How Much You Actually Need to Retire

The number you need is not a round figure from a magazine. It is a function of what you spend, what Social Security replaces, and how long the money has to last.

By Hutu Laurentiu · Published 1 November 2026 · 10 min read

The Question Behind the Question

People ask how much they need to retire and expect a dollar figure back. What they are actually asking is whether the life they have now can keep going after the paycheck stops. Those are different questions, and the second one has a much better answer, because it starts from what you spend instead of from a number somebody else picked for you.

Ask a saver for a target and you will often hear a million dollars, because a million is the default number in this country. Ask what they spend in a year and the conversation changes. A household paying $3,000 a month for rent, food, utilities, insurance, and a car, plus a couple of vacations, spends roughly $52,000 a year. Against a $1,000,000 portfolio that is a 5.2% withdrawal rate. Most of the research behind safe withdrawal rates was done at 4%. So the household has either saved enough or has not, depending on a rate it never chose.

This is why the work starts with a budget rather than a target. Pull twelve months of statements and add up what actually left your accounts. The total is usually higher than the estimate, and a meaningful share of it is discretionary: subscriptions, delivery, and the slow accumulation of purchases that were fun once. Sorting spending into essential and optional is the most useful hour you can spend on retirement planning, because it produces both your target and your emergency fund size.

Replacement Ratios: Why 70% to 80% Is the Usual Starting Point

Planners usually start from 70% to 80% of pre-retirement income. That range is not a law. It is a net of the costs that disappear when you stop working against the costs that rise. Commuting, payroll taxes, retirement contributions, and the second car fall away. Health insurance before Medicare, travel, hobbies, and help for adult children rise. For many households the two sides roughly cancel at a level somewhat below take-home pay, which is where the convention comes from.

The ratio moves with income, and it moves a lot. A household earning $45,000 spends nearly all of it on necessities, so replacement needs to be close to 90% or the budget breaks. A household earning $250,000 can drop to 60% by taking one fewer vacation and driving the same car another three years. The percentage is doing the same work in each case, but the cut it implies is not remotely the same. Applying one ratio to every income is the second place a simple rule fails.

Social Security takes a bite out of whatever the ratio produces. If your target is 80% of $70,000, you need $56,000 a year. If Social Security provides $26,000 of that, the portfolio only has to fund $30,000. That subtraction is the whole game. It is also why high earners need larger portfolios than the percentages suggest: their benefits replace a smaller share of pay, so the gap they must cover from savings is proportionally wider.

The 4% Rule and Its Fine Print

The 4% rule comes from research by William Bengen published in 1994 and extended by the Trinity study a few years later. Using US market returns going back to the 1920s, those papers asked how much a retiree could take from a balanced portfolio each year, rising with inflation, without running out of money inside 30 years. The rate that survived the worst starting points - 1929, 1966, 1973 - was about 4%. Nobody derived it from a theory of the future. It is a statement about the past, and it gets quoted far more confidently than its authors intended.

The arithmetic is simple enough to do in your head. Four percent of $1,000,000 is $40,000, so a million dollars funds $40,000 of spending. Run it backward: a $50,000 annual gap needs $1,250,000, because $50,000 divided by 0.04 is $1,250,000. Multiply whatever gap you have by 25 and you have the portfolio.

The caveats matter more than the headline.

• It assumes a 30-year retirement. Retire at 60 and you are planning for longer; retire at 70 and the same 4% is conservative.
• It assumes a portfolio of roughly 60% stocks and 40% bonds, rebalanced, held at low cost.
• It is a historical worst case for the United States, a market that never lost a war on its own soil. Other countries have done worse.
• It says nothing about sequence. A 30% drop in year one is survivable; the same drop in year ten, after a decade of withdrawals, is not.
• It ignores taxes on withdrawals and any fee above a few basis points. Both come out of the 4%.

Target Multiples by Retirement Age

The convenience of a multiple is that you can compare it to your salary without doing any present-value math. The table below builds the multiple from three inputs: spending of 80% of final pay at $60,000 and 70% at $120,000, Social Security replacing 40% and 27% of pay respectively, and a withdrawal rate matched to how long the money has to last. It assumes you live to 92.

