How does employer match work in a 401(k) calculator?

Employer match is added on top of your contributions, usually based on a percent of salary up to a limit. The calculator applies your match settings to estimate the extra amount added each year.

What does "match limit" mean in a 401(k) plan?

It's the maximum portion of your salary your employer will match. If your limit is 6%, contributions above 6% may not receive extra matching.

Should I use inflation in a 401(k) Calculator?

Yes, if you want a clearer picture of purchasing power. Inflation-adjusted results help you compare future money to what money buys today.

What is a realistic expected annual return to enter?

It depends on your investments and risk level. Many people test multiple scenarios (conservative, moderate, and optimistic) to see a range of outcomes.

Can this calculator tell me how much income I'll have in retirement?

This tool focuses on projecting account growth. To estimate retirement income, you'd usually combine your projected balance with a withdrawal plan and other income sources.

How often should I recalculate my 401(k) projection?

A good habit is once or twice a year, and anytime your salary, contribution rate, or job (and match rules) change.

What if my salary changes a lot over time?

Use the salary increase input as an estimate. If your career path is uneven, run multiple scenarios with different raise assumptions.

Does the calculator include fees from 401(k) investments?

Many simple projections do not subtract fees unless stated. If you expect fees, you can model them by slightly reducing the expected return.

What's the difference between "future dollars" and "today's dollars"?

Future dollars show the raw projected balance. Today's dollars adjust for inflation to estimate what that future balance may be worth in current buying power.

How do I compare increasing contributions versus retiring later?

Run two side-by-side scenarios. Change only one input at a time (contribution percent or retirement age) to see which has a bigger impact for you.

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

You have several options: leave the balance in your former employer's plan (if allowed), roll it over to your new employer's 401(k), roll it over to an individual IRA, or cash it out. Cashing out triggers ordinary income taxes plus a 10% early withdrawal penalty if you are under 59½. Rolling it over preserves the tax-deferred growth and avoids immediate taxes. See [IRS guidance on 401(k) rollovers](https://www.irs.gov/retirement-plans/plan-participant-employee/rollovers-of-retirement-plan-and-ira-distributions).

Can I contribute to both a 401(k) and an IRA?

Yes. Contributing to a 401(k) does not prevent you from also contributing to a traditional or Roth IRA, subject to the IRA annual limits ($7,000 for 2025; $8,000 if you are 50 or older) and income phase-outs for Roth eligibility. See [IRS IRA contribution limits](https://www.irs.gov/retirement-plans/plan-participant-employee/retirement-topics-ira-contribution-limits).

What is the penalty for early 401(k) withdrawal?

Withdrawals before age 59½ are subject to ordinary income tax plus a 10% early withdrawal penalty, with some exceptions (disability, certain medical expenses, substantially equal periodic payments under Rule 72(t)). See [IRS early distribution exceptions](https://www.irs.gov/retirement-plans/plan-participant-employee/retirement-topics-exceptions-to-tax-on-early-distributions).

How does employer matching work?

If your employer offers a 50% match up to 6% of salary, that means for every dollar you contribute — up to 6% of your pay — your employer adds 50 cents. On a $60,000 salary with 6% contribution ($3,600/year), the employer adds $1,800/year. Always contribute at least enough to capture the full match; it is effectively a guaranteed 50%–100% instant return on that portion of your savings.

What return rate should I use?

A commonly used planning assumption for a diversified stock/bond portfolio is 6%–7% nominal annual return. The S&P 500 has averaged roughly 10% annually before inflation over long periods, but past performance does not guarantee future results. For a conservative plan, model 5%–6%; for an optimistic scenario, model 8%–9%. Running the calculator at multiple return rates gives you a range rather than a single number to rely on. --- This calculator helps you see how your 401(k) may grow based on your age, salary, contributions, employer match, and investment returns. Pair it with our [Inflation Calculator](/finance/inflation-calculator) to see how purchasing power changes over time, and our [Social Security calculator](/finance/social-security) to estimate when to begin benefits. Results are illustrative estimates — not financial advice.

401(k) Calculator – Estimate Your Retirement Balance

This calculator estimates how your 401(k) balance may grow from today until retirement. It combines your current age, salary, existing 401(k) balance, and contribution rate with employer matching and expected investment returns. It also lets you include salary raises and inflation, so you can view results in future dollars and "today's dollars." This tool helps employees who want a clearer retirement target, anyone comparing different contribution rates, and people deciding whether to retire earlier or later. The result you get is a projected balance at retirement (and often a breakdown of contributions, match, and growth).

How to Use This Calculator

Enter your current age.
Add your current annual salary and your current 401(k) balance.
Set your contribution percent (how much of your salary you contribute).
Enter your employer match percent and match limit (if your employer offers one).
Choose your retirement age and life expectancy (for planning how long money may need to last).
Add annual salary increase, expected annual return, and inflation rate.
Click Calculate to see your projected results.
Adjust one input at a time (like contribution rate or retirement age) to compare scenarios.

