A solid rule of thumb is that you need a nest egg of about 25 times your annual retirement spending - and only 25 times the part that your savings have to cover after Social Security and any pension. That is the same thing as the 4% rule from the other direction: a pot 25 times your spending lets you withdraw roughly 4% in year one and adjust for inflation after that. This guide shows the two ways to estimate your number - the 25x-expenses method and the income-replacement method - with recomputed tables, then how to fold in Social Security and check whether you are on track. Run your own figures any time in the free retirement calculator.
One note on scope before we start. This is the master "am I on track to retire?" question that spans every account you own - 401(k), IRA, Roth, brokerage, and cash combined. If you want to size one specific account, the 401(k) calculator handles employer-sponsored plans with the match, the Roth IRA calculator handles tax-free contributions, and the FIRE calculator is built for retiring early on an expense-based target. This page answers the whole-picture question: what total balance lets you stop working?
Method 1: 25 times your annual spending
The cleanest estimate starts with how much you will spend per year in retirement, not how much you earn now. Multiply that yearly spending by 25 and you have a target that supports a 4% first-year withdrawal. The logic is simple: 1 divided by 0.04 equals 25, so 25x and 4% are the same rule written two ways.
| Annual retirement spending | Nest egg needed (25x) | 4% first-year withdrawal |
|---|---|---|
| $40,000 | $1,000,000 | $40,000 |
| $50,000 | $1,250,000 | $50,000 |
| $60,000 | $1,500,000 | $60,000 |
| $80,000 | $2,000,000 | $80,000 |
| $100,000 | $2,500,000 | $100,000 |
The big insight here is that your target is driven by spending, not income. Two people earning $90,000 can need wildly different nest eggs if one spends $40,000 a year in retirement and the other spends $80,000. That is why the first job is an honest spending estimate, not a percentage of salary.
The shortcut most people miss: subtract guaranteed income first
You do not need 25x your entire spending - only 25x the gap your portfolio must fill after Social Security, a pension, or other steady income. This single adjustment can shrink your target dramatically.
| Annual spending | Other guaranteed income | Gap savings must cover | Nest egg needed (25x of gap) |
|---|---|---|---|
| $50,000 | $20,000 | $30,000 | $750,000 |
| $64,000 | $24,000 | $40,000 | $1,000,000 |
| $80,000 | $30,000 | $50,000 | $1,250,000 |
In the middle row, spending of $64,000 would imply a $1.6 million target at full 25x - but once $24,000 of guaranteed income is subtracted, the portfolio only has to produce $40,000, so the real target drops to $1,000,000. Social Security is described generically here on purpose: your actual benefit depends on your earnings history and the age you claim, so look up your own estimate rather than assuming a figure. The point is to count it as income that lowers the number your savings must hit.
Method 2: the income-replacement ratio
If you have no idea what you will spend, a rougher starting point is to replace a percentage of your pre-retirement income - commonly in the 70% to 85% range, because some costs (commuting, payroll taxes, saving for retirement itself) fall away once you stop working. The table below uses a 75% replacement target and the full 25x multiple, before subtracting Social Security.
| Pre-retirement income | 75% replacement | Full 25x target |
|---|---|---|
| $50,000 | $37,500 | $937,500 |
| $75,000 | $56,250 | $1,406,250 |
| $100,000 | $75,000 | $1,875,000 |
| $150,000 | $112,500 | $2,812,500 |
Treat the income-replacement method as a quick sanity check and the 25x-spending method as the more accurate one. Income replacement is convenient but blunt - a high earner who already lives well below their means is over-targeted by it, while someone with an expensive lifestyle relative to income is under-targeted. When the two methods disagree, trust the spending number.
Are you on track? Working backward to a monthly number
Once you have a target, the next question is whether your current saving gets you there. The table below shows the monthly contribution needed to reach two common targets from a $0 balance, at a 7% average annual return - a reasonable long-run assumption for a diversified stock-heavy portfolio after inflation is set aside.
| Target nest egg | 25 years | 30 years | 35 years |
|---|---|---|---|
| $1,000,000 | $1,234/mo | $820/mo | $555/mo |
| $1,500,000 | $1,852/mo | $1,230/mo | $833/mo |
The pattern is the whole reason to start early: hitting $1,000,000 needs about $555 a month over 35 years but more than double that - $1,234 a month - if you only give yourself 25 years. Every account you own counts toward this number, so add up your 401(k), IRAs, brokerage, and invested cash together when you check your progress. The net worth calculator makes that tally quick, and the investment calculator projects a balance forward from where you are today.
