Fixed Rate Bond Calculator UK 2025
Use our fixed rate bond calculator to see exactly how much interest you will earn on your savings. Enter your deposit amount, the annual interest rate, and your chosen term to get a complete breakdown including total interest, effective annual rate, and a year-by-year schedule.
Fixed Rate Bond Calculator
Your Fixed Rate Bond Returns
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What Is a Fixed Rate Bond?
A fixed rate bond (also called a fixed term savings account or fixed term deposit) is a type of savings account where you agree to leave your money untouched for a set period in exchange for a guaranteed interest rate. Unlike variable rate savings accounts, the rate on a fixed rate bond cannot change during the term - you always know exactly what you will earn.
Fixed rate bonds are offered by banks, building societies, and challenger banks. They are not the same as government bonds (gilts) or corporate bonds traded on financial markets. The key feature is simplicity: deposit your money, wait for the term to end, and collect your principal plus interest.
Best Fixed Rate Bond Rates UK 2025
Interest rates have settled at elevated levels following the Bank of England rate rises of 2022-2024. Here are the typical best-buy fixed rate bond rates available in 2025:
| Term | Typical Rate Range | Best Buy Rate | Notes |
|---|---|---|---|
| 1 Year | 4.2% - 5.0% | ~5.00% | Most competitive term currently |
| 2 Years | 4.1% - 4.8% | ~4.80% | Good value |
| 3 Years | 4.0% - 4.6% | ~4.60% | Solid medium-term option |
| 4 Years | 3.9% - 4.5% | ~4.50% | Less common |
| 5 Years | 3.8% - 4.5% | ~4.45% | Long-term security |
Rates correct as of February 2026. Always check the latest rates directly with providers or comparison sites such as MoneySavingExpert and Which?
How Fixed Rate Bonds Work
The mechanics of a fixed rate bond are straightforward:
- Open the account: You deposit a lump sum (minimum deposits typically range from £500 to £10,000) with the provider.
- Lock-in period begins: Your money is locked for the agreed term - commonly 1, 2, 3, or 5 years.
- Interest accrues: Interest is calculated at the agreed fixed rate. It can be paid monthly, annually, or at maturity depending on the product.
- Maturity: At the end of the term, you receive your original deposit plus all interest earned.
FSCS Protection
Interest Payment Options
Fixed rate bonds offer different ways to receive your interest:
- On maturity: All interest is paid at the end of the term. This maximises compound growth but means no access to interest during the term.
- Annually: Interest is paid each year, either into the bond (compounding) or into a separate account. Useful if you want regular income.
- Monthly: Interest paid every month. Convenient for supplementing income but may offer a slightly lower effective rate.
Tax on Fixed Rate Bond Interest
Interest from fixed rate bonds counts as taxable income in the UK. However, most savers will not pay tax due to the Personal Savings Allowance (PSA):
- Basic rate taxpayers (20%): £1,000 PSA - no tax on first £1,000 of interest per year
- Higher rate taxpayers (40%): £500 PSA - no tax on first £500 of interest per year
- Additional rate taxpayers (45%): No PSA - all interest is taxable
At 4.75%, a £21,053 deposit would generate £1,000 interest per year - the basic rate taxpayer PSA limit. On a £10,000 bond at this rate, the interest (£475/year) falls well within the PSA for most savers.
For larger sums or higher earners, consider a Cash ISA for tax-free interest.
ISA Wrapper vs Fixed Rate Bond
Many providers offer fixed rate Cash ISAs which work exactly like fixed rate bonds but shelter your interest from tax entirely. The trade-off is that ISA rates are often slightly lower than equivalent non-ISA fixed bonds. If your total interest stays within your PSA, a regular fixed bond is simpler. If you are a higher earner or have substantial savings, a Cash ISA is usually better long-term.
Inflation Impact: Real Returns
When evaluating a fixed rate bond, consider the real return after inflation. If inflation runs at 3% and your bond pays 4.75%, your real return is approximately 1.75%. Use our inflation calculator to model this. Inflation erodes purchasing power, so locking in a good rate when inflation is falling can be advantageous.
NS&I Fixed Rate Bonds
National Savings and Investments (NS&I) offers government-backed fixed rate bonds (Guaranteed Growth Bonds and Guaranteed Income Bonds). These are 100% government guaranteed - not just up to £85,000 - making them appealing for larger sums. However, NS&I rates are not always the highest available. They are worth checking as part of your comparison, particularly for deposits over £85,000.
