A child support calculator in South Africa is a tool that gives you a rough estimate of the monthly amount a maintenance court is likely to order for a child. The calculator uses the parent’s income, the child’s needs, and the standard of living the child would have enjoyed if the family had stayed together, and produces an indicative figure. The actual order is always set by the magistrate after a hearing, and the calculator is a starting point, not a final number.
This page explains how a child support calculator works, what it can and cannot tell you, and how to use the figure to start a conversation. If you need help taking the next step, our Sandton-based Family Law team can assist.

What a child support calculator does
A child support calculator takes a few inputs and produces an indicative monthly amount. The inputs are the parent’s income, the child’s needs, and the cost of the expenses that the order is meant to cover. The output is a single figure, usually a rand amount, that gives you a sense of what the court might order.
Calculators are not a substitute for a maintenance order. The court has the discretion to set the order at any amount, and the calculator is calibrated to average cases. Your matter may be different, and the calculator may not capture the specific facts that matter for your matter.
Estimate a fair maintenance contribution
Courts divide a child’s needs between parents in proportion to their means. Enter monthly rand figures to see how that split typically works.
Needs include the child’s share of housing and utilities, food, school fees, transport, clothing, medical aid and care costs. The Maintenance Act 99 of 1998 guides what counts.
This is an indicative estimate only. A maintenance officer or court decides the final amount after looking at full disclosure of both parents’ finances, and either parent’s reasonable living expenses can adjust the split. Use this figure to prepare, not to settle.
What the calculator does not do
A calculator does not give you a legally binding figure. It does not capture the discretionary factors that the magistrate weighs at the enquiry, and it does not replace legal advice. The output is a starting point for a conversation, not a final number.
Calculators also do not handle variations, default orders, or section 31 criminal charges. Each of these has its own procedure, and the calculator is not the right tool for any of them.
How to use a calculator
The calculator has three inputs. The first is the parent’s gross monthly income. The second is the child’s monthly expenses, including food, clothing, school fees, and medical aid. The third is the standard of living the child would have enjoyed if the family had stayed together.
Once you have the inputs, the calculator produces a single figure. Treat the figure as a starting point, not a final number. The court’s order will depend on the actual facts of the matter, and the order may be higher or lower than the calculator’s output.
Limitations of the calculator
Calculators are not perfect. The most common limitations are listed below in the order they usually appear in practice.
- Calculators do not capture the discretionary factors that the magistrate weighs. The court has the discretion to set the order at any amount, and the calculator is calibrated to average cases.
- Calculators do not handle the parents’ other obligations. The court takes the parents’ other children and dependents into account, and the calculator may not.
- Calculators do not handle the change in circumstances. The order is reviewed on a variation application, and the calculator is not the right tool for that.
- Calculators do not handle the criminal side. Section 31 criminal charges are a separate track, and the calculator is not the right tool for those.
What to do with the calculator’s figure
The calculator’s figure is a starting point, not a final number. The right next step depends on the kind of help you need. The list below gives the typical next steps for the most common situations.
- If you want to apply for an order, take the figure to the maintenance court in your district and complete the application form.
- If you want to vary an existing order, take the figure to a family attorney and discuss the variation application.
- If you want to defend a section 31 criminal charge, take the figure to a family attorney and discuss the criminal defence.
- If you want to negotiate an agreement, take the figure to the other parent and use it as a starting point for the conversation.
Other tools that help with the calculation
A calculator is not the only tool that helps with the calculation. The list below gives the other tools that are commonly used in the maintenance enquiry, and the role each one plays.
- A budget template, which helps you list the child’s expenses in a structured way.
- A payslip template, which helps you evidence the parent’s income.
- A bank statement template, which helps you evidence the parent’s outgoings.
- A maintenance order template, which helps you draft the order for the magistrate’s review.
Common Mistakes to Avoid
These are the patterns that lead parents to a wrong figure.
- Using the calculator as a final number. The calculator is a starting point, not a final number.
- Ignoring the parents’ other obligations. The court takes the parents’ other children and dependents into account.
- Forgetting to update the calculator’s inputs. The figures in the calculator should be the current figures, not historical.
- Skipping the supporting documents. The court will not make an order on the calculator’s output alone.
- Letting the calculator’s figure become the talking point. The conversation should be about the child’s needs, not the calculator’s output.
Frequently Asked Questions
How do I use a child support calculator in South Africa?
Provide the parent’s gross monthly income, the child’s monthly expenses, and the standard of living the child would have enjoyed if the family had stayed together. The calculator produces a single indicative figure, which you can use as a starting point for the conversation with the other parent or for the maintenance application.
Is a child support calculator accurate in South Africa?
Calculators are calibrated to average cases. They give you a rough estimate, not a final number. The actual order is set by the magistrate after a hearing, and the order may be higher or lower than the calculator’s output.
Can a child support calculator be used in court?
The calculator’s output is not a binding figure and is not usually admitted into evidence. The court will rely on the actual documents, including payslips, bank statements, and the child’s expense list, to set the order.
What inputs does a child support calculator need?
The calculator needs the parent’s gross monthly income, the child’s monthly expenses, and the standard of living the child would have enjoyed if the family had stayed together. Some calculators also ask for the parents’ other obligations, including other children and dependents.
Are child support calculators free in South Africa?
Most online calculators are free to use. The calculators produced by attorneys and family law firms are usually free, and they are calibrated to the local court practice. The figures are indicative, not legal advice.
How often does child maintenance change in South Africa?
Child maintenance does not change automatically. Either parent can apply to the maintenance court to vary the order on a material change in circumstances. The court will recalculate the order based on the new facts.
What happens if the calculator’s figure is different from the court order?
The court order is the final number. The calculator is a starting point, and the actual order may differ from the calculator’s output. The parents are bound by the order, not by the calculator’s figure.
Get help with the next step. If you have used a calculator and want to take the next step, Otrebski Attorneys’ Family Law team in Sandton can assist with the maintenance application, the variation, or the section 31 defence. As a 100% women-led firm with a 5-star Google rating, we focus on compassionate, practical legal solutions for families.
Disclaimer. This article provides general information about child support calculators in South Africa. It is not legal advice and does not replace consultation with a qualified family attorney. The relevant law is set out in the Maintenance Act 99 of 1998 and the Children’s Act 38 of 2005, both of which may be amended. Confirm the current position with the Department of Justice and Constitutional Development or speak to a family attorney before relying on anything in this article.
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