Savings Goal Calculator — How Much to Save Each Month
Work backwards from any savings target — a house deposit, wedding, holiday, or emergency fund — to find exactly how much you need to save monthly.
How to Actually Hit a Savings Goal — Not Just Set One
"I want to save £10,000" is a wish. "I need to save £385 a month for 24 months" is a plan. The difference between the two is exactly what this calculator does — it turns a vague target into a concrete, trackable monthly number, accounting for the interest your savings earn along the way.
Use Find Monthly Amount mode when you have a goal and a deadline (a wedding date, a house move, a trip) and need to know what to save each month. Use Find Time Needed mode when you know what you can realistically afford monthly and want to know how long it'll take to reach the goal.
Common UK Savings Goals — Realistic Numbers
| Goal | Typical Target | Monthly (12 months, 4% rate) | Monthly (24 months, 4% rate) |
|---|---|---|---|
| Emergency Fund | £2,000 – £5,000 | £164 – £409 | £82 – £204 |
| House Deposit (5%) | £15,000 – £25,000 | £1,227 – £2,045 | £613 – £1,022 |
| Wedding | £10,000 – £20,000 | £818 – £1,636 | £409 – £818 |
| Holiday / Travel | £2,000 – £5,000 | £164 – £409 | £82 – £204 |
| Car (cash purchase) | £8,000 – £15,000 | £654 – £1,227 | £327 – £613 |
Why the Interest Rate Actually Matters Here
For short-term goals (under 2 years), interest makes a relatively small difference — you simply don't have enough time for compounding to do much heavy lifting. But it's not nothing, and there's no reason to leave it on the table. A high-yield easy-access savings account at 4-5% versus a current account paying 0.1% genuinely changes the numbers, especially for goals 2+ years out.
| Goal: £10,000 in 36 months | 0.1% Rate | 4.5% Rate | Difference |
|---|---|---|---|
| Required monthly saving | £277.55 | £260.45 | £17.10/mo less needed |
| Total interest earned | £42 | £684 | £642 more |
On a 3-year goal, switching from a near-zero-interest account to a competitive savings rate is worth over £600 in free money — for doing nothing differently except picking a better account. That's the easiest win in personal finance: it costs nothing and takes 10 minutes to switch.
Making the Monthly Number Actually Happen
Knowing the number is one thing. Hitting it every month is another. A few things that genuinely help:
- Automate it. Set up a standing order for the day after payday, moving the exact amount to a separate savings account. Money you don't see is money you don't spend.
- Use a dedicated account. Keeping goal savings separate from your everyday spending account removes the temptation to dip into it for non-essentials.
- Recalculate after irregular income. Got a bonus or tax refund? Add it as a lump sum, then rerun the calculator — your required monthly amount drops, giving you breathing room or letting you hit the goal earlier.
- Build in some slack. If the calculated monthly figure feels uncomfortably tight, either extend the timeline or reduce the target slightly. A savings plan you can't sustain isn't really a plan.
Frequently Asked Questions
How does this calculator account for interest on my savings?
It uses a future value of annuity calculation, which factors in monthly compounding on both your existing savings and each new monthly contribution as it's added. This means the required monthly amount is slightly lower than a simple division of (goal ÷ months) would suggest, since your savings also earn interest along the way — the higher the rate and the longer the timeframe, the bigger this effect.
Should I save or invest for a short-term goal?
For goals under 3-5 years, saving in a stable, easy-access account is generally recommended over investing. Investment markets can drop significantly in any given year or two, and you don't want to discover your house deposit is suddenly worth 20% less right when you need it. Investing is more commonly suggested for longer-term goals (5+ years) where there's more time to ride out market volatility.
What if I can't afford the monthly amount the calculator shows?
Two options: extend your timeline (switch to "Find Time Needed" mode to see how much longer it would take at an affordable monthly amount), or reduce the target amount itself. A savings plan that's realistic and sustainable, even if it takes longer, is far more likely to succeed than an ambitious one that gets abandoned after a few months of struggle.
Does adding a lump sum I already have change the calculation significantly?
Yes, often more than people expect. Existing savings get the full benefit of compounding for the entire remaining timeframe, while monthly contributions only compound for the months remaining after each one is made. Entering any amount you've already saved in the "Amount Already Saved" field gives a more accurate, usually lower, required monthly figure.
How much should an emergency fund be?
A common guideline is 3-6 months of essential expenses, though this varies by job stability and personal circumstances — those with irregular income or dependents often aim for the higher end or beyond. For many UK households, this translates to roughly £6,000-£15,000 depending on lifestyle and monthly outgoings. Start with a smaller initial target like £1,000 if a full emergency fund feels overwhelming, then build from there.