Most retirement advice follows the same script: save as much as possible for as long as possible, then retire. Coast FIRE flips that script — and for many Canadians, it’s a far more realistic path to financial freedom.
Coast FIRE is a retirement strategy where you invest enough money early in life that — even if you never contribute another dollar — your portfolio will grow on its own to fully fund your retirement by your target age. Once you hit your “Coast FIRE number,” you only need to earn enough to cover your current living expenses. The rest takes care of itself.
How Coast FIRE Works
The engine behind Coast FIRE is compound interest. When you invest money in a diversified portfolio, it grows over time — and the growth itself generates more growth. The longer you leave money untouched, the more powerful this effect becomes.
Coast FIRE takes advantage of this by front-loading your investing. Instead of saving steadily throughout your career, you save aggressively early on to hit a target number. Once you reach that number, you can “coast” — scale back your contributions, take a lower-stress job, work part-time, or simply stop worrying about retirement savings entirely.
The key insight: time in the market is doing the heavy lifting, not your ongoing contributions. A dollar invested at 30 does far more work than a dollar invested at 50, because it has 20 more years to compound.
Coast FIRE vs. Traditional FIRE
Coast FIRE is part of the broader FIRE movement, but it has a distinct and more accessible goal. Here’s how it compares:
| Strategy | Goal | What happens after? | Typical timeline |
|---|---|---|---|
| Traditional FIRE | Accumulate 25× annual expenses; retire completely | Stop working entirely, live off portfolio withdrawals | 10–20 years of extreme saving |
| Coast FIRE | Invest enough that compound growth handles retirement on its own | Continue working, but only to cover current expenses — no more saving required | Achievable much earlier, often in your 30s |
Coast FIRE doesn’t mean you stop working — it means you stop needing to save for retirement. That distinction creates enormous flexibility. Many people who reach Coast FIRE stay in their careers but negotiate better hours, switch to more meaningful but lower-paid work, or simply feel a profound shift in how they relate to their job.
How to Calculate Your Coast FIRE Number
Your Coast FIRE number is the amount you need invested today so that it grows to cover your full retirement needs by your target retirement age — with no additional contributions.
The calculation works in two steps:
Step 1 — Your retirement number: How much you’ll need at retirement. Using the 4% safe withdrawal rule, divide your expected annual retirement spending by 0.04. If you plan to spend $60,000 per year, your retirement number is $1,500,000.
Step 2 — Your Coast FIRE number: Discount that retirement number back to today using your expected real rate of return (investment return minus inflation) over the years until retirement. The earlier you are, the smaller the number you need today, because you have more years of compound growth ahead.
Rather than work through the math manually, use the Coast FIRE Calculator — it handles both steps instantly, and works for both Canadian and US retirement accounts.
How Canadian Accounts Fit Into Coast FIRE
One of the biggest advantages Canadians have in pursuing Coast FIRE is access to two powerful registered accounts: the RRSP and the TFSA. Used strategically, they can dramatically accelerate how quickly you reach your Coast FIRE number.
Which account should you prioritize?
For most Canadians pursuing Coast FIRE, a practical approach is to maximize TFSA first if you’re in a lower tax bracket, or RRSP first if you’re in a higher bracket and expect to be in a lower bracket at retirement. Many people benefit from using both.
The key point: money inside a TFSA or RRSP compounds without being eroded by annual taxes, which is a significant advantage over non-registered accounts when your goal is long-term growth. When calculating your Coast FIRE number, count the total across all your invested accounts — RRSP, TFSA, and non-registered combined.
A Real Canadian Example
Her situation: Sarah is 32, plans to retire at 65, and expects to spend $55,000 per year in retirement (in today’s dollars). She currently has $60,000 invested across her TFSA and RRSP. She assumes a 7% investment return and 2.5% inflation (4.5% real return), and expects roughly $12,000 per year from CPP and OAS.
Her retirement number: She needs to cover $43,000 per year from her own savings ($55,000 − $12,000 government benefits). At a 4% withdrawal rate, her retirement number is $1,075,000.
Her Coast FIRE number: With 33 years of compounding ahead, she needs approximately $230,000 invested today to reach $1,075,000 by age 65 — without contributing another dollar.
Where she stands: Sarah has $60,000 invested. She needs to grow that to $230,000. At her current savings rate, she could reach Coast FIRE in roughly 8–10 years — at age 40–42. After that, she’d only need to earn enough to cover her living expenses.
What Happens After You Reach Coast FIRE?
Reaching your Coast FIRE number doesn’t mean you retire tomorrow — it means you’ve bought yourself options. Common paths people take after hitting Coast FIRE include:
- → Staying in their current job but feeling dramatically less stressed about money
- → Transitioning to part-time work or contract roles
- → Switching to lower-paying but more meaningful work
- → Taking extended time off or a sabbatical
- → Continuing to save (which means arriving at retirement with more than needed)
The defining characteristic of Coast FIRE isn’t what you do after — it’s the psychological shift. When you know retirement is already funded, every career decision becomes a choice rather than a necessity.
Key Takeaways
- Coast FIRE means investing enough today that compound growth alone will fund your retirement — no further contributions needed
- Your Coast FIRE number depends on your retirement spending target, years until retirement, and expected real rate of return
- Canadian accounts (RRSP and TFSA) are powerful tools for reaching Coast FIRE faster, thanks to tax-sheltered compounding
- CPP and OAS reduce how much your portfolio needs to cover, which lowers your Coast FIRE number
- After reaching Coast FIRE, you only need to earn enough to cover current expenses — not save for the future
- Coast FIRE is more achievable than traditional FIRE and can be reached in your 30s or early 40s with disciplined early investing