Child support covers a child’s share of everyday living costs, calculated through a state formula tied to parental income, with healthcare, work-related childcare, and sometimes education costs added on top. Understanding what expenses are included in child support means separating two things: the base amount set by the guideline formula, which absorbs routine daily costs, and the add-on expenses the order treats separately because they vary too much from family to family to roll into one number.
What the Base Amount Covers
The guideline figure is designed to handle a child’s proportional share of routine household spending. Forty-one states use an income shares model that bases the number on both parents’ combined earnings. Six states use a percentage-of-income model that looks only at the noncustodial parent’s income, on the assumption that the custodial parent is already contributing through daily care and housing.1National Conference of State Legislatures. Child Support Guideline Models Either way, the formula produces a single monthly amount meant to absorb these day-to-day costs:
- Housing: the child’s portion of rent or mortgage payments, property taxes, and basic maintenance
- Utilities: electricity, water, heating, and similar household services
- Food: groceries and everyday meals
- Clothing: age-appropriate and seasonally appropriate clothing
- Transportation: gas, vehicle upkeep, and insurance tied to transporting the child to school, appointments, and activities
Because these costs are baked into the formula, neither parent submits receipts or justifies individual purchases. The amount reflects what an average family at that income level would spend on a child, adjusted for the number of children and, in income-shares states, for how much time each parent spends with the child.2Administration for Children and Families. How Is the Amount of My Child Support Order Set?
Small school-related expenses tend to live inside this base amount too. Supplies, field trip fees, and yearbooks are considered routine and don’t trigger a separate reimbursement.
Medical and Healthcare Costs
Healthcare sits outside the base because medical costs swing so widely between families. A support order usually splits it into premiums and out-of-pocket expenses.
Health Insurance Premiums
Courts routinely order one parent to carry health insurance for the child when coverage is available at a reasonable cost. Under federal regulations, “reasonable” generally means the child’s coverage doesn’t exceed 5% of that parent’s gross income, though states can set their own threshold. Only the added cost of covering the child counts. If a family plan runs $600 a month and a single plan costs $400, the $200 difference is what gets built into the support calculation.
Out-of-Pocket Costs
Co-pays, deductibles, prescriptions, glasses, and dental work that insurance doesn’t fully cover are the second piece. Many states fold a small allowance for routine out-of-pocket costs into the base amount, with $250 per child per year being the most common threshold. Below that line, the custodial parent handles it from the regular support payment. Above it, parents split the costs separately, usually in proportion to their incomes.
Bigger medical needs like braces, therapy, or surgery fall into the “extraordinary” category. These are almost always shared rather than absorbed by the base amount. A well-drafted order spells out the process: whether one parent needs the other’s approval before incurring the expense, how quickly reimbursement is due, and what documentation is required. If your order is silent on these details, address it with the court before a large bill arrives, not after.
One practical note. If either parent has access to a Health Care Flexible Spending Account through work, those pre-tax dollars can cover eligible child medical expenses. The IRS allows FSA funds to be used for a qualifying dependent’s healthcare costs.3FSAFEDS. Eligible Health Care FSA (HC FSA) Expenses Coordinating FSA use between parents can reduce the effective out-of-pocket burden, though only the account holder can submit claims.
Childcare and Education
Work-Related Childcare
Daycare, after-school programs, and summer care that a parent needs in order to work or attend school are treated as a mandatory add-on in most states. The net cost of childcare, after any tax credits or employer subsidies, gets added to the base support amount and split between parents. This is often one of the largest add-on expenses, sometimes rivaling the base support amount itself for families with young children.
Private School and Tutoring
Private school tuition and specialized tutoring are not automatically included. A court may order it if the child was already enrolled in private school before the separation, or if the child has documented needs a public school cannot meet. Short of that, both parents have to agree before either is on the hook.
College
Whether a support order can extend to college costs depends entirely on the state. Roughly a dozen states give courts the authority to order a parent to contribute to a child’s college tuition, room and board, or related expenses. The rest do not, so any contribution to higher education in those states has to come from a voluntary agreement. Even where it’s allowed, courts typically weigh the child’s academic performance, the parents’ financial capacity, and whether the child made reasonable efforts to secure financial aid before ordering a contribution.
Extracurricular and Discretionary Expenses
Sports leagues, music lessons, summer camps, and travel enrich a child’s life but aren’t treated as necessities. These costs are not part of the base support calculation, and courts won’t add them to an order unless the parents agree or the family has an established pattern of paying for them.
When parents do agree to share extracurricular costs, build in some guardrails. Set an annual spending cap that requires mutual approval before either parent commits to a new activity, or agree to split costs proportionally up to a fixed dollar amount per season. The parent who signs the enrollment contract is on the hook for the full amount as far as the program is concerned, so reaching agreement before signing matters more than sorting it out afterward.
How Add-On Expenses Get Split
When a court orders parents to share costs beyond the base amount, the standard approach is a pro-rata split based on each parent’s share of their combined income. If one parent earns $7,000 a month and the other earns $3,000, their combined income is $10,000. The higher earner is responsible for 70% of every shared add-on, and the lower earner covers 30%.
Applied to a $1,200 monthly childcare bill, the higher earner pays $840 and the lower earner pays $360. The same ratio applies to shared medical bills, private school tuition, or anything else the order designates as a joint expense.
Most orders require the parent who incurred the expense to provide documentation, a receipt, bill, or explanation of benefits, within a set number of days, and the other parent then reimburses their share within another set period. When those timelines slip, disagreements pile up quickly. Keeping organized records of every shared expense and reimbursement is one of the simplest ways to avoid a trip back to court.
Tax Treatment
Child support payments are not deductible for the parent who pays them, and they are not taxable income for the parent who receives them.4Internal Revenue Service. Alimony, Child Support, Court Awards, Damages 1 Neither parent reports child support on their federal tax return. The IRS treats it as a personal expense of the paying parent, not a transfer of income, which also means the payments don’t affect either parent’s adjusted gross income for benefits like the Earned Income Tax Credit.
Only one parent can claim the child as a dependent in a given year. The custodial parent gets that claim by default, though parents can agree, using IRS Form 8332, to let the noncustodial parent claim the child instead.