Cash ISA

Vernon Building Society 90-Day Cash ISA Review

A competitive cash ISA from Vernon Building Society, with a £1,000 minimum deposit. It ranks 61st of 137 cash ISAs we track.

Variable rate

3.35%AER

Rate checked Oct 2026Got this account? Leave a review

Protection

FSCS£120,000

Min balance

£1,000

Max balance

No limit

Access

90 Days

Interest paid

Annually

Transfers in

Not accepted

How It Stacks Up

Ranks 61st of 137

Cash ISAs we track

Above average
This account 3.35%
UK CPI (Aug 2026)
3.10%
Pays 0.25% more
Average cash ISA
2.98%
Pays 0.37% more
Best cash ISA
4.87%
Pays 1.52% less

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

Compare cash ISAs

A Good Fit For

  • Pro: New and existing savers

Worth Weighing Up

  • Con: The rate is variable, so it can go down
  • Con: You need at least £1,000 to open it
  • Con: It doesn't accept transfers in from other ISAs

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Estimated returns with Vernon Building Society's Cash ISA

What you could earn with Vernon Building Society's 90-Day Cash ISA.

Estimated interest

£1,000 saved

£33.50

At 3.35% AER

£5,000 saved

£168

At 3.35% AER

£10,000 saved

£335

At 3.35% AER

£50,000 saved

£1,675

At 3.35% 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 Vernon Building Society 90-Day Cash ISA

Jonny PeaseCo-Founder, DepositScout

Vernon Building Society's 90-Day Cash ISA pays 3.35%, which is below the market average for cash ISAs and 1.77% behind the category leader at 5.12%, so I would not call this a standout rate. It does edge above August 2026 CPI inflation of 3.1% by 0.25%, meaning your money is at least holding its real value in the short term. The genuine catch here is the 90-day notice period, so this is not a pot you can dip into freely, and you cannot transfer existing ISA balances in. It suits someone opening a fresh ISA who is comfortable locking away at least £1,000 with notice.

Compare Cash ISAs

2 alternatives to Vernon Building Society's 90-Day Cash ISA

Same type of account, closest on rate.

Common questions about the 90-Day Cash ISA

D

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