How much child support you pay depends on:

• what both parents earn
• the cost of raising a child, and
• whether you have other children
• how much care you provide for the child.

Child support

When you pay child support

You have to pay child support to Inland Revenue if you’re on a benefit and you have a child who lives with you less than two thirds of the time and is:

• under 18, or 18 and attending a registered school in NZ or overseas
• an NZ citizen or ordinarily resident here
• not married or in a civil union or de facto relationship, and
• financially dependent — not working more than 30 hours a week on average or receiving a benefit or student allowance.

If neither you or the caregiver receives a sole parent or unsupported child’s benefit, you can make a private agreement.

Work out what you might pay or receive

Payments stop when your child turns 18 (unless they’re still at school), or if they:

• stop living with the receiving carer
• work full time (30 hours a week or more)
• receive a benefit or student allowance
• live in a de facto relationship, or
• get married.

Your child support assessment

Private and voluntary agreements

If neither you or the caregiver receives a sole parent or unsupported child’s benefit, you can make a private agreement and IR doesn’t have to be involved.

If you want IR involved, or if the main caregiver receives a sole parent or unsupported child’s benefit, you’ll need to contact IR before registering any agreement.

If the child’s caregiver gets a benefit and you agree to pay more than the IR assessment, the caregiver will only directly receive the amount you pay over the assessed payment. The rest will go towards their benefit.

Calculating your child support

Work out how much you should get or how much you have to pay.

IR child support calculator