Retirement Tax in Colorado: Complete Guide 2026
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Retirement Tax in Colorado: Complete Guide 2026
Tax information is for educational purposes only and does not constitute tax advice. Consult a licensed tax professional for your specific situation.
Colorado offers a competitive retirement tax environment with its low flat 4.40% income tax rate, a generous retirement income subtraction for those 55 and older, and a full exclusion of Social Security benefits for qualifying taxpayers. The combination of these provisions means many Colorado retirees pay little or no state income tax on their retirement income, despite the state technically taxing it.
Colorado Retirement Tax Rates (2026)
| Component | Rate |
|---|---|
| Colorado flat income tax rate | 4.40% |
| Rate applied to retirement income (above subtractions) | 4.40% |
Taxation of Retirement Income Types
| Income Source | Colorado Tax Treatment |
|---|---|
| Social Security benefits | Not taxed (full subtraction for qualifying taxpayers) |
| Pension income (ages 55—64) | Up to ~$20,000 subtraction |
| Pension income (age 65+) | Up to ~$24,000 subtraction |
| 401(k) withdrawals (ages 55—64) | Up to ~$20,000 subtraction |
| 401(k) withdrawals (age 65+) | Up to ~$24,000 subtraction |
| Traditional IRA distributions (ages 55—64) | Up to ~$20,000 subtraction |
| Traditional IRA distributions (age 65+) | Up to ~$24,000 subtraction |
| Roth IRA qualified distributions | Not taxed |
| Military retirement pay | Not taxed (full subtraction, no cap) |
| Railroad Retirement (Tier I) | Not taxed |
How It Works
Social Security Subtraction
Colorado allows a full subtraction of Social Security benefits from state taxable income. This subtraction was expanded in recent years — previously limited to taxpayers 65+ with income below a threshold, it now applies to all qualifying Social Security recipients. Taxpayers under 65 who receive Social Security disability benefits also qualify.
The subtraction is applied at the state level only. Federal taxes on Social Security (up to 85% of benefits may be taxable federally) still apply.
Retirement Income Subtraction
Colorado provides an age-based subtraction for qualifying retirement income:
| Age Range | Maximum Subtraction |
|---|---|
| 55 — 64 | ~$20,000 per person |
| 65 and older | ~$24,000 per person |
Qualifying income includes pensions, annuities, 401(k) and 403(b) distributions, IRA distributions, and other retirement plan withdrawals. The subtraction is per person, so a married couple where both spouses are 65+ can subtract up to ~$48,000 combined.
Example: A married couple (both 65+) with $30,000 in Social Security, $40,000 in pension income, and $15,000 in IRA distributions:
- Social Security: fully subtracted = $0 taxable
- Pension + IRA ($55,000): subtract $48,000 = $7,000 taxable
- State tax: $7,000 x 4.40% = $308
Military Retirement Subtraction
Colorado fully subtracts military retirement pay from state taxable income with no dollar cap. This applies to all military retirees regardless of age.
PERA and Other Government Pensions
Colorado Public Employees’ Retirement Association (PERA) benefits are treated as qualifying retirement income for the subtraction. Federal and other state government pensions also qualify.
Comparison to National Average
| Metric | Colorado | Arizona | Wyoming | New Mexico |
|---|---|---|---|---|
| Social Security tax | Not taxed | Not taxed | Not taxed | Partial exclusion |
| Retirement subtraction | $20K—$24K/person | $2,500 (gov. pension) | N/A (no income tax) | Limited |
| Military retirement | Fully exempt | $3,500 subtraction | Not taxed | Partially exempt |
| Flat rate | 4.40% | 2.50% | 0% | Up to 5.90% |
| Property tax (avg.) | ~0.49% | ~0.55% | ~0.55% | ~0.67% |
Colorado’s retirement subtraction is among the most generous in states that have an income tax. For moderate-income retirees, the effective state tax rate on retirement income approaches zero.
Tips for Minimizing Colorado Retirement Tax
- Claim the full retirement income subtraction. Ensure you are using the correct age-based subtraction ($20,000 for 55—64, $24,000 for 65+) per person on your Colorado return.
- Verify your Social Security subtraction. Colorado now allows a full subtraction for qualifying Social Security income. If you were previously paying tax on Social Security at the state level due to the old income-based limitations, confirm you are now receiving the full benefit.
- Execute Roth conversions strategically. Colorado’s 4.40% flat rate makes Roth conversions relatively inexpensive. Converting in years when other income is low (and after applying the retirement subtraction) minimizes the state tax cost.
- Coordinate with the retirement subtraction. The retirement subtraction reduces your taxable retirement income. If your total retirement income is close to the subtraction limit, consider taking distributions up to the subtraction amount and deferring additional withdrawals.
- Claim the senior property tax exemption. Colorado offers a property tax exemption for qualifying seniors 65+ who have owned and occupied their home for at least 10 consecutive years. The exemption covers 50% of the first $200,000 of actual value.
- Manage RMDs with the subtraction in mind. Required minimum distributions that exceed the subtraction amount are taxed at 4.40%. Planning withdrawals to stay near the subtraction limit minimizes state tax.
- Factor in the TABOR refund. Colorado’s Taxpayer’s Bill of Rights (TABOR) mechanism can result in refunds to taxpayers when state revenue exceeds constitutional limits. These refunds partially offset state tax obligations.
Key Takeaways
- Colorado does not tax Social Security benefits (full subtraction)
- Retirement income subtraction of $20,000 (ages 55—64) or $24,000 (65+) per person shields most moderate retirement income
- Military retirement pay is fully subtracted with no cap
- The flat 4.40% rate applies to retirement income above the subtraction, keeping the effective rate very low
- A married couple 65+ can exclude up to $48,000 of retirement income plus all Social Security from state tax
- Property taxes average only ~0.49%, among the lowest in the country
Next Steps
- See the full Colorado tax picture at Taxes in Colorado: State Tax Guide 2026
- Compare all states at State Income Tax Rates Comparison 2026
- Calculate your federal bracket with the Tax Bracket Calculator 2026
- Explore capital gains at Capital Gains Tax in Colorado 2026
- Get professional guidance: Find a CPA Near You