How Much Do You Need to Retire? Calculator
Estimate your retirement number based on your age, savings, contributions, and expected expenses. All inputs are flexible—change any field to model your own scenario.
Figuring out how much you need to retire comes down to three levers: how much you spend in retirement, how long that money has to last, and what return your portfolio earns along the way. A common rule of thumb is the 4% safe withdrawal rate, which implies you need roughly 25 times your annual expenses saved. For example, if you expect to spend $60,000 per year in retirement, you would target about $1,500,000 in invested assets. This calculator applies that framework while also projecting what you are on track to accumulate given your current savings and monthly contributions.
The gap between your projected savings and your target number is what really matters. Suppose you are 35, have $80,000 saved, contribute $800 per month, and expect a 6% real return until age 65. Your portfolio would grow to roughly $1,260,000—short of a $1.5M goal by about $240,000. Closing that gap usually means increasing contributions, delaying retirement by 2–3 years, or trimming expected expenses. The tool below recalculates every output the moment you change an input, so you can quickly test which adjustment moves the needle most for your situation.
How it works: Enter your current age, planned retirement age, current savings, monthly contributions, expected real return, and annual retirement expenses. The calculator projects your savings forward, computes your target nest egg using the 25x rule, and shows your shortfall or surplus.
This is an educational estimate, not financial advice. Real retirement planning should account for taxes, healthcare, Social Security timing, and market volatility.
How Much You Really Need to Retire in 2026
Your retirement number is personal: it depends on your spending, time horizon, and return assumptions. The 25x rule is a useful starting point, but the right answer comes from stress-testing your own inputs.
Target nest egg by annual expenses (4% rule)
| Annual expenses | Target at 4% (25x) | Target at 3.5% (~28.6x) | Monthly income at 4% |
|---|---|---|---|
| $40,000 | $1,000,000 | $1,142,857 | $3,333 |
| $60,000 | $1,500,000 | $1,714,286 | $5,000 |
| $80,000 | $2,000,000 | $2,285,714 | $6,667 |
| $100,000 | $2,500,000 | $2,857,143 | $8,333 |
| $150,000 | $3,750,000 | $4,285,714 | $12,500 |
Monthly savings needed to reach $1,500,000 (6% real return)
| Current age | Years to 65 | Starting at $0 | Starting at $100,000 |
|---|---|---|---|
| 25 | 40 | $753 | $22 |
| 30 | 35 | $1,054 | $163 |
| 35 | 30 | $1,494 | $398 |
| 40 | 25 | $2,164 | $759 |
| 45 | 20 | $3,247 | $1,372 |
| 50 | 15 | $5,158 | $2,486 |
The 4% rule and the 25x heuristic
The 4% rule comes from the Trinity Study, which found that retirees who withdrew 4% of their initial portfolio (adjusted for inflation) had a high probability of not running out of money over 30 years. Mathematically, that means you need 25 times your annual expenses saved—spend $60,000 per year and you target $1.5M. A more conservative 3.5% rate (about 28.6x) is often suggested for early retirees with longer horizons. The rule assumes a diversified stock/bond portfolio and historical U.S. returns, so it is a guideline, not a guarantee.
Estimating your retirement expenses
Most planners suggest retirees spend 70–85% of their pre-retirement income, because work-related costs disappear and mortgages are often paid off. But healthcare typically rises—Fidelity estimates a 65-year-old couple retiring in 2026 will spend roughly $330,000 on medical costs over retirement. A useful exercise: track current spending for three months, subtract commute, work clothes, and retirement contributions, and add healthcare premiums plus a buffer for travel. If you spend $7,000/month working, plan on roughly $5,000–$6,000/month in retirement as a baseline.
Why your real return assumption matters
Returns compound, so small assumption changes create huge differences. A 30-year-old saving $500/month at 7% real returns reaches about $610,000 by 65; at 5%, only $415,000—a $195,000 difference from a 2-point assumption. Most planners use 5–7% real (after inflation) for a 60/40 stock/bond portfolio. Rule of thumb: be more conservative as you near retirement, since you have less time to recover from a downturn. Bogleheads commonly model 4–5% real for balanced portfolios; aggressive all-equity savers sometimes use 6–7%.
Social Security and other income sources
Social Security replaces roughly 40% of pre-retirement income for the average worker, with the maximum 2026 benefit at full retirement age around $4,000/month. Pensions, rental income, and part-time work can dramatically lower your required nest egg. If you expect $2,500/month from Social Security ($30,000/year), you only need to fund the gap—$60,000 expenses minus $30,000 SS equals $30,000, requiring $750,000 saved instead of $1.5M. Delaying SS from 62 to 70 boosts benefits by roughly 77%, which can be one of the highest-return decisions available.
