The most widely used retirement formula is based on the 4% Safe Withdrawal Rate — the amount you can safely withdraw from a diversified portfolio each year without running out of money over 30 years.
These numbers assume your portfolio is invested in a diversified mix of stocks and bonds, and that you withdraw 4% in year one, then adjust for inflation each year after. This is based on the Trinity Study — a landmark piece of financial research showing this approach has historically sustained portfolios for 30+ years.
Enter your current savings, monthly contribution, expected return and retirement age — see exactly whether you're on track.
Open Retirement Calculator →| Annual Spending | Monthly Spending | FIRE Number (25x) | Years to Retire (saving $2K/mo at 7%) |
|---|---|---|---|
| $30,000 | $2,500 | $750,000 | 18 years |
| $40,000 | $3,333 | $1,000,000 | 22 years |
| $50,000 | $4,167 | $1,250,000 | 26 years |
| $60,000 | $5,000 | $1,500,000 | 29 years |
| $80,000 | $6,667 | $2,000,000 | 34 years |
| $100,000 | $8,333 | $2,500,000 | 39 years |
The 4% rule comes from the 1994 Trinity Study by three finance professors who analyzed historical market data from 1926 to 1976. They found that a portfolio of 50% stocks and 50% bonds could sustain 4% annual withdrawals (adjusted for inflation) for 30 years with a very high success rate — over 95% in most market scenarios.
The 4% rule was designed for 30-year retirements. If you retire at 40 and live to 90, you need 50 years of coverage. Many financial planners now recommend a 3–3.5% withdrawal rate for early retirees, which means a 28–33x multiplier instead of 25x.
Here's what Americans actually have saved vs what financial advisors recommend:
| Age | Average Saved (Fidelity 2026) | Recommended (1x salary) | Status |
|---|---|---|---|
| 30 | $45,000 | 1x salary (~$60K) | Behind |
| 35 | $87,000 | 2x salary (~$120K) | Behind |
| 40 | $148,000 | 3x salary (~$180K) | Behind |
| 45 | $254,000 | 4x salary (~$240K) | Close |
| 50 | $390,000 | 6x salary (~$360K) | Behind |
| 55 | $537,000 | 7x salary (~$420K) | Close |
| 60 | $700,000 | 8x salary (~$480K) | On track |
The average American is behind on retirement savings at nearly every age. The median (middle value) is significantly lower — around $87,000 for all working-age adults combined. This highlights why starting early and maximizing contributions matters so much.
Here's what you need to save monthly starting at different ages to reach $1 million by age 65 at a 7% annual return:
| Starting Age | Years to Invest | Monthly Savings Needed | Total Contributed |
|---|---|---|---|
| 25 | 40 years | $381/mo | $182,880 |
| 30 | 35 years | $555/mo | $232,980 |
| 35 | 30 years | $820/mo | $295,200 |
| 40 | 25 years | $1,239/mo | $371,700 |
| 45 | 20 years | $1,944/mo | $466,560 |
| 50 | 15 years | $3,154/mo | $567,720 |
Starting at 25 costs $381/month. Waiting until 45 costs $1,944/month — more than 5x as much — to reach the same goal. This is the single most powerful argument for starting retirement savings as early as possible.
| FIRE Type | Annual Spending | Portfolio Target | Lifestyle |
|---|---|---|---|
| Lean FIRE | $25,000–$40,000 | $625K–$1M | Frugal, minimal expenses, often rural |
| Regular FIRE | $40,000–$80,000 | $1M–$2M | Comfortable middle-class lifestyle |
| Fat FIRE | $100,000–$200,000 | $2.5M–$5M | Luxury retirement, travel, no compromises |
| Barista FIRE | $30,000–$50,000 | $500K–$800K | Part-time work covers some expenses |
| Coast FIRE | Any | Enough to compound | Stop contributing, let compound interest do the rest |
Coast FIRE means saving aggressively early until your portfolio is large enough to grow to your retirement number on its own — without any additional contributions. Someone who saves $150,000 by age 30 at 7% growth will have $1.14 million by 65 without saving another dollar. This lets you take lower-paying but more fulfilling work in your 30s and 40s.
| Account | 2026 Limit | Tax Benefit | Best For |
|---|---|---|---|
| 401k (Traditional) | $23,500/yr | Pre-tax contributions, tax-deferred growth | High earners reducing current tax bill |
| 401k (Roth) | $23,500/yr | After-tax contributions, tax-free growth | Those expecting higher taxes in retirement |
| IRA (Traditional) | $7,000/yr | May be tax-deductible, tax-deferred growth | Those without workplace 401k |
| Roth IRA | $7,000/yr | After-tax, completely tax-free in retirement | Young earners in low tax brackets |
| Catch-up (50+) | +$7,500 to 401k | Extra contribution allowed after age 50 | Late starters catching up |
The general order: First contribute enough to your 401k to get the full employer match (free money). Then max your Roth IRA ($7,000). Then go back and max the 401k ($23,500). Any additional savings go into taxable brokerage accounts.
Enter your age, current savings, monthly contribution and target — find out your projected retirement date and whether you'll hit your number.
