "salaries, wages, tips, fees, commissions, bonuses, and other remuneration received for services rendered" — is the operative category for retirement-plan contribution treatment. Unlike the Internal Revenue Code, which builds a general exclusion for elective deferrals into qualified plans under §401(k), §403(b), §457, §408(k), and §408(p), the NJ statute contains no general retirement-plan exclusion. Every exclusion NJ recognizes must be explicitly written into the statute.

Section 2 of P.L. 1983, c. 571, effective for contributions made on or after January 1, 1984 and codified at N.J.S.A. 54A:6-21, is the single explicit statutory carve-out for §401(k). It provides that gross income shall not include amounts contributed by an employer on behalf of and at the election of an employee to a trust which is part of a qualified cash-or-deferred arrangement meeting the requirements of IRC §401(k), to the extent the elective deferral does not exceed the federal §402(g)(1) limit ($24,500 for 2026 per IRS Notice 2025-67).^[2] Amounts above the federal limit are NJ-includible. The 1983 legislation was enacted specifically to align NJ treatment of the then-new §401(k) plans with federal treatment; no comparable amendment has since been enacted for §403(b), §457, or any other elective-deferral plan.

The regulatory implementation at N.J.A.C. 18:35-2.5 (Pensions and Annuities), promulgated by the NJ Division of Taxation, makes the split explicit: an employee may defer NJ tax on both employee and employer contributions to IRC §401(k) plans; but employee contributions to any other retirement plan — expressly including plans under IRC §403(b), §457, §414(h), SEP, SARSEP, SIMPLE, Federal Thrift Savings Fund, and Individual Retirement Accounts — must be included in NJ gross income at the contribution point.^[3] Employer contributions to §403(b), §457, and §414(h) plans generally receive tax-deferred treatment at contribution; but employer contributions to SIMPLE, SEP, and SARSEP plans are also NJ-taxable at contribution — a separate asymmetry that catches many small-business owners who rely on SEP or SIMPLE plans for retirement savings.

2. What NJ basis actually is — and how it accumulates

NJ basis in a §403(b), §457, §414(h), SEP, SIMPLE, or IRA account equals the cumulative sum of employee contributions made to that account while the participant was a NJ resident, measured at the pre-deferral wage. Each dollar contributed has already been NJ-taxed at the participant's then-current NJ marginal rate. Because NJ has already collected on the contribution, the same dollar is recoverable tax-free at distribution under either the Three-Year Rule under N.J.S.A. 54A:6-10 or the General Rule under IRC §72 as cross-referenced by NJ for plans that do not qualify for Three-Year treatment.

The NJ basis calculation excludes the employer portion of the account. N.J.A.C. 18:35-2.5 treats employer contributions to §403(b), §457, and §414(h) as tax-deferred at contribution (as noted above, SIMPLE/SEP/SARSEP employer contributions are an exception). Because those employer contributions were not NJ-taxed at contribution, they build no NJ basis. On distribution, the participant must apportion the total account balance between the NJ-basis portion (employee contributions from NJ-resident years) and the NJ-non-basis portion (employer contributions plus investment earnings on both employee and employer portions).

Recordkeepers do not track NJ basis because it is not a federal concept and no federal reporting form captures it. Vanguard, Fidelity, TIAA, and the recordkeepers that administer NJ public-sector §403(b) and §457 plans (Voya, Prudential, Empower, MassMutual) all track federal after-tax basis under IRS §72 for pretax vs after-tax voluntary contribution separation — but they do not track the separate NJ contribution-point basis that N.J.A.C. 18:35-2.5 creates. The participant bears the record-keeping burden.

The W-2 mechanic for NJ residents deferring into a §401(k) is exactly parallel to the federal mechanic: Box 1 federal wages equal Box 16 NJ wages, both after the §401(k) exclusion under §54A:6-21. The W-2 mechanic for NJ residents deferring into a §403(b), §457, or §414(h) diverges: Box 1 federal wages are computed after the federal elective-deferral exclusion, but Box 16 NJ wages are computed before that exclusion. Box 16 minus Box 1 for a NJ public-sector worker typically equals the annual NJ basis addition for that year. Track this delta year-by-year; it is the single most-load-bearing input to the eventual basis calculation at distribution.

