Learn
The 4% rule and sustainable withdrawals: how much you can take from your portfolio and when it is not enough
What the 4% rule is, where it comes from, how much capital each withdrawal rate needs and when 4% may not be enough, with a sequence-of-returns example.
In short
- The 4% rule says that withdrawing 4% of your starting portfolio in year one, then adjusting for inflation, would have lasted 30 years in historical US data. It is the same as saving 25 times your yearly spending.
- It is a guideline, not a guarantee: longer retirements, poor early returns, taxes and costs can make 4% too high.
- A lower or flexible withdrawal rate buys safety, at the price of needing more capital or spending less in bad years.
What is the 4% rule?
The 4% rule is a rule of thumb for how much you can spend each year from an invested portfolio without running out. You take 4% of the portfolio in the first year, and in the following years you take the same amount increased by inflation, whatever the market does. Because 4% is one twenty-fifth, the rule is the same as saying you need 25 times your annual spending. It is the number behind the FIRE philosophy.
Where does the 4% rule come from?
It comes from research that tested withdrawal rates against historical US stock and bond returns over rolling 30-year periods, such as the Trinity University study published in 1998, which used data from 1926 to 1995. For a portfolio of roughly half stocks and half bonds, a 4% initial withdrawal, adjusted each year for inflation, would have lasted in the large majority of those 30-year periods. Three things are worth remembering: the data is American, the period is 30 years and the result is about the past, not a promise about the future.
How much capital does each withdrawal rate need?
For annual spending of 30,000 €, the capital you would need changes a lot with the rate you choose:
| Withdrawal rate | Capital needed for 30,000 € a year | Multiple of annual spending |
|---|---|---|
| 3% | 1,000,000 € | about 33 times |
| 3.5% | 857,143 € | about 29 times |
| 4% | 750,000 € | 25 times |
| 5% | 600,000 € | 20 times |
A lower rate is more cautious but needs more capital: going from 4% to 3% adds about a third.
When can the 4% rule fail?
- A longer retirement. The rule was tested over 30 years. If you stop working at 40 or 45, you may need to fund 40 to 50 years, and over such horizons 4% may not be enough.
- Poor returns in the early years. This is called sequence-of-returns risk: withdrawing while the portfolio is falling locks in losses that later gains cannot fully repair.
- Inflation. Prices that rise faster than expected raise the amount you must withdraw every year.
- Taxes and costs. The rule is about gross withdrawals. Tax on gains and fund costs reduce what you actually get to spend.
- Different markets and assets. The studies used US stocks and bonds; a portfolio in other markets, or very different in composition, can behave differently.
- Spending is not constant. Healthcare, a home repair or a family change can raise costs when you least want it.
An example of sequence-of-returns risk
Take a portfolio of 750,000 € from which 30,000 € is withdrawn at the start of each year, in today's money, for 10 years. Use the same ten yearly real returns in two different orders: -20%, -10%, 0%, then 7% for seven years, and the same list reversed. The average is identical, but the order is not:
| Order of returns | Portfolio after 10 years (hypothetical) |
|---|---|
| Losses first, gains later | about 463,000 € |
| Gains first, losses later | about 600,000 € |
The difference is about 137,000 € with the same average return. It is an illustration, not a forecast: it simply shows why falls at the start of retirement matter more than falls at the end.
What are the alternatives to a fixed 4%?
| Approach | How it works | Trade-off |
|---|---|---|
| A lower fixed rate (3% to 3.5%) | Start with a smaller withdrawal for more margin | You need more capital |
| Flexible spending | Cut discretionary spending after bad years and raise it after good ones | Your income varies and you must be able to adapt |
| Guardrails | Adjust the withdrawal only when the rate drifts outside upper and lower limits | More rules to follow and review |
| A cash buffer | Hold one to three years of spending in safer assets so you do not sell after a fall | The buffer earns less and can lose against inflation |
| Some income during retirement | Part-time work or pensions cover part of the costs | Depends on being able to earn or on the pension rules |
Which withdrawal rate should you assume?
These are general considerations, not recommendations.
| Your situation | What it suggests |
|---|---|
| You plan to withdraw for about 30 years | 4% is a common starting point, with a margin and a review each year |
| You plan to withdraw for 40 to 50 years | A more cautious rate, such as 3% to 3.5%, is often used for planning |
| You can cut spending in bad years | A flexible rule can start a little higher |
| You will receive a pension later | Plan the bridge years separately from the years after the pension starts |
| Your spending is hard to reduce | A lower rate and a cash buffer give more safety |
To build the capital in the first place, see a 20-year FIRE plan and try the compound interest calculator. Before any of that, make sure you have an emergency fund. Taxes on withdrawals depend on where you live: see taxes on investing with a foreign broker and check your national rules.
Frequently asked questions
What is the 4% rule?
A guideline that you can withdraw 4% of your starting portfolio in the first year, then adjust for inflation, and it would have lasted 30 years in historical US data. It equals saving 25 times your annual spending.
Is the 4% rule safe?
It is not guaranteed. It describes the past, over 30 years, with a mix of stocks and bonds. A longer retirement, poor early returns, taxes and costs can all make it too high.
Does the 4% rule work in Europe?
The idea applies, but the original research used US markets. European investors should consider their own markets, currencies, taxes and pension systems, and treat 4% as a starting point.
Should I use 3.5% instead of 4%?
A lower rate adds a margin and is often used for longer retirements, but it needs more capital. The right rate depends on your horizon, flexibility and other income.
Does the 4% rule include taxes?
No. It is about gross withdrawals, so what you can spend is lower once tax and costs are paid. Check your own rules or ask a qualified adviser.
What happens if markets fall right after I retire?
That is the sequence-of-returns risk: withdrawals during a fall can permanently reduce the portfolio. A cash buffer, flexible spending or a lower withdrawal rate can reduce the damage.