Check My Retirement →Your investment portfolio is only one piece of retirement income. Understanding all your sources dramatically changes how much you need to save — and could mean retiring years earlier than you think.
| Income Source | Avg Monthly Amount | Portfolio Equivalent (4% rule) | Reliability |
|---|---|---|---|
| Social Security | $1,907 (avg 2026) | ~$572,000 | High (inflation-adjusted) |
| Pension | Varies widely | $300K–$1M+ | Very high (employer-backed) |
| Rental Income | $500–$2,000 net | $150K–$600K | Medium (vacancy risk) |
| Part-time Work | $1,000–$2,500 | $300K–$750K | Medium (health dependent) |
| Annuity | Varies by amount | Converts lump sum | High (insurance-backed) |
The average Social Security benefit of $1,907/month is the portfolio-equivalent of having an extra $572,000 saved — because at a 4% withdrawal rate, $572,000 generates $1,907/month. This is why delaying Social Security to age 70 (when benefits are 32% higher than at 67) is often the highest-ROI retirement decision available. Every year you delay past 62 increases your benefit by 6–8%. Use the Social Security calculator to model your specific benefit timing.
Build a guaranteed "income floor" — Social Security + pension + annuity — that covers your essential expenses (housing, food, healthcare). Everything above the floor comes from your portfolio. This approach lets you take more investment risk with the portfolio because you're not dependent on it for survival.
This is the most underestimated risk in retirement planning. Sequence of returns risk means that the order of your portfolio's annual returns matters enormously — not just the average. Two retirees with identical average returns over 20 years can have radically different outcomes based solely on when the bad years hit.
| Scenario | Year 1–5 Returns | Year 15–20 Returns | $1M Portfolio — Balance at 20 Years |
|---|---|---|---|
| Lucky Sequence | +20%, +15%, +12%, +10%, +8% | -20%, -15%, -10%... | ~$1.4M remaining |
| Unlucky Sequence | -20%, -15%, -10%... | +20%, +15%, +12%... | ~$200K remaining (or depleted) |
Both sequences have the same average annual return — but the retiree who hits the crash in year 1–5 is forced to sell shares at depressed prices to fund living expenses, permanently destroying their portfolio's recovery potential. The solution is the bucket strategy:
This structure means you never have to sell stocks during a bear market. Combine it with the retirement calculator to stress-test your savings against a sequence-of-returns scenario at retirement age.
At 3% average inflation, the purchasing power of $1 halves approximately every 24 years. For someone retiring at 65 and living to 90, this is a 25-year erosion problem. Your retirement plan must account for it explicitly — not just assume your spending stays flat.
| Today's Cost | In 10 Years (3% inflation) | In 20 Years | In 30 Years |
|---|---|---|---|
| $5,000/mo expenses | $6,720/mo | $9,030/mo | $12,136/mo |
| $4,000/mo expenses | $5,376/mo | $7,224/mo | $9,709/mo |
| $3,000/mo expenses | $4,032/mo | $5,418/mo | $7,281/mo |
This is why the 4% rule works: historical stock market returns have averaged ~10%/year (7% real after inflation). A diversified portfolio historically grows faster than inflation, protecting purchasing power across a 30-year retirement. But "historically" is the operative word — a flat savings account or CD ladder does not protect against inflation over 30 years. Healthcare inflation, which runs 5–6%/year, is especially punishing in retirement and often the biggest budget wildcard. Plan for healthcare costs rising at 2x the general inflation rate.
Most people retire with the bulk of their savings in pre-tax accounts (Traditional 401k, Traditional IRA). Every dollar you withdraw in retirement is taxed as ordinary income. A Roth conversion ladder is a strategy to systematically convert pre-tax money to Roth during low-income years — paying tax now at low rates to avoid higher rates later.
The ideal window for conversions is between early retirement and age 73 (when Required Minimum Distributions begin) — especially if you retire before Social Security kicks in. During this window, your taxable income may be very low, putting you in the 12% or 22% bracket. Converting $50,000/year at 22% is far better than being forced to take RMDs of $100,000+/year at 32%+ in your 70s.
| Strategy | Annual Tax on $50K Withdrawal | Over 20 Years |
|---|---|---|
| All Traditional (no Roth conversion) | ~$6,600 (22% bracket) | ~$132,000 in taxes |
| Roth Conversion Ladder (convert during low-income years) | ~$3,000 (12% bracket) | ~$60,000 in taxes |
The $72,000 tax savings over 20 years compounds further — those dollars, if invested, grow to significantly more. Use the Roth IRA calculator alongside the retirement calculator to model the after-tax value of your accounts under different conversion scenarios. Consult a CPA before executing a conversion ladder — your specific numbers, state taxes, and Medicare premiums (IRMAA) all affect the optimal strategy.
It depends entirely on your annual spending in retirement. Use the 25x rule: multiply your expected annual expenses by 25. If you plan to spend $60,000/year, you need $1.5 million. If you'll have Social Security covering $20,000/year, you only need to fund the remaining $40,000 yourself — requiring $1 million in savings.
Yes, if your annual expenses are $40,000 or less. At the 4% rule, $1 million generates $40,000/year — $3,333/month. Combined with Social Security averaging $1,800/month, you could comfortably live on $5,133/month, which is above average US household spending. The key is keeping retirement expenses under control.
The average retirement income for Americans 65 and older is approximately $75,000/year from all sources (Social Security, pensions, retirement accounts, part-time work). The median is closer to $47,000. Social Security alone averages about $1,800–$2,000/month per person in 2026.
The 4% rule remains a solid starting point but some experts now recommend 3.5% given longer life expectancies and current market valuations. For a 30-year retirement starting at 65, 4% remains well-supported. For early retirees planning a 40–50 year retirement, a more conservative 3–3.5% withdrawal rate is safer, implying a 29–33x portfolio multiplier.
Every $1,000/month in Social Security benefits reduces your required portfolio by $300,000 (at the 4% rule, $12,000/year ÷ 0.04 = $300,000). The average Social Security benefit in 2026 is ~$1,900/month — worth $570,000 in portfolio equivalent. Factor this in when calculating your personal retirement number.