Does the calculator account for the employer match contribution limit?

The model adds the employer match as a fixed percentage of your annual contribution. In reality, employer matches are also subject to the overall annual addition limit (Section 415 limit, $69,000 in 2024 combined employee+employer). For most employees this limit is not reached, but high earners should verify.

Should I use pre-tax or Roth contributions in the calculator?

The calculator models tax-deferred (traditional) 401(k) growth. Roth 401(k) contributions grow identically inside the account but withdrawals are tax-free. The ending balance figure is the same either way; the difference is whether taxes are paid now or at retirement.

What annual return should I use?

A commonly used long-run nominal return for a diversified equity portfolio is 7-10%. Adjusting for inflation, a 5-7% real return is typical. Choose a rate that reflects your expected asset allocation -- a bond-heavy portfolio warrants a lower figure.

401(k) Retirement Savings Calculator

Estimate the future value of your 401(k) account based on your contributions, employer match, years until retirement, and expected annual return.

By AbraCalc Editorial Team · Reviewed by AbraCalc Methodology Review · Last reviewed: 2026-06-25

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How to use this tool

Enter current age, retirement age, current 401(k) balance, your annual contribution, annual employer match and expected annual return in the fields above.
Results update instantly as you type — or click Calculate.
Read your estimated 401(k) balance at retirement and the full breakdown beneath it.

⚠ This tool provides general estimates for education only and is not financial, tax or legal advice. Figures may not reflect your situation — verify with a qualified professional.

Formula

Future value of existing balance: FV_balance = B × (1 + r)ⁿ

Future value of annual contributions (ordinary annuity): FV_{contributions} = C × [(1 + r)ⁿ − 1] / r

Total: FV = FV_balance + FV_{contributions}

where C = your annual contribution + employer match, r = annual return rate, n = years to retirement.

How it works

This calculator uses standard compound interest formulas to project your 401(k) balance at retirement. The existing balance grows at the expected annual return rate, while annual contributions (yours plus any employer match) are treated as an ordinary annuity — payments made at the end of each year — and compounded forward to retirement.

The expected annual return is assumed constant over the entire investment horizon, which simplifies the calculation but does not capture market volatility. Actual results will vary. This tool does not account for taxes on withdrawals or inflation.

Worked example

Age 30 to 65, $10,000 own + $1,500 employer match, 7% return, $0 starting balance

Years to retirement n = 65 − 30 = 35. Total annual contribution C = $10,000 + $1,500 = $11,500.
Annual return r = 7% = 0.07. Existing balance = $0, so FV_balance = $0.
FV of contributions = 11,500 × [(1.07)^35 − 1] / 0.07. (1.07)^35 ≈ 10.6766.
FV = 11,500 × (10.6766 − 1) / 0.07 = 11,500 × 138.237 ≈ $1,589,726.

Estimated 401(k) balance at retirement ≈ $1,589,726.

Common mistakes to avoid

Not accounting for the annual IRS contribution limit — in 2024 the elective deferral limit is $23,000 ($30,500 for those 50+); entering a contribution amount that exceeds the limit produces an unrealistic projection.
Using a single average return without considering sequence-of-returns risk — a 7% average can result in very different ending balances depending on when market downturns occur, especially in the final decade before retirement.
Ignoring the employer match vesting schedule — many matches vest over 3-6 years; treating unvested employer contributions as guaranteed overstates the account value if you leave the employer early.

Key terms

401(k): An employer-sponsored retirement savings plan that allows employees to contribute pre-tax or Roth (after-tax) dollars, with potential employer matching contributions.
Employer Match: Additional contributions made by the employer to an employee's 401(k), typically a percentage of the employee's own contributions up to a salary limit.
Compound Growth: The process by which investment returns are reinvested, causing the principal to grow exponentially over time.
Ordinary Annuity: A series of equal payments made at the end of each period, used here to model annual 401(k) contributions.

Frequently asked questions

Does the calculator account for the employer match contribution limit?: The model adds the employer match as a fixed percentage of your annual contribution. In reality, employer matches are also subject to the overall annual addition limit (Section 415 limit, $69,000 in 2024 combined employee+employer). For most employees this limit is not reached, but high earners should verify.
Should I use pre-tax or Roth contributions in the calculator?: The calculator models tax-deferred (traditional) 401(k) growth. Roth 401(k) contributions grow identically inside the account but withdrawals are tax-free. The ending balance figure is the same either way; the difference is whether taxes are paid now or at retirement.
What annual return should I use?: A commonly used long-run nominal return for a diversified equity portfolio is 7-10%. Adjusting for inflation, a 5-7% real return is typical. Choose a rate that reflects your expected asset allocation -- a bond-heavy portfolio warrants a lower figure.