Ask ten people how much they need to retire and you’ll get ten answers, most of them guesses. “A million dollars” is the cultural default — but it’s almost never the right number for you. Don’t let that uncertainty become a reason to avoid the question. The real answer comes from a simple chain of logic, and once you see it, the fog clears.
Start with the income, not the nest egg
Your savings target is downstream of one question: how much annual income will you need in retirement? A common rule of thumb is 70–80% of pre-retirement income, since some costs (commuting, payroll taxes, saving itself) disappear. But your number depends on your life — travel, housing, health, and whether your home is paid off. Write down the annual figure you’d want. That’s the foundation.
Subtract the income you’ll already have
You won’t fund that whole amount from savings. For most people, Social Security replaces around 40% of pre-retirement income, and some still have a pension. Every guaranteed dollar is a dollar your nest egg doesn’t have to provide.
The job of your savings is only to fill the gap between the income you want and the guaranteed income you’ll receive.
Turn the gap into a nest egg — a worked example
Here’s the whole chain on someone who wants $60,000 a year:
| Step | Figure |
|---|---|
| Income you want | $60,000/yr |
| − Social Security | −$24,000/yr |
| = Gap your savings must cover | $36,000/yr |
| × 25 (the 4% rule) | ≈ $900,000 |
Two methods converge on that number:
- The 4% rule — divide your annual gap by 0.04 (i.e. multiply by 25). Withdrawing ~4% of the starting balance each year, adjusted for inflation, has historically lasted 30 years.
- Present-value math — more precise. It finds the exact lump sum that, earning a modest real return, funds your inflation-adjusted income for your expected retirement length. It usually lands near the 4% figure but adapts to your assumptions.
The numbers that move it most
Three levers dominate your target:
- Years in retirement. Retiring at 60 and living to 95 needs far more than retiring at 67.
- Your return in retirement. A portfolio earning 5% needs less principal than one earning 3%.
- Inflation. Your income must rise across a 30-year retirement, quietly enlarging the target.
Run your own number
Don’t take “a million dollars” on faith. Plug your desired income, expected Social Security and pension, retirement length and return into the retirement nest egg calculator. In a minute you’ll have a target grounded in your situation. Then check whether you’re on track with the retirement planner, see how a balance converts to income in the retirement income calculator, and read the full retirement guide to connect the pieces.
