Free 401(k) calculator

401(k) Calculator
Contributions · match · growth

Estimate your annual 401(k) deferral, employer match under a sample formula, and optional multi-year growth at a rate you control.

Live Updates as you type
Teaching model: employer pays matchRate% of your deferral, but only on deferrals up to matchUpTo% of salary. Real plans differ—check your SPD.
Return is a sample you type—not a market forecast. Set years to 0 for one-year contributions only.
Total annual contribution
$0
You (annual)
$0
Employer match
$0
Match left on table
$0
Projected balance
$0

Compound interest ROI calculator

Educational estimate only. Not investment, tax, or retirement advice. Match formulas vary by employer; growth is a constant-rate sample, not a forecast.

Compare your contribution %

Same salary and match rules
Your % You Employer Total / yr Missed match

Year-by-year projection

Educational growth path
Year You Employer End balance

Key takeaways

  • Sample only: $80,000 salary · 6% deferral · 50% match up to 6% → you about $4,800/yr, employer about $2,400/yr, total about $7,200/yr.
  • Match window: deferring less than the “match up to” percent can leave match on the table under this teaching formula.
  • Not advice: Growth uses a constant sample return. Real markets, fees, and vesting differ.
  • How the 401(k) calculator works

How it works

Employee dollars = salary × your %. Employer match uses a sample formula: match rate × the lesser of your deferral and the match window. Optional years compound at a return you type. Details: how we calculate.

Worked examples

Guides

How does this 401(k) calculator work?

It estimates your annual deferral, employer match under a sample “match X% of deferrals up to Y% of salary” formula, and optional multi-year growth at a return rate you type. Sample: $80,000 · 6% · 50% match up to 6% → about $7,200/year total. Educational only.

Is the return a market forecast?

No. You type a sample annual return. Nestfigure does not forecast markets or recommend investments.

Does this match my employer’s plan?

Maybe not. Match formulas differ (tiers, true-up, vesting). Use your plan summary and adjust the match rate and “up to” percent.

Can I prefill from a link?

Yes. Parameters: salary, employee, matchRate, matchUpTo, years, return.

Is this calculator free?

Yes—free, no signup. Educational math only—not tax or investment advice.

How we calculate · Common questions · Sample prefill · Compound interest · How long savings last

Disclaimer: Educational estimates only—not investment advice, tax advice, plan design, or a guarantee of match or returns.

YMYL notice: This site is for education only. It is not financial, tax, or investment advice. Nestfigure is not a bank, credit union, broker, investment adviser, or fiduciary. Product terms, rates, and penalties vary—always read your institution’s disclosures before acting. Calculator results are mathematical estimates, not bank quotes.