Your savings rate is the single most powerful variable in your financial independence timeline. A 10% savings rate puts retirement 40+ years away. A 50% savings rate gets you there in 17 years. Use this calculator to find your current rate and FI timeline.
Quick answer
Savings rate = (income − expenses) ÷ income × 100. At a 20% savings rate, financial independence (25x expenses) takes approximately 37 years. At 30%, it takes 28 years. At 50%, it takes 17 years. NZ average household savings rate is approximately 3–7% — well below what's needed for early financial independence. KiwiSaver contributions count toward your savings rate.
Savings rate = (income − expenses) ÷ income × 100. At a 20% savings rate, financial independence (25x expenses) takes approximately 37 years. At 30%, it takes 28 years. At 50%, it takes 17 years. NZ average household savings rate is approximately 3–7% — well below what's needed for early financial independence. KiwiSaver contributions count toward your savings rate.
Savings Rate Calculator
KiwiSaver is deducted before take-home — add it back in
Savings Rate Benchmarks
| Savings rate | Assessment | Years to FI (approx.) |
|---|---|---|
| < 5% | Danger zone — barely keeping up with inflation | 60+ years |
| 5–10% | Below average — slow wealth accumulation | 45–60 years |
| 10–20% | Average NZ saver | 35–45 years |
| 20–30% | Good — meaningfully building wealth | 28–35 years |
| 30–40% | Very good — ahead of most New Zealanders | 22–28 years |
| 40–50% | Excellent — strong FIRE-path candidate | 17–22 years |
| 50%+ | Aggressive FIRE track | 10–17 years |
Based on 8% annual return, starting from zero. Existing savings compress the timeline further.
What Counts as “Savings”?
Include in your savings rate calculation:
- KiwiSaver employee contributions (deducted before take-home)
- KiwiSaver employer contributions (free money — absolutely counts)
- Extra mortgage repayments above minimum (builds equity — a form of saving)
- Index fund / investment contributions
- Cash savings into savings accounts
Don’t include:
- Minimum mortgage payments (only the principal portion is savings; interest is an expense)
- Sinking fund spending (saving for a known expense is not wealth-building saving)
The 25x Rule: Your FI Number
The “25x rule” (also known as the FI Number) is derived from the 4% withdrawal rule:
- Estimate your annual expenses in retirement
- Multiply by 25
- That’s the portfolio value that supports your lifestyle indefinitely
Example: $60,000/year expenses × 25 = $1,500,000 FI number
At $1.5M, you can withdraw 4% ($60,000) per year, with historically high probability of the portfolio lasting 30+ years.
NZ context: NZ Super (~$27,800/year single, 2026) reduces your required FI number.
- If you plan to claim NZ Super at 65: ($60,000 − $27,800) × 25 = $805,000 required from investments
- Earlier retirement (before 65) requires a larger portfolio to bridge to NZ Super age
FIRE Variants for New Zealanders
| FIRE type | Target | NZ relevance |
|---|---|---|
| LeanFIRE | Low expenses, ~$40–50k/year | Requires ~$1M–1.25M; regional NZ viable |
| Regular FIRE | ~$60–80k/year | Requires ~$1.5–2M; main centres |
| FatFIRE | $100k+/year | Requires $2.5M+; high earners |
| BaristaFIRE | Part-time work + investments | Popular compromise — work casually, invest |
| CoastFIRE | Stop contributing, let compound growth reach FI | Achievable mid-30s with early starting balance |