Savings Goal Calculator
Work out how much you need to save regularly to reach a savings target, or how long it will take at a contribution you can afford.
Savings Trajectory
Savings Progress
Savings Goal Calculator UK
Our Savings Goal Calculator is a goal-seeking tool: instead of projecting how a fixed contribution will grow, it works backwards from a target amount to tell you either how much you need to save each period, or how long it will take to get there. This makes it different from our Savings Calculator, which answers “how much will my savings grow to?” – this tool answers “what do I need to do to hit my target?”
How Much Do I Need to Save to Reach a Target?
If you already know when you want to reach your goal – a specific date, or a timeframe like “2 years” – the calculator works out the regular contribution required to get there, taking into account your current savings and any interest your money earns along the way. The more you already have saved, and the higher your interest rate, the less you need to contribute yourself.
How Long Does It Take to Reach a Savings Goal?
If instead you know what you can realistically afford to put aside each month or week, the calculator works out how long it will take to reach your goal at that rate, and gives you an estimated achievement date. If your chosen contribution and interest rate would never get you there within a 50-year window, the calculator tells you clearly rather than showing a misleading result.
How Compound Interest Affects Your Goal
Interest is calculated on your growing balance each period, using the effective rate derived from your annual interest rate (AER) rather than simply dividing the annual rate by 12 or 52. This effective-rate approach means the calculator captures the effect of interest compounding within the year, so the figures line up with how savings accounts and cash ISAs actually calculate interest.
Monthly vs Weekly Saving
Saving weekly rather than monthly doesn’t change how much you need to save in total, but it can make budgeting easier if you’re paid weekly, and smaller, more frequent contributions mean your money starts earning interest slightly sooner on average. The calculator applies an effective weekly rate derived consistently from your annual interest rate, so monthly and weekly results stay comparable rather than one simply being the other divided by a fixed number of periods.
How to Set a Realistic Savings Target
- Be specific about the amount. “A house deposit” is vague; “£15,000 for a 5% deposit” is a target you can plan against.
- Check the required contribution is affordable. If “How much do I need to save?” returns a figure well above what you can set aside, either extend your timeframe or reduce your target.
- Build in a buffer. Interest rates and personal circumstances change, so treat the result as a starting point rather than a fixed promise.
- Review periodically. Re-run the calculator every few months with your actual savings balance to stay on track.
Why Your Actual Savings Rate May Differ
This calculator assumes a constant interest rate and constant, uninterrupted contributions for the whole period. In reality, savings and cash ISA interest rates can rise or fall, and life events can mean contributions are missed or increased. The results are illustrative estimates to help with planning, not a guarantee of the amount you’ll end up with or how long it will actually take.
Frequently Asked Questions
How much do I need to save each month to reach £10,000?
It depends on your current savings, your timeframe and your interest rate. For example, starting from £1,000 with a 2-year timeframe at 4% AER, you’d need to save around £358 a month. Enter your own figures into the “How much do I need to save?” mode to get a precise answer for your situation.
How long does it take to save £10,000?
This depends entirely on how much you can contribute each period and your interest rate. Use the “How long will it take?” mode, enter your goal, current savings and what you can afford to save, and the calculator will estimate the time and give you an approximate achievement date.
Does interest reduce the amount I need to save?
Yes. The higher your interest rate, the more of your goal is met by growth on your balance rather than by your own contributions, so the required regular contribution in “How much do I need to save?” mode is lower than it would be with no interest at all.
Is monthly or weekly saving better?
Neither is inherently better – it’s mainly a question of which fits your pay schedule and budgeting habits. Weekly contributions are added to your balance slightly more often, so on average they start earning interest a little sooner than an equivalent monthly contribution, but the difference is normally small.
What if I already have some money saved?
Enter it as your “Current Savings” figure. The calculator factors this in from the start, so both the required contribution and the time-to-goal estimates account for the growth your existing savings will generate alongside any new contributions.
What happens if my savings interest rate changes?
The calculator assumes a constant rate for the whole period, so if your actual rate rises or falls, your real results will differ from the estimate. It’s worth re-running the calculator with an updated rate and your current balance periodically to keep your plan realistic.
Can I use this for a house deposit?
Yes. Enter your deposit target as the savings goal, your current savings, and either a target moving-date or how much you can save each month, and the calculator will show what’s required or how long it will take. For Lifetime ISA-eligible deposits, you may also want to check the Lifetime ISA Calculator, which factors in the government bonus.
Can I use this for an emergency fund?
Yes, it works for any savings goal with a fixed target amount, whether that’s an emergency fund, a wedding, a car, or any other purpose. Just enter your target amount and choose whichever mode matches the question you want answered.