Getting started

  • Getting started
  • Children's details
  • Parents / carers details
  • Nights of care
  • Your results

What you need to know

The calculation in 'Your results' page is based on the information you provide and is a guide only.

Using the calculator does not result in data being saved by Inland Revenue.

What this service can provide

If you are a parent, use this tool to calculate the amount of child support you MAY pay or receive. You can:

  • enter up to two child support groups you are part of;
  • enter up to four qualifying children for each child support group;
  • request a calculation when your qualifying child/ren are in the care of a non-parent carer (e.g. a grandparent).

Note: if any of the other parents have children in other child support groups this calculator cannot take those children into account.

If you are a non-parent carer (e.g. a grandparent), use this tool to calculate the amount of child support you MAY receive. You can:

  • enter up to two child support groups;
  • enter up to four qualifying children in your care for each child support group;
  • request a calculation for a child/ren from only one parent.

Note: if any of the parents have children that you do not care for in other child support groups, this calculator cannot take those children into account.

What this service can't provide

A calculation when:

  • there is an administrative review, court order, or other child support arrangement in place administered by IR (e.g. a voluntary agreement).

Required field (*)

Getting started

Why enter your name?

Your name is used to personalise your results page.

Who is a non-parent carer?

A non-parent carer is someone who is not the parent and cares for a child at least 35% of the time (about 5 nights per fortnight) e.g. a grandparent.

If you are both a parent and a non-parent carer, you must do two separate calculations. For example, if you are a parent, select parent to estimate your qualifying children child support. If you look after your niece, select non-parent carer to work out her child support.