How is child support worked out in New Zealand?

Common question · Family Law · New Zealand · 23 October 2026

General information from Lawmateanz

In New Zealand, child support is usually worked out by Inland Revenue using a set formula. Parents can also make their own private arrangement instead.

The formula takes into account both parents' incomes, how many nights each parent cares for the child, the number and ages of the children, and the cost of raising children. Shared care can reduce or change what's payable.

Either parent can apply. If you're receiving a sole-parent benefit, you may be required to apply through Inland Revenue.

If the formula doesn't reflect your situation, for example because of special costs or a big change in income, you can ask Inland Revenue for an administrative review. Decisions can also be challenged, and in some cases the Family Court can make a departure order.

Inland Revenue's child support calculator gives an estimate, and Community Law Centres can help with disputes.

Written by Lawmateanz, not by a lawyer. General information only, not legal advice about your situation. For advice about your own matter, talk to a lawyer.

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