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401(k) Calculator
Estimate how much your workplace retirement account could hold by retirement based on your current balance, yearly deferrals, employer match, and long-run return assumptions.
Projected balance
$2,205,642
Years to invest
35
Employer match added
$16,800
Investment growth
$1,723,842
EveryCalc calculators are designed for fast, practical estimates with transparent inputs and no required account. We use plain formulas, visible assumptions, and related tools so visitors can check the result from more than one angle.
Results are informational only. For financial, tax, legal, medical, construction, or other high-impact decisions, verify the output against primary sources or a qualified professional.
Learn more about our review process on the EveryCalc methodology page.
Calculation notes and example
401(k) balance and simplified match model
The calculator advances the balance one year at a time: opening balance multiplied by one plus annual return, then annual employee contribution plus employer match are added. The match input is explicitly a percentage of the employee contribution, not a percentage of salary. Total employee contributions equal annual contribution multiplied by years; total match uses that contribution multiplied by the entered match percentage and years. Contributions are treated as year-end deposits, returns are constant, and salary growth is not modeled.
Contribution-based match example
A worker age 32 with $45,000 saved, a $12,000 annual contribution, and a match equal to 4% of that contribution receives $480 of modeled employer money per year. Through age 67, employee deposits total $420,000 and modeled match totals $16,800 before growth. If the actual plan matches a percentage of salary or uses a tiered formula, first convert its expected annual dollars into a percentage of the contribution entered here.
Plan details to verify
- Check current IRS elective-deferral, catch-up, and total contribution limits before relying on the entered annual amount.
- Read the plan's exact match and vesting formula. A match percentage of salary is not the same as this calculator's percentage of contribution.
- The result is nominal and excludes fees, taxes at withdrawal, changing contributions, salary growth, loans, and market volatility.
Useful companion tools: Retirement Calculator, Inflation Calculator, Compound Interest Calculator, and Debt Payoff Calculator.
How to interpret the 401(k) result
Best use
Use the result as a planning number for comparing payments, rates, returns, tax reserves, or cash-flow choices before you request a quote or make a commitment.
Cross-check
Compare the answer with the contract, lender estimate, tax form, brokerage statement, payroll record, or invoice that will control the real-world outcome.
Watch for
Do not rely on a single optimistic rate, return, or fee assumption. Money pages work best when you run low, base, and high cases and keep professional advice separate from the estimate.
This page belongs to the Finance calculator library, so the answer should be read in the context of the decision you are modeling rather than as a universal rule.
Before relying on this 401(k) estimate
Most calculator mistakes come from the inputs, not the arithmetic. Use this short audit before you reuse the answer in a spreadsheet, quote, application, or important conversation.
Confirm source numbers
Match balances, rates, fees, taxes, income, and payment dates against the lender quote, payroll record, tax form, statement, invoice, or contract.
Separate cash flow from total cost
A lower monthly payment can still cost more over time if fees, interest, taxes, or a longer term are hidden in the structure.
Run conservative cases
Test at least one higher-cost or lower-return case before using the output for a purchase, refinance, investment, loan, or tax decision.
Rerun this page when the rate, price, term, fee, tax rule, income, expense, or expected holding period changes.
Sources used for this calculator
These primary or official references help define the rules, terminology, safety checks, or source documents behind this estimate. Source links were checked in July 2026. They do not turn the calculator output into a quote, appraisal, tax determination, or professional opinion.
- 401(k) and profit-sharing plan contribution limits
Internal Revenue Service
Check current elective-deferral, catch-up, and overall contribution limits before setting a savings plan.
How to Use
- Enter your current age, planned retirement age, and the balance already in your 401(k).
- Add the amount you expect to contribute each year through payroll deductions.
- Convert the plan's expected annual match dollars into a percentage of your annual contribution, then enter that contribution-based match percentage.
- Review the projected ending balance, total contributions, employer match, and investment growth before adjusting your savings rate.
Frequently Asked Questions
What is a 401(k) calculator useful for?
It helps you see how contribution rate, employer match, and time until retirement can change the size of your account, which makes it easier to decide whether to increase payroll deferrals now.
How does the employer match input work?
It is the employer match as a percentage of the annual contribution entered, not a percentage of salary. For example, a $600 expected match on a $12,000 contribution is 5%. Convert your plan's formula to expected annual dollars before entering it.
Should I model several return assumptions?
Yes. Retirement planning is stronger when you compare conservative, baseline, and optimistic return scenarios instead of trusting one perfect forecast.
Does this include current IRS contribution limits?
No. This page is a planning calculator, so you should still verify the current tax-year 401(k) limits and any catch-up rules separately.
Is the projection inflation adjusted?
No. The result is a nominal future balance estimate, so you may want to compare it with an inflation-adjusted retirement calculator too.
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