The Squirrel Savings Calculator

Little and often beats big and rarely. Squirrel away a slice of your pay — even 5% — and compound interest does the heavy lifting. See what your stash could grow into. 🐿️

Your squirreling plan

1%25%

0%8%

Easy-access accounts currently pay around 4–5% AER; regular savers and fixes can pay more.

1 yr40 yrs

Your squirrel stash 🐿️

After 10 years
£0
Your stashWhat you put in
Put inInterestStash

Assumes interest compounds monthly at a steady rate, with contributions made at the end of each month — real rates change over time. Interest outside an ISA can be taxable above your Personal Savings Allowance. This is an illustration, not financial advice.

Why squirreling works

Squirrels don’t bury one giant nut — they stash small ones constantly, and that’s exactly how saving works best. Three things do most of the work:

  • Paying yourself first. Move the money the day you’re paid, before it gets spent. A standing order into a separate account on payday is the single most effective savings habit there is — and a 5% slice is small enough that most people simply stop noticing it.
  • Compound interest. Your interest earns interest. It looks unimpressive for the first couple of years, then the curve bends upwards — on a 20-year stash, the interest often ends up rivalling what you paid in. Use the chart above and watch the gap between the two lines widen.
  • Percentages, not amounts. Saving a slice of your salary means your saving automatically rises with every pay rise, without a single extra decision. It also scales with reality — 5% is 5% whatever you earn. Check what 5% of your pay is after tax with our salary calculator.

Where to keep the stash: an easy-access account for your emergency fund, then consider regular savers and fixed-rate accounts for better rates, or a cash ISA if interest might push you past your Personal Savings Allowance (£1,000 of tax-free interest for basic-rate taxpayers, £500 for higher-rate). And if you’re carrying expensive debt, clearing that first usually beats any savings rate.

How this compares to other UK savings calculators

Savings calculator FAQs

How long will it take me to save £10,000?

That depends on what you put away and what rate you earn. Starting from nothing at £125 a month with a 4% AER account, you'd reach £10,000 in almost exactly six years — you'd have paid in £9,000 and interest would have added the other £1,131. Push the monthly amount to £155 and you get there a year sooner. Set the calculator above to “How long until I hit my goal?” and put your own numbers in.

How much do I need to save each month to reach my goal?

Set the calculator to “How much must I save each month?”, enter your target and your deadline, and it works backwards for you. To reach £10,000 in ten years at 4% AER, for instance, you'd need about £68 a month — you'd pay in £8,180 and interest would cover the remaining £1,820. Shorten the deadline and the monthly figure climbs steeply, which is the clearest argument there is for starting early.

Is 5% of my salary enough?

It's a brilliant start — the habit matters more than the amount. A common rule of thumb is to work towards 20% of take-home pay across all saving (including pensions), but 5% squirreled consistently beats 20% attempted and abandoned. Start where you are, then nudge the slider up with each pay rise.

What interest rate should I assume?

UK easy-access accounts currently pay roughly 4–5% AER, with regular savers and fixed-rate bonds sometimes higher. Rates move with the Bank of England base rate, so treat any long-term projection as a rough guide — try a pessimistic and an optimistic rate to see the range.

Will I pay tax on the interest?

Basic-rate taxpayers can earn £1,000 of interest a year tax-free under the Personal Savings Allowance (£500 for higher-rate). Beyond that, interest is taxable — which is where cash ISAs earn their keep, since ISA interest is always tax-free.

Should I save or pay off debt first?

A small emergency buffer first (£500–£1,000), then attack expensive debt — a credit card charging 25% costs you far more than any savings account pays. Once the expensive debt is gone, redirect the same monthly amount into savings; you won't miss money you were already spending.

Does this calculator store my numbers?

No — everything runs on this page in your browser. Nothing is saved, sent or shared.

Feed the squirrel without feeling it

Cut £30 a month from your bills and squirrel the difference — you’ll never notice it leaving, but you’ll definitely notice the stash.