Does cutting corporate tax rates increase revenue?

The UK has proposed a cut in the rate of corporation tax from 20% to 15%, this would give the UK one of the lowest rates of corporation tax in the OECD, and proponents argue this could actually lead to higher tax revenues as more firms will invest in the UK. Therefore, although the tax rate falls, total tax revenue could rise.


This is theoretically possible. If Apple, Google moved to the UK to benefit from a low corporate tax rate, this could offset the fall in corporation tax revenues from existing firms.

However, there is no guarantee that a lower corporation tax rate will encourage firms will move to the UK. It depends on the economic climate and also any potential response from other countries.

Fall in global corporation tax rates

In recent decades we have seen lower corporation tax in most major OECD economies.

fall in corporation tax rates
Source: – Corporate tax rate matters
Source: Tax Foundation

Tax Foundation find a similar trend, though this graph is just since 2003

In other words, the world has seen a general fall in global corporation tax rates. This could be attributed to the competitive tendency to try and get the lowest tax rate or at least the need to keep up with other countries. For example, the Tax Foundation article, suggests there is strong pressure for the US to cut its corporation tax rate to remain competitive and avoid losing profitable IT giants seeking to avoid paying US tax rates..

This suggests there could really be a ‘beggar my neigbour’ attitude to corporation tax rates, and cutting tax rates does encourage other countries to follow suit.

Why no global competition for income tax ?

One question might be – why do we not see this with say income tax rates?

For most workers, the option of moving to work in the US because of lower income tax rates is not practical. Perhaps for some highly paid financial sector workers or even doctors – this maybe an issue. But for the vast majority of workers, they will not move to another country because of differing income tax rates. However, for multinational companies paying millions of dollars in corporation tax – it is worth the effort of moving to a lower tax rate regime.

Does cutting corporation tax rates change revenue?



Source: – Corporate tax rate matters


The link between corporate tax rates and income is not clear. This plots corporate income tax rates (%) and corporate income tax revenues as a % of GDP. This states there is a very weak relationship. A corporate tax rate of 60% can give same tax revenue as a corporate tax rate of 15%.

  • You can look at this in two ways. You can argue raising corporation tax rates will have little effect in increasing tax revenue. Or cutting tax rates has no impact in decreasing tax revenues.
  • You could argue that lower corporation tax enables more retained profit to be used for investment. Therefore, cutting corporation tax could help increase economic growth – regardless of how other countries react.
  • However, in the era of higher corporation tax  (50s and 60s) – we saw higher rates of economic growth than in the past decade with much lower corporation tax rates.
  • An important question is what percentage of the increased retained profit will be used for investment or whether it will be used to increase cash reserves / dividends to shareholders.

Game theory and corporation tax

  • However, it is difficult to make assumptions based on this graph. The impact of a change in corporation tax cannot be taken in isolation. It depends on what other countries do.
  • For example, if UK cut corporation tax rate to 15% and others maintain the same tax rates – you could expect it to increase inward investment and possibly tax revenue for the UK.
  • However, if others follow suit and cut to the same rate, there will be a very different effect. The UK will not gain any competitive advantage from the tax cut.
  • It becomes an example of game theory – the outcome of a choice on tax rates – depends on how other countries respond.
  • The big question is how will other countries respond to UK cutting corporation tax rate? Perhaps with losing access to Single Market they may not feel threatened and not cut corporation tax. Alternatively they may feel it is an attempt to gain an unfair advantage of inward investment and respond in some form.

Welfare implications of cutting corporation tax rates

  • In the short term, there is maybe a benefit from cutting corporation tax – to have a lower rate than other countries. This lower rate will be a factor in encouraging investment and firms to have their tax base in low tax countries. However, this initial benefit of lower corporation tax has to be viewed in light of general downward trend in corporation tax rates.
  • Cutting corporation tax rates has become a general global trend. If UK cuts corporation tax, you would expect some of our competitors to follow suit and this competitive tax advantage may be short lived.
  • If this does occur, the main beneficiaries are companies who get to keep a bigger share of profit. The taxpayer loses out because income and expenditure taxes have to rise to compensate.
  • However, this is complicated by the fact lower corporation tax (regardless of global competitors), may give more retained profit and encourage firms to invest more in future capacity, increasing economic growth.
  • Cutting corporation tax rates may be one reason for the very significant rise in cash reserves of major companies. According to FT, the net cash position of FTSE 100 companies has risen from £12.2bn in 2008 to £73.9bn this year in 2013. See: Cash reserves of major companies
  • There is a good welfare case for efforts to harmonise corporation tax rates to avoid tax competition, tax avoidance and the rise of huge cash reserves which lead to welfare loss.


Beggar my neighbour – cutting corporation tax

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