The UK Should Not Ignore Problems with its Corporate Tax Base

Wednesday, the United Kingdom will publish its 2021 budget, after the fall budget was delayed due to the pandemic. In addition, the UK government will launch several consultations on the future of the country’s tax strategy on March 23. Changes to the corporation tax—particularly an increase in the UK’s 19 percent corporation tax rate—are reportedly among the reforms under consideration.

While the UK is looking at ways to raise tax revenue to cover the revenue shortfalls and additional spending resulting from the COVID-19 pandemic, short- as well as long-term, investment will be crucial in getting the economy back on track and ensuring economic growth. Corporation tax policy can play a central role here; however, the focus should be on changes to the tax base rather than the tax rate.

More specifically, accelerated depreciation—or full expensing—of capital assets would decrease the marginal effective tax rate on investment, making new investment less costly. This, in turn, could boost investment and thus economic growth. A number of OECD countries—including Australia and Germany—have already implemented accelerated depreciation for various assets in 2020 to spur investment.

Over the past two decades, the UK has lowered its corporate income tax rate from 30 percent in 2000 to 19 percent since 2017.

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However, these reforms have often been paired with base-broadening measures that penalize new business investment. Between 2008 and 2013, the United Kingdom reduced the value of depreciation deductions for machines and industrial buildings. The present value deduction (the percent of the cost of an investment a company can deduct over its life) for machines fell from 83 percent to 76 percent between 2008 and 2013. Over the same period, the present value deduction for industrial buildings fell from 48 percent to zero.

Just in 2019, the UK reinstated a 2 percent annual allowance for industrial buildings, which was expanded to 3 percent in 2020, now allowing a value deduction of 62 percent. Despite this policy change, the UK’s capital allowances are on average still lower than in France and the U.S., and on par with Germany.

Comparison of Net Present Value of Capital Cost Allowances, as of March 2020
Country Machinery Industrial Buildings Patents Weighted Average
France 88% 55% 87% 74%
United States 100% 35% 63% 68%
United Kingdom 76% 39% 83% 62%
Germany 74% 39% 87% 62%

Note: Calculations assume a fixed inflation rate of 2.5 percent and fixed interest rate of 5 percent to calculate the present discounted values. The average is weighted by the capital stock’s respective share in an economy (machinery: 44 percent; industrial buildings: 41 percent; and intangibles: 15 percent).

Source: Elke Asen, “Capital Cost Recovery across the OECD,” Tax Foundation, Apr. 8, 2020, Calculations were updated to reflect the 3 percent structures and buildings allowance introduced as part of the UK’s 2020 Finance Bill.

The UK ranked 35th out of 36 countries in the OECD on the cost recovery portion of our 2020 International Tax Competitiveness Index. That portion includes capital allowances, as well as the tax treatment of losses, inventory costs, and equity, making it a composite measure of how pro-investment a country’s corporate tax base is.

Though the UK’s corporation tax rate is quite competitive among developed countries, the UK has a corporate tax base that is ripe for reform. The UK could provide immediate cost recovery for all investments, allowing businesses to deduct expenses for new investments immediately rather than relying on lengthy depreciation schedules to recoup only a fraction of their costs in real terms.

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