Savings Goal Timeline Calculator
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Enter your savings goal, starting balance, monthly contribution and interest rate to see exactly when you will reach your target — with total interest earned.
| Goal | Amount | £200/mo @ 4.5% | £400/mo @ 4.5% |
|---|---|---|---|
| Emergency fund (3 months) | £5,000–£9,000 | 21–38 months | 11–20 months |
| New car deposit | £3,000–£5,000 | 13–22 months | 7–11 months |
| House deposit (5%) | £10,000–£25,000 | 48–107 months | 23–55 months |
| Wedding | £15,000–£30,000 | 68–128 months | 33–64 months |
| Round-the-world trip | £8,000–£15,000 | 37–68 months | 19–33 months |
The calculator uses the compound interest formula with monthly compounding:
Monthly compounding (as used by most UK savings accounts) is slightly more beneficial than annual compounding. On £10,000 at 4.5%: annual compounding gives £450 interest in year 1; monthly compounding gives £459 — a modest but real difference that compounds over time.
Saving £10,000 depends on your monthly contribution and interest rate. Saving £500/month into a 4.5% AER account takes approximately 19 months (just under 1.6 years), earning around £350 in interest. At £300/month it takes about 32 months (2.7 years). At £200/month it takes around 48 months (4 years). The fastest legal route is to use a Cash ISA or easy-access savings account paying the highest available AER, since there is no tax on interest inside an ISA. Searching comparison sites for top rates takes minutes and can save months.
The interest rate makes a significant difference over longer timeframes but a more modest difference in the short term. Saving £300/month for £20,000: at 2% AER it takes 61.5 months; at 4.5% AER it takes 58 months — a saving of 3.5 months. For £100,000 saved at £500/month: at 2% it takes 177 months (14.75 years) versus 156 months (13 years) at 4.5% — saving 21 months. The higher the goal and the longer the timeline, the more powerful even a 1-2% interest rate improvement becomes through compounding.
If you have a lump sum available, investing it immediately typically outperforms monthly saving because more money spends more time growing. Research consistently shows that lump sum investing beats monthly DCA about 66% of the time in rising markets. However, if your lump sum is your only emergency fund, keeping 3-6 months of expenses in cash is essential before investing the rest. Monthly saving (DCA) is the right strategy when you are accumulating from income, and it reduces the risk of investing everything at a market peak. For a savings goal with a fixed timeline — holiday, house deposit, car — a dedicated savings account with monthly contributions is usually best.
As of early 2026 with the Bank of England base rate at 4.5%, the best easy-access accounts pay 4.5-5.0% AER. Fixed-rate bonds for 1-2 years offer 4.7-5.2% AER. Cash ISAs (tax-free) pay 4.3-4.8% AER. For a savings goal with a specific date: match a fixed-rate bond maturity to your target date. For flexibility: top easy-access accounts with no penalty for withdrawal. Always check MoneySavingExpert or Moneyfacts for the current best rates, as they change frequently. Premium Bonds from NS&I offer a tax-free prize rate equivalent to about 4.4% on average, with FSCS-equivalent protection.
The most impactful tactics for saving faster: (1) Automate savings on payday — you cannot spend what you never see in your current account. (2) Open a dedicated savings account separate from your spending account. (3) Use round-up savings features on apps like Monzo, Starling, or Chase UK. (4) Do a monthly subscription audit — the average UK household spends £52/month on unused subscriptions. (5) Batch cook to reduce food costs by 30-40%. (6) Use cashback sites (TopCashback, Quidco) for online purchases. (7) Challenge yourself with no-spend days or weeks. (8) Increase your income through overtime, freelancing, or selling unused items.