The 4% Rule: How Much Can You Safely Withdraw in Retirement Each Year
The 4% rule defines the annual withdrawal rate that lets a portfolio last 30 years. How it works, why Europeans need a lower rate, and how to apply it.
Friday, 10 April 2026
You have saved for thirty years. Now what?
You are fifty-eight years old. Three decades of work have built a €400,000 portfolio split between equity and bond ETFs. In two years you want to stop working. The state pension alone will not be enough, and the question keeping you up at night is: how much can I actually withdraw each year without running out of money?
The answer most advisers have given for the past thirty years is the same: 4% annually. It is not an arbitrary figure. It comes from specific research, conducted on historical data, with clearly stated assumptions. Understanding those assumptions is the only way to know whether 4% is right for your situation.
What the 4% rule says
The rule states that a retiree can withdraw 4% of the initial portfolio value in year one, then adjust that nominal amount for inflation in every subsequent year. The probability of not exhausting the portfolio over a 30-year retirement has historically been very high.
Applied to a €400,000 portfolio:
$$W_1 = 400{,}000 \times 0.04 = \text{€16,000 per year}$$
In year two, with 2% inflation:
$$W_2 = 16{,}000 \times 1.02 = \text{€16,320 per year}$$
That is roughly €1,333 per month from a €400,000 portfolio. Combined with state pension income, the total can meaningfully change retirement quality.
Where it comes from: the Trinity Study
The term “4% rule” traces back to a 1998 paper by three professors at Trinity University in Texas: Philip Cooley, Carl Hubbard, and Daniel Walz. Their study, Retirement Savings: Choosing a Withdrawal Rate That Is Sustainable, examined US market data from 1926 through 1995.
The researchers tested withdrawal rates from 3% to 12% across portfolios with varying stock and bond allocations, measuring the probability of portfolio survival over 15 to 30-year horizons. “Success” was straightforwardly defined: the portfolio does not hit zero during the period.
Their most-cited result: a portfolio with 50% stocks and 50% bonds, withdrawing 4% initially and adjusting for inflation, survived in 95 to 100% of all historical 30-year periods tested.
The underlying data was entirely American: S&P 500 returns and US Treasury bond yields, reflecting a century of economic growth and market depth that no other country has matched in exactly the same way.
How it works in practice
The initial withdrawal
The mechanism is straightforward. In year one, you withdraw a fixed percentage of your total portfolio value at the moment of retirement. In every subsequent year, you increase that nominal amount by actual inflation, regardless of how markets perform.
This is the detail most people miss: you are not withdrawing 4% of your current portfolio value each year. You are adjusting the original withdrawal amount by inflation. If the portfolio grows strongly, the withdrawal becomes a smaller fraction of total capital over time. If the portfolio falls, the withdrawal takes up a larger slice of a smaller base.
The compounding effect of inflation over 30 years
At 2% average annual inflation, the nominal withdrawal nearly doubles over 30 years while maintaining the same real purchasing power.
| Year | Cumulative inflation | Nominal withdrawal (from €16,000) |
|---|---|---|
| 1 | 0% | €16,000 |
| 5 | 8.2% | €17,312 |
| 10 | 21.9% | €19,507 |
| 20 | 48.6% | €23,776 |
| 30 | 81.1% | €28,973 |
Assumption: constant 2% annual inflation.
Why equity allocation matters so much
The Trinity Study showed that your stock allocation matters almost as much as your withdrawal rate. Portfolios with little equity tend to run out faster because they do not grow enough to sustain withdrawals across decades.
| Allocation | 30-year success rate (4% withdrawal) |
|---|---|
| 100% bonds | ~20% |
| 50% stocks, 50% bonds | ~95% |
| 75% stocks, 25% bonds | ~98% |
| 100% stocks | ~100%* |
*High success rate, but with extreme volatility that very few investors can sustain emotionally for 30 years.
The European problem: why 4% may not be enough
The Trinity Study used American market data. The United States delivered the best equity returns of any developed market over the twentieth century. Using this data to calibrate withdrawal rules creates a survivorship bias: we are setting the benchmark based on the market that won.
European markets tell a different story. Two world wars, periods of hyperinflation, stock exchanges temporarily shut down or destroyed, currencies devalued. Even setting aside such extreme events, the real annualized return of European equity markets over the twentieth century was meaningfully lower than the US equivalent.
Research by Professor Wade Pfau (2010) examined safe withdrawal rates across developed markets using historical data from 1900 to 2008. For European markets, the safe withdrawal rate was typically between 2.8% and 3.5%, with a median around 3.3%.
For investors in Europe, two additional variables matter.
Taxes. In most European countries, capital gains from investment funds are taxed when realized. Every withdrawal that includes a gain component is reduced by this tax. If half your withdrawal represents realized gains taxed at 26%, your after-tax amount is reduced by approximately 13%:
$$W_{\text{net}} = W_{\text{gross}} \times (1 - g \times 0.26)$$
where $g$ is the fraction of each withdrawal consisting of realized capital gains.
