Most calculators give you one optimistic number and call it done. We show three scenarios, factor in inflation, and tell you the gap between where you are and where you need to be.
The number isn’t reassuring for most people. It’s also not as bad as you think — if you start now. Plug in your age, savings, and contributions to see your retirement number, your projected balance, and exactly how to close the gap.
Direct answers to the most common questions, in plain language. Skim if you're in a hurry; dig deeper below.
About 25× the annual spending you want in retirement.
The traditional rule is 25× your annual retirement spending — the inverse of the 4% withdrawal rule. If you want $60K/year in retirement, you need about $1.5M. Adjust down for Social Security, which can cover $20K–$40K of that for most people.
A reasonable starting point — 3.5% is safer for 40-year retirements.
The 1994 Trinity Study assumed a 30-year retirement and is the basis of the 4% rule. For 40-year retirements (early retirees), 3.5% is the safer number. For 25-year retirements, 4.5% can work. Most healthy plans treat 4% as the middle of a range, not a guarantee.
You can start at 62, but benefits jump 8%/yr if you wait to 70.
You can claim as early as 62, but benefits are permanently reduced by about 30% versus full retirement age (67 for anyone born after 1960). Delaying until 70 grows benefits by 8% per year. Break-even is typically age 78–82.
Working one extra year often beats a whole extra year of saving in your 30s.
Every year you delay retirement adds savings, lets existing savings grow, and shortens the drawdown period. Mathematically, working one extra year in your 60s typically improves retirement security more than the same year of saving in your 30s — because three levers move at once.
The mechanics in short answers — no jargon, no upsell.
Starting from your current savings, we compound your annual contributions (including any employer match) at your expected pre-retirement return. Contributions grow each year by your specified increase rate to reflect realistic salary growth.
Using your desired retirement income, expected Social Security, chosen withdrawal rate, and inflation, we figure out how much you actually need at retirement. The number is in future dollars, inflation-adjusted from today.
The most important number on the page. A “$400K short” result is uncomfortable but actionable. We then show three specific levers — extra savings per month, later retirement, lower spending — that close the gap.
Even if you hit your number, sequence-of-returns risk matters. We show your balance year by year through retirement so you can see whether there’s a comfortable cushion or whether a bad first decade depletes the plan.
Designed so anyone can model their situation in under a minute, with or without a finance background.
Today’s dollars in, today’s dollars out. We do the inflation math so the number you see is the one you understand.
Most retirement calculators ignore it. We treat it as the indexed annuity it actually is — it changes the math meaningfully.
Run 3.5%, 4%, or 4.5% withdrawal rates side-by-side. The truth lives in the range, not at one decimal point.
Not just “you’re short.” We tell you the exact extra monthly savings, extra year of work, or spending cut that closes the gap.
Year-by-year balance through retirement so you can see whether the money actually lasts to your life expectancy.
Conservative, base, and aggressive returns side-by-side. The single-point projection is a marketing tool, not a plan.
Everything you might ask before, during, or after using this tool.
The traditional rule is 70–80% of pre-retirement income. The logic: you stop saving for retirement, payroll taxes drop, work expenses (commuting, lunches, professional clothes) disappear, and the mortgage might be paid off. But this varies wildly. Some retirees spend more in early retirement (travel, hobbies) and less later. Others maintain their working-years lifestyle. Look at your actual current spending, subtract savings and work-related costs, and that’s a better starting point.
Generally no — your house is where you live, not a retirement asset, unless you’re explicitly planning to downsize or use a reverse mortgage. Counting home equity is how people end up “house rich, cash poor” in retirement. The exception: if you plan to sell a $1M house and move to a $400K house, that $600K difference is real retirement capital.
For most Americans, Social Security replaces 30–40% of pre-retirement income. The maximum 2026 benefit at full retirement age is about $4,000/month for high earners who maxed contributions for 35+ years. Median benefit is closer to $1,900/month. Get your actual estimate from ssa.gov — it’s the single most important data point in your retirement plan.
