Free UK tool · Savings calculator UK
Whether you're saving for a house deposit, an emergency fund, a holiday, or anything in between — see exactly how long it'll take. Free, private, no sign up. Nothing you enter ever leaves your device.
Your data never leaves your device. Ever.How to use
The savings goal calculator UK above runs the maths the moment you start typing. Here's how to get a useful number out of it.
Below the headline you'll see total contributions, total interest earned, and a year-by-year breakdown of how the balance grows.
Understanding your savings
A savings calculator is only useful if you understand the levers it exposes. Here's the plain-English version.
Interest earned on top of interest already credited. £10,000 at 5% with monthly compounding becomes ~£16,470 after 10 years — about £1,470 more than a simple-interest calculation would give. The longer you leave it, the wider the gap. This is why a compound interest calculator UK matters: simple maths consistently underestimates long-term outcomes.
Two savers, both putting away £200 a month at 6%. Saver A starts at 25 and stops at 35 (10 years × £200 = £24,000 contributed). Saver B starts at 35 and saves until 65 (30 years × £200 = £72,000 contributed). At 65, Saver A has roughly £180,000; Saver B has roughly £200,000. Saver A contributed a third of what Saver B did and ended up almost level. Time in the market beats timing the market — by a lot.
Saving £500/month for 10 years at 3% gives ~£70,000. The same £500/month at 6% gives ~£82,000 — £12,000 more for the same effort. Doubling the time horizon roughly quadruples the gap. This is why parking long-term savings in higher-yield vehicles (Cash ISA best-buys, or stocks-and-shares ISAs for 5+ year horizons) is so powerful — small rate differences compound into big lifestyle differences.
The calculator separates how much money came from your pocket from how much was generated by interest. Early on, contributions dominate. Past 10–15 years, interest takes over. The crossover point — where your interest earned exceeds your total contributions — is one of the strongest emotional motivators in personal finance. The calculator's year-by-year table makes it visible.
"Nominal" is the raw number. "Real" is the same number after inflation. If your savings earn 5% nominal but inflation is 3%, your real return is ~1.94%. The inflation toggle in the calculator above shows your final amount adjusted to today's purchasing power — what the money will actually buy when you spend it.
UK specifics
UK savings rates broadly track the Bank of England base rate. Best-buy easy-access accounts and Cash ISAs typically sit around the base rate (sometimes 0.5–1 percentage point above). Fixed-rate bonds offer slightly more in exchange for locking the money up for 1–5 years. Compare current rates on Moneyfacts or MoneySavingExpert before plugging a figure into the calculator.
The annual ISA allowance is £20,000 across all ISA types — Cash, Stocks & Shares, Lifetime (limited to £4,000), and Innovative Finance. Interest earned inside an ISA is fully tax-free, regardless of your income. Outside ISAs, the Personal Savings Allowance gives basic-rate taxpayers £1,000 of tax-free interest a year (£500 for higher-rate, £0 for additional-rate). Most UK savers should fill their ISA allowance first, then use a normal savings account once it's exhausted.
Premium Bonds (NS&I) pay no interest — instead they enter you into a monthly prize draw with tax-free prizes. The "prize fund rate" is published as an indicative average return, but actual returns are random. Useful as a tax-free alternative once you've filled your ISA, or as a place for emergency savings if you don't mind the variability. Won't make sense for goal-oriented saving with a deadline because the upside is probabilistic.
UK inflation has averaged around 2–3% over the long run, with periods well above. £10,000 today buys what £8,200 buys in 10 years at 2% inflation — a 18% loss in purchasing power even if the money sits untouched. Cash savings paying less than the inflation rate are losing real value every year. Toggle the inflation option in the calculator to see your goal in today's purchasing power.
If you're under 40 and saving for a first home (or for retirement after 60), a Lifetime ISA gives a 25% government bonus on contributions up to £4,000/year — up to £1,000/year free. Use it for property up to £450,000. Withdraw before 60 for any other reason and you lose the bonus plus a small penalty, so it's a long-horizon vehicle. Powerful if your goal fits the rules.
FAQ
The questions people most often type into Google about UK savings goals.
It depends on the deposit you need and how much you can save each month. For a 10% deposit on a £300,000 home (£30,000), saving £500 a month with 4% interest in a Cash ISA takes roughly 4 years 7 months. £750 a month brings that down to about 3 years 1 month.
The calculator above shows your exact timeline for any combination of target, current savings, and monthly contribution.
It solves for the number of months it'll take to compound your current savings plus your monthly contributions up to your target. The formula is months = log((target × r + monthly) / (current × r + monthly)) / log(1 + r), where r is your monthly interest rate.
With no interest, it's simpler: (target − current) / monthly. The calculator also factors in inflation if you toggle it on.
A common UK rule of thumb is an emergency fund of 3–6 months of essential spending. If your essential outgoings are £2,000 a month, that's £6,000–£12,000.
Beyond the emergency fund, save toward specific goals — house deposit, holiday, retirement top-up — using their own savings accounts or ISAs. The calculator above lets you model any specific target so you know exactly what's required each month.
Use the calculator with your target set to 3–6× your monthly essential spending (rent/mortgage, utilities, food, transport, minimum debt payments). Pick a monthly contribution that's realistic — usually 5–15% of take-home — and an interest rate based on a current best-buy easy-access account.
Don't lock emergency fund money in a fixed-term bond. The point is fast access; the cost is a slightly lower rate.
Depends entirely on your goal and timeline. The 50/30/20 rule suggests 20% of post-tax income goes to savings or debt repayment, including pension contributions — so on a £2,500/month take-home, that's £500.
For specific short-term goals (1–3 years), back-solve from the target using the calculator above. For long-term goals, 15–25% is a healthy range for most UK households.
This calculator is a compound interest calculator. Enter your starting amount, monthly contribution, annual rate, and how much you're aiming for. The maths compounds monthly using the standard amortisation-of-savings formula.
The year-by-year projection table shows how interest grows relative to contributions over time — useful for visualising the "compound interest crossover" where interest earned starts to outpace what you put in.
Inflation reduces the real purchasing power of your savings over time. If your savings grow at 4% but inflation runs at 3%, your real return is only ~1%.
Toggle the inflation option in the calculator above to see your final amount in today's pounds — the figure that actually tells you what your savings will buy when you reach your goal.
Yes, completely free. There's no sign up, no email collection, and no paywall. Everything runs in your browser — none of the figures you enter are sent to a server or stored anywhere outside your device.
The full picture
Vault is the home for everything this calculator hints at — your savings, accounts, net worth, and progress toward every goal you set, all in one private view. Same principles: free, private, local only. Nothing you enter ever leaves your device.
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