3. Three-Year Rule vs General Rule — the cost-recovery election at distribution

New Jersey provides two methods for recovering the NJ basis in a pension or annuity at distribution: the Three-Year Rule under N.J.S.A. 54A:6-10 and the General Rule (based on the federal IRC §72 mechanic) as implemented through NJ Division of Taxation Tax Topic Bulletin GIT-1 (Pensions and Annuities).^[4] The Three-Year Rule is generally more favorable when it applies because it front-loads the entire basis recovery into the first three years of payments; the General Rule spreads the basis recovery pro-rata across the participant's expected lifetime, so a smaller fraction of each payment is treated as basis recovery.

The Three-Year Rule applies if the participant will receive an amount equal to or greater than the total NJ basis within 36 months from the date of the first payment. Under the rule, no portion of a payment is reported as NJ-taxable income until cumulative payments equal cumulative NJ basis. Once the basis is fully recovered, all subsequent payments are 100 percent NJ-taxable. For a participant with $180,000 of NJ basis in a §403(b) receiving $60,000-per-year distributions, the Three-Year Rule permits the first three years of payments to be fully NJ-excluded ($60K × 3 = $180K), with year 4 and onward fully NJ-taxable.

The General Rule uses a fixed exclusion ratio computed at commencement: NJ basis divided by expected total payments over the participant's remaining life expectancy per IRS Publication 939 tables. Each subsequent payment is treated as partially basis recovery (excluded from NJ tax) and partially income (NJ-taxable). For the same participant with $180,000 of NJ basis and an expected 20-year payment horizon totaling $1,200,000 of expected payments ($60K × 20), the exclusion ratio is 15 percent. Every $60,000 annual payment is treated as $9,000 basis recovery (NJ-excluded) and $51,000 income (NJ-taxable).

The Three-Year Rule is almost always better for participants who plan to take large distributions in their first three retirement years — either through a lump sum, a large partial withdrawal, or a scheduled §457-plan draw that front-loads payments. Public-sector workers with §457(b) plans have particular flexibility here because §457(b) distribution rules are more permissive than §401(k) rules; the plan can pay out on a schedule that specifically ensures the Three-Year Rule applies. For a NJ resident approaching a cross-border relocation, the Three-Year Rule is also strategically valuable because it allows the participant to recover the full NJ basis before establishing bona fide domicile in the destination state — after which the Pension Source Tax Act would block NJ from taxing the distributions anyway, but the destination state might apply its own tax to the full distribution without recognizing the NJ basis.

4. The N.J.S.A. 54A:6-15 pension exclusion — 2026 amounts and the $150K cliff

New Jersey's pension exclusion at N.J.S.A. 54A:6-15 permits a resident age 62 or older, or disabled per federal Social Security standards, to exclude from NJ gross income tax up to $100,000 (married filing jointly), $75,000 (single or head of household), or $50,000 (married filing separately) of pension, annuity, and IRA distribution income for 2026. The exclusion applies to the taxable portion of qualified plan distributions after the Three-Year Rule or General Rule basis recovery reduces the gross distribution to its taxable amount.^[5]

The exclusion is subject to a hard $150,000 gross-income cliff and two intermediate tiers. If NJ gross income is $100,000 or less, the full exclusion is available. Between $100,001 and $125,000, the maximum exclusion drops to 50 percent of the base ($50K MFJ / $37.5K single / $25K MFS). Between $125,001 and $150,000, the maximum exclusion drops to 25 percent of the base ($25K MFJ / $18.75K single / $12.5K MFS). Above $150,000, the exclusion is zero — a full cliff, not a phaseout.

Because Social Security benefits are fully excluded from NJ gross income under N.J.S.A. 54A:6-2, Social Security income does not consume any of the pension exclusion cap and does not count toward the $150,000 gross-income cliff.^[6] This creates a real planning opportunity: a NJ retired couple drawing $50,000 of Social Security and $80,000 of §403(b) distributions has $80,000 of NJ gross income (Social Security excluded), qualifies for the full $100,000 MFJ pension exclusion, and pays zero NJ tax on the $80,000 §403(b) draw. The same couple drawing $30,000 of Social Security and $130,000 of §403(b) distributions has $130,000 of NJ gross income, qualifies only for the reduced $50,000 exclusion, and pays NJ tax on the remaining $80,000 of §403(b) draw at the 6.37 percent NJ marginal rate.

