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401(k) Calculator

Calculate your 401(k) retirement savings

Retirement Balance

$897,369

Contributions

$150,000

Employer Match

$75,000

Growth

$622,369

$
$
%

Common: 50% match up to 6% of salary

%

Historical average: 7-10%

Retirement Balance

$897,369

at retirement

Contributions

$150,000

Employer Match

$75,000

Total Invested

$275,000

Growth

$622,369

Balance Growth Over Time

Final Balance Breakdown

Frequently Asked Questions

Q

How does a 401(k) work?

A 401(k) is an employer-sponsored retirement plan where you contribute pre-tax dollars from your paycheck. Your contributions lower your current taxable income, grow tax-deferred, and are taxed upon withdrawal in retirement. Many employers also match your contributions - essentially free money.

  • Pre-tax contributions reduce your current taxable income
  • Investments grow tax-deferred (no annual capital gains taxes)
  • Withdrawals in retirement are taxed as ordinary income
  • Employer matching is free money - always get the full match
  • Roth 401(k) option: after-tax contributions, tax-free withdrawals

Example: On $75,000 salary with 10% contribution, you save $7,500/year pre-tax. If your employer matches 50% up to 6%, they add $2,250 (50% of $4,500). Total annual 401(k) contribution: $9,750. After 30 years at 7% return, that's over $950,000.

Q

What is employer 401(k) match and how does it work?

Employer match is free money your employer contributes to your 401(k) based on your contributions. Common formulas: 50% match up to 6% of salary (effectively 3% free), 100% match up to 3% (3% free), or 100% up to 4% then 50% up to 6% (5% free). Always contribute enough to get the full match.

  • Not getting full match = leaving money on the table
  • Match is typically subject to vesting schedule (1-6 years)
  • Check your plan documents for exact match formula
  • Some employers match in company stock (consider diversifying)
Match FormulaYour ContributionEmployer AddsOn $80K Salary
50% up to 6%6% ($4,800)3% ($2,400)$7,200 total
100% up to 3%3% ($2,400)3% ($2,400)$4,800 total
100% up to 4%, 50% next 2%6% ($4,800)5% ($4,000)$8,800 total
Dollar-for-dollar up to 6%6% ($4,800)6% ($4,800)$9,600 total

Employer match provides 50-100% instant return on your money - no investment can beat that. If your employer matches 50% up to 6%, contribute at least 6% to get the full 3% free match. Missing the full match on $80K salary costs you $2,400/year in free money.

Q

How much should I contribute to my 401(k)?

Contribute at minimum enough to get full employer match (free money). Ideally, save 15-20% of income for retirement (including match). 2024 limits: $23,000 employee contribution ($30,500 if 50+). If you can't hit 15%, start with match and increase 1% annually with raises.

  • 2024 employee contribution limit: $23,000
  • Age 50+ catch-up contribution: Additional $7,500 ($30,500 total)
  • Total limit (employee + employer): $69,000 (2024)
  • Increase contribution 1% each year or with every raise
  • After 401(k) match, consider maxing IRA before more 401(k)
StrategyContributionPriority LevelWhen to Use
MinimumGet full matchEssentialIf budget is tight
Target10-15% of incomeRecommendedMost people
Aggressive15-20% of incomeIdealIf you can afford it
Maximum$23,000 (2024)OptimalHigher earners

A good order of operations: 1) Contribute to 401(k) up to full employer match, 2) Max out Roth IRA ($7,000/year), 3) Return to 401(k) and max it out, 4) HSA if eligible, 5) Taxable brokerage for additional savings.

Q

What is a good 401(k) return rate?

Historical stock market returns average 7-10% annually (10% nominal, 7% after inflation). A balanced 401(k) portfolio with 80% stocks/20% bonds typically returns 7-9%. Target-date funds automatically adjust allocation as you age. Expect volatility - some years gain 30%, others lose 20%.

