1 child
- Input
- 1 filho
- Expected output
- 15% a 20%
The range most commonly cited in forensic practice for a single child.
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what percentage is child support
Brazilian forensic practice tends to fall between 15% and 20% of income for one child, rising non-linearly with each additional child, because the paying parent has only one ability to pay, split across every dependent. This is not a legal table: it is only what courts tend to observe, and the final percentage for any actual case is always a judicial decision.
The range most commonly cited in forensic practice for a single child.
Non-linear growth: more than the 1-child range, but far from tripling.
No. The Civil Code (articles 1,694 and 1,695) only sets out the needs of the child versus the ability of the paying parent, with no percentage table. The 15% to 30%-or-more ranges that circulate online summarize what forensic practice tends to observe, not a rule written into law, the final percentage is always a judge's decision, case by case, based on proof of income and real expenses.
There is no fixed legal cap, but practice tends to informally cite that the total rarely exceeds half the paying parent's income, since going further would threaten their own subsistence. The estimator uses that practical cap as a reference when extrapolating ranges for high numbers of children.
The custody arrangement can reduce the final amount through a time-together adjustment, but it does not change the reference percentage range itself. The estimator applies that adjustment as a separate step, after computing the range from the number of children.
Brazilian law has no legal table fixing a child support percentage. The result below is an orientative range based on what forensic practice tends to observe, never "the amount owed". The real value is decided by a judge, case by case, based on the needs of the child versus the ability of the paying parent (Civil Code, articles 1,694 and 1,695).
The result of the selected calculation base, already with the custody adjustment applied. It is an estimate, not the amount a judge will necessarily set.
30% of gross vs. 30% of net: a difference of R$ 74,58 per month
Percentage range observed in forensic practice for 2 children: 20% to 30%
An illustrative range from forensic practice, not a legal table. Allocated across the children in this case when there are dependents from other relationships.
Range suggested by the balance: R$ 751,40 to R$ 751,40
Reference minimum wage: R$ 1.621,00 (Portaria Interministerial MPS/MF nº 13/2026)
Calculation Summary, Child Support Simulation ============================================= Gross monthly income: R$ 3.000,00 Net monthly income: R$ 2.751,40 30% of gross (R$ 900,00) vs. 30% of net (R$ 825,42): a difference of R$ 74,58 13th salary: R$ 0,00 Vacation pay + constitutional third: R$ 0,00 Deposited FGTS: - Habitual overtime: - Profit sharing (PLR): - Expanded base (income + included items): R$ 3.000,00 Total children of the paying parent (all relationships): 2 Suggested percentage range for this case: 20% to 30% Amount from the chosen calculation base: R$ 600,00 Final estimated amount: R$ 600,00 Total child expenses (balance panel): R$ 2.050,00 Estimated available ability of the paying parent (balance panel): R$ 751,40 Range suggested by the needs-versus-ability balance: R$ 751,40 to R$ 751,40 Legal basis: Civil Code, articles 1,694 and 1,695. There is no legal percentage table; the final amount depends on a case-by-case court decision. Simulation generated on 31/08/2026 by jkit.tools, orientative use only, does not replace legal analysis of the actual case.
Considering the needs of the child versus the ability of the paying parent (Civil Code, articles 1,694 and 1,695), it is requested that child support be set on behalf of 2 children, estimated in a range of 20% to 30% of the paying parent's Gross income income, which in this simulation corresponds to approximately R$ 600,00 per month, an amount subject to proof of income and expenses in the case record.
This estimator helps you arrive at a starting figure before any decision exists. If support has already been set (by agreement or court order) and installments are overdue, use the Support Arrears Calculator to work out the collection amount, with interest and monetary correction.
All the calculation runs in your browser. The data you enter (income, expenses, number of children) is never sent to any server or stored anywhere.