Pension Calculator

What this calculator tells you

A pension calculator estimates how much your retirement savings may be worth when you stop work, and what yearly income that pot could provide. It combines what you have already saved, what you and your employer will pay in, the growth you assume and the income you plan to draw.

The results are estimates, not forecasts. Pension rules, tax, state benefits and the way pensions are paid out differ widely between countries, so the figures show the shape of your savings plan rather than a promise of income.

How the pot and income are worked out

The calculator grows your current savings at the assumed return and adds regular contributions each year, in the same way as an investment projection. At retirement, the pot is divided by the number of years you expect to draw from it, adjusted for growth, to give a yearly income. A common simple approach is to take a sustainable percentage of the pot each year, such as 4%, which gives a yearly income equal to the pot multiplied by that percentage.

A worked example

Suppose your pension pot is 500,000 at retirement and you plan to draw 4% of it each year. The yearly income is 20,000 before tax. If the pot were 250,000, the same rule would give 10,000 a year. The percentage is a planning rule, and the sustainable level depends on how long the money must last and what returns you achieve.

Assumptions that drive the result

The three inputs with the largest effect are the return, the contribution rate and the age at which you retire. Small changes in the return compound over decades, and starting contributions earlier adds much more than increasing them later. Test a lower return than you expect, because a shortfall in returns is the most common reason pension plans fall short.

Limits of the calculation

State pensions, employer matching rules, tax relief and the tax on withdrawals are not modelled in detail, and each can change the net income considerably. Inflation reduces the buying power of a fixed income, so the income shown should be read in future money unless you have adjusted for it. The calculator also does not model the risk of living longer than your savings are planned to last.

Reviewing your pension each year

Pension statements show the current value, but the projection depends on the assumptions behind it. Each year, check the contributions paid in, the charges taken and the return achieved, and update your calculation accordingly. Small improvements in contributions or charges can add significantly to the final pot.

Using the result

Use the calculator to see whether your current contribution rate is likely to meet your income goal, and what increasing contributions by a small amount would change. Check your official pension statements for the actual figures, and take advice from the pension provider or a qualified adviser before making decisions that cannot easily be reversed.

Understanding the drawdown choice

Once the pot is built, the way it is drawn down matters as much as its size. A fixed yearly income gives certainty but may be less flexible if your needs change. Drawing a percentage of the pot each year adjusts with its value but makes income less predictable. Many people combine a secure base income with a flexible top-up, and the right balance depends on your other sources of income and your tolerance for uncertainty.

Check the tax treatment of withdrawals in your country before drawing from the pot, as the timing and size of withdrawals can change the amount of tax you pay.