How Louisiana Child Support Is Actually Calculated, and Why the Number Surprises Almost Everyone
Two things surprise people about child support in Louisiana. The first is how mechanical it is. The second is how much room there still is to fight, once you understand where the fight actually lives.
Louisiana uses guidelines set out in La. R.S. 9:315 and the sections that follow. The court determines each parent’s monthly gross income, makes certain adjustments, adds the two figures together, and reads a basic support obligation off a schedule in the statute. That obligation is then divided between the parents in proportion to their share of the combined income, with additions for specific expenses.
The formula is not where cases are won or lost. The inputs are.
The inputs people fight about
Income. Gross income is broad. It is not just salary. It includes self-employment income after ordinary business expenses, bonuses, commissions, rental income, and other recurring sources. Self-employed parents, contractors, and business owners are where these cases get difficult, because business deductions that are legitimate for tax purposes are not always deductions for support purposes. Getting the true number takes discovery: returns, bank records, profit and loss statements.
Voluntary underemployment. If a parent quits a good job, takes a lower paying one, or works part time without good reason, the court can calculate support based on earning potential rather than actual earnings. This is one of the most contested issues in the entire area, and it is proven with work history, qualifications, and evidence of what jobs are available.
Existing obligations. Preexisting child support orders and spousal support actually being paid come off the top.
Health insurance and child care. The cost of the child’s health insurance premium and reasonable child care costs necessary for a parent to work get added into the calculation and shared.
Extraordinary expenses. Private school tuition, expenses for a child with particular educational or medical needs, and certain transportation costs can be added, though these are often discretionary and are argued.
Shared custody changes the math
Louisiana uses different worksheets depending on the custody arrangement. Where one parent has primary physical custody, one worksheet applies. Where custody is genuinely shared, meaning each parent has physical custody of the child for a substantial and roughly equal share of the time, a different worksheet applies and the resulting number can look very different.
This is why custody schedules and support are not separable questions. A change in the physical schedule can change the support obligation, and parents sometimes negotiate a schedule without realizing they have just negotiated the money too.
Deviation
A court can order an amount other than the guideline figure, but it has to give reasons on the record, and the burden is on the party asking. Courts deviate for things like the extraordinary medical needs of a parent or child, unusual travel costs for custody exchanges, or circumstances where the guideline result would be plainly unjust. Deviation is available. It is not easy, and it is not granted because a parent finds the number inconvenient.
Changing an order that no longer fits
An existing order can be modified when there has been a material change in circumstances since it was rendered. A layoff, a serious raise, a change in the custody schedule, a child’s new medical need. What does not work is waiting.
This is the mistake we see most often, and it is expensive. A parent loses a job in March, cannot pay, and simply stops paying. He files nothing. In November, he is in court on a rule for contempt facing an arrearage he has no way to satisfy, and past due support is generally not retroactively reduced. Had he filed a motion to modify in March, the exposure would have been a fraction of that.
If your income drops, file. Immediately. The filing date is what protects you.
Enforcement
Unpaid support is collected through income assignment orders, interception of tax refunds, license suspension, liens, and contempt proceedings that can carry jail time. Louisiana’s Department of Children and Family Services handles enforcement in many cases, and its process is slow and rigid. Parents on either side of an enforcement action are usually better served by their own filing in district court than by waiting for an agency queue.
Where we come in
Most child support disputes in East Baton Rouge Parish are really disputes about income, custody time, or both, and both are proven with records. We handle establishment, modification, and enforcement, and we handle the custody side of the case at the same time, because in practice they are one case.
Call 225-341-6945 to talk about your order, whether you are paying it or trying to collect it.








