What interest rate does the Castle Trust Bank 1 year Fixed Rate e-Saver pay?

The Castle Trust Bank 1 year Fixed Rate e-Saver pays 4.50% AER, fixed for one year.

How much interest could I earn?

Saving £10,000 for 1 year would earn about £450 at 4.50% AER. This assumes the rate stays the same and interest stays in the account.

How much can I pay in?

You can deposit at least £1,000 and up to £500,000.

Can I withdraw my money?

No. Your money is locked in until the fixed term ends, so only put in what you won't need before then.

When is interest paid?

Interest is paid at the end of the term.

Who can open this account?

New and existing Castle Trust Bank customers can open it. You can open it online or in the app.

Is my money protected?

Yes. Eligible deposits are protected by the Financial Services Compensation Scheme (FSCS) up to £120,000 per person, per banking licence.

How does it compare with other one-year fixed rate bonds?

At 4.50% AER it ranks 29th of 69 one-year fixed rate bonds we track. The best pays 5.12% and the average is 4.47%.

Dashboard

Fixed Rate

Castle Trust Bank 1 year Fixed Rate e-Saver Review

A one-year fixed rate bond from Castle Trust Bank, with a £1,000 minimum deposit. It ranks 29th of 69 one-year fixed rate bonds we track.

Rate checked Oct 2026Got this account? Leave a review

Fixed rate · 1 year

4.50%AER

Rate checked Oct 2026Got this account? Leave a review

Protection

FSCS£120,000

Min balance

£1,000

Max balance

£500,000

Access

At maturity only

Interest paid

On Maturity

How It Stacks Up

Ranks 29th of 69

1-year fixed bonds we track

Just above average

This account 4.50%

UK CPI (Aug 2026): 3.10%; Pays 1.40% more
Average 1-year fixed: 4.47%; About the same
Best 1-year fixed: 5.12%; Pays 0.62% less

Inflation: ONS. Averages and best rates: accounts on DepositScout.

Compare fixed bonds

A Good Fit For

Pro: New and existing savers

Worth Weighing Up

Con: Your money is locked in for 1 year
Con: You need at least £1,000 to open it

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Estimated returns with Castle Trust Bank's Fixed Rate

What you could earn with Castle Trust Bank's 1 year Fixed Rate e-Saver.

Estimated interest

£1,000 saved

£45.00

At 4.5% AER

£5,000 saved

£225

At 4.5% AER

£10,000 saved

£450

At 4.5% AER

£500,000 saved

£22,500

At 4.5% AER

Estimated over one year, if the rate stays the same and interest is left in. Amounts outside the account's minimum or maximum aren't shown.

Work out the tax on your interestSee how much of this interest could be taxed.

Our Expert Opinion on Castle Trust Bank 1 year Fixed Rate e-Saver

Jan WatermannCo-Founder, DepositScout

Castle Trust Bank's 1 Year Fixed Rate e-Saver pays 4.50%, which is 1.40% above CPI inflation of 3.1% (Aug 2026), so your money does grow in real terms, but the rate sits below the market average for fixed-rate accounts and 0.85% behind the current market leader at 5.35%. The real catch is the lock-in: no access until maturity, with withdrawals only considered in demonstrated financial hardship. If you want a one-year fix, I would look at OakNorth Bank's Fixed Term 12 Months at 4.96% or Atom Bank's 1 Year Fixed Saver at 4.90% before settling here.

Compare Fixed Rate Bonds