What Is Coast FIRE in 2026?
Coast FIRE is one of the most practical ideas in the financial independence movement: a finish line you can reach years earlier than full retirement, after which your savings take care of themselves.
What is Coast FIRE?
Coast FIRE is the point where your invested savings are large enough that compound growth alone will grow them to your full retirement target by your chosen retirement age, with no further contributions. You still work to cover living costs, but you can stop saving for retirement.
The word “coast” captures it exactly. Instead of saving half your income until you can quit work entirely, you save hard for a shorter period, reach your coast number, and let compounding do the rest.
How do you calculate your Coast FIRE number?
Divide your full retirement target by one plus your expected real return, raised to the number of years until retirement. Your full target is usually 25 times your annual retirement spending, following the 4% withdrawal rule. All figures stay in today’s dollars because the return used is after inflation.
For example, spending $50,000 a year in retirement gives a full target of $1,250,000. At age 30, retiring at 65, at a 5% annual real return, the coast number is $1,250,000 divided by 1.05 to the power of 35, about $226,613. Save that much by 30 and growth alone is projected to reach $1,250,000 by 65.
Run your own numbers with our free Coast FIRE calculator: enter your age, retirement age, savings, spending, and assumed return to see your coast number and the monthly contribution needed if you are short.
How is Coast FIRE different from regular FIRE?
Regular FIRE means your portfolio is already large enough to live on today, so you can stop working now. Coast FIRE means your portfolio is large enough to reach that point by retirement age through growth alone, so you keep working but stop saving for retirement.
The gap is enormous. Full FIRE needs $1,250,000 today, while Coast FIRE needs only about $226,613 at age 30. That is why Coast FIRE appeals to people who like their work but do not want to save 50% of their income for a decade. The trade-off is time.
How much do I need to reach Coast FIRE?
It depends on three things: how much you plan to spend in retirement, how many years you have until retirement, and what real return you assume. Younger savers need far less, because compounding has more years to work in their favour.
For a $1,250,000 target at a 5% real return, the coast number is about $177,557 at age 25, $226,613 at age 30, $289,222 at age 35, $369,128 at age 40, and $601,271 at age 50. Every five years you wait, it climbs by roughly a quarter.
If you are building toward your first $100,000, our savings goal calculator maps out the monthly contribution needed. And our net worth calculator shows where you stand today, since only invested assets count.
What return should I assume for Coast FIRE?
Most Coast FIRE calculations use a real return of 5% to 7% a year, meaning the return after inflation, for a diversified stock portfolio. Five percent is a balanced planning assumption, seven percent is optimistic, and three to four percent gives you a safety margin.
The return you pick changes the answer dramatically. At age 30 with a $1,250,000 target, 7% gives a coast number of about $117,079, while 3% pushes it to roughly $443,000. Plan on 5%, treat anything better as a bonus, and revisit your number yearly, since it rises as retirement nears.
What happens after you reach Coast FIRE?
Once you hit your coast number, retirement saving becomes optional rather than mandatory. Many people switch to work they enjoy more, even at lower pay, go part-time, start a business, or redirect former retirement contributions toward a house deposit or travel.
Most planners still suggest keeping a small savings habit as a buffer, since markets do not grow smoothly and a weak decade early on can leave you short. Coast FIRE gives you permission to ease off, not an obligation to stop.
Is Coast FIRE realistic for most people?
Coast FIRE is more realistic than full FIRE for most households, because the target is far smaller and the timeline longer. A 30-year-old with $100,000 invested is already about 44% of the way to a $226,613 coast number, and closing the gap takes about $615 a month.
It still requires real saving early in life, when incomes are lowest and costs like rent and childcare highest. It also assumes you stay invested through crashes without panicking. Coast FIRE rewards early starters, but it is never too late to benefit.
What are the biggest mistakes people make with Coast FIRE?
The most common mistake is assuming an unrealistically high return, such as 10% or more, which makes the coast number look deceptively small. Another is counting money that is not invested, like home equity or cash in a checking account, toward the number.
People also forget taxes and fees, which reduce real returns, and some treat Coast FIRE as permission to quit work, when it only funds retirement at the target age. Keep the number honest and keep earning enough to cover living costs.
What do people ask most about Coast FIRE?
The questions below answer the points that confuse people most about Coast FIRE: whether it means early retirement, what counts toward the number, what happens in a market crash, and how it differs from similar ideas like Barista FIRE. Each answer is short and direct.
Can I retire early once I reach Coast FIRE?
Not on the coast number alone. Coast FIRE funds retirement at your target age, not earlier. Retiring early shortens the compounding runway, so it raises your coast number and usually requires continued saving beyond it.
Does my house count toward Coast FIRE?
No, unless you plan to sell it and invest the proceeds. Only money that is invested and compounding counts, because the entire calculation depends on investment growth doing the work.
What if the market crashes after I stop contributing?
A crash delays the plan but does not necessarily break it, since you have years until retirement for a recovery. Cautious planners use a lower return assumption and keep a small ongoing contribution as insurance.
Disclaimer: This article is for education only, not financial advice. Coast FIRE figures are estimates based on assumed constant returns, ignoring taxes, fees, and market volatility. Consult a qualified financial planner first.
