The Finance Act 2015 is an Act of the Parliament of the United Kingdom enacting the 2015 United Kingdom budget. The Chancellor of the Exchequer delivers the annual budget speech outlining changes in spending, tax, duty and other financial matters. The respective year's Finance Act is the mechanism to enact the changes. Levels of excise duties, value-added tax, income tax, corporation tax and capital gains tax) are often modified.

The rules governing the various taxation methods are contained within the relevant taxation acts. (For instance, capital gains tax legislation is contained within Taxation of Chargeable Gains Act 1992). The Finance Act details amendments to be made to each one of these Acts.

The bill for consideration was called 'Finance (No.2) Bill 2015', although it passed into law as 'Finance Act 2015'.^{[citation needed]}