This 2023 edition of the OECD’s Tax Administration Series (TAS 2023) continues to highlight the scale and complexity of tax administration. Figure 0.1 shows that together the tax administrations participating in TAS 2023 collect net revenues of EUR 13.4 trillion and employ around 1.7 million staff. They deal with the tax affairs of more than 900 million personal income tax and corporate taxpayers who together contact tax administrations in excess of 450 million times via telephone, in-person, e-mail or paper and generate more than 2.3 billion contacts through online channels. That tax administrations do this on a combined operating budget amounting to around EUR 95 billion, equivalent to 0.7% of total revenues collected, reflects their efficiency and effectiveness.
Source: OECD
