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401k Growth Calculator 2026

A 401k is the most powerful retirement tool most Americans have access to. Compound growth + employer matching + tax deferral can turn modest contributions into life-changing wealth.

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2026 401k Contribution Limits

The Power of Employer Matching

Employer matching is a 100% instant return on your contribution. Never leave it on the table.

Growth Projection Examples

Monthly Contribution30 Years @7%30 Years @8%
$200/mo$242,887$272,681
$500/mo$607,176$681,853
$1,000/mo$1,214,363$1,363,707
$1,958/mo$2,377,403$2,668,839

Frequently Asked Questions

How much should I contribute to my 401k in 2026?

At minimum, contribute enough to get the full employer match. Ideally, aim for 15% of gross income including the match. The 2026 employee limit is $23,500.

What is a good 401k balance at 40?

A common benchmark is 3× your annual salary by age 40. If you earn $70,000, aim for $210,000 in retirement savings by 40.

Traditional vs Roth 401k — which is better?

Traditional 401k: pre-tax contributions, pay taxes in retirement. Roth 401k: after-tax contributions, tax-free in retirement. If you expect to be in a higher bracket in retirement, Roth often wins.

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