The UK government is considering changes to the tax-free personal allowance ahead of the Autumn Budget scheduled for October 28, as discussions intensify over the financial impact of the continuing freeze on this threshold. The personal allowance—currently set at £12,570—has been frozen since April 6, 2021, with the freeze extended until 2031 by former Chancellor Rachel Reeves. The decision has drawn concern for its effect on taxpayers, as inflation and wage growth push more individuals deeper into the tax system.

Experts warn that this freeze has already reduced take-home pay for the average basic-rate taxpayer by approximately £700 annually. Charlene Young, senior pensions and savings expert at AJ Bell, noted that had the allowance kept pace with inflation, it would now exceed £16,000, highlighting the financial strain felt by many households amid a cycle of what she termed "stealth tax increases."

Should the freeze persist through to 2031, the average taxpayer could face an additional annual tax burden nearing £960, depending on future inflation and earnings trends. There is public appetite for increasing the allowance; for instance, a £500 rise could provide a £100 annual tax saving to basic-rate earners. However, the fiscal cost is significant, as HM Revenue and Customs estimates each £100 increase in the allowance would reduce government revenues by about £1 billion per year. A full restoration in line with inflation could cost the Treasury an estimated £35 billion annually, posing challenges amid efforts to manage public finances.

High earners also face complicated tax dynamics. Those earning above £100,000 in England and Wales experience a tapering of their personal allowance, resulting in an effective marginal tax rate of 60% on income between £100,000 and £125,140, followed by the standard 45% additional rate beyond that. The starting threshold for this taper has remained at £100,000 since its introduction in 2010, effectively pushing more taxpayers into higher rates as nominal wages increase.

Young pointed to alternative strategies to increase workers’ disposable income, such as reducing National Insurance contributions by one percentage point, which could save a taxpayer earning £35,000 roughly £225 annually at an estimated government cost of £5.8 billion. Nevertheless, such a move could be less beneficial politically, as pensioners—who do not pay National Insurance—would see no direct benefit.

Scotland’s tax system differs, with the same personal allowance but higher tax bands and a top rate of 48% on income above £125,140. Wealth management firm Rathbones has noted that these higher rates and the complexity of Scotland’s taxation are influencing some high earners to consider working in Scotland while residing in England, thereby reducing their tax liabilities. Gordon Lawrie, head of Rathbones’ Edinburgh office, remarked that for individuals earning £250,000, the tax differential could amount to more than £46,000 over five years.

Scottish taxpayers affected by the allowance tapering face marginal tax rates of up to 67.5%, given the combination of income tax and taper effects. Observers caution that high taxation risks undermining economic competitiveness, deterring investment, and reducing growth, potentially leading to lower overall wealth if rates are pushed too far. As the government prepares its budget, balancing revenue needs with economic incentives remains a central challenge.