FIRE Number by Age — How Much Should You Have Saved?
The FIRE number itself — the portfolio value at which you can retire — has nothing to do with your age. It's purely a function of your annual expenses and your chosen withdrawal rate. A 30-year-old and a 50-year-old with the same spending level have the same FIRE number.
What age does affect is how far along you are, how much runway you have to compound your savings, and what withdrawal rate makes sense given how many decades your portfolio needs to last. A 35-year-old retiring early is planning for a 50+ year retirement, which calls for more conservative assumptions than someone retiring at 60.
The FIRE Number Calculator calculates your personal target and projects years to reach it. This article walks through realistic milestones by age and how to interpret where you stand.
The Foundation: What Your FIRE Number Is
Before looking at milestones, the formula:
FIRE number = annual expenses × 25 (at a 4% withdrawal rate)
If you spend $50,000/year, your FIRE number is $1,250,000. If you spend $80,000/year, it's $2,000,000. If you spend $40,000/year, it's $1,000,000.
The multiplier changes based on the withdrawal rate you use. For early retirees planning a 40–50 year retirement, many FIRE planners use 3.5% (×28.6) or 3% (×33.3) to add a safety margin:
| Annual expenses | FIRE at 4% (25×) | FIRE at 3.5% (28.6×) | FIRE at 3% (33.3×) |
|---|---|---|---|
| $30,000 | $750,000 | $858,000 | $999,000 |
| $40,000 | $1,000,000 | $1,144,000 | $1,332,000 |
| $50,000 | $1,250,000 | $1,430,000 | $1,665,000 |
| $60,000 | $1,500,000 | $1,716,000 | $1,998,000 |
| $80,000 | $2,000,000 | $2,288,000 | $2,664,000 |
| $100,000 | $2,500,000 | $2,860,000 | $3,330,000 |
Progress Benchmarks: What's on Track?
There's no universal "right" amount to have saved by any given age, because it depends entirely on your income and savings rate. But a common benchmark in FIRE communities is a multiple of annual expenses — not annual income, which is what traditional retirement planning often uses.
By annual expenses accumulated:
- 1× annual expenses: Early stages, typically reached in the first 5–10 years of serious saving
- 5× annual expenses: Roughly 20% of the way to a 25× FIRE target — meaningful progress, portfolio compounding starting to matter
- 10× annual expenses: 40% of the way — you're genuinely building something substantial
- 15× annual expenses: 60% of the way — the end starts to come into view
- 20× annual expenses: Coast FIRE territory in many scenarios — portfolio may reach 25× through growth alone
- 25× annual expenses: Full FIRE
The power of this framing: it's independent of income. A $50,000 earner with 10× saved ($500,000) is in the same relative position as a $200,000 earner with 10× saved ($2,000,000). Both are 40% of the way to their respective FIRE numbers.
Age-Based Context for FIRE Progress
While the FIRE number itself isn't age-dependent, here's how realistic progress tends to look across age ranges for people actively pursuing FIRE:
Early 20s: Building the Foundation
Most people in their early 20s are starting from zero or near-zero, often with student debt, lower incomes, and early career volatility. The priority at this stage isn't portfolio size — it's building the savings habit, eliminating high-interest debt, and maximizing tax-advantaged contributions.
If you can save 20–30% of income in your early 20s and invest it in low-cost index funds, you're ahead of schedule. Having 1–2× annual expenses saved by 25 is a strong position. Compounding does most of its work over decades, so time in market matters enormously at this stage.
Late 20s to Early 30s: Acceleration Phase
This is typically when income starts rising meaningfully and lifestyle costs are still relatively controlled — no mortgage yet, possibly no children. This window is valuable.
Someone who graduated at 22 with no debt and saved consistently might have 3–6× annual expenses by age 30. Someone who carried student debt or had a slow start might have 1–3×. Both are workable positions if the savings rate is high enough going forward.
A reasonable target for a 30-year-old pursuing FIRE: 3–6× annual expenses invested, with a savings rate of 30–50%.
Mid-30s: Where Progress Becomes Visible
By 35, a consistent saver should have 5–10× annual expenses accumulated. At this level, the portfolio starts to compound meaningfully. A $300,000 portfolio growing at 7% real adds $21,000 without any new contributions. A $500,000 portfolio adds $35,000. This "invisible income" starts to accelerate the timeline significantly.
This is also typically when people are at their highest career earnings relative to expenses, making it the most powerful accumulation phase for most FIRE seekers. Lifestyle inflation is the main risk — housing, children, and consumption pressure all tend to increase in the mid-30s.
If you're 35 with 8–10× annual expenses saved and a savings rate above 30%, you're in a strong position to reach FIRE in your mid-to-late 40s.
40s: The Home Stretch
Someone who started saving seriously in their 20s and maintained a high savings rate should be at 12–20× annual expenses by their mid-to-late 40s. The portfolio is large enough that growth is doing significant heavy lifting.
At 15× expenses, the portfolio itself may be adding as much each year (at 7% return) as new contributions. At 20×, it's almost certainly adding more than new contributions. This is the compounding inflection point — you're close enough that the endpoint is clearly in sight.
A 45-year-old with 15× expenses saved and earning 7% real returns needs roughly 5–7 more years of moderate savings to reach 25×, even with a slowdown in contributions.
50s and Beyond: Traditional Retirement Range
For people who started the FIRE journey later or who are targeting a somewhat traditional retirement age, the 50s and early 60s are when full FIRE numbers become attainable. Someone targeting a 35-year retirement (retire at 60, plan to 95) can use a closer to 4% withdrawal rate with more confidence than someone retiring at 40.
If you're 55 with 18–20× annual expenses and on track to reach 25× by 60–62, you're in excellent shape by any measure.
The Withdrawal Rate Decision by Age
The earlier you retire, the longer your portfolio needs to last, and the more conservative your withdrawal rate should be:
| Retirement age | Retirement horizon | Suggested withdrawal rate |
|---|---|---|
| 35 | ~55 years | 3.0–3.25% (30–33× expenses) |
| 40 | ~50 years | 3.25–3.5% (28–31× expenses) |
| 45 | ~45 years | 3.5–3.75% (27–29× expenses) |
| 50 | ~40 years | 3.75–4.0% (25–27× expenses) |
| 55 | ~35 years | 4.0% (25× expenses) |
| 60+ | ~30 years | 4.0–4.5% (22–25× expenses) |
These are conservative guidelines. Many FIRE practitioners are comfortable with higher withdrawal rates because they plan to spend flexibly — reducing withdrawals in down market years and increasing them when markets are strong. The rigid 4% rule is a worst-case planning tool, not a spending mandate.
How Inflation Changes the Target Over Time
One thing the basic FIRE number calculation doesn't capture: your expenses in retirement will be higher in nominal dollars than they are today, because of inflation.
If you plan to retire in 15 years and currently spend $60,000/year, your expenses at retirement (at 3% inflation) will be about $93,000/year in nominal terms. Your FIRE number at that future expense level would be $2,325,000 — not $1,500,000. The Inflation Calculator can help you project what today's expenses become in future dollars.
In practice, most FIRE calculations work in real (inflation-adjusted) returns — using a 5–7% real return assumption rather than 8–10% nominal. If you use real returns throughout, your FIRE number in today's dollars is what matters, and you don't need to adjust separately for inflation.
The FIRE Number Calculator projects years to FIRE based on your current savings, annual contributions, and expected real return — giving you a clear picture of where you stand and how adjustments to savings rate or expenses change the timeline.
