Child Support in Maryland: How Much Will You Owe?

Quick answer: it depends on both parents' incomes, how many children you have, and the parenting schedule. The calculator on this page turns those numbers into a real guideline estimate in about a minute. It is an educational estimate, not legal advice, and the judge always sets the final amount. FamilyCourtHelp.com is a self-help resource, not a law firm.

Wondering how much child support you will owe or receive in Maryland? The state uses one formula everywhere, so the same math applies in every county. This page explains how it works, lets you run a live estimate, and links to a dedicated page for each county at the bottom.

Maryland follows the Income Shares model under Maryland Family Law §§ 12-201 to 12-204. The court combines both parents' monthly gross incomes, looks up the basic support obligation on the state's guideline schedule for that income level and number of children, then prorates the obligation between the parents according to each parent's percentage share of the combined income.

What counts as income? Maryland runs the formula on gross income, meaning income before taxes come out. Actual monthly gross income from any source, salary, wages, commissions, self-employment net earnings, severance, pensions, dividends, interest, rental income, Social Security, workers' comp, unemployment, alimony received, and capital gains.

Parenting time matters directly in Maryland: the number of overnights each parent has changes the math itself. Maryland uses a shared physical custody formula when each parent has the child for at least 92 overnights per year. Once you cross that overnight threshold, the calculation shifts to account for both households' direct spending on the child, which usually lowers the higher earner's payment. Below that level, the basic guideline obligation applies and the noncustodial parent typically pays a straight share. This on-page tool only estimates the result, so confirm your overnight count against the official Maryland worksheet.

When does it end? Maryland child support typically ends at age 18 but extends to age 19 if the child is still a full-time secondary school student. Continuing support for disabled adult children is available.

Can the amount change later? File a motion to modify in circuit court or request review through CSA. A 25% variance or material change of circumstances supports modification.

If payments fall behind, Maryland has real enforcement tools. Maryland CSA uses immediate income withholding, tax intercept, license suspension, credit reporting, lien filings, passport denial, and contempt referrals.

Child support cases in Maryland are generally handled through the state's Circuit Court, and Maryland Child Support Administration (Department of Human Services) runs the state's child support services program. Forms and local practice can vary, so confirm the current details with your local court or the agency.

The calculator on this page is the same live engine behind our full Child Support Calculator. Enter both incomes, the number of children, and the overnight split, and the estimate updates instantly. The full calculator page adds extras like health insurance, child care costs, and saved scenarios.

Bottom line for Maryland: the guideline number comes from incomes, children, and parenting time. Run the estimate on this page, keep your paperwork honest and complete, and let the court confirm the final amount.

Frequently asked questions

How much child support will I owe in Maryland?

There is no flat amount. Maryland uses the Income Shares model under Md. Code, Family Law §§ 12-201 to 12-204, so the number depends on both parents' incomes, the number of children, and the parenting schedule. The calculator on this page gives you a guideline estimate, and the court sets the final amount.

When does child support end in Maryland?

Age 18, or up to age 19 if the child is still a full-time secondary school student.

Can the child support amount be changed later in Maryland?

Usually yes, when circumstances change enough. A 25% variance between the existing order and a new guideline calculation, or a material change of circumstances.

Who handles child support cases in Maryland?

Cases are generally heard in the state's Circuit Court, and Maryland Child Support Administration (Department of Human Services) handles services like locating parents, establishing orders, and collecting payments.