Cash ISA

Suffolk Building Society Additional Permitted Subscription ISA Review

A cash ISA from Suffolk Building Society. It ranks 117th of 137 cash ISAs we track.

Variable rate

1.60%AER

Rate checked Oct 2026Got this account? Leave a review

Protection

FSCS£120,000

Min balance

£10

Max balance

£500,000

Access

Instant

Interest paid

Annually

Transfers in

Accepted

How It Stacks Up

Ranks 117th of 137

Cash ISAs we track

Well below average
This account 1.60%
UK CPI (Aug 2026)
3.10%
Pays 1.50% less
Average cash ISA
2.98%
Pays 1.38% less
Best cash ISA
4.87%
Pays 3.27% 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 3.00% 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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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

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Estimated returns with Suffolk Building Society's Cash ISA

What you could earn with Suffolk Building Society's Additional Permitted Subscription ISA.

Estimated interest

£1,000 saved

£16.00

At 1.6% AER

£5,000 saved

£80.00

At 1.6% AER

£10,000 saved

£160

At 1.6% AER

£500,000 saved

£8,000

At 1.6% 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 Additional Permitted Subscription ISA

Jonny PeaseCo-Founder, DepositScout

The Additional Permitted Subscription ISA from Suffolk Building Society is a niche product designed specifically for the surviving spouse or civil partner of a deceased ISA holder, allowing them to deposit inherited ISA savings outside the usual annual ISA allowance. At 1.60%, the rate is 3.52% below the cash ISA market leader at 5.12%, sits below the market average, and is 1.50% below CPI inflation of 3.1%, meaning money here loses real value. If you need to use this account type, I would still check whether a provider like Moneybox at 3.80% offers the same APS facility before settling here.

Compare Cash ISAs

2 alternatives to Suffolk Building Society's Additional Permitted Subscription ISA

Same type of account, closest on rate.

Common questions about the Additional Permitted Subscription ISA

D

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4.20% AER
4.75%
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