The hard part of retirement is not the balance on the last day of work. It is whether that balance can pay a rising bill for as long as you need it. A withdrawal rate is the first year’s spending divided by the portfolio. Around 4 percent is a checkpoint for a long retirement, not a rule that fits every household.
Spending rises even if your lifestyle does not
Once a year the portfolio earns the return you entered, then that year’s spending comes out. Next year’s spending is higher by the inflation rate, so the withdrawal keeps its buying power. A portfolio can grow in the early years and still fail later if inflation lifts the withdrawal faster than the investments replace it.
Subtract Social Security and pensions from spending before you enter the withdrawal. The portfolio should not be asked to cover income it does not have to cover. Taxes can apply to withdrawals from traditional accounts. The spending figure should be what leaves the portfolio, including the tax.
A steady return hides the real risk
This tool uses one return every year. Real retirements get good and bad years in an unknown order. Poor years early, while you are withdrawing, do more damage than the average suggests. A plan that barely lasts on a smooth line is fragile.
The 4 percent idea comes from historical studies of diversified portfolios over about 30 years. A higher starting rate, a longer horizon, or heavy fees makes it less reliable. A pension or a shorter horizon can make a higher rate reasonable. The calculator will not know which one you have unless you put it in the spending number.
If the line hits zero, change the spending
If the plan runs out, cut the first-year spending or delay retirement. Do not fix it only by typing a higher return. Run the expected return, then run a lower one. The second result tells you how much cushion you have.
Home equity is not a monthly withdrawal unless you have a real plan to use it. A plan that ends with a large balance may support more spending, or it may be the cushion that survives a worse market. Treat that leftover as information, not as money you failed to enjoy.
How to use the retirement drawdown calculator
The withdrawal rate is the first year’s spending divided by the portfolio. Around 4% is a common planning checkpoint for a 30-year retirement, not a rule that fits every mix of investments. The chart shows the balance after growth and after each year’s rising withdrawal. If the line hits zero, that year is when the plan runs out under these assumptions.
- Enter the portfolio you will have when withdrawals start.
- Enter the spending you need in the first year, before Social Security or other income reduces it.
- Set a return and an inflation rate. Spending rises with inflation each year.
- See whether the balance lasts the full horizon or the year it hits zero.
How the math works
Growth, then spending
Once a year the portfolio earns the return you entered, then that year’s spending comes out. Next year’s spending is higher by the inflation rate. A portfolio can grow in the early years and still fail later if inflation lifts the withdrawal.
The 4% checkpoint
The idea, from historical studies of diversified portfolios, is that a starting withdrawal near 4%, raised with inflation, often lasted 30 years. It can fail in a long period of poor returns, and it can be too cautious if you have a pension or a shorter horizon.
Sequence of returns
This tool uses one steady return. Real retirements get good and bad years in an unknown order. Bad years early, while you are withdrawing, do more damage than the average suggests. Treat a plan that barely lasts as fragile.
$1.2 million and $48,000 a year
The defaults withdraw $48,000 in year one, earn 6%, raise spending 2.5% a year, and look out 30 years.
The first withdrawal is 4% of the portfolio. Under a steady 6% return the money lasts the full 30 years and the ending balance is still about $1.89 million. That cushion would shrink quickly if the return were lower or the first bad years arrived early.
Terms worth knowing
- Withdrawal rate
- First-year spending divided by the starting portfolio.
- Inflation adjustment
- Spending rises each year so the withdrawal keeps its buying power.
- Depletion
- The year the balance hits zero and the plan can no longer pay the withdrawal.
- Sequence risk
- The extra damage from poor investment returns early in retirement, which this steady-return model does not show.
What to do with the number
Subtract Social Security and pensions from spending before you enter the withdrawal. The portfolio should not be asked to cover income it does not have to cover.
If the plan runs out, cut the first-year spending or delay retirement. Do not fix it only by raising the return.
A plan that ends with a huge balance may support more spending, or it may be the cushion that survives a worse market.
Taxes can apply to withdrawals from traditional accounts. The spending figure should be what leaves the portfolio, including the tax.
Questions people ask
What this leaves out
The return is the same every year. Sequence of returns is not modeled.
Spending rises once a year with inflation and is taken after that year’s growth.
Taxes, fees, and one-time expenses are not included.
Social Security is not added unless you have already reduced the withdrawal by that income.
These figures are estimates to help you understand the tradeoff. They are not tax, legal, insurance, or investment advice. A fiduciary can look at the same numbers in the context of the rest of your plan.