Retirement Calculator
Project how your current savings and monthly deposits may grow by retirement, then see the result in today's dollars after inflation.
- Zero dependencies
- Accessible form structure
- Mobile responsive layout
- Validation and edge-case handling
Calculator
Results
Ready to calculate
Enter your figures and press Calculate. Results update instantly in your browser.
Frequently asked questions
When should I retire?
Your ideal retirement age depends on savings, health, lifestyle goals, and expected income sources. This calculator helps you test different ages and compare the trade-offs.
How much do I need for retirement?
A common planning shortcut is to target enough assets to cover annual spending with a sustainable withdrawal rate, but your own number depends on expenses, taxes, healthcare, and other income.
401(k) vs IRA?
A 401(k) is employer-sponsored and may include matching contributions. An IRA is opened by the individual and often offers broader investment choice.
How does inflation affect retirement?
Inflation reduces future buying power. A balance that looks large in nominal dollars may buy much less decades from now, which is why this page also shows an inflation-adjusted estimate.
What are catch-up contributions?
Many retirement accounts let older savers contribute extra above the standard annual limit once they reach a certain age, helping them accelerate savings late in their career.
How does Social Security fit in?
Social Security can reduce the amount you need to draw from savings, but benefits vary by earnings history and claiming age. Treat it as one part of a larger retirement plan.
Understanding Your Retirement Calculator Results
The 4% Rule and Sustainable Withdrawals
A common planning benchmark is the 4% rule, which comes from the Trinity Study: a diversified portfolio of stocks and bonds has historically supported annual withdrawals of 4% of its initial value for at least 30 years without depleting the balance. If you need $60,000 per year in retirement, the rule suggests targeting a portfolio of $1.5 million ($60,000 ÷ 0.04).
The 4% rule is a guideline, not a guarantee. Sequence-of-returns risk (retiring just before a major market downturn), unexpectedly long lifespans, or higher-than-average expenses can strain even well-funded portfolios. Many planners now recommend a 3.0%–3.5% withdrawal rate for retirements expected to last 35 or more years.
Roth vs. Traditional: Which Account Is Better?
Traditional accounts (401k, Traditional IRA) reduce your taxable income today but require you to pay ordinary income tax on every dollar you withdraw in retirement. Roth accounts (Roth 401k, Roth IRA) offer no upfront deduction but allow qualified withdrawals — including decades of investment growth — completely tax-free.
A useful rule of thumb: if you expect to be in a higher tax bracket in retirement than you are today, Roth is generally favored. If you expect your bracket to be lower in retirement, Traditional wins. Many financial planners recommend contributing to both to maintain tax diversification — the flexibility to draw from different buckets based on your tax situation each year.
Why Employer Match Is Always Priority One
If your employer offers a 401(k) match — commonly 50%–100% of contributions up to 3%–6% of your salary — that match is an immediate 50%–100% return on your contribution before any market returns. No other investment reliably offers that. Always contribute at least enough to capture the full match before directing money elsewhere.
The Power of Starting Early: A Real Example
Consider a 35-year-old with $25,000 already saved who contributes $500 per month into a diversified portfolio earning a 7% average annual return. By age 65, they will have contributed about $205,000 in new money. With compound growth, the projected balance is approximately $906,000 — more than four times total contributions. The $700,000 difference is entirely from compounding.
Starting just five years earlier, at age 30 with the same inputs, pushes the balance past $1.3 million. Those five extra years are worth roughly $400,000 — equivalent to decades of additional contributions.
Frequently Asked Questions
What This Calculator Estimates
This calculator projects how your retirement savings may grow between your current age and retirement age. It combines your starting balance, monthly contributions, expected annual return, and inflation assumption to show both a future account value and an inflation-adjusted estimate.
Formula / Method Used
The page converts the annual return to a monthly rate, compounds the current savings over the full number of months to retirement, and adds the future value of monthly deposits. It then estimates buying power by dividing the future balance by the inflation factor over the same number of years.
Worked Example
Using the default example of age 35, retirement at 65, current savings of $25,000, monthly deposits of $500, annual return of 7%, and inflation of 3%, the calculator projects a future balance and then converts that figure into today's dollars. This helps you compare the headline balance with its likely spending power.
What the Result Means
The projected balance is the nominal future account value if your assumptions hold. The inflation-adjusted figure is often the more practical planning number because it reflects what the balance may buy in today's terms. Total contributions show how much you added directly, while estimated growth shows what compounding contributed.
Common Mistakes
- Using an overly optimistic return assumption and treating it as guaranteed.
- Ignoring inflation and focusing only on the larger nominal balance.
- Assuming the result includes taxes, employer match limits, or Social Security.
- Forgetting to revisit the projection after contribution or income changes.
Official References
For retirement account contribution rules and catch-up limits, review current IRS guidance. For estimated Social Security benefits and claiming rules, review your account information from the Social Security Administration. Verify current rates and limits with the official government source.
Related Calculators
Frequently Asked Questions
What does the Retirement Calculator estimate?
It projects a future retirement balance using your current savings, monthly deposits, annual return, time to retirement, and inflation assumption.
Does this retirement calculator include Social Security or a pension?
No. The calculator estimates investment growth only and does not add Social Security, pension income, or account-specific contribution limits.
Why does the calculator show an inflation-adjusted value?
Inflation-adjusted value estimates what the future balance may be worth in today's dollars so you can compare purchasing power more realistically.
What annual return should I use?
Many people test a conservative range such as 5 percent to 7 percent, then compare it with a lower-return scenario to see how sensitive the outcome is.
When should I update my retirement projection?
Update it whenever your savings rate, retirement age, expected return, or inflation assumption changes.
General Disclaimer
This calculator is an educational estimate, not investment, tax, or retirement planning advice. Actual results depend on market returns, account fees, taxes, contribution limits, inflation, and withdrawal strategy. Review important retirement decisions with a qualified professional.
Last updated: May 22, 2026