Cash ISA

Dudley Building Society Cash ISA Instant Review

A competitive cash ISA from Dudley Building Society. It ranks 36th of 137 cash ISAs we track.

Variable rate

3.80%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

Not accepted

How It Stacks Up

Ranks 36th of 137

Cash ISAs we track

Above average
This account 3.80%
UK CPI (Aug 2026)
3.10%
Pays 0.70% more
Average cash ISA
2.98%
Pays 0.82% more
Best cash ISA
4.87%
Pays 1.07% 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 0.80% more than this Dudley Building Society 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

Worth Weighing Up

  • Con: The rate is variable, so it can go down
  • Con: It doesn't accept transfers in from other ISAs

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.

Estimated interest

£1,000 saved

£38.00

At 3.8% AER

£5,000 saved

£190

At 3.8% AER

£10,000 saved

£380

At 3.8% AER

£500,000 saved

£19,000

At 3.8% 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

Jonny PeaseCo-Founder, DepositScout

Dudley Building Society's Cash ISA Instant pays 3.80%, which is below the market average for Cash ISAs and sits 1.32% behind the category leader at 5.12%, so I wouldn't call this a standout rate. It does at least beat August 2026 CPI of 3.1% by 0.70%, meaning your money holds real value in the short term. The account suits savers who want instant access and a minimum of just £100 to open, though the fact that it doesn't accept ISA transfers in is a real limitation. If you want something comparable or better with instant access, Tembo's Standard Cash ISA currently pays 4.00%.

Compare Cash ISAs

2 alternatives to Dudley Building Society's Cash ISA Instant

Same type of account, closest on rate.

Common questions about the Cash ISA Instant

D

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