Coast FIRE is the middle ground between full Financial Independence and traditional retirement. Instead of aiming for financial independence at 40, you reach a "Coast" point where your current investments will grow to your target by retirement age—without adding another dollar. Then you stop saving, reduce hours, and coast on compound growth.
The Coast FIRE Math
If you have $500,000 invested at age 45, and assume 7% annual returns, by age 65 (20 years) that $500,000 becomes $1.93 million. If your retirement target is $2 million, you've almost hit it without saving another cent. At 45, you could switch to part-time, a lower-stress job, consulting, or even sabbatical—and still reach your goal.
This is profoundly different from working until 65. You get 20 years of lifestyle flexibility and reduced work stress, while still reaching financial independence.
Australian Advantages for Coast FIRE
- Superannuation: Super compounds tax-efficiently at 15% on earnings (vs. your marginal rate). By age 45-50, your super can be substantial and on autopilot.
- Franking credits: If you hold Australian dividend stocks, the franking credits reduce your tax and boost returns.
- Negative gearing: If your investments run at a loss, you can claim the loss against income—useful in early years of Coast FIRE.
- Flexible super withdrawals: Once you reach preservation age (55-67), you can access super gradually, not as a lump sum.
The Coast FIRE Lifestyle
Coast FIRE isn't about stopping work entirely. It's about optimizing for quality of life while wealth compounds. Common moves:
- Drop to 4 days/week: Maintain income for living expenses, but gain a 3-day weekend.
- Switch to consulting: Trade job security for flexibility and higher hourly rates.
- Pursue passion projects: Use your skills part-time while building a side interest (writing, coaching, creative work).
- Sabbatical: Take 6-12 months off every 3-5 years. With costs covered by investments, a sabbatical is just a math calculation.
- Relocate: Move somewhere with lower cost of living, convert your income further.
Coast FIRE vs. Traditional Retirement
| Metric | Coast FIRE at 50 | Traditional Retirement at 65 |
|---|---|---|
| Years working at full capacity | 25-30 | 40 |
| Work stress in final years | Minimal | High |
| Wealth at retirement | $2-3M | $1.5-2.5M (similar, with less compounding) |
| Retirement lifestyle quality | High (fewer years of work pressure) | Moderate (long working years) |
Risks & Considerations
Coast FIRE is powerful, but not without risks. If markets crash the year after you switch to part-time, your wealth won't grow on schedule. You'll need to resume full-time work or adjust expectations.
Build a buffer: Don't cut to part-time the moment your coast calculation works. Aim for 20-30% extra in your coast number, so a downturn won't derail you.