How the estimate works
Parent’s share = total monthly costs × parent’s net income ÷ combined net income
The calculator adds up the children’s monthly costs, divides them in proportion to each parent’s net income and shows the share of the parent the children do not live with. If you enter what is currently paid, it shows the difference.
Important
This is an educational estimate, not a determination of a legally enforceable amount. Courts look at the full picture — including other dependants, special needs, each household’s costs and contact arrangements. Your figures are kept out of shareable links.
Worked example
Parents earning R25 000 and R35 000, child lives with parent 1
Parent 2 earns 58% of the combined income, so their estimated share of the R8 800 monthly costs is about R5 133. Parent 1 contributes their share mainly by providing the home and daily care.
Proportional shares
- Total monthly costs
- R8 800.00
- Combined net income
- R60 000.00
- Parent 1 share (41.7%)
- R3 666.67
- Parent 2 share (58.3%)
- R5 133.33
- Parent 1 contributes mainly by providing the home and day-to-day care
- R3 666.67
Frequently asked questions
How is child maintenance calculated in South Africa?
There is no fixed formula. Under the Maintenance Act, courts consider the child’s reasonable needs and both parents’ means and circumstances. A proportional split of the child’s costs according to income is a common starting point.
Do both parents have to pay maintenance?
Yes. Both parents have a duty to support their child according to their means, whether or not they were married. The parent the child lives with contributes through day-to-day care and costs.
How do I claim maintenance?
Apply at the maintenance court at your nearest magistrate’s court. It is free, and you do not need a lawyer. The court can also order the other parent to disclose their income.
What costs can be included?
Reasonable costs for the child, such as a share of housing, food, school fees, transport, medical costs, clothing and childcare. Keep receipts and a budget — courts look for evidence.