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Retirement Calculator

Find how much you need to retire, how much to save, how much you can withdraw and how long your savings will last.

Change the values and press Calculate to work out your own figures.

How much you need

Enter your age, income, the income you'll need and your savings.

Your age now.
When you stop working.
Age to plan to.
Before tax.
A % of your income then, or an amount a year in today's money.
How you give it.
Before tax.
Retirement savings so far.
How you give it.
Changes how amounts are shown, not the math; your choice is remembered on this device.
0 if blank.
For buying power at the end.
Social Security, pension; today's money.
A % of income or an amount.
Result
Needed at retirement
$1,927,731.77
Your savings will reach
$1,098,539.18
Shortfall
$829,192.59
Extra saving a year to close it
$9,123.06
First year's withdrawal
$135,191.84

You'll need $1,927,731.77 at 67; save $9,123.06 more a year to get there.

Show the working
  1. need = Σ yearly withdrawal × (1 + inflation)^k ÷ (1 + return)^k
  2. extra saving = shortfall × r ÷ ((1 + r)^years − 1)

How much to save

Enter your target and savings so far.

Your age now.
When you stop working.
Your target nest egg.
Retirement savings so far.
Before tax.
Changes how amounts are shown, not the math; your choice is remembered on this device.
Result
Save each year
$4,471.33
Or each month
$362.74
Savings now will grow to
$193,601.60

Save $4,471.33 a year (or $362.74 a month) to reach $600,000.00 at 67.

Show the working
  1. saving = shortfall × r ÷ ((1 + r)^years − 1)

How much you can withdraw

Enter your savings, contributions, return and inflation.

Your age now.
When you stop working.
Age to plan to.
Retirement savings so far.
Before tax.
Changes how amounts are shown, not the math; your choice is remembered on this device.
Added once a year.
Added each month.
For buying power at the end.
Result
Monthly withdrawal
$4,545.83
In today's money
$1,765.31
Savings at retirement
$753,779.31

From 67 to 85 you can withdraw $4,545.83 a month, rising with inflation.

Show the working
  1. withdrawal = savings ÷ Σ (1 + inflation)^years ÷ (1 + monthly return)^months

How long it lasts

Enter your savings, monthly withdrawal and return.

Retirement savings so far.
What you take out each month.
Before tax.
Changes how amounts are shown, not the math; your choice is remembered on this device.
Result
Savings last
15 years 1 month

Withdrawing $5,000.00 a month, your savings last 15 years 1 month.

Show the working
  1. balance = balance × (1 + monthly return) − withdrawal

How to use it

Enter your age, income, the income you'll need and your savings. Enter your target and savings so far. Enter your savings, contributions, return and inflation. Enter your savings, monthly withdrawal and return.

Enter amounts without commas or with them; rates are percentages (5 for 5%). Negative amounts are allowed where a sign means money paid out.

Key facts

need = Σ income needed × (1 + inflation)^k ÷ (1 + return)^k over the retirement years
saving = shortfall × r ÷ ((1 + r)^years − 1)

Rules of thumb

Common guides are to replace 70–80% of pre-retirement income, save 10–15% of income, and withdraw about 4% a year. They are starting points, not plans.

Questions

How long will $600,000 last at $5,000 a month?

About 15 years at a 6% return.

Reviewed by RK Calculator Team. Updated 2026-09-26.

Formulas

need = Σ income needed × (1 + inflation)^k ÷ (1 + return)^k over the retirement years
saving = shortfall × r ÷ ((1 + r)^years − 1)

Sources

Limitations

  • Results are estimates for planning, not offers or financial advice; lenders and banks may round, count days or time payments differently.
  • Rates are nominal annual rates compounded as you choose; payments at a different frequency use the equivalent periodic rate.

Formula version 0.1.0Reviewed