Every year a government decides two numbers: how much it will spend and how much it will take in tax. Those two numbers look like accounting. They are not. Together they decide how much demand exists in the economy, who carries the burden of paying for the state, and whether the next generation inherits a debt or a surplus. Fiscal policy is the deliberate use of those two levers to steer the economy.
Fiscal policy
The use of government spending and taxation to influence the level of economic activity and to achieve macroeconomic aims.
The definition must contain both spending and taxation. Answers that say only 'changing taxes' are treated as incomplete, because a change in government spending with no tax change is still fiscal policy. Adding the purpose, that it is used to influence total demand, secures the second mark where two are available.
The government budget
The budget is simply the plan for revenue and spending over a year. Where tax revenue exceeds government spending there is a budget surplus. Where spending exceeds revenue there is a budget deficit, and the shortfall has to be borrowed. Accumulated deficits, added up over many years and net of any repayment, make up the national debt. A deficit is a flow measured over a year; the national debt is a stock measured at a point in time. Confusing the two is one of the most common errors in this topic.
Budget balance = total tax revenue - total government spendingA positive figure is a surplus, a negative figure is a deficit, and a figure of zero is a balanced budget. Cambridge does not print formulae in any 9708 paper, so this and every other expression in this note has to be recalled.
Governments spend for reasons that go well beyond managing demand. They provide public goods that no firm would supply, such as defence and street lighting. They provide merit goods such as healthcare and education that would otherwise be under-consumed. They pay transfer payments such as pensions and unemployment benefit, which redistribute income rather than buy output. And they invest in infrastructure, which raises the economy's productive capacity over the long run. Recognising which type of spending a question is about matters, because transfer payments do not directly add to aggregate demand while government purchases of goods and services do.
Government spending is also divided into current and capital spending. Current spending pays for the day-to-day running of public services and is used up within the year: the wages of teachers and nurses, medicines, and fuel for police vehicles. Capital spending is investment in assets that last for many years, such as new roads, hospitals, schools and railways. The distinction matters because capital spending adds to the economy's productive capacity, so borrowing to fund it is easier to justify than borrowing to fund current spending, and many governments set fiscal rules that treat the two differently.
Types of tax
Governments tax for more reasons than simply raising money, and the syllabus expects them set out. Taxes raise revenue to pay for government spending. They discourage the consumption of demerit goods, such as tobacco and alcohol, by raising their price. They redistribute income, since a progressive tax takes more from the rich. They help manage the economy, since raising or cutting taxes changes total demand. They can protect domestic industries, since tariffs make imports dearer. And they can correct externalities, such as a tax on pollution that makes the polluter pay for the damage done.
A direct tax is levied on income or wealth and is paid straight to the government by the person or firm on whom it falls, as with income tax and corporation tax. An indirect tax is levied on spending and is collected by the seller, as with value added tax and excise duties on fuel and tobacco. The distinction matters because the burden of an indirect tax can be shifted onto the consumer through a higher price, whereas the burden of a direct tax cannot be passed on so easily.
Taxes are also classified by how the burden changes as income rises. A progressive tax takes a rising proportion of income as income rises, so higher earners pay a larger share of what they earn. A proportional tax takes the same proportion at every income. A regressive tax takes a falling proportion as income rises, so it falls hardest on the poor. Most indirect taxes are regressive in effect, because a low earner spends a larger fraction of their income than a high earner does.
Progressive and regressive describe the proportion of income paid, not the amount. A rich person buying petrol pays more tax in absolute terms than a poor person, and candidates routinely conclude from this that fuel duty is progressive. It is regressive, because that larger amount is a smaller share of a much larger income. Always frame the answer in percentages.
Average rate of tax = (total tax paid / total income) x 100 Marginal rate of tax = (change in tax paid / change in income) x 100A tax is progressive when the marginal rate exceeds the average rate, proportional when they are equal, and regressive when the marginal rate is below the average rate. This test is the quickest way to classify a tax system from a data table.
Classifying a tax system from its bands
A country taxes income at 0% on the first $10,000, 20% on income between $10,001 and $50,000, and 32% on income above $50,000. Calculate the average and marginal rates of tax for a worker earning $60,000 and state whether the system is progressive.
Expansionary and contractionary fiscal policy
Expansionary fiscal policy means raising government spending, cutting taxes, or both. It increases total demand in the economy and is used when output is weak and unemployment is rising. Contractionary fiscal policy, sometimes called deflationary fiscal policy, means cutting spending or raising taxes. It reduces total demand and is used when the economy is overheating and inflation is climbing. The same instruments serve different aims depending on which direction they are pushed.
