Retirement Income Gap Calculator

Find out whether your retirement income sources will cover your desired spending. Enter your expected Social Security, pension, savings, and other income below to see your monthly surplus or shortfall — plus strategies to close any gap.

Age you plan to retire (50–80)
Plan conservatively — consider family history
Check ssa.gov/myaccount or use our SS estimator
Enter 0 if no pension
401(k), IRA, and other invested savings
Conservative estimate in retirement
Rental income, part-time work, annuities, etc.
Total monthly spending goal in retirement

How to Estimate Your Retirement Income Gap

Your retirement income gap is the difference between what you expect to receive from all income sources and what you plan to spend. A positive gap (surplus) means you have more income than you need, while a negative gap (shortfall) means you'll need to make adjustments to avoid running out of money.

Start by listing every income source: Social Security, pensions, retirement account withdrawals, rental income, part-time work, and annuities. Then compare that total against your expected monthly spending — housing, food, healthcare, transportation, insurance, leisure, and any other expenses.

The 4% Rule and Sustainable Withdrawal Rates

The 4% rule suggests you can withdraw 4% of your portfolio in year one of retirement, then adjust for inflation, with a reasonable chance your money lasts 30 years. This calculator uses a more precise annuity formula that accounts for your specific investment return rate and exact years in retirement, giving you a sustainable withdrawal amount tailored to your situation.

Strategies to Close a Retirement Income Gap

  • Delay retirement: Each additional working year means more savings, higher Social Security benefits, and fewer years to fund.
  • Reduce spending: Identify discretionary expenses you can trim. Even small reductions compound over a 20–30 year retirement.
  • Save more before retirement: Increase 401(k) or IRA contributions now to build a larger portfolio.
  • Work part-time in retirement: Even modest part-time income can significantly close a gap.
  • Downsize housing: Selling a larger home can free up equity and reduce ongoing housing costs.

Why Life Expectancy Matters

Longevity risk — the risk of outliving your savings — is one of the biggest threats to retirement security. Planning to age 90 or beyond is prudent. If your family has a history of longevity, consider planning to 95 or even 100. It's far better to have money left over than to run out at age 85.

Inflation Considerations

This calculator uses nominal returns (not adjusted for inflation). In practice, inflation erodes purchasing power over time. A 5% nominal return with 3% inflation yields roughly a 2% real return. Social Security benefits receive annual cost-of-living adjustments (COLAs), but pensions and fixed income sources typically do not. Consider whether your income sources will keep pace with rising costs.

Assumptions & Limitations

  • Investment returns are assumed constant — actual returns vary year to year.
  • Income sources are assumed fixed — Social Security COLAs and benefit changes are not modeled.
  • Taxes are not included — your actual after-tax income will be lower depending on your tax situation.
  • Healthcare costs are not broken out — these tend to increase significantly with age.
  • Inflation is not separately modeled — the return rate should be thought of as a real (inflation-adjusted) return or compared against nominal spending.
Disclaimer: This calculator is for educational and illustrative purposes only and does not constitute financial advice. Results are hypothetical projections based on the inputs you provide. Actual investment returns, inflation, taxes, and your personal circumstances will differ. Consult a qualified financial advisor before making retirement planning decisions.

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