Retirement Savings Calculator

Enter your age and monthly contribution to see how much you will have when you retire.

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Results

Savings at retirement
$1,130,650.34
In today’s money
$401,814.36
Monthly income in today’s money (4% rule)
$1,339.38
Total contributed
$230,000.00
Years to retirement
35

Return and inflation are assumed constant; real results will differ. The 4% rule is a rough guide that assumes withdrawing 4% of the pot a year is sustainable over a long retirement.

Retirement planning comes down to two questions: how much will you have saved by then, and what will that money buy? The second is often forgotten — a million in thirty years is not a million today.

The calculator grows your savings at the return you expect, then strips out inflation to show the result in today’s money. It also estimates the monthly income you could draw using the 4% rule.

How to calculate Retirement savings

  1. Enter your current age and the age you plan to retire.
  2. Enter your current savings and monthly contribution.
  3. Enter the expected annual return and inflation; read the result in today’s money too.

Retirement savings formula

  • Balance = savings × (1 + i)ⁿ + contribution × ((1 + i)ⁿ − 1) ÷ i
  • In today’s money = balance ÷ (1 + inflation)^years
  • Monthly income (4% rule) = balance × 0.04 ÷ 12

Retirement savings example

A 30-year-old with 20,000 saved who adds 500 a month at a 7% return reaches about 1,130,650 at 65. With 3% inflation that is 401,814 in today’s money — roughly 1,339 a month under the 4% rule.

Retirement savings: common questions

What is the 4% rule?

A rule of thumb suggesting that withdrawing 4% of your pot each year should make it last around 30 years. It is not guaranteed and depends on returns and inflation.

What return should I assume?

Past returns do not guarantee future ones. Pick a cautious figure a few points above inflation.

Does it include employer contributions?

Not separately. Add any employer match to your monthly contribution to include it.