How Much Do You Need to Retire

Figuring out how much money you need to retire is one of the biggest financial questions you'll ever face. The answer's different for everyone, but the methods for finding it are well-established and backed by decades of research. This guide walks you through the frameworks, variables, and strategies you need to land on a retirement number that actually works for your situation.

The 4% Rule: The Starting Point

The 4% rule is the most well-known guideline in retirement planning. Financial planner William Bengen introduced it in 1994: you withdraw 4% of your portfolio in year one, then adjust that amount for inflation each year after that, and you'd have a high probability of not running out of money over a 30-year retirement.

The rule is based on historical market data showing that a diversified stock-and-bond portfolio has survived every 30-year period in U.S. market history using a 4% initial withdrawal rate. To use it, just multiply your expected annual retirement expenses by 25.

The 4% rule isn't perfect — it's based on historical data that may not predict the future, and it assumes a roughly 50/50 stock-bond split. But it's still a great starting point for estimating your target. For a more personalized calculation, try our Retirement Calculator.

Breaking Down Your Retirement Expenses

To know how much you need, you first need to know how much you'll spend. A lot of people assume they'll spend less in retirement, but the reality's more nuanced. Some expenses drop (commuting, work clothes) while others go up (healthcare, travel, hobbies).

A typical retirement spending breakdown looks something like this:

• Housing (30–35%) — Mortgage or rent, property taxes, maintenance, utilities
• Healthcare (15–20%) — Premiums, copays, long-term care, dental, vision
• Food (10–15%) — Groceries and dining out
• Transportation (10–15%) — Even without a commute, you still need a car, insurance, and gas
• Discretionary (15–20%) — Travel, entertainment, gifts, hobbies
• Other (5–10%) — Insurance, personal care, subscriptions, unexpected expenses

Important: Healthcare costs tend to climb significantly as you age. Fidelity estimates that an average 65-year-old couple retiring in 2026 may need roughly $315,000 or more for healthcare throughout retirement — even with Medicare.

Social Security: How It Fits In

Social Security is designed to replace roughly 40% of pre-retirement income for average earners, though the exact amount depends on your earnings history and when you claim. You can start as early as 62, but your monthly benefit goes up for each year you wait until age 70.

Delaying Social Security from 62 to 70 can boost your monthly benefit by roughly 77%. For a lot of retirees, that makes delaying a powerful move — especially if you have other savings to draw from in the early years.

Keep in mind that Social Security benefits can be taxable if your combined income exceeds certain thresholds. Up to 85% of your benefits could be taxed, depending on your filing status and income.

Tax-Advantaged Accounts and Their Role

Where you hold your retirement savings matters almost as much as how much you save. Different accounts come with different tax treatments, and using them strategically can cut your lifetime tax bill significantly.

• Traditional 401(k) and IRA — Contributions are tax-deductible now, but withdrawals in retirement are taxed as ordinary income. Best if you expect to be in a lower tax bracket in retirement.
• Roth 401(k) and Roth IRA — Contributions are made with after-tax dollars, but qualified withdrawals are completely tax-free. Best if you expect your tax rate to be the same or higher in retirement.
• Health Savings Account (HSA) — Often called the "triple tax advantage" account: contributions are tax-deductible, growth is tax-free, and withdrawals for medical expenses are also tax-free. After 65, it works like a Traditional IRA for non-medical withdrawals.

A well-structured retirement plan uses a mix of these accounts to give you flexibility in managing your taxable income during retirement. Use our 401k Calculator to see how different contribution strategies grow over time.

Sequence of Returns Risk

One of the most underappreciated dangers in retirement planning is sequence of returns risk — the risk that bad market returns hit early in your retirement, right when you start making withdrawals. Even if your average returns over 30 years are perfectly fine, a bad sequence can devastate your portfolio.

Imagine two retirees who each have $1 million and withdraw $40,000 per year. Both average 7% annual returns over 25 years. But one gets strong returns in the first decade and weak returns later, while the other gets the opposite. The retiree with strong early returns could end up with hundreds of thousands more — just because the timing was different.

That's why keeping a cash buffer, being flexible with withdrawals during down markets, and holding some bonds matters so much. It's also a strong argument for using guaranteed income sources like annuities to cover essential expenses. Our Annuity Calculator can help you estimate how much guaranteed income your savings could generate.

Monte Carlo Simulation: Planning for Uncertainty

Financial planners increasingly use Monte Carlo simulations to stress-test retirement plans. Instead of assuming one average rate of return, a Monte Carlo simulation runs thousands of scenarios using randomized sequences of market returns based on historical volatility and patterns.

The output is a probability of success — the percentage of simulated scenarios where your portfolio survives your entire retirement. An 85% success rate means that in 85 out of 100 simulated futures, you didn't run out of money.

Monte Carlo isn't a guarantee, but it gives you a much more realistic picture of retirement risk than assuming one fixed return. The big takeaway: planning for a range of outcomes is far more useful than planning for one average outcome.

The Impact of Inflation

Inflation quietly eats away at your retirement savings. At 3% average inflation, the purchasing power of $1 million today drops to roughly $553,000 in 20 years. That means your retirement number has to account for the fact that everything will cost more down the road.

1. Your withdrawal amount grows each year — If you need $60,000 in year one of retirement and inflation runs 3%, you'll need about $80,635 in year 10 and $108,367 in year 20
2. Conservative portfolios are more vulnerable — If you're mostly in bonds or cash, your returns may not keep up with inflation, so your real (inflation-adjusted) portfolio value shrinks even if the nominal number looks fine
3. Social Security has COLA adjustments — Benefits get adjusted annually for cost-of-living increases, which provides some inflation protection
4. Healthcare inflation outpaces general inflation — Medical costs have historically risen faster than the overall consumer price index, making healthcare planning extra important

How to Calculate Your Personal Retirement Number

Here's a step-by-step approach to finding your number:

1. Estimate your annual retirement expenses — Use your current spending as a baseline and adjust for what'll change in retirement
2. Subtract guaranteed income — Subtract expected Social Security, pension income, or annuity payments
3. Multiply the gap by 25 — This applies the 4% rule to find your target portfolio size
4. Adjust for your timeline — If you're retiring early or expect a longer-than-average lifespan, consider using a 3% or 3.5% withdrawal rate instead of 4%
5. Factor in inflation — If retirement is years away, bump up your target to account for rising costs
6. Review and update annually — Your number will change as your income, expenses, and market conditions shift

Retirement planning isn't a one-and-done exercise. The most successful retirees revisit their plan regularly, bump up their savings rate when they can, and stay flexible about their retirement date and spending. Start with the frameworks above, use the calculators to model your specific situation, and refine your plan as you get closer to the finish line.