CSA Calculator NI

Child maintenance in Northern Ireland is governed by separate devolved legislation: the Child Support (Northern Ireland) Order 1991. While the mathematical calculation formula parallels the 2012 scheme in Great Britain, administration is managed independently by the Child Maintenance Service Northern Ireland (CMS NI), an operational agency of the Department for Communities (DfC) based in Belfast.

Northern Ireland maintains distinct institutional structures, including local dispute resolution teams and direct integration with Northern Ireland Magistrates' Courts for enforcement orders.

CMS NI determines child maintenance using gross weekly taxable income verified directly through HMRC. The statutory income bands mirror Great Britain: Nil rate (under £7/wk), Flat rate (£7/wk for benefit recipients), Reduced rate (£100–£200/wk), Basic rate (£200–£800/wk: 12% for 1, 16% for 2, 19% for 3+ children), and Basic Plus (over £800/wk: 9%, 12%, 15% up to £3,000/wk).

The statutory application fee of £20 is waived for all Northern Ireland applicants, making CMS NI claim setup completely free for all parents resident in the province.

Where paying parents default, CMS NI enforces arrears through the Northern Ireland Magistrates' Courts and the Enforcement of Judgments Office (EJO). The Department for Communities possesses statutory powers to issue Attachment of Earnings Orders directly to Northern Ireland employers.

If arrears persist, CMS NI can secure liability orders through the local Magistrates' Court, apply for distress warrants, register charges against property in the Land Registry of Northern Ireland, and petition for driving licence disqualification.