How to Calculate Your FIRE Number as a European (With EUR Case Studies)

The FIRE (Financial Independence, Retire Early) movement is gaining traction across Europe—but calculating your FIRE number as a European investor requires a tailored approach. This guide will walk you step-by-step through the process, with actionable worksheets, real EUR case studies, and practical considerations for taxes, inflation, healthcare, and currency risk.

By the end, you’ll know your personal FIRE number and how to adjust it for your unique European context.

Step 1: Calculate Your Annual Living Expenses (in EUR)

What to do: Tally all your annual living costs. Be honest and thorough—underestimating here is the #1 FIRE mistake. Use your last 12 months of expenses as a baseline.

• Download your bank/credit card statements or use an app like YNAB or Spendee (both available in Europe).
• Sort expenses into categories: housing, food, utilities, transport, insurance, healthcare, travel, hobbies, etc.
• Include annual recurring expenses (e.g., insurance, holidays) and one-off costs you expect to repeat.

Why it matters: Your FIRE number is a multiple of your annual spending. Inaccurate expenses = misleading FIRE target.

What can go wrong: Forgetting irregular costs, underestimating inflation, or assuming you’ll spend much less in retirement.

Example (Single in Berlin):

• Rent: €900 × 12 = €10,800
• Utilities & Internet: €120 × 12 = €1,440
• Groceries: €250 × 12 = €3,000
• Transport (BVG pass): €86 × 12 = €1,032
• Health insurance (public): €250 × 12 = €3,000
• Leisure, travel, hobbies: €200 × 12 = €2,400
• Other (clothing, gifts, etc.): €1,000
• Total annual expenses: €22,672

Step 2: Adjust for Inflation and Lifestyle Changes

What to do: Project your expenses into the future by adjusting for inflation and any lifestyle upgrades or reductions you expect in retirement.

• European inflation averages 2–3% per year (ECB target is 2%).
• Use the formula: Future Expenses = Current Expenses × (1 + inflation rate)years until retirement
• Factor in changes: Will you move countries? Pay off your mortgage? Need extra healthcare?

Why it matters: FIRE is a long-term plan. Underestimating inflation erodes your purchasing power.

What can go wrong: Using today’s prices for 20–30 years in the future, or ignoring likely lifestyle upgrades (e.g., more travel).

Example: If you plan to retire in 15 years, with 2% inflation:

• Future Annual Expenses = €22,672 × (1.02)15 ≈ €30,546

Step 3: Decide Your Safe Withdrawal Rate (SWR)

What to do: Choose a Safe Withdrawal Rate—the annual % of your investments you’ll withdraw in retirement. The classic “4% rule” comes from US data, but many Europeans use 3.5% or lower for extra safety due to lower expected returns and higher taxes.

• Conservative: 3.0–3.5% (common in Western Europe, especially with high taxes or volatility)
• Aggressive: 4.0% (if you expect strong markets or lower taxes)

Why it matters: A lower SWR means you need a bigger portfolio, but it’s safer against market downturns and longevity risk.

What can go wrong: Using too high an SWR for Europe’s lower equity returns and higher taxes, risking running out of money.

Example: With €30,546 annual expenses and a 3.5% SWR:

• FIRE Number = €30,546 ÷ 0.035 = €872,743

Step 4: Factor in Taxes, Healthcare, and State Pensions

What to do: Adjust your FIRE number for net-of-tax withdrawals, extra healthcare costs, and (optionally) state pension income.

• Estimate your effective tax rate in retirement (can vary by country and investment type—e.g., 26% capital gains tax in Germany, 30% flat in Sweden).
• Account for any mandatory health insurance or private coverage if you retire early.
• Optionally reduce your FIRE number by expected state pension (though many prefer to ignore this for safety).

Why it matters: Gross returns aren’t what you spend—taxes and healthcare can reduce your safe withdrawal amount by 10–35%.

What can go wrong: Ignoring tax drag or healthcare premiums, or overestimating your future state pension.

