Retirement planning feels impossibly complex, but for most people it boils down to two numbers. The first is how big a nest egg you will need. The second is how much to set aside each month to build it in time. Estimate those two, and the fog of retirement planning clears into a concrete goal you can actually work toward.

Here is how to find both.

Number one: how much you will need

A quick way to size your target is to estimate your annual spending in retirement, then multiply by 25 (the flip side of a 4 percent withdrawal rate). Plan to spend $60,000 a year from savings and you are aiming at about $1.5 million. It is only an estimate, Social Security, a pension, or part-time work lower the pile you need to have saved, but it turns an abstract worry into a figure you can target.

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The calculator above refines the target using your age, current savings, and expected return, and tells you the monthly amount to reach it.

Number two: how much to save now

Once you know the target, the second number is the monthly saving that gets you there in time, and it depends enormously on when you start. A common guideline is saving around 15 percent of income, including any employer match, for someone who begins in their twenties or thirties. Start later and the required rate climbs, which is why beginning now, even modestly, matters more than the exact amount.

Retirement is not one giant leap. It is a monthly habit, repeated for decades, that compounding turns into a fortune.

Will you really spend that much?

Many people overestimate their retirement spending. The mortgage may be paid off, the commute and work costs gone, and the kids independent. A common rule of thumb pegs retirement spending at 70 to 80 percent of pre-retirement income, though your own number depends on your plans, travel and hobbies can push it up, a paid-off simple life can pull it down. Refine your target as retirement nears and your real spending comes into focus.

Start where you are

If 15 percent feels impossible, start with whatever you can and raise it a point with every pay increase. The habit and the early start matter more than hitting a perfect number today.

Estimate both numbers above, then see the whole roadmap in our retirement planning guide.

Frequently asked questions

How much do I need to save for retirement?

A quick estimate is your expected annual spending from savings times 25, so $60,000 a year points to about $1.5 million. Social Security, pensions, or part-time work reduce the amount you need saved.

What percentage of income should I save for retirement?

Around 15 percent of gross income, including any employer match, for someone starting in their twenties or thirties. Starting later means saving a higher share or working a bit longer.

How much of my income will I spend in retirement?

A common rule of thumb is 70 to 80 percent of pre-retirement income, since the mortgage, commute, and work costs often fall. Your own number depends on your plans and lifestyle.

What if I cannot save 15 percent?

Start with whatever you can and raise your rate by a percentage point with each pay increase. The early start and the habit matter more than immediately hitting a target rate.

S
SumWize Editorial Team
Personal finance, reviewed for accuracy

SumWize builds free, private financial calculators and the plain-language guides that go with them. Every figure here uses standard finance formulas and current U.S. figures; see our methodology for the exact math. This is educational information, not financial advice.

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