The order of investment returns matters enormously in retirement, even if the average is the same. If you retire and the market drops 30% in year 1, you’re selling assets at the worst possible time, depleting your principal faster than expected. This is why retirees keep 2–3 years of expenses in safer assets — to avoid forced selling during downturns.
A 65-year-old couple retiring today can expect to spend roughly $350,000 on healthcare over their remaining lifetimes, according to Fidelity’s annual estimate. This includes Medicare premiums, supplemental insurance, deductibles, prescriptions, and out-of-pocket costs. Long-term care isn’t included — potentially another $100K–$300K. Don’t underestimate this. Many retirement budgets implode because of medical costs.
The math heavily favors later retirement. Working one extra year typically adds 5–8% to your annual sustainable retirement spending. Social Security benefits also grow 8% per year between full retirement age and 70. If you can afford to delay, even by a year or two, it disproportionately improves your retirement security. Of course, health and life circumstances often dictate the timing, regardless of math.
A frequently overlooked piece. Traditional 401(k) and IRA withdrawals are taxed as ordinary income. Roth withdrawals are tax-free. Social Security is partially taxed depending on your other income. Capital gains in brokerage accounts get favorable rates. A sophisticated plan optimizes which accounts to draw from in what order — the basic principle is to fill up the low tax brackets with traditional withdrawals, then use Roth and capital gains for the rest.
For high earners with disciplined saving rates (50%+ of income), yes — early retirement in your 40s or even 30s is mathematically achievable. The FIRE movement uses the same 25× spending math, just applied at younger ages. The trade-offs: longer drawdown periods (40+ years instead of 25), higher uncertainty about Social Security and Medicare eligibility, and a smaller margin of error.
Other Lazysmirk tools that pair well with this one.
See how tax-free Roth IRA growth compounds over decades, how much you’ll have at retirement, and how much tax you’ll save vs a regular brokerage account.
Calculate compound interest with monthly contributions, see the growth curve, and find out why Einstein called it the eighth wonder of the world.
See what your money will be worth years from now. Model lump sums, monthly contributions, and compound growth with one clean calculator.
Calculate your real take-home pay after federal, state, and FICA taxes. Includes 401(k), HSA, health insurance, and other pre-tax deductions.
See how extra EMI payments, yearly prepayments, and lump-sum part payments reduce your home loan tenure and save thousands in interest.
The “retirement number” is the amount you need saved on the day you stop working. The standard calculation is 25 times your annual retirement spending — the inverse of the 4% withdrawal rule. If you want to spend $60,000/year in today’s dollars, you need $1.5 million.
But that number is incomplete. It assumes you start drawing immediately, that your spending stays flat in real terms, that returns cooperate, and that you don’t live past 90. Each assumption can fail.
A more honest number factors in healthcare cost inflation (which runs higher than general inflation), longevity risk, and sequence-of-returns risk (a bad first decade in retirement can deplete your portfolio years before plan). The conservative version is 30× spending — about a 3.3% withdrawal rate. For someone wanting $60K/year, that’s $1.8M instead of $1.5M. For $80K/year, $2.4M. For $100K/year, $3M.
These numbers shock people who haven’t done the math. The median 401(k) balance for Americans nearing retirement is about $250K. The gap between actual savings and the required nest egg is the largest single financial vulnerability for American households.
Two savers each contribute $500/month at 7% real returns. Saver A starts at 25 and stops at 35 — just 10 years, $60K total contributions. Saver B starts at 35 and contributes until 65 — 30 years, $180K total. At 65, Saver A has about $675K. Saver B has about $612K.
Saver A contributed three times less and ended up with more. The earliest dollars have the most time to compound. The dollar you invest at 25 has 40 years to multiply. The dollar you invest at 50 has 15 years. Same dollar, vastly different outcome.
This isn’t an excuse for late starters to give up — every dollar still helps. But catching up later requires either dramatically higher contributions, dramatically higher returns (and risk), or accepting a lower retirement lifestyle. If you’re 25 and reading this: start. Even $100/month at 25 beats $500/month at 40. If you’re 45 and reading this: still start, but be honest that you’ll need to save aggressively — like 20%+ of income — to catch up.
