UK Income Tax Overtime Exemption

The UK proposal to exempt overtime pay from income tax—framed as a “hard work bonus”—may be politically appealing, but it’s a flawed idea that undermines economic fairness, distorts labor markets, and jeopardizes taxA tax is a mandatory payment or charge collected by local, state, and national governments from individuals or businesses to cover the costs of general government services, goods, and activities. revenues. Under the proposal, employees earning under £75,000 would pay no income tax on hours worked beyond a 40‑hour week, a policy intended to increase take-home pay and encourage working additional hours.

However, this type of narrow tax proposal for specific forms of labor is unlikely to deliver meaningful economic gains and may instead introduce new distortions, inequities, and fiscal costs.

Exempting Overtime Is Inequitable, Distortive, Complex, and Costly

This policy creates a clear form of horizontal inequity within the tax system, as two workers with identical annual incomes could face markedly different tax burdens based solely on the structure of their work. By taxing overtime differently, it arbitrarily favors those in roles that offer additional hours, while disadvantaging individuals who cannot access such opportunities—such as caregivers or workers bound by fixed schedules. This lack of a coherent policy rationale results in unequal treatment among people in the same financial position.

Second, this exemption would introduce distorted incentives for employers, workers, and policymakers. By exempting overtime from taxation, firms may have less motivation to increase base salaries, effectively relying on tax advantages to compensate employees. Employers may also reorganize compensation structures to prioritize overtime instead of hiring additional staff, potentially reducing overall employment and promoting excessive working hours. A policy aimed exclusively at overtime hours focuses on workers already engaged in substantial work, rather than encouraging labor market entry or participation among those working fewer hours.

Additionally, because the exemption applies only below the £75,000 threshold, it produces an abrupt spike in the effective marginal tax rate. Such an extremely high marginal tax rate on the last pound of income distorts incentives by penalizing additional work once the threshold is crossed. At the same time, workers earning just below the eligibility threshold may seek to reclassify portions of their income as overtime to benefit from the exemption. This creates opportunities for exploitation, particularly among professionals such as lawyers or consultants. Such dynamics not only open the door to tax avoidance but may also hinder broader efforts aimed at achieving meaningful and comprehensive tax reform.

Third, this policy increases complexity in tax administration and creates opportunities for avoidance. The need to distinguish between regular pay and overtime introduces additional administrative burdens for both employers and tax authorities, raising the likelihood of errors and making the system more susceptible to evasion.

Finally, the fiscal costs of this policy are significant and poorly targeted. While proponents claim that a “hard work bonus” could save a full-time nurse working six overtime hours per week more than £1,300 annually—roughly £4 per hour, or a little more than the cost of a cup of coffee—the overall measure would reduce government revenues by around £5 billion each year. This revenue loss is equivalent to about one-fifth of the tax increases announced in the 2025 Autumn Budget. Supporters suggest offsetting this loss through cuts to welfare spending, raising further concerns about its distributional impact. However, evidence from similar measures suggests that such static estimates often understate the true fiscal impact once individuals adjust their behavior. In the context of persistent fiscal pressures in the UK, policymakers need to consider carefully whether narrowly focused tax relief is the most effective and efficient use of limited public resources.

A Better Alternative: Broad Tax Reform

If the objective is to improve incentives to work and increase take-home pay, policymakers have more effective tools at their disposal. Rather than creating narrowly targeted exemptions, lowering marginal income tax rates across the board or increasing tax-free allowances would provide more uniform and predictable incentives for work, while avoiding the distortions associated with special tax preferences. This approach is more neutral, simple, and efficient—and it’s more likely to increase the labor supply, which will consequently enhance both economic output and the tax baseThe tax base is the total amount of income, property, assets, consumption, transactions, or other economic activity subject to taxation by a tax authority. A narrow tax base is non-neutral and inefficient. A broad tax base reduces tax administration costs and allows more revenue to be raised at lower rates..

Exempting overtime may appear beneficial for workers at first glance, but it’s ultimately a short-term solution with significant long-term consequences. It creates unequal outcomes among workers with the same incomes, distorts incentives in the labor market, and places added strain on public finances—while doing little to support those most in need.

A more effective strategy would focus on comprehensive, broad-based tax reform that lowers the tax burden on work across the board. By doing so, policymakers can support economic growth and improve living standards without introducing the unintended consequences that often accompany narrowly targeted tax breaks.