Longevity. Life expectancy in many European countries is among the highest globally. A retiree who stops working at sixty may need to plan for 35 to 40 years, not 30. As the horizon lengthens, the probability of success at 4% drops substantially.
What withdrawal rate makes sense for European investors?
Taking these structural factors into account, three scenarios are reasonable for someone building retirement income from a globally diversified portfolio:
| Scenario | Rate | Annual withdrawal (€400,000) | Best suited for |
|---|---|---|---|
| Conservative | 3.0% | €12,000 | 35-40 year horizon, maximum caution |
| Moderate | 3.5% | €14,000 | 30-year horizon, good balance |
| Optimistic | 4.0% | €16,000 | 25-year horizon, favorable conditions |
The 3.5% rate is frequently cited as the right balance for European investors with a 30-year horizon. It reflects the historical record of European markets more accurately than the 4% figure calibrated on American exceptionalism.
For portfolios with a 60 to 70% global equity allocation, 3.5% holds up across most historical scenarios. For those with heavier bond exposure, 3% provides a more comfortable margin.
Alternative withdrawal strategies
The 4% rule is a framework, not a fixed prescription. Several variations make it more adaptable to actual conditions.
Constant percentage withdrawal
Instead of fixing the first-year amount and adjusting it for inflation, you withdraw the same percentage of your current portfolio value every year. If the portfolio is worth €400,000 you withdraw €14,000 (at 3.5%). If it falls to €320,000 you withdraw €11,200.
Advantage: the portfolio never technically runs out, because the withdrawal self-adjusts to market conditions. Disadvantage: income becomes unpredictable at exactly the point in life when predictability matters most.
Guyton-Klinger guardrails
Two trigger points on the real withdrawal rate:
- If the current withdrawal exceeds 120% of the initial rate, reduce it by 10%.
- If it falls below 80% of the initial rate, increase it by 10%.
This combines income stability with an automatic adjustment that reduces exhaustion risk in bad market stretches. It requires periodic monitoring but is manageable for an individual investor with a spreadsheet.
Floor-and-ceiling rule
Set a guaranteed minimum withdrawal and a permitted maximum. Below the floor, you do not cut further even if the portfolio falls. Above the ceiling, you do not increase further even if the portfolio grows substantially. Between the two, you adjust for inflation as in the standard rule.
Time horizon changes everything
The 4% rule’s success rate is calculated over 30 years. Change the horizon and the numbers shift significantly.
| Horizon | 3.0% rate | 3.5% rate | 4.0% rate |
|---|---|---|---|
| 20 years | ~99% | ~98% | ~96% |
| 30 years | ~97% | ~93% | ~87%* |
| 40 years | ~90% | ~82% | ~72% |
*Estimates based on historical global data analysis, not guaranteed projections.
Someone retiring at fifty-five with life expectancy to ninety-two is looking at a 37-year horizon. At that length, 4% does not provide the safety margin most people assume. A rate of 3 to 3.5% becomes the more defensible choice.
FAQ
Does the 4% rule account for state pension income?
No. The rule applies only to your personal investment portfolio. State pension income is separate. If your annual expenses total €30,000 and your pension covers €18,000, you need €12,000 from your portfolio. That corresponds to 4% of a €300,000 portfolio, or 3% of a €400,000 one. Pension income meaningfully reduces the portfolio size you need.
What is sequence-of-returns risk and why does it matter?
Sequence-of-returns risk is the danger that a large market decline in the first years of retirement permanently damages your portfolio. Selling shares at depressed prices to fund withdrawals locks in losses and reduces the capital base for future recovery. The same average return over 30 years produces very different outcomes depending on whether the bad years come early or late.
Should I calculate the withdrawal on gross or net portfolio value?
On gross value. Taxes apply at the moment of withdrawal, not to the portfolio’s book value. Keep in mind, however, that every withdrawal including capital gains reduces your net amount. Budget using the after-tax figure so you are not surprised by smaller-than-expected deposits.
Does the 4% rule work in a low-rate or high-inflation environment?
In a structurally low-rate environment, the bond portion of the portfolio earns less, compressing total returns. With high equity valuations and compressed bond yields, some researchers put the safe rate at 3 to 3.3%. The practical answer is to start conservatively at 3.5% and adjust based on actual portfolio performance in the early years.
How do I find my required portfolio size?
Divide your desired annual withdrawal by your chosen rate. This is sometimes called the 25x rule at 4%: multiply your desired annual income by 25. At 3.5%, multiply by approximately 28.6. At 3%, multiply by 33.3. A €20,000 annual need from investments therefore requires €500,000 at 4%, €571,000 at 3.5%, or €667,000 at 3%.
Next step
Your sustainable withdrawal rate depends on your specific portfolio allocation, your actual time horizon, and your tax situation. There is no single number that works for everyone.
With Wallible you can run realistic withdrawal simulations on your actual portfolio:
- Analyse your portfolio with historical backtesting, risk metrics, and Monte Carlo simulation
- Read the guide to ETF taxation to calculate your real after-tax withdrawal
- Explore the lazy portfolio guide to build the allocation that supports your withdrawal plan