Sequence-of-returns risk
Two retirees with identical average returns can have very different outcomes if one hits a bear market in the first five years of retirement. Withdrawing from a falling portfolio locks in losses. Common defenses: hold 2–3 years of expenses in cash/short bonds, use a 'bucket' strategy, or reduce withdrawals temporarily during downturns. A guideline is to keep enough safe assets to cover 24–36 months of essential spending, so you never have to sell stocks at the bottom. This is especially critical between ages 60 and 70.
Catch-up strategies if you're behind
If your projected savings fall short, you have four main levers: save more, work longer, spend less, or invest more aggressively. Working two extra years often closes a 20% gap—you add contributions, shorten the withdrawal period, and may delay Social Security. The 2026 401(k) catch-up limit for age 50+ is $7,500 above the standard $23,500, and HSAs add another $1,000 catch-up after 55. Trimming retirement expenses by $10,000/year reduces your target by $250,000 at a 4% withdrawal rate—often easier than saving an extra $250,000.
Common myths about retirement numbers
Myth: 'I need $1 million to retire.' Reality: the number depends entirely on your expenses—a frugal retiree spending $30,000/year needs $750,000, while a $120,000 lifestyle needs $3M. Myth: 'Social Security will be gone.' Even under worst-case projections, the trust fund shortfall reduces benefits to about 77% of scheduled amounts after 2033, not zero. Myth: 'I should be 100% bonds in retirement.' A 30-year retirement actually needs equity exposure (typically 40–60%) to outpace inflation. Rule of thumb: '110 minus age' for stock allocation works for most retirees.
How This Calculator Works: Methodology & Parameter Explanations
Core formula: Target = Annual expenses ÷ Withdrawal rate. Projected savings = Current savings × (1+r)^years + Monthly contribution × [((1+r/12)^months − 1) ÷ (r/12)]. Gap = Projected − Target.
Parameter explanations
| Input | What it means | Impact on results |
|---|---|---|
| Current age & retirement age | Defines years until retirement (retirement_age − current_age) and your compounding window. | Each additional year of compounding at 6% adds roughly 6% to existing balances plus a full year of contributions. Delaying retirement by 5 years can grow projected savings by 30–40%. |
| Current retirement savings | Total invested across 401(k), IRA, Roth, taxable brokerage, and HSA earmarked for retirement. | Grows at the compound rate without further input. Doubling current savings roughly doubles the 'growth of current savings' line in your breakdown. |
| Monthly contribution | Combined personal + employer contributions added every month until retirement. | Linear effect on the future-value-of-annuity term. Adding $200/month for 30 years at 6% adds about $200,000 to your projected total. |
| Expected return (real) | Annual return after inflation. Keeps all dollar figures in today's purchasing power. | Highly nonlinear. A 1-point increase (e.g., 5% to 6%) can lift a 30-year projection by 15–20%. |
| Expected annual expenses | Total yearly spending in retirement in today's dollars. | Directly scales the target nest egg via the 25x multiplier. $10,000 more in expenses = $250,000 more needed at a 4% rate. |
| Safe withdrawal rate | Percentage of the portfolio you withdraw in year one of retirement. | Inverse effect on target: lowering from 4% to 3.5% raises the required nest egg by about 14%. |
Assumptions
All dollar amounts are in today's (real) terms; the expected return is real (after inflation), so no separate inflation adjustment is applied to contributions or expenses.
Contributions are made at the end of each month and grow at the same compound rate as the portfolio.
The target nest egg uses a constant-percentage withdrawal heuristic (e.g., 25x at 4%) and does not model Social Security, pensions, taxes, or sequence-of-returns risk explicitly.
The default values (age 35, $80K saved, $800/month, 6% return, $60K expenses) are illustrative examples, not hard-coded limits—the calculator works for any valid combination of inputs.
Parameter meanings
| Input | What it means | Impact on results |
|---|---|---|
| Current age & retirement age | Years your money has to compound before withdrawals begin | More years = exponentially larger projected savings |
| Current savings | Existing invested balance earmarked for retirement | Compounds without new deposits; head start of $100K at 6% over 30 years ≈ $574K |
| Monthly contribution | Recurring deposits including employer match | Each $100/month over 30 years at 6% ≈ $100,000 added to projection |
| Expected real return | Annual portfolio return after inflation | Strongly nonlinear; 5% vs 7% over 30 years differs by ~50% |
| Annual expenses | Yearly retirement spending in today's dollars | Sets the target via expenses ÷ withdrawal rate |
| Withdrawal rate | Year-one withdrawal percentage | Lower rate = larger target (3% requires 33x, 4% requires 25x) |