Estimate how much your 401(k) will be worth with your current balance, monthly contributions, employer match, annual growth rate, and years until retirement.
Forecast your retirement balance.
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Adjust your age, salary, contribution, match, and timeline to compare 401(k) outcomes.
401(k) growth comes from three drivers: your current balance compounding, your monthly contributions, and any employer match. The calculator projects each monthly contribution forward using your expected annual growth rate and years until retirement.
Future 401(k) balance = growth on current balance + future value of contributions + future value of employer match
Use this 401(k) estimator to test contribution increases, employer match changes, and conservative vs. optimistic growth assumptions for 10-year, 20-year, and 30-year retirement scenarios.
Search Console queries also call this a 401k plan calculator, 401k value calculator, 401k balance calculator, and 401k contribution calculator. The calculator uses the same inputs for each version: current balance, employee contribution, employer match, growth rate, and time.
| Years | Estimated Balance | Employee + Match Added | Investment Growth |
|---|
A 401(k) calculator is a financial planning tool designed to project the future value of your 401(k) retirement account. It helps you visualize your progress towards your retirement goals by factoring in your current balance, your ongoing contributions, any employer matching funds, and the expected annual growth from your investments. Using a 401k growth forecast like this can make an abstract goal like retirement feel much more concrete and achievable.
Our calculator combines two separate compound interest formulas to give you a complete picture of your nest egg:
The total estimated balance is the sum of these two calculations.
Total Balance = (Part 1) + (Part 2)
Part 1 (Current Balance): FVPV = PV × (1 + r)n
Part 2 (Contributions): FVP = P × [ ((1 + r)n - 1) / r ]
Let's imagine you are starting your retirement planning with the following numbers:
Calculation:
Part 1 (Current Balance):
$50,000 × (1 + 0.005833)300 = $50,000 × 5.726 = $286,300
Part 2 (Contributions):
$600 × [ ((1 + 0.005833)300 - 1) / 0.005833 ] = $600 × [ 4.726 / 0.005833 ] = $486,060
Total Estimated Balance = $286,300 + $486,060 = $772,360
Searchers often ask this because time is the biggest 401(k) variable. The same monthly contribution can produce very different results depending on whether it has 5 years or 30 years to compound. The table below uses a simple example: a $75,000 starting balance, $500 monthly employee contribution, $250 monthly employer match, and 7% expected annual growth.
| Time horizon | Estimated 401(k) balance | Why it matters |
|---|---|---|
| 5 years | About $160,000 | Contributions still drive much of the growth. |
| 10 years | About $281,000 | Compounding starts to noticeably accelerate. |
| 20 years | About $694,000 | Investment growth becomes a major share of the balance. |
| 30 years | About $1.52 million | Long time horizons let repeated contributions compound many times. |
Use the calculator above to replace those assumptions with your real balance, contribution, match, growth rate, and retirement timeline. If you are comparing multiple retirement paths, also test the Retirement Calculator and Annuity Calculator.
A retirement savings calculator is more than just a number generator. It's a key part of your financial decision-making.
When filling out the calculator, here are some common values to consider:
Wondering if your 401(k) is on track? The table below shows approximate average and median 401(k) balances by age, based on recent Vanguard "How America Saves" data for U.S. workers. Median is usually the more realistic benchmark - averages are pulled upward by a small number of very large accounts.
| Age group | Approx. average balance | Approx. median balance |
|---|---|---|
| Under 25 | ~$7,300 | ~$2,800 |
| 25 - 34 | ~$37,200 | ~$14,900 |
| 35 - 44 | ~$97,000 | ~$36,100 |
| 45 - 54 | ~$179,200 | ~$61,600 |
| 55 - 64 | ~$256,200 | ~$89,700 |
| 65+ | ~$272,500 | ~$88,500 |
Figures are approximate U.S. balances from recent industry reports and update annually; treat them as a general reference. Many advisors suggest a target of roughly 1x salary saved by age 30, 3x by 40, 6x by 50, 8x by 60, and 10x by 67.
That depends on your starting balance, monthly contribution, employer match, and annual growth assumption. For example, $75,000 today plus $750 per month at 7% annual growth is roughly $281,000 after 10 years, $694,000 after 20 years, and $1.52 million after 30 years.
Compound the current balance, then add the future value of recurring employee contributions and employer match. The calculator converts annual growth into a monthly rate and compounds across the number of months until retirement.
Start by contributing enough to receive the full employer match. After that, many savers target 10-15% of gross pay if cash flow allows. For 2026, the IRS elective deferral limit is $24,500, with an additional $8,000 standard catch-up contribution for participants age 50 or older and a higher $11,250 catch-up for ages 60-63.
Yes. Enter your employer's monthly match as a dollar amount. The result separates your total contributions, employer match, and investment growth so you can see how much the match changes the final estimate.
No. The growth of your 401(k) depends on the performance of your chosen investments and is subject to market risk. A 7-10% range is often used for long-term stock-heavy scenarios, but no return is guaranteed.
A vesting schedule is the timeline an employee must work to own employer matching contributions. Your own contributions are always yours, but unvested employer match may be forfeited if you leave before the vesting period is complete.
Planning for retirement is a marathon, not a sprint. Use this 401k growth forecast to set your goals, and explore our full suite of retirement and investment calculators to build a comprehensive financial plan.
Want the background and formulas behind this calculator? Read the companion guide.
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