Savings Withdrawal Calculator

The same result means different things depending on why you are here.

Bridging to a pension. You stop working now, and pension income starts in a few years. The savings only have to cover the gap, and the end date is known.

A break from work. A year or three away, then back. What matters most is the balance when you return.

Living from capital. Supporting long-term income from capital, alongside whatever else you have.

The first two have a date you can point to. The third has an uncertain length, and that is the difference that matters: a plan for a period you know can be tight, while a plan for a period you cannot know needs room in it. Because the end date is uncertain, it is worth testing more than one time horizon. This calculator cannot determine a permanently sustainable lifetime income.

You start with a fund. An amount comes out each month. What stays in may keep earning.

Two forces pull against each other. Withdrawals reduce the balance. Growth adds to what remains. Which one is larger decides whether the balance falls, holds, or rises.

A common term for scheduled withdrawals from savings or investments is a Systematic Withdrawal Plan, or SWP.

Two other things happen along the way, and both are easy to miss. Tax means more has to leave your savings than reaches you. Inflation means each future payment buys a little less than the last.

The headline sentence answers one question: does the money last for the period you chose?

A falling balance is not automatically a failed plan. If the money is meant to be spent, spending it is the point. What matters is whether it lasts as long as you need.

Lasting the period you chose is not the same as being safe. It means the plan holds up under the assumptions you entered. Change the return, the period or the amount, and the answer can change with it.

The order of returns matters, not only the average. Two plans can earn the same average return and still end differently. Losses early in a withdrawal period can do more damage, because money is being removed before the remaining balance has time to recover. This is called sequence-of-returns risk, and this calculator does not model it.

Running out early is information, not a verdict. It says the combination you entered does not hold. One input changed, and it may.

And a growing balance can still be losing ground. If it grows more slowly than prices rise, the number gets bigger while buying less. That is why the purchasing-power panel in your results shows the figures in today’s money.

On longer plans, the result adds a rough reference point. For plans of this length, the withdrawal rate is sometimes compared with a well-known reference point, the 4% rule: about 4% of your savings in the first year, then raised with prices. This is context, not a verdict: a suitable rate actually depends on the time horizon, the investment mix, inflation adjustments, fees, how flexible your spending can be, and the order of future returns, not one shared number.

Four things affect a plan like this and rarely come up, because most people do not know to ask about them.

Your monthly income shrinks in real terms, even when the number stays the same

Everyone understands that a future balance is worth less than it looks. Far fewer notice the same is true of the income.

If you take a fixed amount every month for many years, the last payment is the same number as the first and buys noticeably less. The purchasing-power panel in the results shows both: what your monthly income will buy by the end, and what it would need to be to hold its value.

This is worth looking at before anything else, because it changes what “enough” means.

This calculator does not include fees

Management fees, platform fees and fund charges are not part of the calculation. If you pay a percentage each year, your real outcome will be lower than the projection.

A rough way to allow for it: subtract your annual fee from the growth figure you enter. If you expect 6% and pay 1%, try 5% and see how much the answer moves.

This calculator uses a simplified tax model

It applies one tax rate to the estimated gain portion of each withdrawal. That covers the basic shape of how a plain taxable investment account is often taxed, but your actual tax may be calculated differently depending on the account, the investment, your cost basis, and the tax rules that apply to you.

The broad question is the one worth carrying: could tax mean more has to leave my savings than reaches me? Here, yes. How much depends on rules this calculator does not know.

The calculator does not add up your other income sources for you

It does not assume these savings are your only income. If a pension, part-time income, or another payment will cover part of your monthly needs, enter only the amount you need to draw from these savings; the calculator will not estimate or add those other sources automatically.

A flat monthly amount assumes your needs stay flat

The calculation takes the same amount every month for the whole period. Real spending is not like that. A year with a medical cost, a move, or help for family is a different year.

If you expect that, it is worth running the plan on a slightly higher monthly figure than you need, so there is room in it.

The most useful thing you can do here is run it more than once.

Try a lower monthly amount. How much does the plan improve? Even a modest reduction may extend it.

Try a lower return. If the conclusion changes when you reduce the assumed return, the plan is sensitive to that assumption. If it still works, it has more room under this model, though that does not remove the other risks the calculator cannot model.

Try a longer period. People often plan for fewer years than they end up needing.

Open the purchasing-power panel. Both figures in it tend to change how the result reads.

Want to see what rising prices alone do to a fixed amount over the years? The Inflation Calculator shows it. Still building your savings? The Compound Interest Calculator shows how they could grow first.

What this calculator cannot know

Future returns. Future inflation. Future tax rules. Your fees. Whether your needs stay steady. How long the money actually has to last.

It does not know what your life costs. It works out what your savings can support, either by testing a monthly amount you choose or by estimating one for a period and ending balance you set. Whether that amount is enough to live on is a different question, and it depends on your rent, your health, your family and the place you live.

It does not know about other money arriving later. A pension that starts in a few years, a property sale, part-time work. As above, enter only what you need from these savings if another source will cover the rest.

It is a way to test assumptions, not a way to predict what happens. If the decision is long-term or financially significant, consider discussing it with a qualified professional who can review your full situation.