Work forwards or work backwards.

Monthly mode estimates the number of months needed to reach your target. Target-date mode works backwards to estimate the monthly contribution needed to reach your target by the date you select.

Interest is optional. Set it to 0% when you want a simple cash-saving timeline.

HOW THE SAVINGS MODEL WORKS

Separate what you put in from what the account earns.

The calculator keeps contributions and modelled growth separate so the result can be understood. This matters because a target reached through £300 monthly contributions is a different plan from one that depends heavily on an assumed return.

0% baseline

Start at 0% when you want the simplest possible timeline. It shows how much of the target must come directly from your own contributions.

Positive-rate scenario

Add an interest assumption only when it is useful for comparison. Rates on savings products can change, so treat growth as an assumption rather than guaranteed cash.

Target-date planning

Working backwards from a date helps reveal whether the required contribution fits the rest of the household budget.

Worked example

With £2,000 already saved, a £10,000 target and £300 added each month, £8,000 remains to be built from contributions and any growth. At 0% growth that takes 26 full contributions plus a smaller final amount, which is why the calculator reports the exact timeline rather than rounding the answer to a simple division.

MoneyHelper's guidance recommends setting a clear savings goal and matching the monthly amount to what you can afford. Its interest-rate guide also explains why savings returns are separate from the amount you deposit. Savings goals → · Interest rates explained →

REVIEWED SEPTEMBER 2026

A realistic savings result includes the trade-off.

If the required monthly contribution is uncomfortable, the useful response is not to force the number. Change the target date, the contribution or the growth assumption and compare the scenarios. That turns the calculator into a planning tool rather than a single-answer generator.

Also keep near-term goals separate from long-term investment decisions. The model can show the maths under an assumed rate, but it does not recommend a particular savings account or investment product.

A useful target has a date, a contribution and a reason.

Starting with a number such as £10,000 is only part of a savings plan. The more useful questions are how much you already have, how much you can consistently add, when you need the money and what assumptions you are making about interest.

Monthly contribution

Choose an amount that can survive an ordinary month, not just a month with no unexpected costs. A lower sustainable contribution can be more useful than an ambitious figure you repeatedly stop.

Target date

A date turns a distant goal into a required pace. If the required monthly contribution is too high, changing the date shows the trade-off directly.

Interest assumption

Interest can help a savings goal, but rates can change and not every account pays the same return. Use a modest assumption when planning and compare it with a 0% scenario.

Example: starting with £2,000 toward a £10,000 target leaves £8,000 to build. A plan of £300 a month would rely on a steady contribution for roughly 27 months before allowing for the effect of interest. The calculator lets you test the exact timeline and then compare it with a larger or smaller monthly contribution.

Use the calculator to test the plan, not just confirm it.

A strong savings plan can survive a small change in circumstances. Try the result again with a lower monthly contribution, a later target date or a 0% growth assumption. If the plan only works under optimistic assumptions, that is useful information in itself.

Separate goals when the timing is different

Money needed soon is different from money for a long-term objective. A short-term house, car or emergency-fund target should not be treated like a long-term investment projection. This calculator can compare numerical scenarios, but it cannot decide whether a particular savings or investment product is appropriate for you.

MoneyHelper provides general guidance on how interest and compound growth work. Read the MoneyHelper interest-rate guide →

Savings calculator FAQs

What if my savings rate changes?

Run a second scenario at a lower rate or at 0%. The purpose of the calculator is to show how the outcome changes under different assumptions.

Should I count interest when setting a savings target?

You can, but treat it as an assumption rather than money you are guaranteed to receive. For a cautious target, compare the interest scenario with the 0% case.

What happens if I miss a monthly contribution?

The displayed plan assumes the contribution continues as entered. A missed contribution can delay the target, so leave some room in the plan if your income varies.

Can the calculator tell me which savings account to use?

No. It compares numerical assumptions only. Product choice can depend on access, account rules, tax treatment, rate changes and your own circumstances.