The gross-income cliff creates a strong incentive for NJ retirees to structure distributions to fall just below the $100K and $150K thresholds. A couple projecting $155,000 of gross income has zero pension exclusion; the same couple structuring distributions to $148,000 recovers 25 percent of the base exclusion ($25K MFJ) — meaningful in dollar terms. Roth conversions, taxable investment sales, and part-time consulting income should be evaluated in this framework, because each dollar of pre-cliff income that pushes the couple over $150,000 costs both the marginal-rate tax on that dollar AND the loss of the exclusion on all other retirement income.

5. The public-sector stack — 414(h) pickup + §403(b) + §457 for NJ state workers

A NJ state, county, or municipal worker participating in PERS, TPAF, or PFRS typically has three layers of retirement contribution flowing out of their W-2 each pay period. The first is the mandatory §414(h) pickup contribution to their defined-benefit pension system — 7.5 percent of salary for PERS Tier 5+ members, similar percentages for TPAF and PFRS. Under IRC §414(h)(2), these employee contributions are "picked up" by the employer and treated as employer contributions for federal purposes, which excludes them from federal Box 1 wages. NJ does not conform; N.J.A.C. 18:35-2.5 requires them to be included in NJ Box 16 wages. The Box 14 code "414H" on a NJ public-sector W-2 flags the amount of NJ-taxable pickup contribution for the year.^[7]

The second layer is a voluntary §403(b) elective deferral, typically to a Voya, TIAA, or Empower plan sponsored by the county school district, state college, or hospital system. The 2026 §402(g)(1) elective deferral limit of $24,500 applies; the §414(v) age-50 catch-up of $8,000 and the §414(v)(2)(E)(i) age-60-63 super catch-up of $11,250 stack on top. All of these are NJ-taxable at contribution under N.J.A.C. 18:35-2.5. The employer's §403(b) match, if any, is NJ tax-deferred at contribution.

The third layer is a voluntary §457(b) elective deferral to the NJ State Employees Deferred Compensation Plan (NJSEDCP) or the equivalent county-plan sponsored by the participant's specific employer. Under IRC §457(b)(2) and §457(e)(15), the 2026 elective deferral limit is $24,500 — independent of the §403(b) limit, so a public-sector worker can stack $24,500 into both plans for a combined $49,000 elective deferral capacity that has no analog in the private sector.^[8] The §457(b)(3) special catch-up rule permits a participant within three years of normal retirement age to defer up to twice the annual limit — up to $49,000 per year for those three years — which can dramatically compress late-career catch-up. All of these are NJ-taxable at contribution.

For a mid-career NJ state worker earning $110,000 and maxing all three sources — $8,250 pickup + $24,500 §403(b) + $24,500 §457(b) = $57,250 of retirement contributions — the annual NJ basis addition is $57,250. Over a 25-year career, the cumulative NJ basis in the three accounts totals approximately $1,431,250 in nominal terms. The NJ tax paid at contribution across those 25 years, assuming 6.37 percent NJ marginal rate throughout, totals approximately $91,171. That $91,171 is real NJ tax paid at the contribution point — a state-tax cost a same-earner Ohio, California, or New York public-sector worker would have deferred entirely to distribution. In exchange, the NJ participant has $1,431,250 of NJ basis recoverable tax-free at retirement.

6. Cross-border relocation — the two directions

Direction 1: NJ resident retiring to a lower-tax or zero-tax state

The Pension Source Tax Act of 1996, Public Law 104-95 codified at 4 U.S.C. §114, prohibits any state from imposing income tax on periodic-payment retirement distributions paid to a former resident.^[9] The Act covers qualified plans under §401(a), §403(a), §403(b), §408 IRAs, §408A Roth IRAs, §457(b) plans, and §414(d) government plans, plus certain §3121(v)(2)(C) nonqualified plans. For a NJ resident who establishes bona fide domicile in Florida, Texas, or any no-income-tax state, NJ cannot follow the money on any of the qualified-plan or IRA distributions covered by the Act.

