Colorado Stock & Capital Gains Tax Calculator

Estimate your exact federal and Colorado investment taxes for 2026.

Colorado Tax Overview: Colorado taxes capital gains at a flat state income tax rate. Top State Rate: 4.4%. Flat rate applies to both short-term and long-term gains.
Determines your standard deduction and IRS tax brackets.
Single
Married
Your standard employment earnings. Investment profits are stacked on top of this base to find your marginal brackets.
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Profits from assets held for 1 year or less. Taxed as ordinary income.
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Profits from assets held for more than 1 year. Taxed at reduced rates (0%, 15%, or 20%).
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Your losing stock trades this year. Used to offset gains, with up to a $3,000 net deduction against your W-2 salary.
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Applies state-level progressive income rules or flat-rate exceptions.
Colorado
Total Estimated Tax Owed
$12,206.00
Net Profit (What you keep)
$794.00

Tax Breakdown

Net Capital Gains $13,000
Federal Tax (Ordinary + Long-Term) $8,774
State Tax (Colorado) $3,432

US Stock & Capital Gains FAQ

Understanding preferential tax stacking, holding durations, and IRS wash-sale guidelines.

Capital Gains
Trader Tax Status
IRS Rules
Does Colorado tax long-term capital gains differently than short-term?

Colorado taxes capital gains at a flat state income tax rate. Top marginal state rate: 4.4%. Flat rate applies to both short-term and long-term gains.

What is the difference between Short-Term and Long-Term gains?

The IRS heavily rewards holding stocks. If you sell a stock after holding it for less than a year, it is a Short-Term gain and taxed at your normal income bracket. If you hold it for over a year, it is a Long-Term gain and taxed at a preferential flat rate (usually 15%).

How much of my losses can I write off?

If your stock market losses exceed your gains for the year, the IRS only allows you to deduct a maximum of $3,000 against your normal W-2 income. Any remaining losses must be 'carried forward' to future tax years.