Barclays Instant Cash ISA Review

A cash ISA from Barclays. It ranks 130th of 137 cash ISAs we track.

Variable rate

1.00%AER

Protection

FSCS£120,000

Min balance

£1

Max balance

£10,000,000

Access

Instant

Interest paid

Monthly

Transfers in

Accepted

Barclays is also paying £300 to switch your current account.

See the switch offer

How It Stacks Up

Ranks 130th of 137

Cash ISAs we track

Well below average
This account 1.00%
UK CPI (Aug 2026)
3.10%
Pays 2.10% less
Average cash ISA
2.98%
Pays 1.98% less
Best cash ISA
4.87%
Pays 3.87% 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 3.60% more than this Barclays account
  • Includes a 1.00% bonus for 12 months, then 3.60%
Compare Cash ISAs

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A Good Fit For

  • Pro: New and existing savers
  • Pro: Savers who want instant access
  • 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

Worth Weighing Up

  • Con: The rate is variable, so it can go down

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Estimated returns with Barclays' Cash ISA

What you could earn with Barclays's Instant Cash ISA.

Estimated interest

£1,000 saved

£10.00

At 1% AER

£5,000 saved

£50.00

At 1% AER

£10,000 saved

£100

At 1% AER

£10,000,000 saved

£100,000

At 1% 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 Barclays Instant Cash ISA

Jan WatermannCo-Founder, DepositScout

The Barclays Instant Cash ISA pays 1.00%, which is below the market average for Cash ISAs and 4.12% behind the current market leader at 5.12%, so this is hard to recommend on rate alone. At 2.10% below August 2026 CPI of 3.1%, your money is losing real value in this account. The flexible ISA rules are genuinely useful, letting you withdraw and replace funds within the same tax year without losing your allowance, which suits people who need that flexibility, but Moneybox's Open Access Cash ISA at 3.80% offers similar instant access with a far better return.

Compare Cash ISAs

2 alternatives to Barclays's Instant Cash ISA

Same type of account, closest on rate.

Common questions about the Instant Cash ISA

D

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Easy Access rate just dropped

A top provider just cut their rate. Here's what you need to know about the latest market shift.

Nationwide FlexSaver Rate Down
4.20% AER
4.75%
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