http://www.legislation.gov.uk/ukpga/2015/35National Insurance Contributions (Rate Ceilings) Act 2015An Act to set a ceiling on the main and additional primary percentages, the secondary percentage and the upper earnings limit in relation to Class 1 national insurance contributions.texttext/xmlenStatute Law Database2016-03-172015-12-17 2015 c. 35An Act to set a ceiling on the main and additional primary percentages, the secondary percentage and the upper earnings limit in relation to Class 1 national insurance contributions.[17th December 2015]Be it enacted by the Queen's most Excellent Majesty, by and with the advice and consent of the Lords Spiritual and Temporal, and Commons, in this present Parliament assembled, and by the authority of the same, as follows:—11In relation to primary Class 1 contributions payable in respect of any period in a tax year to which this section applies—athe main primary percentage shall not exceed 12%, andbthe additional primary percentage shall not exceed 2%.2This section applies to a tax year which begins after the day on which this Act comes into force but before the date of the first parliamentary general election after that day.3In this section, “main primary percentage” and “additional primary percentage” are to be construed in accordance with section 8(2)(a) and (b) of SSCBA 1992 and SSCB(NI)A 1992.21In relation to secondary Class 1 contributions payable in respect of any period in a tax year to which this section applies, the secondary percentage shall not exceed 13.8%.2This section applies to a tax year which begins after the day on which this Act comes into force but before the date of the first parliamentary general election after that day.3In this section, “secondary percentage” is to be construed in accordance with section 9(2) of SSCBA 1992 and SSCB(NI)A 1992.31The upper earnings limit specified in regulations under section 5(1) of SSCBA 1992 and SSCB(NI)A 1992 for any tax year to which this section applies shall not exceed the weekly equivalent of the proposed higher rate threshold for that tax year.2This section applies to a tax year—awhich begins after the day on which this Act comes into force but before the date of the first parliamentary general election after that day, andbfor which income tax is charged.3For the purposes of this section, the “proposed higher rate threshold” for a tax year is the sum of—athe basic rate limit for income tax for the tax year as proposed in the pre-budget proposals for that year, andbthe personal allowance for income tax for the tax year as so proposed.4For the purposes of this section, the weekly equivalent of a proposed higher rate threshold for a tax year is the amount produced by dividing that threshold by 52 and rounding up or down to the nearest pound.5In this section “pre-budget proposals” means the government's pre-budget fiscal proposals for a tax year which are contained in a document presented to Parliament by the Chancellor of the Exchequer by Command of Her Majesty.4In this Act—“SSCBA 1992” means the Social Security Contributions and Benefits Act 1992;“SSCB(NI)A 1992” means the Social Security Contributions and Benefits (Northern Ireland) Act 1992.51This Act extends to England and Wales, Scotland and Northern Ireland.2This Act comes into force on the day on which it is passed.3This Act may be cited as the National Insurance Contributions (Rate Ceilings) Act 2015.