The single most underestimated retirement cost is healthcare. Most calculators don’t factor it in explicitly because Medicare exists — but Medicare doesn’t cover everything. Part A (hospital) is free. Part B (medical) costs about $185/month per person in 2026. Part D (drugs) typically $30–$80/month. Medigap or Medicare Advantage adds another $100–$300/month. Total: roughly $400–$600/month per person just for premiums.
Then there’s out-of-pocket: copays, dental, vision, hearing aids (not covered by Medicare), and any prescriptions not on your Part D formulary. Fidelity’s annual estimate is that a 65-year-old couple needs about $350,000 to cover lifetime healthcare costs in retirement.
Long-term care is the wild card. About 70% of people over 65 will need some form of long-term care. Average cost: $108,000/year for a private nursing home room in 2026. Medicare doesn’t cover this. The take-home: budget $400K–$600K per couple for healthcare on top of regular retirement spending. If you assume Medicare handles everything, you’re underestimating retirement costs by 20–30%.
The accumulation phase is the easy part. The drawdown phase is where retirement plans actually succeed or fail. The 4% rule, developed by William Bengen in 1994, says you can withdraw 4% of your retirement balance in year 1, then increase that dollar amount by inflation each year, and have a 95%+ chance of not running out of money over a 30-year retirement.
The rule has held up well in backtesting against the worst historical periods (including 1929 and 1970s stagflation). But it has caveats. It assumes a 50/50 to 60/40 stock/bond portfolio. It assumes you’ll mechanically increase spending by inflation each year, regardless of market conditions. And it was developed for 30-year retirements — for 40+ year retirements, 3.5% is safer.
Smart retirees often use dynamic withdrawal strategies. The “guardrails” approach: start at 4%, but cut spending if your portfolio drops significantly, and increase if it grows. This adds resilience without permanently overusing a low fixed rate.
The other key insight: the first decade of retirement matters disproportionately. Bad returns in years 1–10 can wreck a 30-year plan even if average returns over the full period are fine. This is sequence-of-returns risk, and it’s why retirees should keep 2–3 years of expenses in safer assets — cash, short-term bonds, or a CD ladder. The goal isn’t to maximize returns; it’s to avoid forced selling during downturns. Retirement isn’t a finish line — it’s a 30+ year process that requires adjustments, monitoring, and flexibility.
Two short notes worth reading before you trust any number on this page.
Your loan amount, rate, and prepayment inputs never leave your device. No accounts, no cookies on your numbers, no analytics on the values you type. Disconnect from the internet and it still works.
We are not a bank, NBFC, advisor, broker, or distributor of any financial product. The numbers shown here are estimates for educational purposes only, based on the inputs you provide.
Results are not financial, legal, or tax advice. Please consult a qualified professional before any decision about your loan, investments, or personal finances. Actual loan terms and charges depend on your bank and individual circumstances.
Social Security: bigger than you think, smaller than you’d hope
Social Security is one of the most underappreciated pieces of the American retirement system. Median benefits run about $1,900/month — $22,800/year for life, indexed to inflation, with survivor benefits for spouses. In present-value terms, a typical benefit is equivalent to having roughly $500,000–$700,000 in retirement assets. For median earners, it’s the single largest “asset” they’ll have in retirement.
But it’s not enough on its own. Replacing pre-retirement income at the 40% level (typical for middle-class earners) means a major lifestyle adjustment. People earning $80K who retire on Social Security alone are looking at $24K/year.
The “when to claim” decision is more important than most people realize. Claiming at 62 means a permanent 30% reduction versus full retirement age. Delaying from 67 to 70 means a permanent 24% increase. Break-even is usually 78–82. If you have reason to believe you’ll live longer than that — family history, good health, female (women live longer on average) — delaying is mathematically clear. If health is poor or family history is short, claiming earlier makes sense.