  • Use 7% for conservative retirement projections
  • Past performance doesn't guarantee future returns
  • Lower expense ratios = higher returns (check fund costs)
  • Diversify across US stocks, international, and bonds
  • Don't panic sell during market downturns
Portfolio TypeExpected ReturnVolatilityBest For
100% Stock Funds9-10%HighYoung investors (30+ years)
80/20 Stocks/Bonds7-9%Medium-HighMost workers
60/40 Stocks/Bonds6-7%MediumNear retirement
Target-Date Fund7-9%AutomaticHands-off investors
Q

Traditional 401(k) vs Roth 401(k) - which is better?

Traditional 401(k): Pre-tax contributions, taxed at withdrawal. Better if you expect lower tax bracket in retirement. Roth 401(k): After-tax contributions, tax-free withdrawals. Better if you expect same or higher tax bracket later. Many experts recommend splitting contributions 50/50.

  • Young/early career: Often Roth is better (low tax bracket now)
  • Peak earning years: Often Traditional is better (high bracket now)
  • Tax diversification: Split between both for flexibility
  • Both have same contribution limits ($23,000 total in 2024)
FeatureTraditional 401(k)Roth 401(k)
Tax on contributionsPre-tax (reduces current income)After-tax (no current benefit)
Tax on withdrawalsTaxed as ordinary incomeTax-free (if qualified)
Best forHigher tax bracket nowLower tax bracket now
RMDs in retirementRequired at 73Required at 73 (can rollover to Roth IRA)

Nobody knows future tax rates. Having both Traditional and Roth balances gives you flexibility in retirement to minimize taxes. If your employer offers Roth 401(k), consider splitting contributions between Traditional and Roth.

Q

What happens to my 401(k) when I leave my job?

You have four options: 1) Leave it with former employer (if allowed), 2) Roll over to new employer's 401(k), 3) Roll over to IRA (most flexibility), 4) Cash out (avoid - 10% penalty + taxes if under 59½). Rollover to IRA is usually best for investment options and lower fees.

  • Rollover to IRA: Most investment choices, no taxes if done correctly
  • Roll to new 401(k): Keeps all retirement in one place, potential loan access
  • Leave with old employer: Simple, but may have limited investment options
  • Cash out: Worst option - 10% penalty + income taxes (lose 30-40%)
  • Direct rollover (trustee-to-trustee) avoids withholding
OptionProsConsBest When
Rollover to IRAMore choices, low feesNo 401(k) loansUsually best option
Roll to new 401(k)Consolidation, loan accessLimited to plan optionsNew plan has good funds
Leave with old employerNo action neededMay forget about itGood plan, planning to return
Cash outImmediate access30-40% lost to taxes/penaltiesAlmost never

Example Calculations

125-Year 401(k) with 50% Employer Match

Inputs

Current 401(k) Balance$50,000
Monthly Contribution$500
Employer Match50%
Expected Annual Return7%
Years to Retirement25

Result

Retirement Balance$897,369
Your Contributions$150,000
Employer Match Total$75,000
Total Invested$275,000
Investment Growth$622,369

Contributing $500/month with a 50% employer match ($250/month extra) at 7% return for 25 years, a $50,000 starting balance grows to $897,369. Of that total, $150,000 is your contributions, $75,000 is free money from employer matching, and $622,369 is investment growth.

230-Year 401(k) with 100% Employer Match

Inputs

Current 401(k) Balance$20,000
Monthly Contribution$750
Employer Match100%
Expected Annual Return8%
Years to Retirement30

Result

Retirement Balance$2,469,157
Your Contributions$270,000
Employer Match Total$270,000
Total Invested$560,000
Investment Growth$1,909,157

With $750/month and a dollar-for-dollar employer match ($750/month extra), 8% return, and 30 years of growth from a $20,000 starting balance, the 401(k) reaches $2,469,157. The employer match alone contributed $270,000, and investment growth added $1,909,157.

Formulas Used

401(k) Monthly Growth

Each month: Balance = (Balance + Contribution + Employer Match) x (1 + r/12)

Each month the employee contribution and employer match are added, then the total balance grows by the monthly return rate.

