Regular Savings Calculator

Our regular savings calculator shows how consistent monthly contributions grow over time with compound interest — demonstrating why regular saving, even at modest amounts, produces impressive results over 10, 20, or 30 years. Enter your monthly contribution, interest rate, and time horizon to see your projected final balance and total interest earned.

Why Regular Saving Beats Lump Sums for Most People

Most people do not have large lump sums to invest — but almost everyone can find £100 to £500 per month to set aside. The mathematics of regular saving are highly favourable. £300 per month at 4.5% over 20 years produces a balance of approximately £113,000 — of which £41,000 is interest on total contributions of £72,000. The same £300 per month for 30 years grows to £257,000 — more than doubling from the 20-year figure with only 50% more contributions.

Regular savings also benefit from pound-cost averaging when invested in funds or equities — buying more units when prices fall and fewer when they rise, smoothing the entry price over time. For cash savings, the benefit is simply the compound accumulation of monthly interest on a growing balance.

Regular Savings Account Rates

Specialist regular savings accounts from banks and building societies often offer higher rates than standard easy-access accounts — sometimes 5–8% AER for 12-month fixed periods — to reward monthly saving discipline. These accounts typically require a minimum monthly deposit and prohibit or penalise withdrawals. After the fixed period, the balance is usually transferred to a lower-rate account. Our calculator lets you model any rate, including these promotional rates, for accurate projections.

Frequently Asked Questions

How to Use the Regular Savings Calculator

Regular savings accounts reward consistent monthly deposits with rates that are often significantly higher than easy-access accounts. Enter the monthly amount you plan to save and the annual interest rate offered by the account. Most regular savings accounts have a maximum monthly deposit — typically £200 to £500 for high-street bank accounts, and up to £3,000 for some specialist accounts. Ensure your planned contribution does not exceed the account’s monthly cap.

The calculator compounds interest on your growing balance each month. Because contributions are added gradually rather than as a lump sum, the effective return is roughly half what it would be if the full annual contribution were invested from day one. A 6% regular savings account on £200 per month does not deliver 6% on £2,400 — it delivers approximately 6% on an average balance that grows from £200 to £2,400 across the year.

After the regular savings account term ends (typically 12 months), the balance usually transfers to a lower-rate easy-access account. Plan for this transition and move the balance to the best available account at maturity. Many savers roll the lump sum into the following year’s regular savings account if the rate remains competitive, supplementing with new monthly contributions.

Regular savings accounts are particularly useful for building a deposit, an emergency fund, or saving for a specific goal with a known timeline. The discipline of committing to a monthly payment — often by standing order — makes them effective for people who find it difficult to save consistently from a current account. The higher interest rate compared to easy-access accounts rewards the commitment to regular saving behaviour.