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Use this form to estimate your current taxable income for a child support assessment for 2020. This is from 1 April 2019 to 31 March 2020.

You must expect your income to be at least 15% less than the income used to work out your current child support assessment.

What happens next

If we accept your estimate, we'll reassess your child support and send you a new notice.

After the end of the tax year, we'll compare the income you estimated with what you actually earned. If necessary, we'll reassess your child support. 

If we cannot accept your estimate, we'll send you a letter explaining why.

My responsibilities

We may ask you for evidence to support your estimate.

You'll need to read the following guide to help you estimate your income.

Child support - estimating your income IR151 PDF 171KB Download form IR104 2021 Child Support Year PDF 111KB Download form

You can complete this form online before printing.

Sign the form and send it to us at:

Child support
PO Box 39010
Wellington Mail Centre
Lower Hutt 5045

Estimate of income for child support assessment, 2020 IR104 PDF 135KB Download form