Cash ISA

The Co-operative Bank Online Cash ISA Review

A cash ISA from The Co-operative Bank. It ranks 108th of 137 cash ISAs we track.

Variable rate

2.00%AER

Needs a Co-operative Bank current account

Rate checked Oct 2026Got this account? Leave a review

Protection

FSCS£120,000

Min balance

£1

Max balance

£20,000

Access

Instant

Interest paid

Annually

Transfers in

Accepted

How It Stacks Up

Ranks 108th of 137

Cash ISAs we track

Well below average
This account 2.00%
UK CPI (Aug 2026)
3.10%
Pays 1.10% less
Average cash ISA
2.98%
Pays 0.98% less
Best cash ISA
4.87%
Pays 2.87% less

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

A better-paying alternative

Trading 212 bank logo

Trading 212

Cash ISA

4.60%

AER

  • Pays 2.60% more than this The Co-operative Bank account
  • Includes a 1.00% bonus for 12 months, then 3.60%
Compare Cash ISAs

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A Good Fit For

  • Pro: Savers who want instant access

Worth Weighing Up

  • Con: The rate is variable, so it can go down
  • Con: You need a Co-operative Bank current account to open it

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Estimated returns with The Co-operative Bank's Cash ISA

What you could earn with The Co-operative Bank's Online Cash ISA.

Estimated interest

£1,000 saved

£20.00

At 2% AER

£5,000 saved

£100

At 2% AER

£10,000 saved

£200

At 2% AER

£20,000 saved

£400

At 2% 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.

Our Expert Opinion on The Co-operative Bank Online Cash ISA

Jonny PeaseCo-Founder, DepositScout

The Co-operative Bank's Online Cash ISA pays 2.00%, which is below the market average for Cash ISAs and sits 3.12% behind the current category leader at 5.12%. At 1.10% below August 2026 CPI of 3.1%, your savings are also losing ground to inflation in real terms. The account accepts transfers in and only needs £1 to open, but it is restricted to Co-operative Bank current account holders, so most savers would be better served looking elsewhere, with alternatives like the Moneybox Open Access Cash ISA currently paying 3.80%.

Compare Cash ISAs

2 alternatives to The Co-operative Bank's Online Cash ISA

Same type of account, closest on rate.

Common questions about the Online Cash ISA

D

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Nationwide FlexSaver Rate Down
4.20% AER
4.75%
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