Fixed Deposit Calculator — UK
Calculate your fixed-deposit maturity value and interest in GBP at current rates. No signup, no tracking.
Fixed deposit rates in UK (2026)
Fixed-rate bonds ≈ 4–4.5% p.a. for 1–3 year terms. Best rates on MoneySavingExpert or Raisin UK.
Reference figures, ~2026. FD interest is often taxable and rates vary by bank and tenure - verify the current rate before depositing.
Worked example
For every £100,000 deposited at 4.00% for 5 years (quarterly compounding):
- Maturity value: £122,019
- Interest earned: £22,019
Scale to your deposit amount. Longer tenures and higher rates grow the maturity value; compare banks before locking in.
How to get the best fixed-deposit return in UK
- Compare several banks - smaller and digital banks often pay more than the big high-street names.
- Ladder your deposits across different tenures so some matures regularly and you can reinvest at new rates.
- Check how often interest compounds; more frequent compounding grows the maturity value.
- Factor in tax on the interest, and compare against short-term government bills or bonds.
Frequently Asked Questions
How is FD maturity calculated in UK?
Maturity = P × (1 + r/4)^(4n) for quarterly compounding, where P is the deposit, r the annual rate and n the years. fin·calc uses this standard method.
What is the current FD rate in UK?
As a 2026 reference, fixed-deposit rates are around 4% per year, varying by bank and tenure. Fixed-rate bonds ≈ 4–4.5% p.a. for 1–3 year terms. Best rates on MoneySavingExpert or Raisin UK.
Is FD interest taxable in UK?
In most countries FD interest is taxable as income; some offer tax-advantaged or senior-citizen options. Check your local rules - the calculator shows the pre-tax maturity value.
Is a fixed deposit safe in UK?
Fixed deposits carry no market risk and are often protected by a deposit-insurance scheme up to a limit. They trade higher safety for lower long-term returns than equities.
Should I choose a fixed deposit or invest instead in UK?
A fixed deposit gives a guaranteed return and suits money you cannot afford to risk. Investing targets higher long-term growth but can fall in value. Many people keep an FD for safety and invest separately for growth.