Colorado Paycheck Calculator (2026 Take-Home Pay)

Colorado applies one rate, 4.4%, to taxable income. Because the state borrows the federal base rather than building its own, anything that lowers federal taxable income lowers Colorado tax by the same 4.4 cents on the dollar. There are no local wage taxes to add. The result is a clean subtraction:

The calculator works through four steps:

1. FICA Payroll Tax Computation: Assessed on the full gross salary, before any pre-tax deduction is subtracted. - Social Security (OASDI): 6.20% withheld on wages up to the 2026 statutory wage base ($184,500). - Medicare (HI): 1.45% withheld on all gross earnings (no wage cap), plus 0.90% Additional Medicare Tax on earnings exceeding $200,000 (single) or $250,000 (married filing jointly).
2. Federal Income Tax Withholding: Evaluated using 2026 progressive federal tax brackets (10%, 12%, 22%, 24%, 32%, 35%, 37%) on gross salary less the pre-tax deduction, after applying standard deduction thresholds ($16,100 single / $32,200 married joint).
3. Colorado State Income Tax Withholding: A flat 4.4% applied to the same gross-less-pre-tax figure. No state standard deduction and no state subtraction or credit is applied first, so the state line here sits above what a Colorado employer would actually withhold for most filers.
4. Pay Period Proration: Annual net compensation is divided across the designated pay frequency (26 bi-weekly, 24 semi-monthly, 12 monthly, or 52 weekly pay periods).

Consider an employee in Colorado earning $75,000 annually, paid bi-weekly (26 paychecks per year), filing single, with $3,500 in annual pre-tax 401(k) contributions.

1. Gross pay per paycheck. $75,000 ÷ 26 pay periods = $2,884.62 before any withholding.
2. Pre-tax deduction. The $3,500 annual 401(k) contribution reduces each paycheck by $134.62 and also shrinks the wages used to calculate federal and state income tax; FICA is still assessed on the full gross amount.
3. FICA payroll taxes. Social Security withholds 6.2% of gross pay and Medicare withholds 1.45%, for $220.67 per paycheck.
4. Federal income tax withholding. Applying the 2026 federal schedule to the reduced taxable wage withholds $265.38 per paycheck.
5. Colorado state tax withholding. The flat 4.4% applied to the same reduced wage withholds $121.00 per paycheck.
6. Net take-home pay. $2,884.62 gross, minus $134.62 pre-tax, minus $220.67 FICA, minus $265.38 federal tax, minus $121.00 state tax leaves $2,142.94 per paycheck, or $55,716.50 per year, an effective total tax rate of 21.04%.

Carrying Into Month Two And The Full Year

Colorado taxes at a flat 4.4% from the first taxable dollar, which makes its cumulative column the cleanest straight line in the schedule -- no bracket ever changes underneath it.

Step 7 -- Two months of cumulative pay. The schedule's first row shows $6,250.00 of cumulative gross against $4,643.04 of cumulative take-home. Row two doubles both: $12,500.00 gross, $9,286.08 take-home, with $3,213.92 accumulated on the deduction side.

Step 8 -- The full year. By month twelve the schedule reaches $75,000.00 of cumulative gross and $55,716.50 of cumulative take-home, adding $4,643.04 every month without variation.

Step 9 -- What the year actually withheld. The cumulative deduction column closes at $19,283.50. That column carries the $3,500 pre-tax 401(k) contribution alongside the tax, so tax alone is $19,283.50 - $3,500 = $15,783.50, an effective total tax rate of 21.04% on $75,000.00 of gross pay.

Step 10 -- Why the monthly increment never changes. The rows climb in equal steps, and it is worth knowing why. FICA is resolved annually -- 6.2% on wages up to the $184,500 Social Security base, 1.45% on everything, and 0.9% more above $200,000 filing single -- and that annual number is then apportioned evenly over twelve months. Nothing in the schedule steps down partway through the year. On a $75,000 salary nothing would step down in reality either; both thresholds sit far above this wage.

Run the salary axis and the Colorado line does exactly one thing: it rises in proportion. State withholding is $44.85 per bi-weekly check at $30,000 of salary, $121.00 at $75,000, $247.92 at $150,000 and $501.77 at $300,000, a straight line with no edge anywhere on it, because 4.4% never changes. That is a real finding rather than an absence of one: a Colorado worker cannot be pushed into a higher state bracket by a raise, a bonus or a vesting event, at any income. Every step in the curve below is federal or FICA.

The federal edge that lands at $70,000 of gross salary

With $3,500 of pre-tax deductions and the $16,100 single standard deduction, the federal 12% band ends at exactly $70,000 of gross.

At $69,000 of salary. Take-home is $1,986.90 per check, federal withholding $218.46, state $110.85. Annual net is $51,659.50.

