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Pension Pot Calculator

Project what your pension pot could be worth at retirement from your current pot, your and your employer's monthly contributions, expected growth and charges — then see an indicative income at a withdrawal rate you choose.

The amount that actually reaches your pot each month — include any tax relief your provider adds, since this calculator doesn't add relief itself.
One average rate for the whole period. Real investment returns vary year to year and aren't guaranteed.
Platform and fund charges, taken off the growth rate above each year (so 5% growth minus 0.75% charge nets 4.25%).
Used only for the indicative income figure below — it doesn't change the projected pot. 4% is a common illustrative starting point, not a guaranteed safe rate; edit it to see other scenarios.
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Total paid in (you + employer)—
Growth added (net of charges)—
Projected pot at retirement—
Indicative annual income—
Indicative monthly income—

This is a generic, illustrative projection — not financial advice, a personal recommendation, or a promise of any outcome. It does not recommend switching, transferring or consolidating any pension, and it doesn't name or favour any product or provider. It ignores inflation, tax on withdrawals, investment ups and downs along the way, and pension-specific rules such as tax-free cash, annuities or drawdown charges. For guidance on your own pension choices, use the free, government-backed Pension Wise service (for over-55s) or MoneyHelper; for a personal recommendation, speak to a regulated financial adviser.

How the projection works

The pot grows in two ways each month: it compounds at a net annual growth rate — your expected growth minus your annual charge — converted to an equivalent monthly rate, and your and your employer's combined monthly contribution is added and left to grow for however many months remain. In formula terms, with P = current pot, M = combined monthly contribution, i = the monthly rate equivalent to (growth − charge) compounded annually, and n = years × 12 months:

Projected pot = P × (1 + i)n + M × [((1 + i)n − 1) ÷ i]

The indicative income simply multiplies the projected pot by the withdrawal rate you choose: annual income = pot × withdrawal rate. A higher withdrawal rate draws the pot down faster and leaves less margin for a run of poor investment years or a longer-than-expected retirement — this calculator doesn't model either, so treat the income figure as a rough starting point for a conversation, not a plan.

FAQ

Should I enter my contribution before or after tax relief?
Enter the amount that actually lands in your pot each month. For a workplace pension under "relief at source", your provider typically adds basic-rate tax relief on top of what leaves your pay — so if £160 leaves your payslip and relief takes it to £200 in the pot, enter £200. If you're not sure which method your scheme uses or how much relief you get, check your latest pension statement or ask your provider — this calculator doesn't calculate relief for you.
Why is the charge subtracted from the growth rate?
It's a simplification used to keep the calculator to inputs you can find on a statement: a 5% expected growth rate with a 0.75% annual charge nets to roughly 4.25% a year, compounded monthly. Real pension charges can be structured differently (a flat fee, a percentage of the whole pot regardless of growth, or several layers for platform plus fund), so treat the net rate as an approximation, not an exact match to your provider's charging structure.
Is this financial advice, or does it suggest I switch or consolidate my pensions?
No. This is a generic arithmetic projection with no knowledge of your actual pensions, health, other savings or goals, and it never names or favours a specific pension, product or provider. Regulated financial advice means a personal recommendation to take (or not take) a specific action with your money; this tool only shows what a set of numbers you typed in would grow to. If you're weighing up combining pensions, changing how you invest, or when to retire, the free and impartial Pension Wise and MoneyHelper services (backed by the UK government) or a regulated financial adviser are the places for guidance or advice tailored to you.

Sources & legal basis

Figures used: the full new State Pension is £241.30 a week for the 2026/27 tax year (about £12,548 a year, our calculation from the weekly figure), reached with 35 qualifying years of National Insurance contributions if your record started after April 2016 — more if you were contracted out, and at least 10 qualifying years to get any new State Pension at all. That figure is shown above for context only; it is not added to the projected pot or income figures, since your own entitlement depends on your National Insurance record. Everything else on this page — the pot growth, contributions and indicative income — is plain arithmetic (a standard future-value-of-annuity calculation), not a quoted rate or product feature from any provider.