Colorado Capital Gains Tax Calculator 2026

Calculate your combined federal + CO state capital gains tax on stocks, crypto, real estate, and other investments. Colorado taxes capital gains at rates up to 4.4%.

📊 Calculate Your Colorado Capital Gains Tax

Purchase Price ($)

Sale Price ($)

Filing Status

Holding Period

Other Taxable Income ($)

Investment Losses ($)

Capital Gain

—

Federal Tax

—

CO State Tax

—

NIIT (3.8%)

—

Total Tax

—

After-Tax Proceeds

—

Effective Fed Rate

—

Effective State Rate

—

Combined Effective Rate

—

📋 Colorado Capital Gains Tax Overview

4.4%

State CG Rate

4.4% flat

Rate Structure

20%

Max Federal Rate

3.8%

NIIT Surcharge

Flat 4.4% tax on all income including capital gains

How Capital Gains Tax Works in Colorado

When you sell an investment — stocks, bonds, cryptocurrency, real estate, or other assets — for more than you paid, the profit is a capital gain. In Colorado, capital gains are generally taxed as ordinary income at rates up to 4.4%, on top of federal capital gains tax.

Federal Capital Gains Tax Rates (2026)

0% rate: Single filers with taxable income up to $47,025 (MFJ: $94,050)
15% rate: Single filers $47,025–$518,900 (MFJ: $94,050–$583,750)
20% rate: Single filers above $518,900 (MFJ: above $583,750)
3.8% NIIT: Net Investment Income Tax applies to income above $200K (single) or $250K (MFJ)

Short-Term vs. Long-Term Capital Gains

Short-term gains (assets held less than 1 year) are taxed at your ordinary income tax rate — which can be as high as 37% federally plus 4.4% in Colorado. Long-term gains (assets held 1+ years) receive preferential federal rates of 0%, 15%, or 20%, but Colorado does not offer a preferential state rate — gains are taxed as ordinary income.

5 Strategies to Reduce Capital Gains Tax in Colorado

Hold investments for 1+ years — Long-term gains qualify for 0/15/20% federal rates instead of up to 37%
Tax-loss harvesting — Sell losing investments to offset gains (up to $3,000 excess losses deductible)
Use tax-advantaged accounts — 401(k), IRA, Roth IRA, HSA shield gains from taxation
Qualified Opportunity Zones — Defer and potentially reduce capital gains by investing in QOZ funds
Consider your timing — Sell in years when your income is lower to stay in a lower federal bracket

Colorado-Specific Capital Gains Rules

Flat 4.4% tax on all income including capital gains. Combined with federal rates, investors in Colorado could pay up to 28.2% on long-term gains or up to 45.2% on short-term gains. Tax planning is essential for Colorado residents with significant investment income.

❓ Frequently Asked Questions

What is the capital gains tax rate in Colorado?

Colorado taxes capital gains at rates up to 4.4%. Flat 4.4% tax on all income including capital gains. Combined with federal tax (0-20%) and the potential 3.8% NIIT, your total rate could reach 28.2%.

How do I calculate capital gains tax on stocks in Colorado?

Subtract your cost basis (purchase price + fees) from your sale price to determine your gain. If held over 1 year, apply federal long-term rates (0/15/20% based on income) plus Colorado's state rate (up to 4.4%). Our calculator above handles all of this automatically.

Does Colorado tax cryptocurrency capital gains?

Yes — cryptocurrency is treated as property by the IRS and by Colorado. Crypto gains are taxed the same as stocks or other investments — at your ordinary income tax rate for short-term gains or preferential federal rates for long-term gains, plus the Colorado state rate of up to 4.4%.

Is there a capital gains exclusion for home sales in Colorado?

Yes — the federal home sale exclusion allows you to exclude up to $250,000 in gains ($500,000 for married couples filing jointly) if you've lived in the home for at least 2 of the last 5 years. This exclusion applies to both federal and Colorado state taxes. Gains above the exclusion limit are taxed at your applicable rates.

What is the Net Investment Income Tax (NIIT)?

The NIIT is a 3.8% federal surtax on investment income (capital gains, dividends, interest, rental income) for individuals with modified AGI above $200,000 (single) or $250,000 (married filing jointly). It applies in all states, including Colorado.

How can I reduce my capital gains tax in Colorado?

Key strategies include: holding investments for over 1 year (lower federal rate), tax-loss harvesting (offsetting gains with losses), using tax-advantaged accounts (401k, IRA, Roth), donating appreciated assets to charity (avoid gains entirely), and timing your sales to stay in lower tax brackets.

🗺️ Compare Capital Gains Tax by State

Arkansas — 4.4% Oklahoma — 4.75% Arizona — 2.5% Mississippi — 5% Minnesota — 9.85% Kansas — 5.7% Idaho — 5.8% Nebraska — 6.64% View All 50 States →