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Retirement Planning 101: How Much Do You Really Need?

8 min read May 9, 2026By TheCalcUniverse Editorial

The amount you need for retirement depends on your spending, not a generic number. Here is how to calculate your personal retirement number using the 4% rule.


The 4% Rule Explained

The 4% rule says you can withdraw 4% of your retirement savings in your first year of retirement, then adjust for inflation each year, with a high probability that your money lasts 30 years. Under this rule, if you need $40,000 per year from investments, you need $1 million saved ($40,000 / 0.04 = $1,000,000). The rule was based on historical US stock and bond returns from 1926-1995 and is a guideline, not a guarantee. Many experts now recommend 3-3.5% for longer retirements.

Savings Benchmarks by Age

AgeTarget (1x Salary)Target (3x Expenses)
301x salary$90,000
352x salary$180,000
403x salary$270,000
454x salary$360,000
506x salary$540,000
557x salary$630,000
608x salary$720,000
6510x salary$900,000

Social Security and Pensions

Social Security replaces about 40% of pre-retirement income for the average worker. If you have a pension, factor that into your calculations too. The retirement calculator lets you include Social Security and pension income to see how much you still need from your savings. Remember: Social Security benefits increase by about 8% per year if you delay claiming from age 62 to 70.

Frequently Asked Questions

What if I want to retire early (before 59.5)?

Early retirement requires a higher savings rate (typically 50%+ of income) and careful tax planning. You can access 401(k) funds penalty-free through Roth conversion ladders or SEPP (72t) distributions. Health insurance before Medicare also needs to be factored in. The retirement calculator includes early retirement scenarios.

How do I account for inflation in my retirement plan?

Use real (after-inflation) return rates in your calculations. If you expect 7% market returns and 3% inflation, use 4% as your real return. The retirement calculator has an inflation toggle to show both nominal and real (inflation-adjusted) projections.

Try the Retirement Calculator

Calculate how much you need to save for retirement with our free calculator.

Written by

TheCalcUniverse Editorial

Finance & Analytics Team

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