Where:

Balance= Current 401(k) account balance
Contribution= Employee monthly contribution
Employer Match= Contribution x (Match Percent / 100)
r= Annual expected return rate (as a decimal)

Investment Growth

Growth = Total Value - (Starting Balance + Total Contributions + Total Employer Match)

Investment growth is the portion of the final balance that came from compound returns, not from deposits.

Where:

Growth= Total returns from investment growth
Total Value= Final 401(k) balance at retirement
Starting Balance= Initial 401(k) balance
Total Contributions= Sum of all employee contributions
Total Employer Match= Sum of all employer matching contributions

Understanding 401(k) Retirement Plans

1

How 401(k) Tax-Deferred Growth Builds Wealth

An employee earning $80,000 who contributes 10% to a traditional 401(k) reduces their taxable income by $8,000 annually, saving roughly $1,760 in federal taxes at the 22% bracket. That $8,000 per year invested at 7% compounding over 30 years grows to approximately $809,000 — far more than the $240,000 in total contributions. The tax-deferred structure means no annual capital gains drag, letting every dollar of growth reinvest immediately.

The 2024 employee contribution limit is $23,000 ($30,500 for workers age 50 and older). When combined with employer contributions, the total limit reaches $69,000 per year. These limits adjust for inflation annually, so the ceiling rises over time. Starting early is critical: a 25-year-old investing $500/month at 7% accumulates roughly $1.2 million by age 65, while a 35-year-old contributing the same amount reaches only about $567,000 — a $633,000 gap from just 10 fewer years of compounding.

Roth 401(k) options flip the tax advantage. Contributions are after-tax, but all qualified withdrawals — including decades of growth — come out tax-free. For workers currently in a 12% or 22% bracket who expect higher rates in retirement, the Roth path can save tens of thousands in lifetime taxes.

401(k) Growth: $500/mo at 7% Over 30 Years$0$200K$400K$600K$800KYr 5Yr 10Yr 15Yr 20Yr 25Yr 30ContributionsInvestment Growth
2

Employer Match: The Highest-Return Investment Available

A dollar-for-dollar employer match on the first 4% of salary delivers a 100% instant return — no publicly traded asset comes close. On an $80,000 salary, that match is worth $3,200 per year; over 30 years at 7% growth, the employer contributions alone compound to roughly $321,000. Missing the full match by contributing only 2% instead of 4% forfeits $1,600 annually, or about $160,000 in lost retirement wealth.

Common match structures vary significantly. The Bureau of Labor Statistics reports that 56% of private-industry workers with access to a defined-contribution plan receive an employer match. The most popular formula — 50% of the first 6% of salary — effectively gives you 3% free. Other plans offer tiered matches: 100% on the first 3%, then 50% on the next 2%, totaling a 4% match for a 5% contribution. Always contribute at least enough to capture every matching dollar before directing money elsewhere.

Vesting schedules determine when employer contributions become fully yours. Cliff vesting grants 100% ownership after 3 years; graded vesting increases ownership 20% per year over 6 years. If you leave before fully vesting, you forfeit the unvested portion. Factor vesting into any job-change decision — leaving one year before full vesting on a $5,000/year match could cost $15,000 or more.

*30-year values assume 7% annual return on employer match contributions only
Match FormulaYour 6% on $80KEmployer Adds30-Yr Value at 7%
50% up to 6%$4,800$2,400$241,000
100% up to 3%$4,800$2,400$241,000
100% up to 4%, 50% next 2%$4,800$4,000$401,000
Dollar-for-dollar up to 6%$4,800$4,800$482,000
3

Contribution Strategies by Career Stage

Workers in their 20s should target at least 10–15% of salary, including the employer match. A 25-year-old earning $55,000 who saves 12% ($6,600/year) with a 3% match ($1,650) at 7% returns will accumulate roughly $1.25 million by age 65. Starting at 35 with identical inputs yields about $575,000 — less than half — because compound growth needs time to accelerate.