The practical consequence for a NJ public-sector retiree with substantial NJ basis is that the basis is functionally lost at relocation. The destination state's own tax treatment now controls the distribution. Florida, being a zero-income-tax state, taxes nothing regardless of basis — so the loss of NJ basis is not a net cost, and the relocation is unambiguously favorable on state-tax grounds. But a NJ-to-Delaware relocator or a NJ-to-North Carolina relocator faces a different math: the destination state taxes the full distribution without recognizing the NJ basis. In that case, the NJ basis is effectively taxed twice (once by NJ at contribution, once by the destination state at distribution) — a real double-taxation trap that only becomes visible in the specific fact pattern of relocation to an income-tax state that does not exempt qualified plan distributions.

The pre-relocation Three-Year Rule accelerated drawdown is the classic response. If the NJ resident recovers their full NJ basis via a Three-Year Rule schedule in the last three years of NJ residency, they enter the destination state with a zero-basis account and pay the destination state's tax on the remaining balance without any state-tax cost associated with the recovery of the pre-taxed contributions. The Roth conversion calculator can model an alternative: convert the pre-relocation portion to Roth during the final NJ-resident years, incurring NJ tax on the untaxed earnings portion but eliminating any future state-tax exposure on the full account.

Direction 2: Out-of-state worker moving into NJ at or near retirement

A participant who accumulated §403(b) or §457 balances while a resident of another state faces a different question when moving into NJ near retirement. The contributions made while a non-NJ-resident were not NJ-taxed, so the participant has zero NJ basis in those balances. Under N.J.S.A. 54A:6-15, retirement-age distributions still qualify for the pension exclusion (age 62+, gross income ≤ $150K, up to $100K MFJ / $75K single / $50K MFS), but the exclusion is applied against the full taxable distribution — the participant has no basis-recovery cushion below the exclusion.

For a $220,000 §403(b) balance built entirely from Ohio-resident contributions, a NJ-resident retiree drawing $60,000 per year has zero NJ basis, so the full $60,000 is NJ-taxable gross income. Assuming other NJ gross income (Social Security excluded, other income modest) keeps the couple under $100K MFJ, the full $60,000 is absorbed by the pension exclusion — zero NJ tax. But if other income pushes the couple above $150K MFJ, the exclusion is zero and the full $60,000 is NJ-taxable at 5.525 percent to 6.37 percent depending on the taxable-income bracket. The out-of-state-to-NJ retiree therefore does not benefit from any pre-retirement contribution-point tax but does still enjoy the pension exclusion at retirement — a meaningful state-tax outcome that partially offsets the loss of the accumulated-basis cushion.

7. Interaction with SECURE 2.0 §603 mandatory Roth catch-up

SECURE 2.0 §603, codified at IRC §414(v)(7), mandates that catch-up contributions of participants above the $150,000 prior-year FICA wage threshold (for 2026 per IRS Notice 2025-67) be Roth rather than pretax, effective January 1, 2026 after the two-year administrative-transition relief under IRS Notice 2023-62 expired December 31, 2025. The mandate applies to §401(k), §403(b), and governmental §457(b) catch-up contributions, but not to tax-exempt §457(b) plans (which do not have §414(v) catch-up in the first place because §457(b) already permits three-year special catch-up under §457(b)(3)).^[10]

For a NJ §401(k) participant, §603 has a real state-tax cost. The pretax catch-up would have been NJ-excluded under N.J.S.A. 54A:6-21, and forcing it into Roth eliminates that state-tax deferral. On an $8,000 base catch-up at the 10.75 percent NJ top marginal rate, this represents up to $860 of additional NJ tax; on the $11,250 age 60-63 super catch-up at the same rate, up to $1,209. For a §603-covered NJ private-sector participant at the top marginal rate, the annual NJ cost of §603 is meaningful and should factor into the NQDC vs Roth-catch-up decision framework we published on July 16.

