The Child Support(Northern Ireland) Order 1991

2.—(1) In order to determine the amount of any maintenance assessment, first calculate—

where—

• A is the absent parent’s assessable income;

• C is the assessable income of the other parent, where that parent is the person with care, and otherwise has such value (if any) as may be prescribed; and

• P is such number greater than zero but less than 1 as may be prescribed.

(2) Where the result of the calculation made under sub-paragraph (1) is an amount which is equal to, or less than, the amount of the maintenance requirement for the qualifying child or qualifying children, the amount of maintenance payable by the absent parent for that child or those children shall be an amount equal to—

A × P

where

• A and P have the same values as in the calculation made under sub-paragraph (1).

(3) Where the result of the calculation made under sub-paragraph (1) is an amount which exceeds the amount of the maintenance requirement for the qualifying child or qualifying children, the amount of maintenance payable by the absent parent for that child or those children shall consist of—

(a) a basic element calculated in accordance with the provisions of paragraph 3; and

(b) an additional element calculated in accordance with the provisions of paragraph 4.