At $70,000, at the boundary. Take-home is $2,016.12 per check, federal withholding $223.08, state $112.54. Annual net is $52,419.00, so that thousand added $759.50 to the year.

At $71,000, past it. Take-home is $2,041.48 per check, federal withholding $231.54, state $114.23. Annual net is $53,078.50, and the identical thousand adds only $659.50.

The edge costs $100.00 of annual take-home on the same raise. Colorado's share of both thousands was $44.00, unchanged, which is the whole point of a flat rate.

The Social Security wage base at $184,500

At $184,000 of salary, annual net take-home is $126,428.00, FICA $541.38 per check.

At $185,000, annual net is $127,098.50, FICA $543.13. That thousand was worth $670.50.

At $186,000, wholly above the base, annual net is $127,800.00 and FICA is $543.69 per check, so that thousand was worth $701.50 -- $31.00 more than the one below it, because the 6.2% Social Security component has stopped.

The twelve rows show none of it, at $186,000 or at any salary, because FICA is resolved annually and only then divided by twelve.

The marginal cost of the next $1,000

Annual net take-home is $55,057.00 at $74,000 of salary, $55,716.50 at $75,000 and $56,376.00 at $76,000. Each additional $1,000 of salary is worth $659.50 of annual take-home in Colorado, and costs $340.50 in tax, of which exactly $44.00 is Colorado's, at any income.

Running the calculator backwards

Sweeping in $500 steps at the default settings, $109,000 is the first salary at which the bi-weekly check reaches $3,000, paying $3,005.37 against $2,992.68 at $108,500. And $143,000 is the first salary whose annual net take-home clears $100,000, at $100,208.50 against $99,888.75 at $142,500.

The pre-tax dollar, priced

At $3,500 of pre-tax deductions, annual net take-home is $55,716.50, state withholding $121.00 per check.

At $10,000, annual net take-home is $50,782.50, state withholding $110.00 per check.

Contributions rose by $6,500.00 while spendable take-home fell by only $4,934.00. The $1,566.00 difference is tax that was never withheld, and the full $10,000 is still the employee's money. Colorado's flat rate makes its portion of that saving exactly 4.4% of $6,500, or $286.00 for the year.

The Total Effective Tax Rate output falls from 21.04% to 18.96% over that same change, because the contribution is excluded from that ratio's numerator, while the Cumulative Deductions column moves the other way, because it counts the contribution as a deduction. Two outputs, two definitions, one page.

Multiplying the paycheck by 26. Twenty-six times $2,142.94 is $55,716.44, six cents under the engine's $55,716.50; twelve times the monthly $4,643.04 gives $55,716.48. The annual figure is computed first and the check derived from it, which is why annual net is $55,716.50 on every frequency -- weekly $1,071.47, bi-weekly $2,142.94, semi-monthly $2,321.52, monthly $4,643.04.

Reading Cumulative Deductions as tax. The column closes at $19,283.50 against $15,783.50 of real tax. Quoted as tax it reads 25.71% of $75,000 where the correct figure is 21.04%, overstating the burden by 4.67 percentage points.

Assuming the 4.40% rate is settled for 2026. It is the statutory baseline carried here, not a published 2026 rate. Colorado's rate is temporarily reduced whenever there is a TABOR surplus, which is how 2024 was actually filed at 4.25%. Every state figure on this page is computed at 4.4%.

• No state standard deduction, subtraction or credit. Colorado taxable income is taken as gross less the pre-tax box and nothing else, so the state line here is an upper bound on real Colorado withholding.
• A provisional rate. The Colorado Department of Revenue's own rate-by-year table stops at 2025. 4.40% is the correct statutory baseline to carry, but the rate actually filed for 2026 may land lower under the TABOR surplus mechanism, and nothing on this page models that.
• No local wage taxes. Colorado municipal occupational privilege taxes are flat per-month charges, not wage percentages, and are not modelled.
• No W-4 detail. No dependents, no multiple-jobs checkbox, no extra per-period withholding, no other-income entry. Filing status is single or married filing jointly only.
• One pre-tax box, no post-tax box. 401(k), HSA and FSA share a single annual field with no employer match and no per-plan limit. Roth contributions, garnishments and post-tax premiums are absent.
• FICA is annual, then prorated. The twelve rows never show the wage-base step at any salary, for the reason in Step 10.
• Two definitions on one page. The effective rate output excludes the pre-tax deduction from its numerator; the Cumulative Deductions column includes it, and the gap between them is exactly the contribution.

• Internal Revenue Service (IRS): Publication 15 (Circular E) and Publication 15-T (2026). irs.gov/publications/p15
• Social Security Administration (SSA): 2026 Social Security Wage Base Limit. ssa.gov
• Colorado Department of Revenue: Individual Income Tax Guide, revised January 2026, and section 39-22-627 C.R.S. tax.colorado.gov