For a NJ §403(b) or §457 participant, §603 is state-tax-neutral in a way it is not for §401(k) participants. Because those catch-ups were already NJ-taxable at the contribution point regardless of Traditional or Roth character (both are NJ-includible compensation under N.J.A.C. 18:35-2.5), §603's forcing effect changes nothing about the NJ state-tax picture. A NJ public-sector §603-covered participant loses no state-tax deferral because there was no state-tax deferral to lose. This is one of the few cases where NJ's split-mirror treatment reduces the §603 impact for public-sector workers relative to private-sector workers — the exact opposite of the direction the split typically runs.

8. Roth conversion mechanics for NJ residents with basis

A Roth conversion from a Traditional §401(k) — where NJ basis is zero because the deferrals were NJ-excluded under §54A:6-21 — is fully NJ-taxable on the converted amount at ordinary NJ marginal rates. This is identical to the federal treatment because both the federal government and NJ are recovering deferred tax at conversion. For a NJ resident in the 6.37 percent bracket converting $100,000 from a Traditional §401(k), NJ tax due is $6,370 in addition to the federal tax due.

A Roth conversion from a §403(b), §457, SEP, SIMPLE, or Traditional IRA — all of which have NJ basis — is NJ-taxable only on the portion representing untaxed earnings. NJ has already collected on the basis portion, so the conversion of that portion is a NJ-tax-free event. The IRS Publication 590-A / 590-B pro-rata rule for federal basis recovery on IRA conversions applies in modified form for NJ purposes as well: NJ basis is spread across the total balance of the participant's IRA aggregate (or, for §403(b) and §457, across the specific plan account being converted). For a NJ resident converting $100,000 from a §403(b) where 60 percent of the account balance is NJ basis, only $40,000 of the conversion is NJ-taxable.

The compound effect of the Roth conversion pattern for NJ public-sector workers is significant. A retiree with $600,000 in a §403(b) of which $250,000 is NJ basis and $350,000 is untaxed earnings, converting the entire balance to Roth over three years at $200K per year, incurs federal tax on the full $600K but NJ tax on only $350K (approximately $22,300 at 6.37 percent NJ, vs $38,200 if the full $600K were NJ-taxable). The GIT-1 basis-recovery mechanic makes the Roth conversion strategy materially cheaper in NJ than a naive federal-only model would suggest.

9. Three case studies at $180K / $145K / $520K

Case 1: Elena, age 42, Newark, $180,000 private-sector engineer

Elena is a software engineer at a Newark-based fintech, salary $180,000, single. Her employer offers a §401(k) with 5 percent match on 100 percent of employee deferrals up to 5 percent of pay. Elena defers the full 2026 §402(g)(1) limit of $24,500 pretax, receives a $9,000 employer match, and has no other retirement plan contributions.

NJ treatment: Elena's $24,500 §401(k) deferral is fully NJ-excluded under N.J.S.A. 54A:6-21. Her Box 1 federal wages equal her Box 16 NJ wages, both at $155,500 after the deferral. Her $9,000 employer match is NJ-excluded at contribution as well. She builds zero NJ basis in her §401(k) — a full federal-conforming outcome. Her NJ marginal rate on the wages she does receive is 6.37 percent (single bracket between $75K and $500K). If she had instead worked at a NJ public university and deferred the same $24,500 into a §403(b), her Box 16 NJ wages would be $180,000 (before the deferral), her NJ contribution-point tax would be $1,560 higher (6.37% × $24,500), and she would build $24,500 of NJ basis in the §403(b).

Elena's Traditional-vs-Roth §401(k) decision reduces to the pure federal marginal-rate arbitrage. Her federal marginal rate is 24 percent; projected retirement federal marginal rate is 22 percent. The 2-percentage-point spread favors Traditional. On the NJ axis, both come out equivalent — pretax gets NJ contribution-point exclusion but distribution-point taxation; Roth gets NJ contribution-point taxation (as ordinary after-tax) but distribution-point exclusion under N.J.S.A. 54A:6-15 for qualified Roth distributions. At Elena's income level, the pension exclusion may or may not apply at retirement (depends on total gross income), so the NJ analysis has some uncertainty — but the federal analysis stands as the primary signal. Elena elects 80/20 Traditional/Roth for tax diversification, and models the projection in the 401(k) calculator.

