Banks and building societies are increasing interest rates on fixed-rate Cash ISAs as inflationary pressures and the potential for rising interest rates encourage more competitive savings products. Analysis of the top 30 one-year fixed-rate Cash ISAs reveals that the average interest rate has risen to 4.36% from 4.03% since February, with 21 of these products offering higher returns, according to data compiled by Investec Save.

David Hunt, head of deposits at Investec Save, noted that the market for fixed Cash ISAs has become notably more competitive this year. He advised savers to consider locking in tax-free returns early in the new tax year, highlighting the benefit of fixed rates in providing certainty amid economic fluctuations. Hunt also emphasized the importance of taking advantage of current allowances, citing forthcoming changes to Cash ISA limits. Beginning April 6, 2027, the Cash ISA allowance will decrease to £12,000 for savers under 65, while remaining unchanged for those older than 65.

Caitlyn Eastell, a personal finance analyst at Moneyfactscompare.co.uk, stated that heightened competition is contributing to better interest rates across savings products. However, she cautioned that consumers would need to actively switch from lower-yield accounts to capture these advantages. “This presents a valuable opportunity to maximise returns, particularly for those still holding cash in low-paying accounts,” Eastell said.

Longer-term fixed-rate options also offer competitive yields. For example, Close Brothers Savings currently offers 4.66% annually on a five-year fixed Cash ISA with a minimum deposit of £10,000, while United Trust Bank provides 4.58% for the same term and a minimum £5,000 investment.

As inflation persists and interest rate decisions loom, savers are encouraged to review their ISA options to secure tax-free, stable returns amid an evolving economic environment.