Best Fixed Rate Bond Providers
Top providers regularly appearing in best-buy tables include:
- Atom Bank - consistently competitive rates, app-only management
- Aldermore Bank - range of terms, FSCS protected
- Paragon Bank - established challenger bank, strong rates
- Charter Savings Bank - frequently top of best-buy tables
- Shawbrook Bank - competitive across multiple terms
- NS&I - government guaranteed, for larger sums
Fixed Rate Bond vs Easy Access Savings
The choice between a fixed rate bond and an easy access savings account depends on your circumstances. Easy access accounts now pay competitive rates (often 4.5-5% in 2025), so the premium for locking money away has narrowed. Key considerations:
- Do you have an emergency fund of 3-6 months expenses in accessible savings? If not, fill that first before locking money away.
- Are you likely to need the money within the bond term? If yes, stick with easy access.
- Is the rate premium worth the inflexibility? With spreads narrower in 2025, easy access is more competitive than ever.
How the Fixed Rate Bond Calculator Works
This calculator helps you understand your financial position using current UK rates and regulations for the 2025/26 tax year. Whether you are planning savings, evaluating loan options, or projecting investment growth, accurate calculations are essential for making informed decisions about your money.
UK financial products are regulated by the Financial Conduct Authority (FCA). Interest rates, fees, and terms vary significantly between providers, so comparing actual costs rather than headline rates is important. This tool gives you a clear picture to inform your comparisons.
Key Information for 2025/26
The Bank of England base rate is 4.5% as of early 2026. The Personal Savings Allowance lets basic rate taxpayers earn up to £1,000 in savings interest tax-free (£500 for higher rate taxpayers). The annual ISA allowance remains at £20,000, and the Lifetime ISA allowance is £4,000 with a 25% government bonus for first-time buyers or retirement savings.
Example Calculation
Saving £200 per month into an account earning 4.5% AER would grow to approximately £2,454 after one year, including £54 in interest. Over 5 years at the same rate, your £12,000 in contributions would grow to roughly £13,362, earning £1,362 in compound interest.
Source: Based on current UK financial rates. Last updated March 2026.
Frequently Asked Questions
What is a fixed rate bond in the UK?
A fixed rate bond, also called a fixed term savings account, is a savings product where you lock your money away for a set period (typically 1-5 years) in exchange for a guaranteed interest rate. The rate does not change during the term regardless of Bank of England base rate changes.
What are the best fixed rate bond rates for 2025?
In 2025, 1-year fixed rate bonds offer around 4.5-5%, 2-year bonds around 4.3-4.8%, and 5-year bonds around 4.0-4.5%. Rates vary by provider. NS&I, Atom Bank, Aldermore, and Paragon Bank regularly appear in best-buy tables.
Can I withdraw money from a fixed rate bond early?
Generally no. Fixed rate bonds require you to lock your money for the full term. Some providers allow early access with a significant interest penalty (often 90-180 days of interest). You should only put money in a fixed rate bond that you will not need during the term.
Is my money safe in a fixed rate bond?
Yes, up to £85,000 per person per banking licence is protected by the Financial Services Compensation Scheme (FSCS). If the bank fails, your money up to this limit is guaranteed. If you have more than £85,000 to save, spread it across multiple providers.
Do I pay tax on fixed rate bond interest?
Yes, interest from fixed rate bonds is taxable. Basic rate taxpayers have a Personal Savings Allowance (PSA) of £1,000 per year before paying tax. Higher rate taxpayers get £500 PSA.
Interest above the PSA is taxed at your marginal rate. Using a Cash ISA avoids all tax on interest.
How does a fixed rate bond compare to easy access savings?
Fixed rate bonds usually pay higher interest than easy access accounts in return for locking your money away. In 2025, easy access accounts pay around 4.5-5% while top fixed bonds may pay up to 5%. The difference is smaller than in previous years, so the flexibility of easy access is more attractive now.
What happens when a fixed rate bond matures?
When your fixed rate bond matures, the provider will contact you with options. You can typically withdraw all funds, reinvest in a new fixed term bond, or transfer to another account. If you do nothing, funds are often moved to a lower-rate easy access account, so always act promptly at maturity.
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Official Sources
Data verified against official UK government sources. Last checked April 2026.