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

Bottom line: The most widely used framework is the 4% rule: withdraw 4% of your portfolio per year in retirement. To support that, you need 25x your annual retirement spending saved. Social Security reduces how much portfolio income you need, which meaningfully changes the number for most people.

"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.

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

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 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.

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

Work backward from your expected spending:

1. Estimate annual retirement spending (many people spend 70–80% of pre-retirement income in early retirement, less later)
2. Subtract expected Social Security and any pension income
3. Multiply the remaining annual income need by 25 (or by 33 for a conservative 3% withdrawal rate)

That is your portfolio target.

Retirement planning involves significant uncertainties around market returns, inflation, and longevity. Consider working with a fee-only financial planner for a personalized analysis.