Cash ISA

Suffolk Building Society Single Access ISA Review

A competitive cash ISA from Suffolk Building Society. It ranks 42nd of 137 cash ISAs we track.

Variable rate

3.75%AER

Rate checked Oct 2026Got this account? Leave a review

Protection

FSCS£120,000

Min balance

£100

Max balance

£500,000

Access

1 withdrawal/year

Interest paid

Annually or Monthly

Transfers in

Accepted

How It Stacks Up

Ranks 42nd of 137

Cash ISAs we track

Above average
This account 3.75%
UK CPI (Aug 2026)
3.10%
Pays 0.65% more
Average cash ISA
2.98%
Pays 0.77% more
Best cash ISA
4.87%
Pays 1.12% 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 0.85% more than this Suffolk Building Society account
  • Includes a 1.00% bonus for 12 months, then 3.60%
Compare Cash ISAs

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Pros and cons

  • Pro: Savers who want a monthly income
  • Con: The rate is variable, so it can go down

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Estimated returns with Suffolk Building Society's Cash ISA

What you could earn with Suffolk Building Society's Single Access ISA.

Estimated interest

£1,000 saved

£37.50

At 3.75% AER

£5,000 saved

£188

At 3.75% AER

£10,000 saved

£375

At 3.75% AER

£500,000 saved

£18,750

At 3.75% 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 Suffolk Building Society Single Access ISA

Jan WatermannCo-Founder, DepositScout

Suffolk Building Society's Single Access ISA pays 3.75%, which is below the cash ISA market average and 1.37% behind the category leader at 5.12%, so I would not call this a standout rate. It does beat August 2026 CPI of 3.1% by 0.65%, which at least preserves real value. The account accepts transfers in and takes a minimum of just £100, but the genuine catch is that you are limited to one withdrawal per year, so anyone who might need flexible access should look elsewhere, perhaps at Tembo's Standard Cash ISA at 4.00%.

Compare Cash ISAs

2 alternatives to Suffolk Building Society's Single Access ISA

Same type of account, closest on rate.

Common questions about the Single Access 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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