How much do you need to retire? A practical framework
Instead of guessing at a magic number, start with what you’ll spend and work backward to a savings target.
Key takeaways
- Estimate your retirement spending. Many planners start at 70% to 80% of pre-retirement income and adjust from there.
- Subtract guaranteed income, such as Social Security or a pension, to find the gap your savings must cover.
- A common rule of thumb is to save about 25 times that annual gap, based on a 4% initial withdrawal rate.
Step 1: Estimate your retirement spending
Start with your current spending, then adjust for what will change. Commuting costs and retirement contributions may go away, while travel, hobbies and healthcare may cost more. If you’re far from retirement, the 70% to 80% income-replacement rule is a reasonable placeholder.
Step 2: Subtract guaranteed income
Social Security, pensions and annuities reduce how much your savings need to provide. In the U.S., you can estimate future Social Security benefits by creating an account on the Social Security Administration’s website.
Step 3: Turn the gap into a target
The 4% rule suggests withdrawing 4% of your savings in the first year of retirement and adjusting that amount for inflation afterward. Dividing your annual gap by 4% — the same as multiplying it by 25 — gives a starting savings target.
Adjust for your situation
Rules of thumb are a starting point, not a plan.
- Retiring early means more years to fund, so consider a lower withdrawal rate, such as 3.5%.
- Inflation steadily raises costs; plan in today’s dollars and update your numbers every year.
- Healthcare before Medicare eligibility can be a major expense.
- Market downturns early in retirement have an outsized effect, so keep some cash and bonds.
Step 4: Work out what to save now
Compare your target with what you’ve saved and what you’re contributing. A retirement calculator can project your balance at retirement and show how much more you would need to save each month to close any gap.
The bottom line
Your retirement number is a moving target, not a verdict. Build your estimate from your own spending, check it once a year and adjust your savings rate as your life changes.
Frequently asked questions
Is the 4% rule still reliable?
It’s a useful starting point based on historical U.S. market returns, not a guarantee. Some planners suggest flexible withdrawals that fall in bad years and rise in good ones.
What if I’m behind?
Raise your savings rate, use catch-up contributions after 50, consider working a few years longer and look for ways to reduce expected expenses. Small changes add up.
This guide is for educational purposes only and isn’t personalized financial, investment, tax or legal advice. Rules, limits and rates change, so confirm current figures with official sources or a qualified professional.