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Retirement Shortfall Calculator

Find the gap between projected retirement savings and what you need, and the extra saving or later retirement to fix it.

Enter values

Results update as you type.

Result

Shortfall

$350,000.00

Extra monthly saving
$671.88
Lump sum needed today
$86,660.72

About the Retirement Shortfall Calculator

Find the gap between projected retirement savings and what you need, and the extra saving or later retirement to fix it.

Also known as: retirement gap, retirement savings gap, behind on retirement.

How to use this calculator

  1. Enter projected savings at retirement, savings needed, years to retirement, return.
  2. The result updates instantly as you type — press Calculate (or Enter) at any time.
  3. Review the breakdown shown under the main result.
  4. Use Copy result or Share to save the answer or send a link with your inputs.

Formula

Extra PMT = gap × r / ((1 + r)ⁿ − 1)

Worked example

Using the values pre-filled in the calculator above:

  • Projected savings at retirement = 650,000
  • Savings needed = 1,000,000
  • Years to retirement = 20
  • Return = 7 %

the calculator returns:

  • Shortfall: 350,000
  • Extra monthly saving: 671.88
  • Lump sum needed today: 86,660.72