Example (German single, 27% effective tax rate):

• Net expenses: €30,546 ÷ (1 – 0.27) = €41,848
• FIRE Number: €41,848 ÷ 0.035 = €1,195,657

Step 5: Adjust for Currency and Geographic Risk

What to do: If you plan to retire in a country with a different currency (e.g., retire in Portugal with EUR but invest in USD ETFs), factor in currency risk. Diversify your portfolio to include EUR-denominated assets and global exposure.

• Use accumulating ETFs listed in EUR (e.g., Vanguard FTSE All-World UCITS ETF – EUR Accumulating (IE00BK5BQT80) on Trade Republic or DEGIRO).
• Consider holding some cash or bonds in your target retirement currency.

Why it matters: Currency swings can erode your purchasing power, especially if your investments and expenses are in different currencies.

What can go wrong: Being overexposed to USD assets when you’ll spend in EUR, or vice versa.

Example: If you invest only in USD ETFs and the euro appreciates by 10%, your effective FIRE portfolio shrinks by 10% in EUR terms.

Step 6: Calculate Your FIRE Number (Complete Formula)

Now, combine all the above:

• FIRE Number = (Future Annual Expenses ÷ (1 – Tax Rate)) ÷ Safe Withdrawal Rate

Plug in your numbers using a spreadsheet or calculator.

EUR-Based Case Studies: Singles, Couples, Families

Case Study 1: Single in Spain (Barcelona)

• Rent: €800 × 12 = €9,600
• Groceries: €220 × 12 = €2,640
• Utilities & Internet: €80 × 12 = €960
• Healthcare (private, pre-pension age): €100 × 12 = €1,200
• Transport: €60 × 12 = €720
• Leisure & travel: €150 × 12 = €1,800
• Other: €1,000
• Total annual: €17,920
• Inflation (10 years, 2%): €21,865
• Tax rate in retirement: 20%
• SWR: 3.5%
• FIRE Number = (€21,865 ÷ 0.8) ÷ 0.035 ≈ €782,321

Case Study 2: Couple in the Netherlands (Amsterdam)

• Rent: €1,400 × 12 = €16,800
• Groceries: €400 × 12 = €4,800
• Utilities & Internet: €140 × 12 = €1,680
• Healthcare (mandatory): €260 × 12 = €3,120
• Transport: €120 × 12 = €1,440
• Leisure & travel: €300 × 12 = €3,600
• Other: €2,000
• Total annual: €33,440
• Inflation (15 years, 2%): €45,000
• Tax rate: 25%
• SWR: 3.25%
• FIRE Number = (€45,000 ÷ 0.75) ÷ 0.0325 ≈ €1,846,154

Case Study 3: Family of Four in France (Lyon)

• Rent: €1,200 × 12 = €14,400
• Groceries: €600 × 12 = €7,200
• Utilities & Internet: €180 × 12 = €2,160
• Healthcare (top-up private): €150 × 12 = €1,800
• Transport: €200 × 12 = €2,400
• Childcare & education: €300 × 12 = €3,600
• Leisure & travel: €400 × 12 = €4,800
• Other: €3,000
• Total annual: €39,360
• Inflation (20 years, 2%): €58,513
• Tax rate: 28%
• SWR: 3.25%
• FIRE Number = (€58,513 ÷ 0.72) ÷ 0.0325 ≈ €2,507,754

Common Mistakes

• Ignoring inflation: Leads to a dangerously low FIRE number.
• Underestimating taxes and healthcare: These can be much higher in early retirement.
• Overly optimistic withdrawal rates: Use 3–3.5% for most European scenarios, not 4%.
• Not updating for life changes: Review your expenses and assumptions annually.
• Currency mismatch: Investing in a different currency than your retirement spending increases risk.

Next Steps

• Use the downloadable FIRE Number Calculator to plug in your own numbers.
• Open an account with a European broker like Trade Republic or DEGIRO to start investing towards your FIRE goal.
• Review your expenses and projections every year to stay on track.
• Read more about FIRE-friendly ETFs for European investors.

Disclaimer: This article is for educational purposes only and does not constitute financial advice. Always do your own research and consider consulting a qualified financial advisor before making investment decisions.