Falling UK tax revenue

A few years ago, I wrote several posts about the need for a government to borrow in a recession. One thing I would have said is that when the economy recovers, tax receipts will automatically rise and the deficit will fall. You could almost say ‘solve unemployment and the deficit will take care of itself.’

The logic is that even if you keep tax rates the same, economic recovery will lead to higher tax revenues, for example,

  • With greater consumer spending – VAT and Excise duty revenues will rise
  • Rising incomes will lead to higher income tax and NICs.
  • Greater profitability will lead to higher corporation tax.
  • Recovery will help housing market and stockmarket lead to more stamp duty and capital gains.

However, one feature of this recovery is that tax revenues have proved disappointing. Tax revenues have increased by a small amount, but as a % of GDP, tax receipts are struggling to keep up. In particular, corporation tax and income tax have fallen behind schedule.


This shows overall nominal HM Revenue and Custom revenues. Not adjusted for inflation.  (Note. This also excludes other sources of Government revenue) See Tax revenue sources for more detail.

  • In 2007/08, tax receipts were £451 bn
  • In 2013/14 tax receipts were £489 bn

This is very weak growth, when you remember these are nominal figures.

Sources of tax revenue



Changes in tax composition


Source: IFS Green Budget 2014

Why are tax revenues falling behind?

Income tax – The recovery has not lead to the expected rise in real wages. With low productivity, wage growth has been stagnant. Therefore, NICS and income tax have not increased like we might expect. The income tax system is quite progressive. The income tax threshold is over £10,000. Therefore, low paying jobs lead to little increase in income tax. If wages rise, we can expect a bigger increase in income tax receipts. One estimate of the HM Revenue and Customs is that a 1% rise in wages, leads to a 1.5% rise in tax receipts because of the progressive nature of the tax system.

An increasing number of both employed and self-employed have an income less than £10,000 (BBC link) The number of self-employed who earn less than £10,000 has increased from 20% in 2008 to 35% in 2014. This is one consequence of the flexible labour market and growth in number of part-time, temporary low wage jobs. But, it is bad news for tax collection.

Sin taxes

In 1989, sin taxes (alcohol, gambling, tobacco) accounted for 5.5% of tax revenue, this is expected to fall to 3.7% of GDP by 2018. Ironically, this is partly due to the success of tobacco tax and other policies to reduce smoking rates. With fewer people smoking, tax revenues are falling, even though tax rates go up.

Fuel taxes and vehicle excise duty

Fuel taxes are also expected to fall from 6.2% of tax revenue to 4.9%. In particular, revenue from fuel duty is falling because cars are becoming more fuel efficient. Combined with the freeze in fuel duty, the amount of tax motorists are paying is falling in real terms.

Corporation tax

This is forecast to fall from 11% of tax revenue to 5.7%. In 2007, corporation tax raised £46,383 million. In 2013/14 this had fallen to £39,274. It has continued to fall in the past two years of the economic recovery

Stamp duty

Stamp duty is highly volatile, with the housing crash causing a fall in prices and volumes. This led to lower revenues. However, the resurgence of the housing market will lead to improved revenues.


The disappointing tax revenues show the importance of not just falling unemployment, but also rising wages. Without rising real incomes we will continue to see weak income tax revenues.

A very quiet expansionary fiscal policy?

One thing that strikes me is that all these weak tax revenues are in a way a very careful example of expansionary fiscal policy. People are paying less fuel duty, less income tax, less sin taxes; therefore, discretionary incomes are rising more than we might expect. Don’t tell anyone  but very quietly the government have been pursuing a form of expansionary fiscal policy by keeping the tax burden lower than we might expect.

Tax rates can be increased

In the long term, sometimes you have to respond to falling tax revenues by increasing tax rates. For example, there is a good case for increasing petrol tax to compensate for the increased fuel efficiency.

We can afford more spending if we want to


With tax revenues as a % of GDP very low by historical standards, it shows there is room for increasing and widening the tax base to attract more tax revenue. To deal with the gap between government spending and tax revenue, we don’t need to just rely on cutting spending, we could increase tax rates.

Reliance on a shrinking tax basis

A paradox of the rising inequality in the UK, is that tax revenue comes from an increasingly small base. In regard to income tax, we are reliant on the top 1% of high earners to pay an increasing amount of tax. The IFS state that:

“The top 1% of contributors (around 300,000 individuals) contributed 27.5% of income tax receipts in 2011/12 (Green report, IFS)

The UK tax system is, in parts, quite progressive. But, there is a danger of relying on a smaller tax base that tax revenue becomes more volatile. It may also increase the risk of tax evasion.


0 thoughts on “Falling UK tax revenue”

  1. hi

    i am just a so called hrad working person, who is employed in the transport industry.
    through the various recessions i have seen i have never seen the transport industry stand down vehicles and this seems to be happening with various large companies, ie
    BT, Elddis,Sobarts,Car Transport companies, could this be a sign that this quarters figues will show a drop in gdp or could it be a simple answer that because of the state of the economy in europe they are flooding the uk with their vehicles and under cutting the uk transport companies. previously i have seen in a recession first the construction goes then transport, this includes the railways their goods trains are running with empty spaces this i have notices of up to 50%


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