How Much Do I Need to Save for Retirement? The Real Number

"How much do I need to retire?" is the most commonly asked retirement question and the most poorly answered. Vague targets ($1 million, $2 million) are not useful without knowing what those numbers support in your specific situation. Understanding how much to save for retirement requires personalizing these benchmarks to your actual expenses and lifestyle goals.

The starting point is understanding the frameworks, then applying them to your spending and income reality.

Quick answer

The standard answer is the 4% rule: save 25 times your expected annual retirement spending, then withdraw 4% of the portfolio in the first year and adjust for inflation after that. If you need $60,000 a year from savings, that's $1,500,000. Social Security changes the math meaningfully. If it covers $24,000 of that $60,000, your portfolio only needs to fund the remaining $36,000, or $900,000 at the same 4% rate, well below a flat target like $1 million. Most planners suggest saving 15% of income across your career to reach this, more if you start later. Run your own spending and Social Security numbers through the SwitchWize Money Map instead of borrowing a stranger's round number.

The 4% Rule

The 4% rule (also called the "safe withdrawal rate") comes from research by financial planner William Bengen in 1994, updated by the Trinity Study. The finding: a retiree who withdraws 4% of their portfolio in the first year of retirement and adjusts for inflation each subsequent year has historically had a portfolio last 30+ years in the vast majority of scenarios, including periods that included major recessions.

The math:

• If you need $60,000/year from your portfolio in retirement
• $60,000 ÷ 0.04 = $1,500,000 in portfolio savings needed

Or equivalently: you need 25x your annual retirement spending (25 × $60,000 = $1,500,000).

Adjusting for Social Security

Social Security reduces how much portfolio income you need. If you will receive $24,000/year in Social Security benefits and your retirement spending is $60,000/year, you only need $36,000/year from your portfolio.

$36,000 ÷ 0.04 = $900,000 needed (instead of $1,500,000)

This is a significant difference. Your current Social Security benefit estimate is available at ssa.gov (create an account to see your projected benefit at various claiming ages).

Savings Benchmarks by Age

Fidelity's commonly cited benchmarks (based on saving 15% of income from age 25, planning to retire at 67):

These are guidelines, not guarantees. Someone retiring at 62 needs more saved (longer drawdown period, earlier Social Security claim). Someone with a pension or significant rental income needs less.

That 1-2 years of cash shouldn't sit at 0%. Parking it in a top high-yield savings account, currently paying 4.20%, instead of a checking account or a low-yield money market fund at the same brokerage, is a free way to reduce the drag of holding cash you're not investing.

Which Multiple Applies to You

The 15% Savings Rate Target

Most financial planners recommend saving 15% of gross income for retirement across your career (including employer match). If you start early and invest consistently in diversified low-cost index funds, 15% tends to produce a comfortable retirement at 65–67 for most income levels.

If you are starting later, the required savings rate climbs:

• Starting at 25: 10–15% may be sufficient
• Starting at 35: 15–20%
• Starting at 45: 25–35%

These are rough estimates assuming average market returns. The later you start, the less compounding time you have.

Your Retirement Income Number

That is your portfolio target. Run the exact numbers, your spending, your Social Security estimate, and your target retirement age, through the retirement number calculator instead of doing the arithmetic by hand. If you're still deciding between account types along the way, see Roth IRA vs. traditional IRA and what is a 401(k) for how the tax treatment affects this same math.

Sources

The 4% withdrawal rate originates with William Bengen's 1994 research and the later Trinity Study; Social Security benefit estimates should come directly from the Social Security Administration (ssa.gov), not a generic online estimate. Retiree spending patterns referenced above draw on the Bureau of Labor Statistics Consumer Expenditure Survey (bls.gov/cex). Retirement planning involves significant uncertainty around market returns, inflation, and longevity; consider working with a fee-only financial planner for a personalized analysis.