pillar · fundamentals
How much do I really need to retire? A 2026 reality check
The honest answer is a range, not a number — and the range depends on three things most rules of thumb skip.
By The Yearfold team · April 15, 2026 · Last reviewed May 4, 2026
Every retirement-calculator article on the internet eventually gets to a number. "You need 25 times your annual spending." "You need $1.5 million." "You need 80% of your pre-retirement income." These rules are right in the same way that "the average human is 5'7"" is right — true on average, useless for any specific human.
Here's the version that's actually useful: the number you need depends on three variables you can observe today, and one you can't.
The three you can observe
1. Your monthly spending in retirement, in today's dollars
This is the input that drives everything else. If you spend $4,000/month, you need a different plan than if you spend $9,000/month. The way to estimate it honestly: take your last 12 months of total household outflow (look at your bank statements, not your budget app), then adjust for predictable changes:
- Subtract the costs that stop in retirement: payroll taxes (~7.65% of your wages disappear when you stop working), retirement contributions, commuting, work clothing, kids' college (if applicable).
- Add the costs that go up: healthcare (the typical Medicare-age household spends $13,000–$25,000/year per person on Part B + Part D + Medigap + out-of-pocket per Fidelity's annual estimate), travel (early retirees spend more), home maintenance.
For most middle-income US households, retirement spending lands at 70-90% of pre-retirement spending. The rule of thumb of "80%" is an average; your number is yours.
2. Your Social Security claim age and amount
The single biggest determinant of how much you need from your portfolio is how much Social Security covers. The 2026 average benefit is about $1,975/month (SSA, January 2026). Households with two earners who delay to 70 routinely see combined benefits of $5,000–$7,500/month, in inflation-adjusted dollars, for life.
That's the difference between needing to fund $9,000/month from your portfolio vs. needing to fund $3,000/month. Same lifestyle. Same household. The Social Security claim decision moves the "how much do I need" answer by a factor of two or three.
3. Your time horizon
A 30-year retirement (retire at 65, plan to 95) has different math than a 45-year retirement (retire at 50, plan to 95). The traditional 4% rule was derived from 30-year windows (Bengen, 1994). For a 45-year horizon, the historically-safe withdrawal rate is closer to 3% to 3.3%. That sounds like a small adjustment — it's actually the difference between needing $1.2M and needing $1.6M for the same monthly spending target.
If you're planning a 50-year retirement (retire at 45 with FIRE math), the safe rate drops to 2.8-3.0% in the most-conservative studies. Same lifestyle, same household — just more years to fund.
The one you can't observe
The variable nobody can give you is what the next 10 years of returns actually look like. Sequence-of-returns risk — the order in which you get good and bad years — is what kills retirement plans, not average returns.
A retiree who started in 2000 saw two crashes (2000-2002, 2008-2009) within their first decade. Identical math, identical spending, but their plan looks nothing like a retiree who started in 2010 and rode an 11-year bull market into retirement. Both are statistically valid futures. Both are in the Yearfold Monte Carlo.
The point of running 10,000 simulations isn't to predict the future. It's to see how robust your plan is across the range of futures that have actually happened in US economic history. If your plan succeeds in 95% of them, you're durable. If it succeeds in 60%, you're rolling the dice.
So — how much do I need?
Here's an honest range based on the variables above. Numbers are in 2026 dollars and assume you're claiming Social Security at full retirement age and have a balanced portfolio.
| Retirement spending | Time horizon | Approx. portfolio needed |
|---|---|---|
| $4,000/month | 30 years | $700K–$900K |
| $4,000/month | 45 years | $900K–$1.2M |
| $7,000/month | 30 years | $1.5M–$2.0M |
| $7,000/month | 45 years | $1.9M–$2.5M |
| $10,000/month | 30 years | $2.4M–$3.0M |
| $10,000/month | 45 years | $3.0M–$4.0M |
These ranges assume Social Security covers $2,500-$4,500/month on top of portfolio withdrawals, depending on your earnings history and claim age.
For your specific number — with your spouse modelled, your dependents modelled, and your actual Social Security claim choice — run the calculator. It does the same math, with your inputs.
What about the bank's "$1.5 million" rule?
You've probably seen "you need $1.5M to retire" in a Bankrate article or a bank ad. Where does that number come from? Three sources, usually:
- The 25× rule. $60,000/year × 25 = $1.5M. Works if you spend exactly $60K/year, which most US households don't.
- Average savings of current retirees. The Federal Reserve reports the median retirement savings of households 65-74 is around $200K (Fed Survey of Consumer Finances, 2022). The average is much higher (~$609K) because a small number of wealthy households drag the mean up. Neither average is the same as "what you need."
- Industry marketing. Brokerages benefit when you save more. The "you need $X" headlines are typically anchored to your demographic to encourage you to consolidate accounts with them.
None of those are bad sources. They're just not your specific number.
The leverage points, in priority order
If you've run the math and the answer is "I'm short," here are the moves ranked by how much they actually move success probability per unit of effort:
- Save more. $500/month additional, sustained over 10 years, is roughly $80,000 of extra retirement balance. That moves a typical household's success probability by 5-12 percentage points.
- Work longer. A single year of additional work has an outsized effect: it adds a year of contributions, a year of compounding, and removes a year of withdrawals. Two years of additional work routinely moves success probability by 10-15 percentage points.
- Delay Social Security. Each year you delay past FRA adds 8% to your monthly check for life. The lifetime NPV swing between claiming at 62 and 70 is roughly $80K-$140K depending on your PIA.
- Reduce spending. Cutting $500/month in retirement spending is roughly equivalent to having $150K more saved at retirement. Lifestyle drift in the first five years of retirement is the silent killer of plans.
The right way to think about this
Stop asking "how much do I need?" and start asking "what success probability am I targeting, and which fix gets me there fastest?" Yearfold's calculator shows you both — the headline probability AND the three concrete fixes, ranked by effort, that move it the most.
Everything else is marketing copy.
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