Cash ISACompare 2 Year Fixed Rate Cash ISAs

Principality Building Society 2 Year Fixed Rate Cash ISA Review

A competitive two-year cash ISA from Principality Building Society. It ranks 25th of 53 two-year cash ISAs we track.

Fixed rate · 2 years

4.70%AER

Rate checked Oct 2026Got this account? Leave a review

Protection

FSCS£120,000

Min balance

£500

Max balance

£20,000

Access

At maturity only

Interest paid

Annually

Transfers in

Accepted

How It Stacks Up

Ranks 25th of 53

2-year cash ISAs we track

Above average
This account 4.70%
UK CPI (Aug 2026)
3.10%
Pays 1.60% more
Average 2-year cash ISA
4.56%
Pays 0.14% more
Best 2-year cash ISA
5.08%
Pays 0.38% less

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

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Pros and cons

  • Pro: New and existing savers
  • Con: Your money is locked in for 2 years

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Estimated returns with Principality Building Society's Cash ISA

What you could earn with Principality Building Society's 2 Year Fixed Rate Cash ISA.

Estimated interest

£1,000 saved

£96.21

At 4.7% AER

£5,000 saved

£481

At 4.7% AER

£10,000 saved

£962

At 4.7% AER

£20,000 saved

£1,924

At 4.7% AER

Estimated over the 24-month term, 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 Principality Building Society 2 Year Fixed Rate Cash ISA

Jonny PeaseCo-Founder, DepositScout

Principality's 2 Year Fixed Rate Cash ISA pays 4.70%, which sits above the cash ISA market average but is 0.55% behind the category leader at 5.25%, so it is decent without being the best available. It beats August 2026 CPI of 3.1% by 1.60%, which is the real point for savers wanting inflation protection. The hard catch is no access until maturity, so only commit money you can lock away for two years. The minimum is £500 and the maximum £20,000, and it accepts ISA transfers in.

Compare Cash ISAs

2 alternatives to Principality Building Society's 2 Year Fixed Rate Cash ISA

Same type of account, closest on rate.

Common questions about the 2 Year Fixed Rate Cash ISA

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