What This Calculator Measures

This 401(k) calculator projects the future value of your retirement account based on the information you enter.

Key terms in simple language:

401(k) balance: The money currently in your 401(k).
Contribution percent: The share of your salary you put into the plan.
Employer match: Extra money your employer adds when you contribute.
Match limit: The maximum salary percent your employer will match.
Expected annual return: Your estimated investment growth rate each year.
Salary increase: The yearly raise you expect, which can increase contributions over time.
Inflation rate: How much prices rise over time; it reduces future buying power.
Retirement age: When you plan to stop working and contributing.

Formula or Logic (Easy Explanation)

The calculator works like a year-by-year forecast:

It starts with your current 401(k) balance.
Each year, it adds your employee contributions (based on salary × contribution percent).
If you have a match, it adds employer contributions (based on match rules and limits).
Then it applies investment growth to the total (using your expected return).
It repeats this process until your retirement age.
If inflation is included, it also shows what that future amount may be worth in today's dollars.

Example Calculations

Example 1: Early career saver with an employer match

Current age: 25 | Salary: $55,000 | Current balance: $5,000
Contribution: 8% | Employer match: 50% up to 6% | Retirement age: 65
Salary increase: 3% | Expected return: 7% | Inflation: 2.5%

Illustrative output: Projected balance at 65 ≈ $1.15 million (~$620K in today's dollars after inflation). Of that, roughly $280K from your contributions, $120K from employer match, and $750K from investment growth — showing how compounding does the heavy lifting over 40 years.

Example 2: Mid-career catch-up through higher contribution

Current age: 40 | Salary: $95,000 | Current balance: $120,000
Contribution: 12% | Employer match: 100% up to 4% | Retirement age: 67
Salary increase: 2% | Expected return: 6% | Inflation: 2.5%

Illustrative output: Projected balance at 67 ≈ $980,000 (~$560K in today's dollars). The larger existing balance and higher contribution rate partially offset the shorter time horizon.

Example 3: Comparing retirement ages (same inputs as Example 2)

Scenario A: retire at 62 → projected balance ≈ $690,000
Scenario B: retire at 67 → projected balance ≈ $980,000

Five extra years of contributions and compounding adds roughly $290,000 — about 42% more — illustrating why even a few extra working years can significantly change your retirement picture.

Understanding Your Results

Your results usually include:

Projected balance at retirement: The total amount you may have by your retirement age.
Total contributions: What you put in from paychecks over the years.
Employer match total: What your employer may add (if applicable).
Investment growth: The increase from compounding returns over time.
Inflation-adjusted value (if shown): A "today's dollars" view that helps you judge buying power.

If your projected balance feels low, the biggest levers are usually:

Increasing your contribution percent
Capturing the full employer match
Extending your time to retirement
Using more conservative or more realistic return and inflation assumptions

Annual Contribution Limits

The IRS sets annual limits on how much you can contribute to a 401(k), and these limits are adjusted periodically for inflation. For 2025, the employee elective deferral limit is $23,500 (up from $23,000 in 2024). Employees aged 50 or older may contribute an additional $7,500 in standard catch-up contributions, bringing their total to $31,000. Under the SECURE 2.0 Act, those aged 60–63 are eligible for an enhanced catch-up of $11,250 instead, for a total of $34,750 in 2025.

Employer contributions are counted separately, but total annual additions from all sources (employee + employer) are capped at the lesser of 100% of compensation or $70,000 for 2025.

The IRS typically announces updated limits each October or November. Always confirm the current-year figures at the IRS retirement topics page or IRS Publication 560 before making contribution decisions. This calculator does not enforce contribution limits — treat the output as a planning estimate and verify limits separately.

Common Mistakes to Avoid

Entering a match rate but forgetting the match limit.
Using an overly optimistic expected return without testing a conservative case.
Leaving salary increase at 0% when you expect raises.
Ignoring inflation, then overestimating real buying power.
Confusing contribution percent with a fixed dollar amount.
Forgetting to update inputs after a job change or pay increase.
Assuming results are guaranteed (they are estimates, not promises).
Setting retirement age without considering how long savings may need to last.

Traditional vs. Roth 401(k)

Many employers now offer both a traditional and a Roth 401(k) option. The contribution limits above apply to the combined total across both account types.

Traditional 401(k): Contributions are pre-tax, reducing your taxable income now. Withdrawals in retirement are taxed as ordinary income.
Roth 401(k): Contributions are made after tax. Qualified withdrawals in retirement — including investment growth — are tax-free.

This calculator models traditional pre-tax contributions. If your employer offers a Roth option and you expect to be in a higher tax bracket in retirement, the after-tax comparison may favour Roth. Consult your plan documents or a financial advisor for a personalised analysis.

401(k) Calculator

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