Colorado +6 more Retirement Income Tax Calculator
Colorado taxes a portion of Social Security benefits.
Colorado, Utah, West Virginia, Montana, New Mexico, Connecticut, Vermont share this page.
Their rules produce the same answer to within a rounding difference, so publishing
separate near-identical pages would add URLs without adding information. Every figure
below applies to all 7.
Colorado retirement income tax estimator
Colorado taxes a portion of Social Security benefits.
Colorado tax —
After state tax —
Effective state rate —
Colorado at a glance
| Figure | Colorado | Source |
|---|---|---|
| Taxes Social Security? | Yes (partially) | [2] |
| Top marginal rate | 4.40% | [2] |
| Taxes pension income? | Generally yes | [2] |
| Cost of living index | 101.8 | [1] |
Colorado highlighted. Same data as the table below, shown as a distribution so the comparison is visible at a glance.
Highlighted: Colorado, ranked 29 of 50. Median 4.55%.
Colorado state tax by retirement income mix
Annual Colorado tax on each combination of Social Security and other retirement income.
| Social Security | No other income | +$10,000 other | +$20,000 other | +$30,000 other | +$45,000 other | +$60,000 other | +$80,000 other | +$110,000 other |
|---|---|---|---|---|---|---|---|---|
| $9,000 | $337 | $777 | $1,217 | $1,657 | $2,317 | $2,977 | $3,857 | $5,177 |
| $12,000 | $449 | $889 | $1,329 | $1,769 | $2,429 | $3,089 | $3,969 | $5,289 |
| $15,000 | $561 | $1,001 | $1,441 | $1,881 | $2,541 | $3,201 | $4,081 | $5,401 |
| $18,000 | $673 | $1,113 | $1,553 | $1,993 | $2,653 | $3,313 | $4,193 | $5,513 |
| $21,000 | $785 | $1,225 | $1,665 | $2,105 | $2,765 | $3,425 | $4,305 | $5,625 |
| $24,000 | $898 | $1,338 | $1,778 | $2,218 | $2,878 | $3,538 | $4,418 | $5,738 |
| $27,000 | $1,010 | $1,450 | $1,890 | $2,330 | $2,990 | $3,650 | $4,530 | $5,850 |
| $30,000 | $1,122 | $1,562 | $2,002 | $2,442 | $3,102 | $3,762 | $4,642 | $5,962 |
| $33,000 | $1,234 | $1,674 | $2,114 | $2,554 | $3,214 | $3,874 | $4,754 | $6,074 |
| $36,000 | $1,346 | $1,786 | $2,226 | $2,666 | $3,326 | $3,986 | $4,866 | $6,186 |
| $39,000 | $1,459 | $1,899 | $2,339 | $2,779 | $3,439 | $4,099 | $4,979 | $6,299 |
| $42,000 | $1,571 | $2,011 | $2,451 | $2,891 | $3,551 | $4,211 | $5,091 | $6,411 |
| $45,000 | $1,683 | $2,123 | $2,563 | $3,003 | $3,663 | $4,323 | $5,203 | $6,523 |
| $48,000 | $1,795 | $2,235 | $2,675 | $3,115 | $3,775 | $4,435 | $5,315 | $6,635 |
| $54,000 | $2,020 | $2,460 | $2,900 | $3,340 | $4,000 | $4,660 | $5,540 | $6,860 |
Worked figures for Colorado
Colorado values:
| Profile | Gross | State Tax | Net | Effective |
|---|---|---|---|---|
| $18,000 SS + $0 pension + $5,000 401k | $23,000 | $893 | $22,107 | 3.88% |
| $24,000 SS + $0 pension + $10,000 401k | $34,000 | $1,338 | $32,662 | 3.93% |
| $24,000 SS + $12,000 pension + $10,000 401k | $46,000 | $1,866 | $44,134 | 4.06% |
| $30,000 SS + $20,000 pension + $15,000 401k | $65,000 | $2,662 | $62,338 | 4.10% |
| $30,000 SS + $30,000 pension + $20,000 401k | $80,000 | $3,322 | $76,678 | 4.15% |
| $36,000 SS + $40,000 pension + $25,000 401k | $101,000 | $4,206 | $96,794 | 4.16% |
| $42,000 SS + $50,000 pension + $40,000 401k | $132,000 | $5,531 | $126,469 | 4.19% |
| $48,000 SS + $60,000 pension + $50,000 401k | $158,000 | $6,635 | $151,365 | 4.20% |
How Colorado compares nationally
On top marginal income tax rate, Colorado ranks #29 of 50 at 4.40% — 3% below the median of 4.55%. The national range runs from 0.00% (Wyoming) to 13.30% (California).
| Rank | State | Top marginal income tax rate |
|---|---|---|
| #27 | Oklahoma | 4.50% |
| #28 | Utah | 4.50% |
| #29 | Colorado | 4.40% |
| #30 | Michigan | 4.25% |
| #31 | Mississippi | 4.00% |
Taxes Social Security benefitss, ranked
Same rule structure as Colorado:
| State | Top marginal income tax rate | vs Colorado |
|---|---|---|
| Minnesota | 9.85% | +123.9% |
| Rhode Island | 5.99% | +36.1% |
| Colorado | 4.40% | — |
Colorado questions, answered with Colorado numbers
Does Colorado tax Social Security?▾
Yes, Colorado taxes a portion of Social Security benefits.
What would a $65,000 retirement income cost in Colorado tax?▾
On $30,000 Social Security, $20,000 pension and $15,000 of 401(k) withdrawals, Colorado would take about $2,662 — an effective state rate of 4.10%, leaving $62,338.
Is Colorado a good state to retire in on taxes alone?▾
Colorado's top marginal rate is 4.40% and its cost of living index is 101.8. Tax is only one input — housing at a $543,000 median matters at least as much.
Other taxes social security benefitss
Last reviewed 2026-08-26. Colorado figures only — verify with the relevant Colorado agency before acting. How this is calculated.