TSB Cash ISA Saver Review

A cash ISA from TSB. It ranks 128th of 137 cash ISAs we track.

Headline rate

1.10%AER

Then 0.90% after 12 months

Protection

FSCS£120,000

Min balance

£1

Max balance

No limit

Access

Instant

Interest paid

Annually

Transfers in

Accepted

The Rate You'll Get

£1+

1.10%AER

0.90% without bonus

£25,000+

1.15%AER

0.95% without bonus

£50,000+

1.15%AER

0.95% without bonus

£100,000+

1.20%AER

1.00% without bonus

How It Stacks Up

Ranks 128th of 137

Cash ISAs we track

Well below average
This account 1.10%
UK CPI (Aug 2026)
3.10%
Pays 2.00% less
Average cash ISA
2.98%
Pays 1.88% less
Best cash ISA
4.87%
Pays 3.77% 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 3.50% more than this TSB 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 instant access
  • Con: Rate drops to 0.90% after 12 months

Good to Know

Open to UK residents aged 18 or over, with a minimum opening deposit of £1. Accounts can only be held in a sole name and can be opened via app (existing customers), online, or in branch.

Please verify all details with the provider – see our Disclaimer

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Estimated returns with TSB's Cash ISA

What you could earn with TSB's Cash ISA Saver.

Estimated interest

£1,000 saved

£11.00

At 1.1% AER

£5,000 saved

£55.00

At 1.1% AER

£10,000 saved

£110

At 1.1% AER

£50,000 saved

£575

At 1.15% 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 TSB Cash ISA Saver

Jan WatermannCo-Founder, DepositScout

The TSB Cash ISA Saver pays 1.10% on balances from £1, but that includes a 0.20% boost for the first 12 months, after which the rate drops to 0.90%. At 1.10%, it sits below the market average for Cash ISAs and is 4.02% behind the category leader at 5.12%, while also sitting 2.00% below CPI inflation of 3.1%, meaning your money loses real value. If you want instant access within an ISA wrapper and transfers in are a priority, this works, but I would seriously consider alternatives like the Moneybox Open Access Cash ISA at 3.80% first.

2 alternatives to TSB's Cash ISA Saver

Same type of account, closest on rate.

Common questions about the Cash ISA Saver

D

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Nationwide FlexSaver Rate Down
4.20% AER
4.75%
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