Retirement & savings

401(k) Tax Savings Calculator

See how much federal and North Carolina tax you save with pre-tax 401(k) contributions, and what they really cost your paycheck.

Updated for the 2026 tax year

Estimates only. These calculators use simplified assumptions, 2026 federal and North Carolina rules and the numbers you enter. They don't account for every type of income, deduction, credit or circumstance, so your actual results may be different. They are for general information and are not tax, legal or investment advice. Using them doesn't create a CPA-client relationship with Stancil. Talk with a CPA about your own situation before acting on a result. The calculations run in your browser, and the calculator doesn't send the numbers you enter to Stancil.

Why pre-tax contributions cost less than you think

Traditional 401(k), 403(b) and 457(b) contributions come out of your pay before income tax. If you're in the 22% federal bracket and pay NC tax, a $1,000 contribution lowers your tax by about $260, so your take-home pay drops by only about $740.

2026 contribution limits

  • Employee contribution: $24,500
  • Catch-up, age 50 and over: $8,000 more ($32,500 total)
  • Super catch-up, age 60 to 63: $11,250 more ($35,750 total)

Employer matching contributions don't count toward your $24,500 limit.

New Roth catch-up rule

Starting in 2026, if your prior-year wages from the employer were over $150,000, your catch-up contributions must go in as Roth (after-tax). They grow tax-free, but they don't lower this year's tax.

Don't skip the match

If your employer matches contributions, contributing at least enough to get the full match is usually the best return available to you.

Frequently asked questions

What is the 401(k) limit for 2026?

$24,500 for employee contributions, plus an $8,000 catch-up if you're 50 or older, or an $11,250 catch-up if you're 60 to 63. Total contributions including your employer's share are limited to $72,000 (plus catch-ups).

Do 401(k) contributions reduce Social Security tax?

No. Traditional 401(k) contributions lower federal and state income tax, but Social Security and Medicare tax still apply to them.

Should I choose a traditional or Roth 401(k)?

Traditional is often better if you expect a lower tax rate in retirement; Roth if you expect a higher one. Try our Roth vs. traditional calculator to compare.