Savings Rate to Retire by a Target Age Calculator
Find the share of your income you must save each year to hit your retirement number by a specific age, given what you already have invested.
How it works
Nest egg = spending ÷ withdrawal rate · Gap = nest egg − current savings·(1+r)^n · Annual saving = gap ÷ [((1+r)^n − 1) ÷ r]
Your target is set by the safe-withdrawal rule: at a 4% rate you need 25 times your annual spending invested. What you already have keeps compounding on its own, so it is projected forward first and subtracted from the target. The remaining gap is filled by a level yearly contribution, and dividing that by income gives the savings rate you have to sustain. Using a real (after-inflation) return keeps everything in today’s dollars.
Worked example
A 30-year-old earning $80,000 with $50,000 invested wants to retire at 55 on $40,000 a year. At a 4% withdrawal rate the target is $1,000,000. The $50,000 grows to about $215,000 over 25 years at a 5% real return, leaving a $785,000 gap — filled by roughly $16,500 a year, or about a 21% savings rate.
Frequently asked questions
Why use a real return instead of a nominal one?
A real return already subtracts inflation, so a $40,000 spending target stays $40,000 in purchasing power at retirement. If you preferred nominal returns you would have to inflate the spending target too — using real figures keeps the whole calculation in today’s money.
What if the required rate is above 50%?
That signals the target age is very aggressive for your income and starting balance. Your options are to retire a little later, trim planned spending, or raise income — each lowers the rate quickly because you gain both more contributions and more years of compounding.
Is the 4% rule guaranteed?
No. It is a historical rule of thumb for a roughly 30-year retirement. Early retirees with a 40- or 50-year horizon often use 3–3.5% to be safe, which raises the nest egg and the required savings rate.
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This is an educational estimate, not financial advice. Real results depend on rates, taxes, fees and market returns that no calculator can guarantee — confirm figures with your lender or a licensed advisor.