Withdrawal Rate Calculator

Use this withdrawal rate calculator to see the yearly and monthly income a portfolio provides at any withdrawal rate. Test the 4% rule against your numbers.

What it does

The Withdrawal Rate Calculator turns a portfolio value and an annual withdrawal rate into the income that portfolio could provide. It shows how much you could draw each year and each month at the rate you choose.

Data sources & parameters

This calculator uses standard financial formulas and runs entirely in your browser. It needs no external rate data — your result is computed only from the values you enter above.

We always strive to use the latest data for every variable so our results and reports are as accurate as possible. Even so, errors are possible — you should not rely on this tool or its report alone, and we accept no liability for any decision made based on it.

The formula

annual_withdrawal = portfolio_value × withdrawal_rate ÷ 100; monthly_withdrawal = annual_withdrawal ÷ 12

How it works

The calculator multiplies your portfolio value by your withdrawal rate to find the annual withdrawal, then divides that by twelve to show the monthly figure. A lower rate stretches the portfolio further; a higher rate raises income but the risk of running out.

Where it is used

Estimating retirement income from a savings pot
Testing a safe withdrawal rate such as 4% against your own numbers
Comparing how different rates change the income a portfolio provides

Worked example

A retiree holds $1,000,000.00 and applies a 4% withdrawal rate. That produces … of income a year, or … a month.

What the withdrawal rate calculator does

The withdrawal rate calculator shows how much income a portfolio can provide. You enter the value of your savings and the annual rate at which you plan to draw from it, and the tool shows the yearly and monthly income that rate produces, a figure you can plan a budget around.

The withdrawal rate links the size of your savings to the lifestyle it can support. Too high a rate and the money may not last; too low and you may live more frugally than you need to.

How a withdrawal rate works

A withdrawal rate is the percentage of your portfolio you take out in a year. Multiply the portfolio value by the rate for the annual withdrawal, then divide by twelve for the monthly amount.

The choice matters over many years. A portfolio that stays invested keeps growing, and a modest withdrawal rate can often be covered by returns, leaving the capital broadly intact. A high rate eats into the capital itself, especially if markets fall early in retirement, so the rate you choose is a bet on how long the money must last and how markets behave along the way.

The 4% rule

The best-known benchmark came from historical studies of what percentage a retiree could have withdrawn each year, adjusted for inflation, without running out of money over a long retirement. For a balanced portfolio, roughly 4% survived even difficult historical periods.

It gives a memorable starting point for first-year income, but it assumes a particular investment mix, a particular retirement length, and a willingness to hold steady through market swings. Treat it as a reference point.

Why the right rate depends on you

A longer retirement needs a lower rate, because the money has to stretch across more years and market cycles. Someone retiring early may want a rate below 4%, while someone retiring later might comfortably use more.
A portfolio weighted towards growth assets has more long-term potential but more volatility; a very conservative one may not grow enough to support a high rate over decades.
If you can cut back in poor market years, you can afford a higher average rate. If your spending is fixed, a more cautious rate protects you.
A pension or other guaranteed income reduces how much your portfolio has to provide, which can allow a more relaxed rate on the remainder.

How to use the calculator

Enter your portfolio value.
Enter the withdrawal rate you want to test.

The tool shows your annual withdrawal and the monthly equivalent. Try 3%, 3.5%, 4%, and 5% in turn; a single percentage point can change your annual income substantially.

You can also work backwards: adjust the rate and portfolio value until the annual withdrawal matches the income you need, which shows the rate your savings would have to sustain or the portfolio size you would need.

Reading the results

The figures are a snapshot at one rate and one portfolio value. The same rate applied to a portfolio that has grown produces more income, and to a fallen portfolio less. Inflation steadily raises the amount needed for the same lifestyle, which is why many withdrawal strategies raise the amount each year instead of keeping the rate fixed. Use the calculator to weigh income today against security later, and to check whether a savings target is realistic for the lifestyle you want.

Common mistakes

Assuming a high rate is safe. Rates well above 4% can work in strong markets but risk depleting a portfolio if returns disappoint early.
Ignoring the length of retirement. A rate that suits a twenty-year retirement may be too aggressive for one that lasts forty years.
Forgetting inflation. A fixed income loses purchasing power, so plan for the amount you draw to rise gradually.
Treating the rate as set-and-forget. Review your withdrawals regularly and adjust when markets or your needs change.

This article is general information only and is not financial advice.

About This Withdrawal Rate Calculator

Use this withdrawal rate calculator to get an instant estimate based on the figures you enter. Adjust the inputs above to match your situation, or browse all our calculators to plan your next step.

Frequently asked questions

How does the withdrawal rate calculator work?

Enter your portfolio value and the annual withdrawal rate you want to test. The calculator multiplies the two to find your annual withdrawal, then divides by twelve for the monthly figure, showing how much income a given rate would draw from your savings.

What is a safe withdrawal rate?

A safe withdrawal rate is the percentage of a portfolio you can withdraw each year with a high chance of the money lasting through retirement. The well-known 4% rule is a common starting point, but the right figure depends on your time horizon, your investment mix, and how flexible your spending is.

What is the 4% rule?

The 4% rule suggests withdrawing 4% of your portfolio in the first year of retirement and adjusting that amount for inflation each year afterwards. It comes from historical research on how long a balanced portfolio lasted. It is a guideline, not a guarantee, and works best when reviewed regularly.

Should I use a lower withdrawal rate?

A lower rate, such as 3% or 3.5%, gives more protection against poor early returns and a long retirement, at the cost of lower income. A higher rate raises income but increases the risk of running out. The calculator lets you compare rates so you can see the income trade-off directly.

Does the calculator account for inflation and market returns?

No. It shows the income a fixed rate produces from the value you enter. Real portfolios rise and fall, and inflation erodes spending power, so treat the result as a planning guide and revisit it as your balance and needs change.

Is my data kept private?

Yes. The calculation runs entirely in your browser. Nothing you enter is uploaded, stored, or shared with anyone.

About the author

Written and reviewed by

Taha Kheirandish

Economics student and independent researcher

Taha Kheirandish reads tax codes the way other people read maps — to find out where a system actually leads, not where it claims to go.

He is an economics student, and his work here is comparative by design. A pension deferral bonus in Quebec, a commuting allowance in Germany, a rent-increase ceiling in the Netherlands: each is a decision a government made about how money should move, and each reads differently once you set it beside eight others. He builds and checks these calculators across nine markets from primary sources — the regulation rather than a summary of it, the ministry’s own circular rather than a news item quoting it.

That is the editorial standard of the site as well as his habit. Every rate, threshold and bracket here carries the document it was read from and the date it takes effect, and gets re-checked when the law moves rather than when someone happens to notice.

He is a researcher, not a licensed adviser, and nothing on this site is personal financial advice. It is arithmetic done carefully with its sources shown — so that you can check it, and take it to someone who is.

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