LONDON, August 14 — Against a backdrop of economic tightening, a quiet but dramatic shift is unfolding in British household finances: the number of savings accounts at risk of tax liability has surged by 1,047% since 2018. According to Yorkshire Building Society, the count of non-ISA savings accounts projected to earn over £1,000 in annual interest has climbed from 462,000 in January 2018 to 5.3 million in 2024. The mechanism is simple, the consequences far-reaching.
Frozen tax thresholds, rising interest rates, and persistent inflation have combined to push millions of savers into territory where their interest earnings now exceed the personal savings allowance. The allowance itself was introduced in April 2016, a policy designed to shield modest returns from the taxman.
Basic-rate taxpayers may earn up to £1,000 in tax-free savings interest per year; higher-rate taxpayers are permitted £500; additional-rate taxpayers receive no allowance at all. At the time, most easy-access accounts paid 1% or less—well below the threshold for most savers. Today, the majority offer 3% or more.
The arithmetic of exposure
What is at stake is the intersection of return and threshold. As interest rates rose, so did the earnings on deposits. Yet the personal savings allowance—like the income tax bands to which it is tied—has remained static.
The result: a growing portion of the population now faces tax on interest that once would have been sheltered. Any interest earned above the allowance is taxed at the individual’s standard income tax rate.
From policy cushion to fiscal drag
In the corridors of Whitehall, the phenomenon is an illustration of fiscal drag—where frozen thresholds, rather than explicit rate rises, increase the tax take. The personal savings allowance was conceived as a buffer for savers in an era of near-zero returns. Now, with inflation eroding real incomes and the Bank of England maintaining higher rates to combat it, that buffer is no longer sufficient for millions.
Yorkshire Building Society’s figures lay bare the pace of change. The jump from 462,000 to 5.3 million accounts at risk is not merely steep; it reflects a structural shift in the savings landscape.
Where once only the wealthiest or those with unusually large deposits might exceed their allowance, today a far broader cross-section of savers does so.
What to watch next
The wider picture hinges on two variables: the path of interest rates and the political appetite for tax threshold adjustments. Should rates remain elevated, the pressure on savers will only intensify. And with the personal savings allowance still tethered to the same frozen income tax bands, the number of accounts exposed to tax liability seems poised to climb further.
For now, the message to savers is clear. The era of effortlessly tax-free interest, for many, has come to an end.
