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Financial Planning

Retirement Savings Calculator

Project retirement savings from current balance, monthly contributions, expected return, contribution increases and inflation.

Your inputs

Results

Projected balance at retirement

$1,483,187.52

In today's money (inflation-adjusted)
$624,972.31
Total contributions
$336,000.00
Investment growth
$1,097,187.52
Illustrative first-year income at a 4 % withdrawal rate (today’s money)
$24,998.89

≈Estimate based on the stated model and assumptions

Notes for this result

  • Returns are assumed constant every year. Real markets fluctuate, so treat this as one scenario, not a forecast.

Inputs are never added to links for financial, salary or health calculators.

What this calculator does

This tool projects how a retirement account could grow until your chosen retirement age and shows the result in today’s money, so you can judge what it would actually buy.

Formula and method

Monthly rate i = (1 + annual return)^(1/12) − 1. Each month: balance = balance × (1 + i) + contribution; contributions rise by the chosen percentage each year. Real value = nominal balance ÷ (1 + inflation)^years.

Worked example

Calculated by this tool with its default inputs:

Inputs

  • Current age: 30
  • Retirement age: 65
  • Current retirement savings: 50000 (any currency)
  • Monthly contribution (incl. employer): 800 (any currency)
  • Annual increase in contributions: 0 %
  • Expected annual return: 6 %
  • Expected inflation: 2.5 %

Results

  • Projected balance at retirement: 1,483,187.52
  • In today's money (inflation-adjusted): 624,972.31
  • Total contributions: 336,000
  • Investment growth: 1,097,187.52
  • Illustrative first-year income at a 4 % withdrawal rate (today’s money): 24,998.89

How to read the results

The inflation-adjusted figure is the most useful for planning. The 4 % figure is an illustrative first-year withdrawal, not a guarantee of sustainable income.

Assumptions and limitations

  • Uses a constant return every year; real markets fluctuate.
  • Taxes, fees and employer-plan rules are not modelled.
  • Results are estimates for planning and education, not individual financial advice.

Financial results are estimates based on the inputs and assumptions shown. They are not financial advice; confirm figures with your lender, provider or a qualified adviser before making decisions.

Questions

What return should I assume?

Use a conservative long-run figure appropriate to your investment mix, and test lower values to see the range of outcomes.

Methodology and verification

Result type
Estimate based on the stated model and assumptions
Formula version
1.0
Automated verification
3 reference and validation test cases, checked against independently computed values. The site cannot be built if any of them fail.
Editorial review
Awaiting human editorial review. The explanation was drafted with AI assistance; the formula and examples are verified by the automated tests above.

Privacy

Everything you enter is calculated in this browser and is not sent to Numerith or anyone else. Because this calculator can involve personal financial or health details, your inputs are never added to share links or saved to history. Privacy policy