Fiscal policy is asked to do several jobs at once, and they do not always point the same way. Governments use it to promote economic growth, to reduce unemployment, to control inflation, to redistribute income from rich to poor through progressive taxes and welfare payments, and to improve the current account of the balance of payments. Cutting taxes to reduce unemployment will also raise inflationary pressure and pull in imports. That tension between objectives is where evaluation marks live.
Draw a circular flow of income diagram for an economy with a government sector. Label the flows between households and firms, then add taxation as a withdrawal and government spending as an injection. Mark clearly which arrow the government controls in each case.
The purpose of drawing it is to see why the two levers pull in opposite directions. Taxation takes money out of the flow, so raising it reduces the income circulating. Government spending puts money in, so raising it increases the income circulating. A budget deficit means injections from the government exceed withdrawals, which is why an unbalanced budget in that direction expands the economy.
A government cuts income tax rates and raises spending on infrastructure. This is best described as:
Which statement correctly distinguishes a budget deficit from the national debt?
How fiscal policy reaches the economy
At AS the mechanism has to be stated through aggregate demand rather than asserted. Aggregate demand is the total planned spending on domestic output at each price level, made up of consumption, investment, government spending and net exports. Government spending is a component in its own right, so a change in it shifts aggregate demand directly. Taxation works indirectly: income tax alters disposable income and therefore consumption, while corporation tax alters retained profit and therefore investment. Naming the component that moves is the step that converts a description into analysis.
AD = C + I + G + (X - M)Fiscal policy acts on G directly, on C through income tax and benefits, on I through corporation tax and investment allowances, and on M indirectly, since higher disposable income raises spending on imports as well as on domestic output.
How expansionary fiscal policy reduces demand-deficient unemployment
- The government raises spending on infrastructure and cuts the basic rate of income tax.
- Government spending G rises directly, and lower income tax raises households' disposable income.
- Higher disposable income raises consumption C, since some proportion of any extra income is spent rather than saved.
- Aggregate demand shifts right, because both G and C are components of AD.
- Firms respond to higher orders by raising output, since inventories are being run down.
- Labour is a derived demand, so producing more output requires employing more workers.
- Employment rises and demand-deficient unemployment falls, while real GDP increases.
- The initial spending becomes income for construction workers and suppliers, who spend a share of it in turn, so the final rise in national income exceeds the initial injection.
AO2 analysis carries 40% of the marks, and it is the linking that earns them. The weakest version of this answer is 'the government spends more so unemployment falls'. Every arrow above is a separate creditable step.
Practise this chain →Draw an AD/AS diagram showing an economy operating below full employment. Show the effect of expansionary fiscal policy, labelling the shift of AD, the change in real output and the change in the price level. Then repeat the shift on a diagram where AS is near-vertical.
The point of drawing it twice is the comparison. On the elastic section of AS most of the shift becomes extra real output with little price rise. Near full capacity the same shift is absorbed almost entirely by a higher price level, so the policy delivers inflation instead of growth. Examiners reward candidates who make the outcome depend on where the economy currently sits rather than assuming the convenient case.
Not all fiscal changes are decisions. Automatic stabilisers are features of the tax and benefit system that moderate the cycle without anyone acting. In a downturn, incomes fall so income tax receipts fall, and unemployment rises so benefit payments rise. Both effects support disposable income and cushion the fall in aggregate demand, and both widen the deficit automatically. In a boom the same mechanisms run in reverse and restrain demand. Discretionary fiscal policy, by contrast, is a deliberate change of tax rates or spending plans announced by the government. Questions frequently hinge on separating the two, because a deficit that widens in a recession may reflect no policy decision at all.
Almost every fiscal policy answer improves if you state the starting position of the economy. The same tax cut is expansionary and largely non-inflationary in a deep recession, and almost purely inflationary at full capacity. Candidates who write 'the effect depends on the amount of spare capacity in the economy' and then use it are consistently in the higher bands.
During a recession a country's budget deficit widens even though the government has announced no change to tax rates or spending plans. The most likely explanation is:
Applied context
The scale of discretionary fiscal action during the pandemic response of 2020 and 2021 gave a rare natural experiment. Governments across advanced and emerging economies ran deficits of a size normally seen only in wartime, largely through transfer payments and wage support rather than public investment. Output recovered quickly once restrictions lifted, which supports the case for fiscal expansion when demand has collapsed. The subsequent inflation across those same economies is contested territory, since supply chain disruption and energy prices were operating simultaneously, and separating the fiscal contribution from those is not straightforward.
Use applied material to support a specific analytical point, not as decoration. A candidate who cites this to argue that fiscal expansion is effective against a demand shock but that its inflationary consequences depend on the state of supply is using it properly.