Mid-career professionals (ages 35–50) often have higher salaries and should aim to maximize or approach the $23,000 annual limit. Catch-up contributions kick in at age 50, adding $7,500 for a combined ceiling of $30,500. If you earned $120,000 and maxed out at $30,500 with a 4% match ($4,800), your annual 401(k) input totals $35,300 — a powerful accelerant for the final 15 years before retirement.

For late starters over 50, aggressive savings combined with catch-up contributions and downsizing expenses can still build a meaningful nest egg. Contributing $30,500/year at 8% for 15 years grows to approximately $878,000. Pair that with Social Security and a paid-off mortgage, and a comfortable retirement remains achievable.

Tip: Increase your contribution rate by 1% with every annual raise. You will not feel the difference in your paycheck, and an extra 1% on a $75,000 salary adds $750/year to your 401(k).

4

Traditional vs Roth 401(k): Choosing Your Tax Strategy

The traditional 401(k) deducts contributions from taxable income now and taxes withdrawals in retirement as ordinary income. A worker in the 24% bracket who contributes $20,000 saves $4,800 in current-year taxes. If their retirement tax bracket drops to 12%, they pay only $2,400 on that same $20,000 withdrawal — saving $2,400 in lifetime taxes per year of contributions.

Roth 401(k) contributions are after-tax, but qualified withdrawals are entirely tax-free. For a 28-year-old currently in the 12% bracket who expects to earn more later, paying 12% on contributions today can be far cheaper than paying 22–24% on withdrawals decades from now. Over 35 years at 7%, $10,000 in Roth contributions grows to roughly $106,000 of completely tax-free wealth.

Many financial advisors recommend splitting contributions between Traditional and Roth for tax diversification. A 50/50 split gives flexibility in retirement: draw from the Traditional account in low-income years (paying minimal tax) and the Roth in high-income years (paying no tax). This approach hedges against unpredictable future tax-rate changes.

FeatureTraditional 401(k)Roth 401(k)
Tax on contributionsPre-tax (lowers AGI)After-tax (no benefit now)
Tax on withdrawalsOrdinary income ratesTax-free if qualified
Best current bracket22%+ (high earners)10–12% (early career)
RMDs at 73RequiredRequired (rollover to Roth IRA to avoid)
2024 limit$23,000 (shared)$23,000 (shared)
5

How to Use This 401(k) Calculator

Start by entering your current 401(k) balance and monthly contribution amount. The calculator projects your balance at retirement using compound monthly growth, factoring in both your contributions and your employer’s matching percentage. The default 7% return reflects a balanced stock-bond portfolio after inflation.

Experiment with scenarios to find your optimal strategy. Increasing your contribution by $100/month (from $500 to $600) at 7% for 25 years adds approximately $81,000 to your final balance. Raising the return assumption from 7% to 8% on $500/month for 30 years adds roughly $195,000 — illustrating how both savings rate and investment returns drive outcomes.

  1. 1

    Enter your current balance

    Check your latest 401(k) statement for the total vested balance. Include rollovers from prior employers.

  2. 2

    Set monthly contribution

    Divide your annual contribution by 12. On a $75,000 salary at 10%, that is $625/month.

  3. 3

    Add employer match percentage

    Enter the match rate (e.g., 50 for a 50% match). Check your plan summary for the exact formula and cap.

  4. 4

    Choose expected return

    Use 7% for conservative estimates, 8–9% for moderate. The S&P 500 has averaged ~10% nominal since 1926.

  5. 5

    Review the growth breakdown

    The results split your balance into contributions, employer match, and investment growth so you can see where your wealth is coming from.

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Last Updated: Mar 26, 2026

This calculator is provided for informational and educational purposes only. Results are estimates and should not be considered professional financial, medical, legal, or other advice. Always consult a qualified professional before making important decisions. UseCalcPro is not responsible for any actions taken based on calculator results.

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