Cash ISA

Paragon Bank 15 Month Fixed Rate Cash ISA Review

A 15-month cash ISA from Paragon Bank. It ranks 2nd of 3 15-month cash ISAs we track.

Fixed rate · 15 months

4.75%AER

Rate checked Oct 2026Got this account? Leave a review

Protection

FSCS£120,000

Min balance

£500

Max balance

£500,000

Access

15 Months

Interest paid

Monthly/Annually

Transfers in

Accepted

How It Stacks Up

Ranks 2nd of 3

15-month cash ISAs we track

Close to the best
This account 4.75%
UK CPI (Aug 2026)
3.10%
Pays 1.65% more
Average 15-month cash ISA
4.72%
About the same
Best 15-month cash ISA
4.85%
Pays 0.10% less

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

Compare cash ISAs

A Good Fit For

  • Pro: New and existing savers
  • Pro: Savers who want a monthly income
  • Pro: Flexible: take money out and put it back in the same tax year without using more allowance

Good to Know

UK residents for tax aged 18+, single name only. Open to new and existing customers online or by post (and by Power of Attorney via phone). Needs a nominated UK current account in your name. Pay in at least £500 within 28 days of applying; no deposits after that. If you don't choose a maturity option, the money moves into Paragon's Easy Access Cash ISA.

Please verify all details with the provider – see our Disclaimer

See all Paragon Bank accounts

Estimated returns with Paragon Bank's Cash ISA

What you could earn with Paragon Bank's 15 Month Fixed Rate Cash ISA.

Estimated interest

£1,000 saved

£59.72

At 4.75% AER

£5,000 saved

£299

At 4.75% AER

£10,000 saved

£597

At 4.75% AER

£500,000 saved

£29,862

At 4.75% AER

Estimated over the 15-month term, if the rate stays the same and interest is left in. Amounts outside the account's minimum or maximum aren't shown.

Our Expert Opinion on Paragon Bank 15 Month Fixed Rate Cash ISA

Jan WatermannCo-Founder, DepositScout

Paragon Bank's 15 Month Fixed Rate Cash ISA pays 4.75%, which sits above the cash ISA market average but 0.50% behind the category leader at 5.25%, so it is decent without being the best available. The rate does beat CPI inflation of 3.1% by 1.65 percentage points, which at least means your money grows in real terms. It suits savers who want a slightly longer fix than a standard one-year deal and can leave at least £500 untouched, but the early-exit penalty of 120 days' interest is a genuine catch, and closing within the first 120 days could leave you with less than you deposited.

Compare Cash ISAs

2 alternatives to Paragon Bank's 15 Month Fixed Rate Cash ISA

Same type of account, closest on rate.

Common questions about the 15 Month Fixed Rate Cash ISA

D

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