How Much Should You Save for Retirement?
The 4% rule, the Rule of 25, 401(k) limits, and target benchmarks by age — a practical guide to knowing whether you are on track for retirement.
Starting With the End: How Much Do You Need?
Before asking how much to save, you need to know your target. The most widely used framework is the Rule of 25: multiply your expected annual retirement spending by 25 to get your target portfolio size. This is derived from the 4% rule — if you withdraw 4% per year, a portfolio needs to be 25× your annual withdrawal to sustain that rate.
Spending $50,000/year → need $1,250,000
Spending $75,000/year → need $1,875,000
Spending $100,000/year → need $2,500,000
This is a starting estimate, not a precise calculation. Social Security, pensions, and part-time income in retirement all reduce how much your portfolio needs to cover.
Benchmarks by Age
Fidelity's widely cited savings benchmarks give a rough checkpoint by age, assuming you want to maintain your current lifestyle in retirement:
| Age | Savings target |
|---|---|
| 30 | 1× your annual salary |
| 35 | 2× your annual salary |
| 40 | 3× your annual salary |
| 50 | 6× your annual salary |
| 55 | 7× your annual salary |
| 60 | 8× your annual salary |
| 67 | 10× your annual salary |
These assume you save 15% of income annually and invest primarily in equities. They are rough guides — your actual target depends on your expected expenses, retirement age, and Social Security benefit.
The Savings Rate That Actually Gets You There
The single most powerful lever is your savings rate — the percentage of income you save. Higher savings rate means both more money going in and lower lifestyle expenses that need to be replaced in retirement.
| Savings rate | Years to retirement (from zero) |
|---|---|
| 5% | ~66 years |
| 10% | ~43 years |
| 15% | ~37 years |
| 20% | ~32 years |
| 30% | ~25 years |
| 50% | ~17 years |
These assume a 5% real return and a 4% withdrawal rate. The math is unforgiving at low savings rates — going from 5% to 15% cuts roughly 30 years off your timeline.
The Account Priority Order
Where you save matters almost as much as how much you save, because tax treatment compounds over decades:
- 401(k) up to employer match — free money; always do this first.
- HSA (if eligible) — triple tax advantage: deductible contributions, tax-free growth, tax-free withdrawals for medical expenses.
- Roth IRA (or traditional IRA) — $7,000/year limit (2025). Roth favors younger investors expecting to be in a higher tax bracket later.
- 401(k) up to the $23,500 limit — max out after the IRA if you have more to save.
- Taxable brokerage — no contribution limits, no tax advantages, but fully flexible.
The Cost of Starting Late vs. Starting Now
A 25-year-old who invests $5,000/year for 10 years then stops — never contributing again — ends up with more at 65 than a 35-year-old who invests $5,000/year every single year until 65. The first person contributed $50,000 total; the second contributed $150,000. Compound growth over time is that powerful.
The practical implication: if you can only choose between starting small now or starting larger in a few years, start small now. Time in the market compounds; waiting does not.
Key points
- Target portfolio = annual retirement spending × 25. Social Security reduces how much you need to self-fund.
- Fidelity's benchmark: 10× your salary saved by age 67. Rough checkpoints: 1× at 30, 3× at 40, 6× at 50.
- Savings rate is the biggest lever. Going from 10% to 20% can cut your timeline by over a decade.
- Always capture the full employer 401(k) match before anything else — it is an instant 50–100% return.
Frequently Asked Questions
What is the 4% rule?
The 4% rule is a guideline that says you can withdraw 4% of your retirement portfolio in year one, then adjust for inflation annually, with a high probability of your money lasting 30 years. It comes from the 1994 Trinity Study. It is a starting point, not a guarantee — sequence-of-returns risk means a bad market in your early retirement years can significantly affect outcomes.
How much does Social Security replace?
For average earners, Social Security replaces roughly 40% of pre-retirement income. High earners see a lower replacement rate, closer to 25–30%. Full retirement age is 67 for people born after 1960. Claiming at 62 reduces your benefit by ~30%; delaying to 70 increases it by ~32% vs. full retirement age.
What is the difference between a 401(k) and an IRA?
A 401(k) is employer-sponsored with higher contribution limits ($23,500 in 2025, plus $7,500 catch-up after 50). An IRA is individual, with lower limits ($7,000 in 2025, plus $1,000 catch-up). Traditional versions give a tax deduction now; Roth versions give tax-free withdrawals in retirement. If your employer offers a 401(k) match, always contribute enough to get the full match first — it is an instant 50–100% return.
Is it too late to save if I am in my 50s?
No. People in their 50s can use catch-up contributions ($7,500 extra in a 401k, $1,000 extra in an IRA in 2025), may have peak earning years ahead, and likely have a shorter retirement horizon to fund. Running the numbers with a calculator is more useful than guilt — even modest increases in savings rate in your 50s meaningfully impact outcomes.