Subnational governments account for 40% of public expenditure, corresponding to 16% of GDP, a proportion that has increased in recent decades for most countries.
In 2016, subnational government (SNG) expenditure stood at USD 6 820 per capita on average in the OECD area, accounting for 16.2% of GDP and 40.4% of total public expenditure ( 5.1). Among OECD countries, the SNG share of total public expenditure varied from less than 8% in Greece and Ireland, to 76.2% in Canada. SNG spending may vary according to whether the country is federal or unitary, its size and territorial organisation, the level of decentralisation and the nature of responsibilities for certain sectors ( 5.1).