Britain’s new prime minister has swiftly introduced measures aimed at easing the ongoing cost of living crisis, but questions remain about how the government plans to address the underlying tax challenges that continue to squeeze workers. Early in his tenure, the prime minister acknowledged the mounting frustration among voters over the frozen £12,570 personal allowance threshold—the level at which income tax begins—but it remains unclear whether this will prompt significant reform in the forthcoming autumn Budget.

The stagnant personal allowance contributes to what some analysts describe as a “stealth tax” on wages, gradually pulling more workers into higher tax brackets without adjusting headline rates. According to projections by the Office for Budget Responsibility, this fiscal drag could generate £55 billion in additional income tax revenue by 2030-31. Raising the personal allowance by £100, for example, is estimated to cost the Treasury about £1 billion annually. Such an increase would benefit low earners, pensioners, and individuals earning up to £100,000, but complex interactions with other tax provisions may blunt the impact.

A significant concern is the so-called “tax trap” triggered after the £100,000 income threshold. At this point, the personal allowance is tapered away at a rate of £1 lost for every £2 earned over the threshold, effectively creating a marginal tax rate of 60 percent. When combined with national insurance contributions and student loan repayments, some workers face marginal rates as high as 71 percent—exceeding those applied to millionaires with incomes above £125,140, where the marginal rate drops to 45 percent. This high effective tax rate discourages additional work, overtime, or accepting promotions, as individuals may keep only a fraction of additional earnings. Such distortions extend to the benefits system as well, where cliff edges for higher-earning parents and low-income carers create incentives to reduce working hours.

Policy responses under consideration vary. Some advocate for cuts to employers’ national insurance contributions for workers under 25 to stimulate employment among the estimated one million young people not in education, employment, or training. Others anticipate a potential reintroduction of the 50p top income tax rate, though this would reverse a recent manifesto pledge and increase the effects of fiscal drag. More radical proposals include implementing a land value tax, lowering thresholds for a proposed “mansion tax,” or reforming inheritance tax.

Adding to the debate, a group of over 100 wealthy individuals known as Patriotic Millionaires has publicly urged the government to shift focus toward taxing wealth and assets rather than earnings from labor. They propose a 2 percent levy on assets exceeding £10 million and equalizing capital gains tax rates with income tax, estimates that could potentially raise £36 billion annually, though some tax experts consider this figure optimistic. Efforts to align capital gains tax rates with income tax would not only affect the ultra-wealthy but also impact business owners, landlords, and investors at lower wealth levels. There are concerns such moves could discourage entrepreneurship and drive talent out of the country.

With the government facing urgent calls to address long-standing tax policy issues, the prime minister's approach to balancing immediate relief with sustainable reform will be closely scrutinized. Any changes risk significant economic and social consequences, underscoring the complexity of the challenges ahead.