Cash ISA

Dudley Building Society Cash ISA Instant Online Review

One of the best-paying cash ISAs, from Dudley Building Society. It ranks 7th of 137 cash ISAs we track.

Variable rate

4.40%AER

Rate checked Oct 2026Got this account? Leave a review

Protection

FSCS£120,000

Min balance

£100

Max balance

£500,000

Access

Instant

Interest paid

Annually

Transfers in

Accepted

How It Stacks Up

Ranks 7th of 137

Cash ISAs we track

Among the best
This account 4.40%
UK CPI (Aug 2026)
3.10%
Pays 1.30% more
Average cash ISA
2.98%
Pays 1.42% more
Best cash ISA
4.87%
Pays 0.47% 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 instant access

Worth Weighing Up

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

Good to Know

Further information about ISAs can be obtained on the HM Revenue & Customers website www.hmrc.gov.uk. We do not allow ISA transfers into this account. Internal ISA transfers from existing Dudley Building Society ISAs are not allowed to fund this account.

Please verify all details with the provider – see our Disclaimer

See all Dudley Building Society accounts

Estimated returns with Dudley Building Society's Cash ISA

What you could earn with Dudley Building Society's Cash ISA Instant Online.

Estimated interest

£1,000 saved

£44.00

At 4.4% AER

£5,000 saved

£220

At 4.4% AER

£10,000 saved

£440

At 4.4% AER

£500,000 saved

£22,000

At 4.4% 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 Dudley Building Society Cash ISA Instant Online

Jan WatermannCo-Founder, DepositScout

Dudley Building Society's Cash ISA Instant Online pays 4.40%, which sits below the cash ISA market average and 0.72% behind the category leader at 5.12%, so it is not a rate I would lead with. That said, it does beat inflation by 1.30 percentage points against CPI of 3.1% in Aug 2026, and instant access with a £100 minimum makes it accessible enough for smaller savers who want flexibility. If you want a better easy-access ISA rate, the HL Cash ISA in our alternatives list offers 4.52% and is worth a look before committing here.

Compare Cash ISAs

2 alternatives to Dudley Building Society's Cash ISA Instant Online

Same type of account, closest on rate.

Common questions about the Cash ISA Instant Online

D

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Easy Access rate just dropped

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Nationwide FlexSaver Rate Down
4.20% AER
4.75%
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