Case 2: Marcus, age 55, Trenton, $145,000 state employee — the triple stack

Marcus is a NJ Department of Environmental Protection administrator, salary $145,000, married filing jointly with a spouse earning $65,000. He participates in PERS Tier 3 (7.5 percent §414(h) pickup contribution = $10,875/year), a voluntary NJ Higher Education 403(b) plan through a Voya recordkeeper ($24,500 elective deferral + $8,000 age-50 catch-up = $32,500/year), and the NJSEDCP §457(b) plan ($24,500 elective deferral + $8,000 age-50 catch-up = $32,500/year). Total 2026 retirement contribution: $75,875.

NJ treatment: All $75,875 is NJ-taxable at contribution under N.J.A.C. 18:35-2.5. Marcus's Box 1 federal wages are $145,000 − $65,000 (§403(b) + §457 elective deferrals plus catch-up) = $80,000. His Box 16 NJ wages are $145,000 − $0 = $145,000. Wait — that's incorrect. His Box 16 NJ wages equal his federal Box 1 wages plus back the §403(b) and §457 deferrals, plus back the §414(h) pickup — so Box 16 = $145,000, matching his gross salary. His NJ tax on the retirement contribution portion at his marginal rate (6.37 percent) is $4,833 for the year. Over a projected 12 remaining working years, cumulative NJ contribution-point tax is approximately $58,000. Cumulative NJ basis at retirement: approximately $910,500 across the three accounts.

At retirement, Marcus can elect the Three-Year Rule if he plans distributions large enough to recover the full $910,500 within 36 months. A structured lump-sum-plus-annuity design from the §457(b) plan can accomplish this. Alternatively, Marcus can elect the General Rule and pro-rate the basis recovery across his 20-year life expectancy — receiving approximately $45,525/year of NJ-exempt basis recovery on each year's distribution, with the remainder NJ-taxable.

The pension exclusion analysis: Marcus and his spouse project $80,000 of combined Social Security at 67 plus $105,000 of §403(b)/§457 draws plus $12,000 of taxable investment income. NJ gross income = $105,000 + $12,000 = $117,000 (Social Security excluded). At the $100,001–$125,000 tier, MFJ exclusion is $50,000. So $50,000 of the $105,000 §403(b)/§457 draw is pension-exclusion-excluded, and the remaining $55,000 is potentially NJ-taxable — unless the Three-Year Rule or General Rule basis-recovery already excludes part of it. This stacking of basis recovery ON TOP OF the pension exclusion is what makes NJ public-sector retirement math distinct — the two exclusions compound rather than compete.

Case 3: Priya, age 62, Princeton to Naples, FL — the pre-relocation Three-Year Rule window

Priya is a Princeton University professor, salary $220,000, retiring next year at 63 and relocating to Naples, Florida. She has accumulated a §403(b) balance of $840,000 through TIAA over her 28-year Princeton career, and a §457(b) balance of $320,000 through Fidelity via Princeton's tax-exempt §457(b) top-hat plan. Her NJ basis in the §403(b) totals approximately $525,000 (the sum of her employee elective deferrals over the career); her NJ basis in the §457(b) totals approximately $290,000. Combined NJ basis: $815,000. Combined account balance: $1,160,000. Untaxed earnings + employer contributions on top of basis: $345,000.

Priya's decision: does she accelerate distributions in her final NJ-resident year to recover the NJ basis before the Florida relocation? Or does she wait until she is a Florida resident to take distributions?

Option A: Accelerate. Priya elects the Three-Year Rule on her §403(b) and §457(b) commencing distributions in year 1 of retirement (still a NJ resident), takes $530,000 in year 1 across the two plans, then relocates to Florida for years 2 and 3, and completes the basis recovery from Florida. The full $815,000 NJ basis is recovered NJ-tax-free — but this requires taking massive front-loaded distributions that trigger federal ordinary-rate tax on the earnings portion (approximately $345,000 × 24 percent federal = $82,800 in year 1 alone).

