Retirement Savings Calculator

This retirement savings calculator shows how much your nest egg could grow by the day you retire. Enter your age, current savings, monthly contribution, and an expected return.

The calculator above then projects your balance and estimates your first-year monthly income. Use it to answer one question: am I saving enough?

$1,515,193 savings at retirement$5,051 monthly income (4% rule)$1,091,193 investment growth
Interactive — edit any field

How it's calculated

The calculator above grows your current savings and future contributions at a fixed annual return until your chosen retirement age. It then applies the 4% rule to estimate a safe yearly withdrawal, which it shows as monthly income.

Two numbers here are assumptions, not promises. The return is a single fixed rate, so real markets will vary year to year. The 4% safe-withdrawal rate is a common planning guideline, not a guarantee. Treat the result as a planning estimate and update it as your savings change. To model a workplace plan specifically, use the 401k calculator. Want to see the underlying formulas yourself? Our retirement calculator spreadsheet template rebuilds this same compound-growth math cell by cell in Google Sheets.

A worked example

Say you are 40, plan to retire at 67, and have $100,000 saved today. You add $1,000 a month and assume a 7% annual return.

The calculator projects $1,515,193 at retirement. Of that, your $100,000 starting balance and $324,000 in contributions over 27 years are the money you put in, while investment growth adds $1,091,193.

Notice the gap: growth dwarfs the money you put in, thanks to compounding. At the 4% rule, that balance supports about $5,051 a month in first-year retirement income.

Common mistakes to avoid

Frequently asked questions

How does this retirement savings calculator work?

This retirement savings calculator grows your current balance and monthly contributions at a fixed annual return until your retirement age. It then applies the 4% rule to estimate your first-year monthly income. The return and withdrawal rate are assumptions, so the result is a planning estimate.

What is the 4% rule?

The 4% rule is a guideline that you can withdraw about 4% of your savings in your first year of retirement. The calculator uses it to estimate monthly income. It is a planning assumption, not a guarantee, because market returns and spending vary.

Why is investment growth larger than what I contribute?

Compounding does the heavy lifting over long periods. In the example above, a $100,000 starting balance plus $324,000 in contributions grows into $1,515,193, with $1,091,193 of that coming from growth alone. The longer your money stays invested, the more this gap widens.

When must I start withdrawing from these accounts?

Age 73 for traditional IRAs and 401(k)s, under the IRS required minimum distribution rules. Roth IRAs are exempt for the owner. Estimate your first required withdrawal with our RMD calculator.

What if real returns are lower than my estimate?

Then your actual balance will be smaller than the projection. The calculator uses one fixed return, but real markets rise and fall. Poor returns early in retirement, called sequence-of-returns risk, can hurt most. Revisit your plan and contributions often.

Does this retirement calculator account for inflation?

The calculator uses a nominal return rate that you supply, so it does not automatically strip out inflation. To think in today's dollars, subtract the inflation rate from your expected return. For example, if you expect a 7% nominal return and 3% inflation, enter 4% as your rate. The calculator will then show your projected balance in today's purchasing power. Alternatively, use the nominal rate and remember the final balance will be worth less in real terms — the Federal Reserve targets 2% annual inflation as a long-run benchmark.

Can this calculator handle an employer match, a one-time contribution, or multiple accounts?

Yes. Model an employer match by adding it directly into the monthly contribution field, since the calculator treats your monthly contribution as one combined deposit rather than separating your dollars from your employer's. For a one-time lump-sum contribution — a bonus, an inheritance, a rollover — add it to the current savings field rather than spreading it across future months, since the calculator compounds your starting balance from day one. If you're combining multiple accounts, such as a 401(k), an IRA, and a taxable brokerage account, add all their current balances together for 'current savings' and all their combined monthly contributions together for the most accurate total projection.

Does it matter if my contributions are Roth or traditional?

Not for the balance itself — a dollar contributed compounds the same way whether it sits in a Roth or a traditional account, since both grow at the same assumed return. What differs is when you pay tax: traditional contributions go in pre-tax and are taxed as ordinary income on withdrawal, while Roth contributions are taxed now and grow tax-free, including on qualified withdrawals. That tax-timing difference can change your real spendable income in retirement even with an identical projected balance. See our Roth IRA vs. Roth 401(k) comparison for how the two Roth account types differ from each other.

How much do I need to save for retirement?

A widely cited benchmark from Fidelity Investments is to have saved 1x your annual salary by age 30, 3x by 40, 6x by 50, 8x by 60, and 10x by age 67 — aimed at supporting your pre-retirement lifestyle if you save consistently and stay invested in a mix of stocks and bonds. These are aspirational milestones, not a guarantee, and your actual number depends on your planned retirement age, desired lifestyle, and other income like Social Security or a pension. Run your own current savings, contributions, and target age through the calculator above to see whether you're tracking ahead of or behind that kind of benchmark.

Sources

We prioritize primary sources for rules, formulas, rates, limits, and definitions. See our calculator methodology and editorial policy.

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