Whether you're saving for a holiday, a car, a house deposit, a wedding, or just a buffer to fall back on — this calculator works out exactly when you'll get there based on what you can put aside each month.
Enter your target, your starting balance (if any), your monthly saving amount, and the interest rate you're earning. The calculator gives you a clear date and a month-by-month breakdown of how your pot grows.
Why a Target Date Helps
Saving without a specific target can feel directionless — the money builds slowly, you're not sure if you're on track, and it's easy to dip into it because the endpoint isn't clear.
A specific goal changes the psychology. When you can see "at £200 a month, I'll have £3,000 by September," the saving becomes purposeful. The monthly transfer stops feeling like a sacrifice and starts feeling like a step towards something specific.
It also gives you something to adjust. If September is too late, the calculator shows you what £250 a month would do instead. If £200 a month isn't realistic right now, you can see what the revised timeline looks like at £150. These are decisions you can make with accurate information rather than guessing.
The Interest Effect at Different Timescales
For short-term goals — saving for a holiday in six months, or a car in a year — the interest earned is small. At £200 a month into an account paying 4.5%, you'd earn around £27 in six months. Useful, but not transformative.
For longer-term goals, the compounding effect becomes more meaningful. Saving £200 a month for five years at 4.5% produces approximately £13,300 — roughly £800 more than you'd have from deposits alone. Over ten years, the difference between saving with and without interest becomes genuinely significant.
The calculator shows the interest component separately so you can see exactly what the account is contributing on top of your deposits.
Compound interest works best over time. Even modest interest rates produce meaningful extra returns when you're saving consistently for several years.
Choosing the Right Account for Your Goal
Where you keep your savings while you're building towards a goal matters, particularly for longer timescales.
Under one year: Easy-access savings account is usually right — you might need access, and flexibility matters more than rate at short timescales.
One to three years: Cash ISA or fixed-rate savings account. If you're confident about the timeline and don't need access, a fixed rate is typically higher. If the timeline is uncertain, easy-access is safer.
Three years or more: Worth considering whether a Stocks and Shares ISA could give better returns, accepting some risk. For a defined goal like a house deposit where you need a specific amount at a specific time, cash is usually safer. For wealth-building without a fixed endpoint, investment options become more relevant.
Our ISA guide covers the different account types in more detail.
When the Goal Feels Too Far Away
If the calculator shows your goal is further away than you'd hoped, there are a few levers:
Increase the monthly amount. Even small increases compound over time. Toggle to Mode B to see exactly how much the date shifts with different monthly amounts.
Increase the interest rate. Moving to a higher-rate account speeds up the timeline without changing your deposits. Compare current rates before assuming your existing account is competitive.
Reduce the goal. Sometimes the goal itself can be adjusted — a slightly smaller holiday, a used car instead of new, a smaller emergency fund initially. Reaching a reduced goal on time is often more motivating than missing a larger goal.
Split the goal. A large goal can feel overwhelming. Breaking it into stages — first £500, then £1,000, then £2,000 — keeps momentum going and gives a sense of progress that a single distant target doesn't.
Pairing With Other Tools
This calculator works well alongside other MoneyLander tools. Use the safe to spend calculator first to establish what you can realistically set aside each month, then feed that figure into this calculator to see your timeline. If you're building an emergency fund specifically, the emergency fund calculator has guidance tailored to that purpose.
For a broader overview of how to structure your saving, the three account system provides a framework that automates the process of directing money towards goals.
Frequently Asked Questions
Yes — the calculator uses monthly compound interest, which is how most savings accounts work in practice. Interest is applied to the balance each month, so subsequent interest is calculated on a slightly higher amount.
The calculator assumes a fixed monthly deposit. If your saving amount varies, use your realistic typical amount rather than an optimistic one — it's better to reach your goal earlier than expected than to fall behind a target you set too high.
This calculator is designed for cash savings with a predictable interest rate. For investments — where returns are not fixed and can go negative — a different approach to projection is needed. This calculator is best suited to defined cash savings goals.
The projected date assumes the interest rate stays the same throughout. In practice, savings rates change. The date is a useful planning tool, not a guarantee. Checking your actual progress every few months against the projection keeps things on track.
For goals under one year, an easy-access savings account is usually right. For one to three years, a Cash ISA or fixed-rate account may offer better returns. For longer timescales, it's worth considering whether a Stocks and Shares ISA could give better returns. Our ISA guide covers the options in detail.
Projections are for guidance only. Interest rates can change. This is not financial advice. For free, impartial guidance visit MoneyHelper or Citizens Advice.