The 25x retirement rule is a straightforward guideline suggesting you need 25 times your annual expenses saved before you can retire comfortably. A commonly cited origin traces to William Bengen's 1994 research, which found that a 4% initial withdrawal rate sustained portfolios over 30-year retirement periods in most historical scenarios.
The problem many savers face is translating this simple multiplier into a personalized target when income, lifestyle, and healthcare costs all vary. This article explains how the rule works, where it falls short, and how to adapt it to your situation using real planning tools.
What Is the 25x Retirement Rule?
The 25x retirement rule states that your retirement savings should equal 25 times your expected annual spending in your first year of retirement. If you plan to spend $50,000 per year, your target portfolio would be $1.25 million.
The math behind the rule comes from the inverse of the 4% safe withdrawal rate. Divide 100% by 4%, and you get 25. This connection matters because the rule is not an independent discovery but a restatement of Bengen's withdrawal research.
The rule assumes you invest in a diversified portfolio of roughly 50% to 75% stocks. It also assumes you adjust withdrawals for inflation each year. These assumptions rarely hold perfectly in practice, which is why the 25x retirement rule works better as a starting point than a final answer.
How to apply this: Calculate your current annual spending from bank statements, then multiply by 25 to see where your savings stand today.
How the 25x Rule Compares to Other Retirement Targets
Several retirement savings benchmarks exist, and the 25x retirement rule is only one of them. Fidelity Investments publishes age-based savings milestones, suggesting you save 10x your income by age 67. The 25x rule differs because it uses expenses, not income, as the baseline.
Expense-based targets are generally more accurate. Two people earning $100,000 may have very different spending levels, so income-based multiples can mislead. The 25x retirement rule accounts for this by anchoring to what you actually spend.
One limitation is that the rule ignores non-portfolio income. Social Security, pensions, or rental income reduce how much you need to withdraw from savings. If Social Security covers $20,000 of your $50,000 spending need, your portfolio only needs to generate $30,000 annually — a $750,000 target under the 25x retirement rule, not $1.25 million.
How to apply this: Subtract guaranteed income sources from your annual spending before multiplying by 25.
| Benchmark | Basis | Example Target | Action to Take |
|---|---|---|---|
| 25x rule | Annual expenses | $1.25M for $50k spending | Track real spending, not income |
| 4% rule | First-year withdrawal | 4% of portfolio | Test against historical returns |
| Fidelity 10x | Final salary | $1M for $100k income | Compare to expense-based math |
| 80% income rule | Pre-retirement income | $80k for $100k income | Adjust for actual lifestyle |
Common Mistakes When Applying the 25x Rule
A frequent error is forgetting that taxes are an expense. If you need $50,000 to live on after taxes, your gross withdrawal must be higher. The 25x retirement rule targets your total spending, including what goes to the IRS.
Another mistake is ignoring healthcare costs. Fidelity's 2024 Retiree Health Care Cost Estimate reports that a 65-year-old retiring in 2024 may need approximately $165,000 saved just for healthcare expenses throughout retirement. This figure does not include long-term care, which can add substantially more.
Inflation is another blind spot. The 25x retirement rule assumes your spending rises with inflation, but your portfolio must keep pace too. A portfolio heavy in cash or bonds may fall behind, forcing larger withdrawals later.
How to apply this: Build a retirement budget that includes taxes, healthcare premiums, and a 2% to 3% annual inflation buffer before applying the 25x retirement rule.
Tools and Resources for Calculating Your 25x Number
Several free tools can help you apply the 25x retirement rule with real data. ProjectionLab lets you model retirement scenarios with adjustable spending, tax rates, and withdrawal strategies. It visualizes how long your portfolio lasts under different assumptions.
NewRetirement offers a detailed retirement planner that incorporates Social Security timing, healthcare costs, and home equity. It is useful for stress-testing your 25x target against real-world variables.
For a simpler check, Fidelity's Retirement Score estimates whether your current savings trajectory meets your spending needs. It does not use the 25x formula directly, but it provides a useful cross-check.
How to apply this: Enter your current savings and expected spending into one of these tools, then compare its projection to your 25x target.
Is the 25x Rule Still Reliable in 2025?
Critics argue the 25x retirement rule may be too optimistic in today's market conditions. Morningstar's 2024 research on safe withdrawal rates suggested that lower expected bond returns could reduce the sustainable initial withdrawal rate to around 3.7% for new retirees. That would imply a multiplier closer to 27x annual spending.
Conversely, retirees with flexible spending may find 25x more than adequate. If you can cut discretionary costs during market downturns, your portfolio faces less sequence-of-returns risk. The 25x retirement rule assumes steady inflation-adjusted withdrawals, which many retirees do not actually follow.
Retirement researcher Wade Pfau has noted that safe withdrawal rates depend heavily on market valuation levels at the retirement date and the retiree's time horizon. His work suggests no single multiplier fits every starting point.
How to apply this: If you are within five years of retirement, run a Monte Carlo simulation through a tool like ProjectionLab to see your portfolio's success probability at various spending levels.
Frequently Asked Questions About 25x retirement rule
What counts as "annual expenses" in the 25x retirement rule?
Annual expenses include everything you spend in a year: housing, food, transportation, healthcare, taxes, travel, and discretionary purchases. The 25x retirement rule uses gross spending, not net income. A common scenario is someone who forgets irregular costs like home repairs or car replacement. Track spending for 12 full months, including one-time items, to get an accurate baseline.
Does the 25x retirement rule work for early retirement?
The 25x retirement rule was originally tested over 30-year horizons, not 40 or 50 years. Early retirees face longer withdrawal periods and need more conservative assumptions. If you retire at 45, consider a 3% to 3.5% initial withdrawal rate, which translates to 28x to 33x annual expenses. Sequence-of-returns risk is also higher with longer horizons.
How does Social Security change my 25x target?
Social Security reduces your portfolio's required contribution to annual spending. Subtract your expected Social Security benefit from total spending, then multiply the remainder by 25. The 25x retirement rule applies to the gap your savings must fill. Check your estimated benefit through the Social Security Administration's online portal before doing this math.
Can I use the 25x rule if I have a pension?
Yes. Pensions function like Social Security as guaranteed income. Subtract your annual pension amount from expected spending, then apply the 25x retirement rule to the remaining gap. A retiree spending $60,000 with a $25,000 pension needs $35,000 from savings, targeting an $875,000 portfolio rather than $1.5 million.
What if my spending changes significantly after retirement?
The 25x retirement rule assumes stable inflation-adjusted spending, but real retirement spending often declines in later years. David Blanchett's research on the "retirement spending smile" found spending typically decreases in early retirement, bottoms out, then rises late in life due to healthcare. Adjust your 25x target upward if you expect high late-life medical costs.
Conclusion
The 25x retirement rule gives you a fast, memorable benchmark for retirement readiness, but it works best as a starting point rather than a rigid formula.
- Calculate your real annual spending, including taxes and irregular costs
- Subtract guaranteed income from Social Security, pensions, or rental properties
- Adjust the multiplier based on your retirement age and market conditions
- Use planning tools to stress-test your number against historical and projected returns
Your next step is simple: pull your last 12 months of bank and credit card statements, total your spending, and multiply by 25. That single number tells you how far you are from your target — and where to focus your savings efforts next.