Put your number in today's dollars
A target like $2,000,000 sounds enormous, but if it is 30 years away, it will buy far less than $2,000,000 buys now. There are two honest ways to handle this. The simplest is to build your target from today's spending and then plan with a real (inflation-adjusted) return of roughly 5% instead of a 7% nominal return, so the inflation drag is already baked in. The alternative is to project in nominal dollars and then translate the result back with the inflation calculator to see its true buying power. Either way, the mistake to avoid is mixing a today's-dollars spending figure with a nominal return - that quietly understates how much you need.
How to estimate the money you need to retire
Here is the whole process in five steps you can do in a few minutes.
- Estimate annual retirement spending. Start from your current spending, then subtract costs that will end (a paid-off mortgage, commuting, retirement saving itself) and add ones that may rise, like healthcare.
- Subtract guaranteed income. Look up your own Social Security estimate and add any pension or annuity. The remainder is the gap your savings must cover.
- Multiply the gap by 25. That is your target nest egg, supporting a roughly 4% first-year withdrawal that adjusts for inflation.
- Compare to what you have. Add up every retirement and investment account into one total balance with the net worth calculator.
- Solve for the monthly contribution. Enter your target, timeline, and current balance into the retirement calculator to see the monthly amount that closes the gap.
Common ways the estimate goes wrong
- Targeting income instead of spending. What you need is set by what you will spend, not what you currently earn. Build the number from a real spending estimate.
- Forgetting to subtract Social Security. Counting guaranteed income can cut a multimillion-dollar target down by hundreds of thousands of dollars.
- Ignoring inflation. A flat dollar target decades out overstates its own buying power. Use a real return or translate the result with an inflation calculator.
- Counting one account at a time. This is a whole-portfolio number. A healthy 401(k) can still leave you short if it is your only account; add every account together.
- Treating 4% as a guarantee. The 4% rule is a planning anchor, not a promise - early market downturns while you withdraw can require a more flexible spending plan.
For an independent, ad-free primer on retirement saving and how much to put away, the U.S. Department of Labor's Savings Fitness guide is a solid reference. To go deeper on the drawdown side - how long the money lasts once you stop contributing - pair this with the retirement withdrawal calculator.
The bottom line
The money you need to retire is roughly 25 times the annual spending your own savings must cover after Social Security and any pension - which is the same as a 4% withdrawal target. Estimate your spending, subtract guaranteed income, multiply the gap by 25, and compare that to the combined balance of every account you own. Then plug your real numbers into the retirement calculator to see the monthly contribution that gets you there, and explore the rest of our retirement tools to refine the plan.
Try it yourself
Run your own numbers in the free Retirement Calculator — instant, private, no sign-up.
Open the Retirement Calculator →Frequently asked questions
- How much money do I need to retire?
- You need roughly 25 times the annual spending your savings must cover after Social Security and any pension. If you will spend $60,000 a year and Social Security covers $20,000, your portfolio needs to produce $40,000, so the target is 25 times $40,000, or $1,000,000. The same rule supports a 4% first-year withdrawal that adjusts for inflation afterward.
- What is the 25x rule for retirement?
- The 25x rule says your retirement nest egg should be about 25 times your annual retirement spending. It is the 4% rule viewed from the other side, because 1 divided by 0.04 equals 25. So $50,000 of yearly spending implies a $1,250,000 target, from which you can withdraw roughly $50,000 in the first year and adjust for inflation each year after.
- Should I base my retirement number on income or spending?
- Base it on spending, not income, because what you actually need is set by what you will spend in retirement. Two people earning the same salary can need very different nest eggs if one plans to spend $40,000 a year and the other $80,000. Use the income-replacement method only as a quick sanity check when you cannot estimate spending.
- How does Social Security change how much I need to save?
- Social Security lowers your target because you only need 25 times the spending gap that remains after it. If you plan to spend $64,000 a year and Social Security provides $24,000, your savings only have to cover $40,000, cutting the target from $1,600,000 to $1,000,000. Look up your own benefit estimate rather than assuming a figure, since it depends on your earnings history and claiming age.
- What return should I assume for retirement planning?
- Use about 7% for a diversified, stock-heavy portfolio in nominal terms, or roughly 5% if you want a real, inflation-adjusted return and are building your target from today's spending. The key is consistency: never pair a today's-dollars spending figure with a nominal return, because that mismatch understates how much you actually need.
- How much do I need to save each month to retire a millionaire?
- To reach $1,000,000 from a $0 balance at a 7% average return, you need about $555 a month over 35 years, $820 a month over 30 years, or $1,234 a month over 25 years. Starting earlier roughly halves the required monthly amount, which is why time in the market matters as much as the contribution itself.
Related guides
401(k) Employer Match Explained: The Free Money Most Workers Leave on the Table · What to Do With an Old 401(k): Your Four Options and the Real Cost of Each · What Is My FIRE Number, and How Do You Calculate It? · Coast FIRE: How Much You Need So You Can Stop Saving