US retirement calculator
Retirement Calculator
Estimate how your retirement savings may grow over time using your current age, planned retirement age, current savings, monthly contribution and expected annual return.
This calculator is designed for educational retirement planning. It can help you compare scenarios, understand how time affects growth and see how regular contributions may influence your future balance.
Retirement estimate summary
Based on the inputs above, this estimate assumes you have 37 years until retirement and continue contributing $500.00 per month.
| Years until retirement | 37 |
|---|---|
| Current retirement savings | $25,000.00 |
| Monthly contribution | $500.00 |
| Annual contribution | $6,000.00 |
| Total contributions over time | $247,000.00 |
| Estimated investment growth | $1,132,018.29 |
| Estimated retirement balance | $1,379,018.29 |
| Average contributed amount per year | $6,675.68 |
Growth comparison by time
The same savings plan can produce very different estimates depending on time. This comparison uses your current savings, monthly contribution and expected annual return.
| Time invested | Estimated balance | Total contributions | Estimated growth |
|---|---|---|---|
| 10 years | $136,783.94 | $85,000.00 | $51,783.94 |
| 20 years | $361,431.80 | $145,000.00 | $216,431.80 |
| 30 years | $812,897.93 | $205,000.00 | $607,897.93 |
How this retirement calculator works
This calculator uses compound growth to estimate a future retirement balance. It combines your current retirement savings, monthly contributions, years until retirement and expected annual return.
The formula assumes monthly contributions are added consistently and that the expected return compounds monthly. Real investment returns do not usually happen in a smooth line, so the output should be treated as a planning estimate rather than a prediction.
Why starting early matters
Time is one of the most important factors in retirement planning. Starting earlier may give contributions and investment growth more years to compound. Waiting longer can require larger monthly contributions to reach a similar estimated balance.
Why monthly contributions matter
Regular contributions can be just as important as the starting balance. A higher monthly contribution increases the amount you put toward retirement and gives more money the opportunity to grow over time.
What annual return should you use?
The expected annual return is only an assumption. Lower return assumptions can be useful for conservative planning, while higher assumptions may show a more optimistic scenario. Actual returns can be higher or lower than the number you enter.
Retirement balance is not the same as retirement income
This calculator estimates a future savings balance. It does not calculate how much income that balance may provide in retirement, how long the money may last, Social Security benefits, pensions, taxes, required withdrawals or healthcare costs.
Example retirement scenario
For example, if someone is age 30, plans to retire at age 67, has $25,000.00 saved and contributes $500.00 per month, this calculator estimates a future balance of about $1,379,018.29 using a 7% expected annual return.
Frequently asked questions
Is this retirement calculator exact?
No. It is a simplified educational estimate. Actual retirement results may vary based on investment returns, fees, inflation, taxes, contribution changes, account type, withdrawals and future market performance.
Does this calculator include inflation?
No. The result is shown in future dollars based on the return assumption entered. Inflation can reduce purchasing power over time, so users may want to test lower return assumptions or consult a qualified professional for more detailed planning.
Does this include taxes?
No. The calculator does not estimate tax treatment for traditional retirement accounts, Roth accounts, taxable accounts, withdrawals, required distributions or early withdrawal penalties.
Can I use this for 401(k), IRA or brokerage planning?
You can use it as a simplified growth estimate, but it does not include account-specific rules, contribution limits, employer match, tax treatment, vesting schedules or withdrawal rules.
Important limitations
This retirement calculator provides educational estimates only. It is not financial, tax, investment, retirement, legal or accounting advice. It does not guarantee future returns or retirement readiness.
Before making major retirement decisions, consider reviewing your situation with a qualified professional who can consider income, taxes, account types, risk tolerance, fees, inflation, Social Security, healthcare costs and retirement goals.