Two forces move the multiple in opposite directions. Retiring later shrinks it, because the portfolio covers fewer years and can support a slightly higher withdrawal rate. Earning more raises it, because Social Security replaces a smaller fraction of a large salary, leaving a wider gap for savings to fill. The age effect is stronger than most people expect: the difference between retiring at 62 and at 70 is close to a fifth of the required portfolio.

Treat these figures as a floor for a household with a steady work history and no pension, not as a universal target. A household with a pension, a paid-off house, or an appetite for a simpler retirement can go lower. A household retiring into an expensive health-care market, or one with a spouse who will need care, should go higher.

The Costs the Ratio Misses: Health Care and Long-Term Care

Medicare is not free, and it does not start until 65. Part B carries a monthly premium deducted from Social Security, and most people who want predictable costs add a Medigap policy and a Part D drug plan on top. Dental, vision, and hearing aids sit largely outside Medicare. Industry estimates of lifetime health-care spending for a couple retiring at 65 run well into six figures, and those estimates typically exclude long-term care.

Long-term care is the real tail risk. Medicare pays for a short skilled nursing stay following a hospital admission; it does not pay for months of help with dressing, bathing, and medication. Medicaid does pay, but only after a spend-down that can consume most of a household's assets. A private room in a nursing home often costs more than $100,000 a year, and home health aide hours are billed hourly with no cap. One spouse needing three years of care can undo a plan that looked comfortable on paper.

The practical fix is to treat health care as a line item outside the replacement ratio rather than burying it inside. Set aside a separate reserve, fund a health savings account if you have a qualifying high-deductible plan, and decide in advance how much of a long-term care event you could absorb before Medicaid becomes the answer. That decision is uncomfortable, and it is also the difference between a plan and a hope.

Turning the Number Into a Monthly Deposit

A target is only useful if it converts into a deposit. At 7% a year, $500 a month grows to about $405,000 in 25 years. You will have contributed $150,000 of that; the rest is compounding. To reach $1,000,000 in 30 years at the same return you need about $820 a month. To reach $800,000 in 25 years you need about $990. Those are the numbers to put in front of a 35-year-old, not the size of the target.

Time does more work than the deposit. Invest $500 a month from age 35 to 55 and you have roughly $260,000 at 7%. Keep going ten more years and the balance is about $610,000. That final decade added $350,000, of which only $60,000 came out of your pocket. The difference between starting at 35 and starting at 45 is not a third more money; it is about 2.3 times as much at 65, from the same monthly deposit.

There are limits on how fast this can happen inside tax-advantaged accounts. For 2026 the 401(k) elective deferral limit is $24,500 and the IRA limit is $7,500. Those caps are generous for most savers and binding for few, but they shape the order of operations: capture every employer match first, then fill the IRA, then return to the 401(k), and only then use a taxable account.

A Number You Revise, Not a Number You Find

Any retirement number is a snapshot of assumptions that will change. Returns will differ from 7%. Inflation will differ from 3%. Your spending will differ from your estimate, usually in both directions at different times. The useful practice is to recompute once a year with real balances and real spending, and to adjust the plan rather than the assumption. A household that checks in annually has dozens of chances to fix a shortfall. A household that sets a target at 40 and never revisits it has one.

Taxes belong in the model too. Money in a traditional 401(k) or IRA is taxed on withdrawal, so $1,000,000 of that money funds less spending than $1,000,000 in a Roth account. A mix of pre-tax, Roth, and taxable savings gives you room to manage brackets in retirement, and that room is worth more than most people assume while they are in their peak earning years.

The one thing to avoid is treating the number as a verdict. A household that has saved four times pay at 55 is behind the six-times guideline and still has a decade and a rising salary. A household that has saved twelve times pay at 40 is ahead of schedule and may be over-saving at the cost of years it will not get back. Both are information, not judgment.