πŸ„ Coast FIRE Guide

What is Coast FIRE?

The portfolio amount where you can stop saving and let compound growth do the rest β€” reaching full financial independence by retirement age on autopilot.

What is Coast FIRE?

Coast FIRE is a milestone, not a finish line. It's the point where you have enough money invested today that β€” even if you never contribute another dollar β€” compound growth will carry your portfolio to your full FI Number by your target retirement age.

Once you hit Coast FIRE, you've "coasted" to financial independence. You still need to earn enough to cover your current living expenses, but you no longer need to save or invest anything extra. The math does the heavy lifting from here.

Coast FIRE formula:

Coast FI Number = FI Number Γ· (1 + annual return)^years to retirement

Example: FI Number of $1M, 7% return, 20 years to retirement
Coast FI = $1,000,000 Γ· (1.07)^20 = $258,419

Why Coast FIRE is a powerful milestone

For most people on the FIRE journey, full financial independence feels far away. Coast FIRE gives you an earlier, very meaningful milestone to aim for β€” and hitting it changes your relationship with money and work significantly.

Coast FIRE and CPP/OAS

For Canadians, Coast FIRE math gets more nuanced because CPP and OAS reduce how large your portfolio needs to be at retirement. This means your Coast FI target is lower than it appears if you're planning to take government benefits.

FireCA calculates a two-phase FI Number β€” Phase 1 (before CPP/OAS) and Phase 2 (after benefits begin). Your Coast FIRE number uses the Phase 1 FI Number as the target, which gives you the most conservative and robust estimate.

Example: If your full FI Number is $1.2M but your Phase 2 FI Number (with CPP + OAS) is $800K, the compound growth needed to "coast" to retirement is substantially less than the surface number suggests.

Coast FIRE by age β€” example scenarios

Current AgeRetire atFI NumberReturnCoast FI Target
3055$1,000,0007%$184,249
3555$1,000,0007%$258,419
3560$1,000,0007%$184,249
4060$1,000,0007%$258,419
4055$1,500,0006%$524,940
4565$1,000,0007%$258,419

Notice how time and return rate dramatically affect the Coast FI target. The more runway you have, the less you need today.

What do you do after hitting Coast FIRE?

Once you've hit your Coast FI number, you have real options. The most common approaches are:

⏸️

Stop contributing

Redirect all savings toward current lifestyle or experiences. Let the portfolio grow untouched to retirement.

πŸ”„

Shift careers

Take lower-paying work you enjoy. Only need to cover living expenses β€” no need to save extra anymore.

⏱️

Keep saving anyway

Continue saving to reach full FI sooner, retire earlier, or build a larger buffer. Coast FI is a floor, not a ceiling.

πŸ“‰

Go part-time

Reduce hours to cover expenses only. The flexibility of Coast FIRE makes part-time work genuinely sustainable.

Find your Coast FIRE number

FireCA calculates your Coast FI target alongside your full FI Number, with real CPP, OAS, RRSP, TFSA, and LIRA math built in.

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