Updated: 08.25.2026
“How much do I need to retire?” is one of the most Googled personal finance questions – and one of the least helpfully answered. Most articles either give you a scary number without context or a formula so simplified it’s useless.
Here’s the honest answer with the actual math behind it.
The Number Everyone Cites – and What It Actually Means
The most widely used retirement benchmark is $1 million. It gets thrown around constantly, often without explanation. Here’s where it comes from and why it’s not the right number for everyone.
The underlying framework is the 4% rule. The 4% rule is a guideline that says you can withdraw 4% of your portfolio in your first year of retirement, then adjust for inflation each year after, with a high probability of your money lasting 30 years.
The math works in reverse: if you plan to spend $40,000/year in retirement, you need $1 million saved ($40,000 ÷ 0.04 = $1,000,000). If you plan to spend $60,000/year, you need $1.5 million. If you only need $30,000/year, you need $750,000.
The $1 million benchmark assumes $40,000/year in spending. Whether that’s your number depends entirely on your actual lifestyle.
How to Calculate Your Own Number
The formula is simple:
Annual retirement spending ÷ 0.04 = target portfolio size
The hard part isn’t the math – it’s estimating your annual spending honestly. Most people underestimate what they’ll spend in retirement, especially early on when they’re healthy and active.
Things to include:
- Housing (mortgage paid off or rent continuing)
- Healthcare – healthcare is one of the largest and most underestimated retirement expenses. Fidelity’s 2026 estimate puts lifetime healthcare and medical costs at $185,500 for a single 65-year-old retiring this year, or $371,000 for a married couple retiring at the same age, and that figure jumped 7.5% from last year alone, the biggest single-year increase the report has seen.
- Food, transportation, utilities
- Travel and leisure – often higher in early retirement
- Taxes – retirement income is often still taxable
- Long-term care – a cost most people don’t plan for, and one Fidelity’s estimate above doesn’t even include
A common mistake: planning retirement spending based on current expenses without accounting for the fact that health costs rise significantly with age, and are currently rising faster than general inflation.
Does the 4% Rule Still Hold in 2026?
The 4% rule was developed based on historical market returns, and 2026 brought real news on this front, in two different directions at once. Bill Bengen, the researcher who created the rule back in 1994, revisited his own research using a more diversified portfolio and raised his worst-case safe withdrawal number to 4.7%. Independent research from Morningstar moved the other way, landing at roughly 3.9% for 2026 based on forward-looking market conditions rather than historical data.
Using 3.9% instead of 4% changes the math meaningfully:
| Annual Spending | 4% Rule Target | 3.9% Rule Target |
|---|---|---|
| $30,000 | $750,000 | $769,000 |
| $40,000 | $1,000,000 | $1,026,000 |
| $60,000 | $1,500,000 | $1,538,000 |
| $80,000 | $2,000,000 | $2,051,000 |
Neither number is wrong – they represent different levels of confidence, and Bengen’s more optimistic 4.7% sits on the other side of that same spectrum. The 4% rule gives you roughly a 90% historical success rate over 30 years. The more conservative end gives you more buffer, especially if you expect a retirement longer than 30 years, which is genuinely common for anyone stepping away from physical trade work earlier than a standard 65. This piece is about the target number, how much to actually have saved. What to actually do once you hit that number and start pulling money out, including the full 2026 rate debate, sequence of returns risk, and account withdrawal order, is covered in full in Retirement Withdrawal Strategies.
Don’t Forget Social Security
Your portfolio doesn’t have to cover 100% of your retirement spending. Social Security replaces about 40% of pre-retirement income for average earners. Every dollar Social Security covers is a dollar your portfolio doesn’t have to.
If you expect $1,500/month ($18,000/year) from Social Security and need $50,000/year total, your portfolio only needs to cover $32,000/year – a target of $800,000 at 4% rather than $1.25 million.
Check your estimated Social Security benefit at ssa.gov – it takes five minutes and gives you a real number to work with.
What If You’re Behind?
Most people feel behind on retirement savings. The average American in their 50s has far less saved than recommended benchmarks suggest they should. Feeling behind is normal – and it’s not a reason to give up.
A few honest adjustments that change the math:
Start a side hustle. Extra income directed entirely toward retirement contributions can compress a 10-year gap into 5. A side hustle earning $500-1,000/month invested consistently over 10 years at historical market returns adds $80,000-160,000+ to your retirement portfolio – without touching your regular salary. See everything we cover: Side Hustles Hub
Work longer. Every additional year of work does three things simultaneously: adds contributions, gives existing investments more time to compound, and shortens the retirement period your portfolio needs to fund.
Spend less in retirement. A $10,000 reduction in annual spending reduces your target portfolio by $250,000 at the 4% rule. Lifestyle flexibility is worth more than most people realize.
Take Social Security later. Delaying Social Security from 62 to 70 increases your monthly benefit by roughly 76%. For people with limited savings, maximizing Social Security by waiting is one of the most powerful adjustments available.
Part-time work in early retirement. Covering even $15,000/year through part-time work dramatically reduces portfolio withdrawal pressure in the early years when sequence-of-returns risk is highest.
The Simple Benchmark by Age
If you want a rough gut-check by age, here’s a commonly used framework based on your current salary:
| Age | Savings Target |
|---|---|
| 30 | 1x your salary |
| 40 | 3x your salary |
| 50 | 6x your salary |
| 60 | 8x your salary |
| 67 | 10x your salary |
These are guidelines, not laws. They assume you’ll need roughly 80% of your pre-retirement income annually and retire around 67. Adjust up if you plan to retire early or spend more; adjust down if you’ll have significant Social Security or a pension.
The Most Important Thing
The exact number matters less than starting. Time in the market is the most powerful retirement planning tool available – a dollar invested at 25 does far more work than a dollar invested at 45.
Calculate your number. Compare it to where you are. If there’s a gap, the answer isn’t panic – it’s adjusting contributions, timeline, or expected spending until the math works.
Open or contribute to your retirement accounts at Fidelity, Schwab, or Vanguard and let compounding do the rest.
Related: What Is an IRA – and Why You Probably Need One
Frequently Asked Questions
Take your expected annual retirement spending and divide by 0.04. If you plan to spend $40,000 a year, that’s a $1 million target. The harder part is estimating that annual spending honestly, most people underestimate healthcare costs in particular.
The rule moved in two directions in 2026. Bengen, its original author, revised his own worst-case number up to 4.7% using a more diversified portfolio, while Morningstar’s independent research landed closer to 3.9%. For a savings target, using something closer to 3.9% builds in more of a buffer without requiring a dramatically bigger number.
Yes, and it can meaningfully lower your savings target. Social Security replaces about 40% of pre-retirement income for the average earner. Subtract your expected annual benefit from your total spending need before applying the 4% math, your portfolio only has to cover the rest.
It’s more common than you’d think, and it’s fixable. A side hustle directed entirely at retirement contributions, working a few years longer, delaying Social Security, or trimming planned retirement spending can each meaningfully close the gap. Combining two or three of these usually closes it faster than any one alone.
Fidelity’s 2026 estimate puts lifetime healthcare costs at $185,500 for a single 65-year-old retiree, or $371,000 for a married couple, and that figure doesn’t even include long-term care. It’s one of the most underestimated costs in retirement planning.
A commonly used rough benchmark: 1x your salary saved by 30, 3x by 40, 6x by 50, 8x by 60, and 10x by 67. These assume retiring around 67 on roughly 80% of pre-retirement income, adjust up if you’re planning to retire earlier or expect lighter Social Security or pension coverage.
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