There is no single correct answer to "how much should I save for retirement?" — but there are well-established benchmarks that can anchor your plan. The short version: most financial professionals recommend saving 10% to 15% of your gross income for retirement, starting as early as possible, with a common target of replacing 70% to 80% of your pre-retirement income. Your actual number depends on your current age, income, expected Social Security benefits, lifestyle goals, and how long you expect retirement to last.
This guide breaks down the rules of thumb, the math behind them, and how to translate a percentage into a dollar figure you can act on.
The 15% Rule: A Widely Used Starting Point
Fidelity Investments, one of the largest retirement plan providers in the U.S., recommends saving at least 15% of your pre-tax income each year, including any employer match. That figure assumes you start in your mid-20s and retire around age 67. If you start later, the required rate rises — often to 20% or more — because you have fewer years of compounding to work with.
The 15% includes:
- Your own contributions to a 401(k), 403(b), or similar workplace plan
- Any employer match (for example, a 50% match on the first 6% of pay is worth 3% of your salary)
- Contributions to an IRA or Roth IRA
- Savings in a taxable brokerage account earmarked for retirement
If your employer matches 5% and you contribute 10%, you are effectively saving 15% of your salary — a simple way to hit the benchmark without changing your budget much.
The Income Replacement Target: 70% to 80%
Rather than focusing only on a savings percentage, many planners work backward from the income you will need in retirement. The U.S. Department of Labor and most major financial firms suggest aiming to replace about 70% to 80% of your pre-retirement income. The gap is filled by lower expenses (no commute, no payroll taxes, often a paid-off mortgage) and by Social Security.
For example, if you earn $80,000 a year, a 75% replacement target means roughly $60,000 of annual retirement income. If Social Security provides $24,000 of that, your savings and other sources need to cover the remaining $36,000.
Age-Based Benchmarks: Are You on Track?
Fidelity's widely cited savings milestones give a rough check on progress, assuming you save 15% of income and retire at 67:
- Age 30: 1x your salary
- Age 35: 2x your salary
- Age 40: 3x your salary
- Age 45: 4x your salary
- Age 50: 6x your salary
- Age 55: 7x your salary
- Age 60: 8x your salary
- Age 67: 10x your salary
These are guidelines, not rules. Someone with a pension, a high savings rate, or modest retirement spending may need less; someone retiring early or supporting dependents may need more. Use them as a diagnostic, then adjust.
Turning a Percentage Into a Dollar Amount
To convert the 15% rule into a monthly figure, multiply your gross annual income by 0.15 and divide by 12. On a $90,000 salary, that is $13,500 a year, or about $1,125 a month — less any employer match. If that feels out of reach, increase your 401(k) contribution by 1% each time you get a raise until you reach the target. Automatic escalation features in most workplace plans make this easy.
Also confirm you are capturing the full employer match. According to Vanguard's How America Saves report, the average employer match is around 4% to 5% of pay. Leaving part of it on the table is one of the most common and costly retirement mistakes.
How the 4% Rule Shapes Your Target Number
Once you know your desired annual retirement income, the 4% rule offers a rough way to estimate the portfolio you need. It suggests withdrawing about 4% of your portfolio in the first year of retirement, then adjusting for inflation. To generate $36,000 a year from savings, you would need roughly $900,000 ($36,000 ÷ 0.04).
The 4% rule comes from the Trinity Study and later updates by financial researcher William Bengen. It is a planning heuristic, not a guarantee — market returns, fees, taxes, and longevity all affect outcomes. Many planners now suggest 3.5% to 4.5% depending on asset allocation and time horizon.
Why Starting Early Matters More Than the Exact Number
Compound growth rewards time. Investing $500 a month at an average 7% annual return grows to roughly $1.2 million over 40 years, but only about $600,000 over 30 years — the same contributions, half the result. If you are behind, the levers are straightforward: raise your savings rate, work a few years longer, delay claiming Social Security (which increases benefits by about 8% per year between full retirement age and 70), or reduce planned retirement spending.
What to Remember
Aim to save 15% of gross income, including your employer match, and check your progress against age-based benchmarks. Translate your percentage into a monthly dollar figure, capture every dollar of employer match, and use the 70%–80% income replacement target plus the 4% rule to estimate your portfolio goal. If you are behind, increase contributions with each raise and consider delaying Social Security. The most reliable strategy is not finding a perfect number — it is starting now and adjusting as your income and goals change.
