401(k) Paycheck Impact Calculator 2026

How much a traditional 401(k) really reduces your take-home pay · 2026 limits and tax rates · updated October 2026

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Your take-home pay (bi-weekly)

$2,234

$58,083 a year · $4,840 a month · 16.6% of gross goes to taxes

Gross pay to net payBi-weeklyAnnual
Gross salary$2,885$75,000
Traditional 401(k) / 403(b)-$173-$4,500
Federal income tax-$257-$6,680
Social Security-$179-$4,650
Medicare-$42-$1,088
State income tax (est.)-$0-$0
Take-home pay$2,234$58,083

2026 federal rates. State tax is estimated from the state's 2026 employer withholding formula, so it approximates what comes out of each paycheck; local taxes are not included. For tips, overtime, car loan, age 65+ and child credits, use the full salary calculator.

Worked example: $75,000 salary, 6% to a traditional 401(k)

A single filer paid every two weeks contributes 6% of $75,000, which is $4,500 a year or $173 per paycheck.

No 401(k)6% 401(k)
Taxable income (after $16,100 standard deduction)$58,900$54,400
Federal income tax$7,670$6,680
Social Security + Medicare$5,738$5,738
Take-home per year$61,593$58,083
Take-home per bi-weekly paycheck$2,369$2,234
Saved in your 401(k) per year$0$4,500

The 401(k) moves $4,500 a year into retirement savings, but take-home pay falls by only $3,510 because federal income tax drops by $990 (the contribution falls in the 22% bracket). Social Security and Medicare do not change.

Paycheck cost of a 401(k) by salary

Reduction in take-home per bi-weekly paycheck (after the income tax savings). Single filer, state with no income tax, 2026.

SalaryTake-home now3% 401(k)6% 401(k)10% 401(k)15% 401(k)
$40,000$1,320-$41of $46 saved-$81of $92 saved-$135of $154 saved-$203of $231 saved
$50,000$1,629-$51of $58 saved-$102of $115 saved-$169of $192 saved-$254of $288 saved
$60,000$1,938-$61of $69 saved-$122of $138 saved-$203of $231 saved-$305of $346 saved
$75,000$2,369-$68of $87 saved-$135of $173 saved-$225of $288 saved-$348of $433 saved
$100,000$3,045-$90of $115 saved-$180of $231 saved-$300of $385 saved-$450of $577 saved
$150,000$4,377-$132of $173 saved-$263of $346 saved-$438of $577 saved-$658of $865 saved

Each cell shows how much your bi-weekly take-home drops, and how much goes into the 401(k) that paycheck. A state with income tax makes the real cost slightly lower again.

2026 contribution limits

  • Employee 401(k), 403(b), governmental 457(b) and TSP deferrals: $24,500
  • Catch-up for age 50 and older: $8,000 (age 60 to 63: $11,250 if the plan allows)
  • HSA (health savings account): $4,400 self-only, $8,750 family

Source: IRS Notice 2025-67 (2026 cost-of-living adjustments).

Frequently asked questions

How much does a 401(k) reduce my paycheck?
Less than the contribution itself, because a traditional 401(k) lowers your taxable income. For a single filer earning $75,000 who contributes 6% ($4,500 a year, $173 per bi-weekly paycheck), take-home falls by about $135 per paycheck, because federal income tax drops by about $990 a year (2026 rates, no state income tax).
Does a 401(k) reduce Social Security and Medicare taxes?
No. Traditional 401(k) contributions reduce federal and most state income tax, but they are still subject to Social Security and Medicare tax. Health insurance premiums, FSA and payroll HSA contributions do reduce Social Security and Medicare wages.
What is the 2026 401(k) contribution limit?
The employee elective deferral limit is $24,500 for 2026. Workers age 50 and older can add a $8,000 catch-up contribution, and workers aged 60 to 63 can make a higher catch-up of $11,250 if their plan allows it (IRS Notice 2025-67).
Is a traditional or Roth 401(k) better for take-home pay?
A traditional 401(k) lowers your paycheck by less today because you skip income tax now and pay it in retirement. A Roth 401(k) is paid from after-tax money, so your take-home falls by the full contribution, but qualified withdrawals in retirement are tax-free. The calculators on this site treat a Roth 401(k) as an after-tax deduction.
Does the employer match change my paycheck?
No. An employer match is paid into your account on top of your salary and does not reduce your take-home pay. It is free money, so contributing at least enough to get the full match is usually worth it.
How much tax do I save by maxing out a 401(k)?
On a $200,000 salary (single, no state income tax), contributing the $24,500 maximum lowers federal income tax by about $5,880 for the year. The savings depend on your tax bracket: each dollar contributed saves your marginal rate (10% to 37%) in federal income tax.

Related calculators

Need to change how much tax is withheld?

Our sister site W4Calc covers Form W-4 and withholding in depth.