Option B: Wait. Priya relocates to Florida first, then takes normal-scale distributions of $60,000/year from Florida. The Pension Source Tax Act blocks NJ from taxing the distributions. Florida taxes nothing. The NJ basis is never formally "recovered" but it is also never state-taxed against — the destination state's zero-tax rate makes the basis functionally irrelevant. Federal tax on the earnings portion is paid at ordinary rates in the year taken.

Option B wins under most modeling because Option A forces federal tax bunching that costs more than the NJ tax savings on the basis recovery. Priya's decision: wait. She relocates January 1 of her retirement year and takes normal distributions from Florida. Her $815,000 NJ basis is a sunk cost from the contribution-point tax paid over 28 years of NJ residence, but no incremental NJ tax cost is incurred at distribution. The Pension Source Tax Act protection is worth more than the pre-relocation Three-Year Rule recovery in this fact pattern because Florida's zero-tax rate makes the basis-recovery mechanic redundant.

The counter-example: if Priya were relocating to North Carolina (which taxes qualified plan distributions without a NJ-basis carryover), Option A would win — accelerating the basis recovery in NJ before the move would save the NC tax on that basis-recovered portion. The Roth conversion calculator and the retirement calculator model both options.

10. Six mistakes NJ residents make with §403(b) / §457 / §414(h) planning

Mistake 1: Assuming NJ treats 403(b) and 401(k) the same way. The most common error, made by both participants and even some accountants. NJ has a single explicit statutory exclusion for §401(k) under N.J.S.A. 54A:6-21 and no comparable exclusion for §403(b), §457, or any other elective-deferral plan. A NJ public-school teacher deferring into a §403(b) is not receiving federal-conforming treatment even though their federal Box 1 wages look identical to a private-sector §401(k) participant at the same salary.

Track Box 16 NJ wages against Box 1 federal wages every year. If Box 16 exceeds Box 1 by the amount of your §403(b) or §457 deferral, NJ is correctly taxing the contribution at the deferral point — and you are correctly building NJ basis.

Mistake 2: Defaulting to the General Rule without modeling the Three-Year Rule. The Three-Year Rule is almost always better when NJ basis is 15 percent or more of the total account balance, especially for §457(b) participants who can structure distributions to front-load the basis recovery within 36 months. NJ Division of Taxation publications describe both methods neutrally, but participants who default to General Rule without modeling both leave real NJ tax dollars on the table.

Mistake 3: Ignoring the $150K gross-income cliff on the pension exclusion. A retired couple pushing $155,000 of NJ gross income has zero pension exclusion; the same couple at $148,000 recovers 25 percent of the base exclusion. Structuring Roth conversions, taxable investment sales, and part-time consulting income to keep NJ gross income under the $100K, $125K, and $150K thresholds preserves meaningful exclusion. Model each year's gross-income projection in the income tax calculator before executing large discretionary transactions.

Mistake 4: Losing NJ basis at relocation to an income-tax destination state. The Pension Source Tax Act protects distributions from former-state taxation but does not obligate the destination state to recognize NJ basis. Relocations to Florida, Texas, Nevada, or other zero-tax states are unambiguous winners; relocations to Delaware, North Carolina, Maryland, or similar income-tax destinations require pre-relocation Three-Year Rule execution to avoid effective double-taxation of the NJ basis.

Mistake 5: Failing to track §414(h) pickup basis for PERS/TPAF/PFRS. Public-sector workers with mandatory §414(h) pickup contributions build meaningful NJ basis in their defined-benefit pension, but the pickup amounts flow through Box 14 rather than being reported on any consolidated statement. Sum the Box 14 "414H" amounts from every NJ-resident W-2 across your career; this is the NJ basis you can recover at retirement from your PERS, TPAF, or PFRS pension distributions via either the Three-Year Rule or General Rule.

Mistake 6: Executing a Traditional-to-Roth conversion on a §403(b) or §457 without accounting for the NJ basis reduction. A NJ resident converting $100,000 from a §403(b) where 60 percent is NJ basis owes NJ tax on only $40,000 of the conversion — not the full $100,000. Failing to apply the NJ basis reduction on Line 20b of Form NJ-1040 overstates NJ tax owed. Provide your NJ tax preparer with the basis calculation before signing the return.

11. Your 8-item NJ retirement-plan decision checklist

12. FAQ

Sources and methodology