Public sector spending is financed out of general taxation, which is determined by the budget.

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Each year in the Budget, the Chancellor presents to Parliament a statement of public sector finances, which includes:

  • an assessment of the economic outlook
  • projections for future spending and how this will be funded. (It is worth pointing out that without a budget, the government’s legal authority to levy taxes lapses.)

Chapter 4 Macroeconomic Policy and the supporting tables explain how the various items of spending and revenue are classified and how the Chancellor calculates his two fiscal rules.

In Table 10.3: Public Sector Current Tax Receipts, 2009-10, the source of the receipts is shown for the fiscal year 2009-10. The data are taken from the April 2009 Budget Book.

From the table it can be seen that taxes on income and wealth account for a slightly higher share than taxes on production and imports.

The third substantial sum comes from national insurance contributions. This is in principle a tax on jobs, paid by employers and employees, and could easily be categorised as a tax on income and wealth. This is in effect a tax on income and has been used by the Labour government, which promised not to raise income tax, as a revenue raiser.

Over the last decade, the share of government receipts accounted for by taxes on income and wealth has been edging up. In the 2009 Budget, Chancellor Darling announced the first increase in the higher rate of income tax since Labour took office in 1997. Previously, the top rate had been kept at 40%. Revenue, however, increased because there were more people working in 2007 and more people moving into the highest tax band at lower real salaries, the notion of fiscal drag.

Another point to note is that although income tax is a very sensitive political issue, it only raises about as much as all excise duties combined.

Impact of recession on public sector finances

A cursory glance at the Budget book reveals the impact the recession has had on public sector finances. In 2007-08 (the last full fiscal year of positive growth), current receipts amounted to £548 billion, since when they have fallen by 9.5%. As unemployment has increased, revenues from income tax have fallen by 7.5% and National Insurance contributions by 2.7%. VAT receipts are also less (-21%), partly because the Chancellor cut the rate and partly because spending growth slowed.

At a time of negative growth, Mr Darling has responded by allowing the deficit to rise to record levels rather than cut spending to match the falls in revenue.