NatWest Cash ISA Review

A cash ISA from NatWest. It ranks 125th of 137 cash ISAs we track.

Variable rate

1.15%AER

Up to 2.45% on some tiers

Protection

FSCS£120,000

Min balance

£1

Max balance

No limit

Access

Instant

Interest paid

Monthly

Transfers in

Accepted

NatWest is also paying up to £500 to switch your current account.

See the switch offer

Rate Tiers

£1 – £24,999

1.15%AER

£25,000+

2.45%AER

How It Stacks Up

Ranks 125th of 137

Cash ISAs we track

Well below average
This account 1.15%
UK CPI (Aug 2026)
3.10%
Pays 1.95% less
Average cash ISA
2.98%
Pays 1.83% less
Best cash ISA
4.87%
Pays 3.72% 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 3.45% more than this NatWest 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
  • Pro: Savers who want a monthly income

Worth Weighing Up

  • Con: The rate is variable, so it can go down
  • Con: Not flexible: money you withdraw can't be replaced without using more allowance

Good to Know

Open to existing NatWest current account customers.

Please verify all details with the provider – see our Disclaimer

See all NatWest accounts

Estimated returns with NatWest's Cash ISA

What you could earn with NatWest's Cash ISA.

Estimated interest

£1,000 saved

£11.50

At 1.15% AER

£5,000 saved

£57.50

At 1.15% AER

£10,000 saved

£115

At 1.15% AER

£50,000 saved

£1,225

At 2.45% 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 NatWest Cash ISA

Jan WatermannCo-Founder, DepositScout

The NatWest Cash ISA pays 1.15% on balances up to £24,999, rising to 2.45% at £25,000 or more, but even the higher tier sits well below the cash ISA market average, and the headline rate is 3.97% behind the market leader at 5.12%. With CPI at 3.1%, the 1.15% rate leaves you 1.95% behind inflation in real terms. If you want instant access within an ISA wrapper, Moneybox's Open Access Cash ISA at 3.80% is worth a look instead.

Compare Cash ISAs

2 alternatives to NatWest's Cash ISA

Same type of account, closest on rate.

Common questions about the Cash ISA

D

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4.20% AER
4.75%
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