About the Early Retirement Calculator
This early retirement calculator finds the earliest age at which your investments can cover your spending for the rest of your life. It grows your current savings plus what you add each year at a real (after-inflation) return, and stops when the balance reaches your target — your annual spending divided by a safe withdrawal rate.
It is built for people asking “can I retire early?” or “can I retire at 55?”. Enter a target age to see the balance you are projected to have then and the spending that balance could support, so you can compare the age you want with the age the numbers allow.
Everything is expressed in today’s dollars, so spending and targets do not need to be inflated by hand. The model assumes contributions at the end of each year and a constant average return; it does not include Social Security or pensions, which would lower the savings you need. The search runs 60 years ahead; if the target is not reached in that time the calculator says so instead of showing an age.
With the default inputs, the earliest retirement age is 53. Change any value above to recalculate instantly.
How to use the early retirement calculator
- 1Enter your age and the savings you already have invested.
- 2Enter how much you save each year and what you expect to spend yearly in retirement.
- 3Set the expected return, inflation and a safe withdrawal rate.
- 4Read the earliest age you could retire.
- 5Enter the age you would like to retire to see how close that goal is.
Formula and method
The savings target is the portfolio that can fund your spending at the safe withdrawal rate — 25× spending at 4%, about 28.6× at 3.5%. Starting from today’s balance, each year the savings grow by the real return and your yearly saving is added at year end. The earliest retirement age is the first year the balance meets the target.
The real return is (1 + nominal return) ÷ (1 + inflation) − 1, which keeps all amounts in today’s dollars. The savings rate assumes your current spending equals your planned retirement spending, a common simplification in early-retirement planning.
- SWR
- Safe withdrawal rate
- B
- Invested savings (today’s dollars)
- S
- Amount saved per year
- r_real
- Real annual return
Worked examples
Age 40, $300k saved, saving $50k and spending $50k
The target is 25 × $50,000 = $1.25 million. Growing $300,000 at a real return of about 3.88% while adding $50,000 a year crosses $1.25 million after 13 years, so you could retire at 53 — and by 55 you would have about $1.52 million.
Age 30, saving $25k, spending $40k, 3.5% withdrawal
At 3.5% the target is $1.14 million. With a 3.88% real return the balance reaches it at 55; at 50 you would have about $842,600 — enough for roughly $29,500 a year.
Target out of reach
Spending $80,000 needs $2 million. Saving $2,000 a year on top of $10,000 at a 3.88% real return reaches only about $80,300 by 60, and still falls short after 60 years, so no retirement age is shown.
Frequently asked questions
How much do I need to retire early?+
A common rule is 25 times your yearly spending (a 4% withdrawal rate). Because early retirements can last 40 years or more, many planners suggest 28–33 times spending (3%–3.5%).
Can I retire at 55?+
Enter 55 as your chosen age to see your projected balance then and the spending it can support. If it falls short, the earliest retirement age shows when your plan does work.
How do I access retirement accounts before 59½?+
Options include the rule of 55 for your last employer’s 401(k), 72(t) substantially equal periodic payments, a Roth conversion ladder, Roth IRA contributions, and taxable brokerage savings.
What about health insurance before Medicare?+
Early retirees in the US must fund health cover until Medicare at 65, often through the ACA marketplace. Include premiums and out-of-pocket costs in your annual spending.
Why does the calculator use a real return?+
Using the return after inflation keeps the target and your savings in today’s dollars, so you can enter spending as it looks today without inflating it yourself.
Results are estimates for educational purposes and are not financial advice. Rates, fees and terms vary — confirm with your lender or a licensed advisor before making decisions.