Can I Stop Saving and Still Retire?

You can stop adding new money to your retirement account if the balance you already have will grow to what you need by your retirement age. This idea goes by the name "Coast FIRE," and it comes down to one honest math problem: does your money compound fast enough and long enough without your help? If it does, you stop saving. If it does not, you keep going. There is no shame either way.

What Coast FIRE Actually Means

FIRE means Financial Independence, Retire Early. You save a large pile, then you never work again.

Coast FIRE is the smaller, quieter cousin. You save enough during your high-earning years to cover your retirement gap. After that, you stop contributing to your 401(k), IRA, RRSP, or TFSA (tax-sheltered retirement and savings accounts). But you still work. Maybe you take a lower-pay job. Maybe you go part-time. The point is your saved money keeps growing on its own, so you do not have to keep feeding it.

You are not quitting your income today. You are quitting the pressure to keep saving.

The Math in Plain Numbers

The question is: "How much do I need in the bank today so it grows to my target number by retirement, without me adding a penny?"

Here is the formula in words. Take your target number. Divide it by the growth factor for the years between now and retirement. The result is your Coast FIRE number.

For example, say you want $1,000,000 in your account by age 65. You are 35. You have 30 years. You assume your money grows about 7% a year on average (a rough long-run stock-market figure, not a promise).

• Growth factor: (1.07) raised to the 30th power = about 7.61
• Coast number: $1,000,000 ÷ 7.61 = about $131,000

If you have roughly $131,000 at 35, the math says it becomes about $1,000,000 by 65. You can coast.

Here is the same $1,000,000 target at other starting ages, still at 7% a year:

Your age	Years to 65	What you need now	Why it works
35	30	about $131,000	30 years of 7% growth multiplies by 7.6
40	25	about $184,000	25 years multiplies by 5.4
45	20	about $258,000	20 years multiplies by 3.9
50	15	about $362,000	15 years multiplies by 2.8
55	10	about $508,000	10 years multiplies by 2.0

Notice the pattern. The later you start, the more you need to have in hand. At 55, your balance basically has to double. That leaves very little room for a bad market stretch.

These are round numbers for a $1 million target. Your own target might be higher or lower. If you want to see how your actual savings, spending, Social Security or CPP/OAS benefits, taxes, and inflation all fit together in one picture, When Can I Retire works out the age you can retire and shows every step of the math for free.

Where the Money Lives Matters

Coast FIRE only works if the account you are coasting in actually grows. A savings account at 0.5% will not compound into anything useful over 20 years. The accounts people usually coast in are investment accounts: a 401(k), an IRA, a taxable brokerage account, or in Canada an RRSP or TFSA.

If you are torn between a 401(k) and an IRA for the years before you coast, this comparison of a 401(k) versus an IRA walks through how each one is taxed on the way in and on the way out. The tax rules change yearly, so always check irs.gov or canada.ca for the latest contribution limits.

The Bridge Years You Cannot Skip

Most people who Coast FIRE around age 40 or 50 still have years before government benefits start. In the U.S., Social Security can begin as early as 62, and full retirement age is 67 for anyone born in 1960 or later (ssa.gov). In Canada, CPP can start at 60 and OAS can be deferred as late as 70 (canada.ca).

Those gap years are the ones your Coast FIRE balance must not eat into. If you stop saving at 40 but cannot touch your 401(k) without a penalty until 59½, you need a separate cash cushion or a side income to get through. Coast FIRE does not cover that gap. A plan does.

For a full picture of how those early years work when benefits start later than you do, see how to retire early if benefits start later.

When Coast FIRE Makes Sense

Coast FIRE fits people in a few specific spots:

• You started saving young and aggressively. Your employer match did heavy lifting through your 20s and early 30s. Now you want a break.
• You are about to switch to a lower-paying job, go part-time, or change careers. You want to protect your retirement track without the stress of high savings.
• You want to pay down a mortgage or fund a kid's education, and you are okay pausing new retirement contributions for a while.

It is not a fit if your current balance is tiny. If you have $20,000 at 45 and want $1 million by 65, the math does not let you coast. That is fine. Starting late is not a failure. Retiring from zero at 40 walks through what catching up looks like.

If you are close but not quite at your coast number, try halving your contribution instead of stopping to zero. The gap is often only a few thousand dollars, and that small push keeps your target on track.

The Risk You Are Taking

Coast FIRE trades certainty for time. You are betting that 7% (or whatever rate you pick) will hold over 20 to 30 years. Markets do not move in a straight line. A bad decade early on can set you behind. A bad decade right before you retire hurts even more, which is why many planners watch sequence of returns risk, the danger of a crash hitting right when withdrawals begin.

Two small habits soften the blow. First, keep contributing when you can, even a little. Coast FIRE does not forbid a bonus deposit. Second, leave yourself a wider gap between your coast number and your target. If the math says $131,000, coasting with $160,000 gives you breathing room.

How to Check Your Own Number

You do not need a spreadsheet the size of a novel. Grab a calculator app.

1. Estimate what you will spend a year in retirement. Many people aim for about 80% of their last working income, but only you know your real number.
2. Multiply that annual spending by about 25. This comes from the 4% rule, a rough withdrawal guide. It is a starting point, not a law.
3. Subtract what your Social Security or CPP/OAS will be worth in today's dollars if you want to be precise. Or leave them out and let your account cover everything. That is more conservative.
4. Divide by the growth factor for the years you have left.
5. Compare that result to what is in your account today.

If your balance is above the number, you have room to coast. If it is below, you keep saving. Neither answer means you did something wrong. It just tells you where you are right now, which is the only honest place to plan from.