The 4% Rule: How Much Can You Safely Withdraw?
Key takeaways
- The 4% rule estimates how much you can withdraw from your wealth each year without running out: 4% in the first year, then adjusted for inflation.
- Reversed, it gives your target sum: annual expenses × 25.
- It comes from the US Trinity study and covers a period of around 30 years.
- In Germany you should work more cautiously because of capital gains tax — with 3.0–3.5% or an uplift on the target sum.
The 4% rule is probably the best-known rule of thumb in financial freedom. It answers the central question: how much wealth do I need to live off it? This article explains its origin, the calculation and the German specifics — and is part of our guide financial freedom in 7 levels.
What is the 4% rule?
The 4% rule says that you can withdraw 4% of your invested wealth in the first year and then adjust that euro amount for inflation each year, without your money being used up over a period of about 30 years.
Important: the 4% applies only to the first year. After that, the fixed, inflation-adjusted amount counts — not 4% of the current portfolio value again.
Where it comes from: the Trinity study
The rule goes back to the Trinity study (1998) by three finance professors. They examined historical stock-and-bond portfolios and found: at a withdrawal of 4% a year, capital was preserved in the overwhelming majority of historical 30-year periods — especially with an equity share of at least 50%.
The calculation: annual expenses × 25
Your target sum follows directly from the 4%:
Target sum = annual expenses ÷ 0.04 = annual expenses × 25
| Monthly expenses | Annual expenses | Target sum (× 25) |
|---|---|---|
| €1,500 | €18,000 | €450,000 |
| €2,000 | €24,000 | €600,000 |
| €2,500 | €30,000 | €750,000 |
Work out your personal number directly — including savings rate, returns and German tax:
What is different in Germany
The Trinity study is American and does not know three German rules:
- Capital gains tax (Abgeltungssteuer): investment income is taxed at 25% plus the solidarity surcharge, 26.375% combined (plus church tax, if applicable). Your gross withdrawal therefore has to be higher so that enough is left net. This applies to residents regardless of citizenship.
- Partial exemption (Teilfreistellung): for equity ETFs (more than 50% equities), 30% of the gains are tax-free (§ 20 InvStG). On the gain, you effectively pay around 18.5%.
- Saver’s allowance (Sparer-Pauschbetrag): €1,000 of investment income per person and year stays tax-free. With a large portfolio, that changes little.
A fourth point decides the outcome: only the gain portion of a withdrawal is taxed, not the whole amount. What you paid in comes back tax-free. How much more capital you need therefore depends on how much gain sits in the units you sell.
An example: you need €30,000 a year net and hold an equity ETF.
| Gain share of the withdrawal | Gross withdrawal | Uplift on the target sum |
|---|---|---|
| 50% | around €32,800 | around 9% |
| 75% | around €34,500 | around 15% |
| 100% | around €36,500 | around 22% |
Capital gains tax and solidarity surcharge, 30% partial exemption, €1,000 saver’s allowance, no church tax.
Within a portfolio, units are sold first in, first out (FIFO): the oldest go first, and they usually carry the highest gain. In the early years of withdrawal the gain share therefore tends to be high.
Rule of thumb: in Germany, plan for up to 22% more target sum with equity ETFs — or withdraw more conservatively at 3.0–3.5%. The FIRE calculator cautiously uses this upper value.
If you also have investments taxed in another country, the picture gets more complex — double-taxation agreements exist, but they are not automatic. That is one conversation with a cross-border tax adviser, not something to guess at.
4% or rather 3.5%?
Two risks argue for a slightly more cautious rate:
- Sequence-of-returns risk: if markets fall sharply in the first years of retirement, early withdrawals can weaken the portfolio permanently.
- Longer horizons: anyone stopping at 40 instead of 65 is planning for 40+ rather than 30 years — here 3.25–3.5% is more robust.
Anyone who is flexible (withdrawing less in bad years) can, by contrast, stay closer to 4%.
Limits of the rule
The 4% rule is a rule of thumb, not a guarantee. It rests on historical data, assumes a fixed horizon and ignores taxes, fees and individual spending swings. Use it as a starting point — not as a precise promise.
Frequently asked questions
What does the 4% rule say?
You can withdraw 4% of your invested wealth in the first year of retirement and then adjust that amount for inflation each year, without running out of money over roughly 30 years.
How do I calculate my number from the 4% rule?
Divide your annual expenses by 0.04 — that equals 25 times your annual expenses. With €25,000 of expenses you need €625,000.
Is the 4% rule too optimistic for Germany?
It comes from the US and does not account for German capital gains tax. More cautious in Germany is a slightly lower withdrawal (3.0–3.5%) or a tax uplift on the target sum: up to around 22% for equity ETFs thanks to partial exemption, less depending on the gain share of each withdrawal.
Read on
- Financial freedom: the complete guide in 7 levels
- Calculate your net worth
- Calculate and raise your savings rate
Sources
- Cooley, Hubbard, Walz: Retirement Savings: Choosing a Withdrawal Rate That Is Sustainable (the “Trinity study”, 1998).
- Grant Sabatier: Financial Freedom.
This article is for information only and is not investment or tax advice. Investing in securities carries risks up to and including total loss. Past performance is not a reliable indicator of future results.
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