Maryland's child support formula starts with both parents' income

Maryland does not have a fixed dollar amount for one child. Instead, the court uses a formula based on how much each parent earns. The formula takes the combined income of both parents, applies a percentage to it, and then divides the obligation between them based on their share of that income.

The percentage itself depends on how many children are involved. For one child, Maryland law sets the percentage at 20% of combined adjusted gross income. This means if both parents together earn $60,000 per year, the total child support obligation is $12,000 per year, or $1,000 per month. The parent without primary custody (usually called the "obligor") pays their share of that $12,000 based on their portion of the combined income.

Income includes wages, salary, self-employment earnings, rental income, and certain benefits. It does not automatically include child support or spousal support the parent receives from someone else, though the court can consider other factors.

Key Takeaways

  • Maryland uses 20% of combined adjusted gross income as the base for one child, divided between parents by their income share.
  • The actual payment amount depends entirely on both parents' earnings, so two families with one child will have different obligations.
  • The court can adjust the standard amount if it would cause hardship, if either parent has other children to support, or if the parents have shared custody.
  • Child support continues until the child turns 18, or until 19 if still in high school, unless the court orders otherwise.
  • The obligor parent pays the obligee parent (or the state if the obligee receives TANF), not the child directly.

How the court calculates your specific amount

The calculation starts with "adjusted gross income," which is not the same as what appears on a tax return. Maryland adds back certain deductions: it includes income the parent claims as a business loss, adds back certain tax deductions, and includes income from assets. It subtracts actual child support or spousal support the parent pays to someone else, and subtracts certain work-related expenses.

Once both parents' adjusted gross incomes are established, the court adds them together. It then multiplies that combined figure by 0.20 (the 20% for one child). That product is the total monthly or annual obligation. The court then divides it between the parents based on their percentage of the combined income.

Example: Parent A earns $50,000 per year; Parent B earns $30,000 per year. Combined income is $80,000. Twenty percent of $80,000 is $16,000 per year, or about $1,333 per month. Parent A's share of combined income is 62.5% ($50,000 ÷ $80,000), so Parent A's obligation is $833 per month. Parent B's share is 37.5%, so Parent B's obligation is $500 per month. If Parent A has primary custody, Parent B pays $833 per month to Parent A.

When the court can order more or less than the standard amount

Maryland law allows the court to deviate from the 20% formula if applying it would be unjust or inappropriate. The court must state its reasons in writing if it does. Common reasons for deviation include: one parent's income is extremely high or low, the parents have shared or split custody, one parent has other children from other relationships to support, the child has special needs, or either parent has significant assets beyond income.

A parent can also request a deviation if the standard amount would cause substantial hardship — for example, if the obligor parent has very limited income and also supports other dependents. The court will not reduce support simply because the obligor remarries or has a new child, but it will consider whether the obligor is actually supporting that new child.

If the parents agree on an amount in writing, the court will usually approve it as long as it is not so low that it appears the obligee parent was coerced or did not understand the agreement.

Income limits and high-income cases

Maryland's guidelines apply to combined parental income up to a certain threshold. That threshold changes yearly and is set by the state. Once combined income exceeds the threshold, the court has discretion to apply the 20% formula to the income above the cap, apply a lower percentage, or order a different amount based on the factors listed in the statute.

This means a family where both parents earn $500,000 per year will not necessarily pay 20% of $500,000 in child support. The court will look at the child's actual needs, the standard of living the child would have enjoyed if the parents had remained together, and each parent's ability to pay.

How long child support lasts

Child support in Maryland continues until the child turns 18. If the child is still enrolled in high school at age 18, support continues until the child graduates or turns 19, whichever comes first. Support ends immediately if the child marries, joins the military, or becomes emancipated before that age.

The obligor parent does not have to pay support for a child who is incarcerated, and support may be modified or terminated if the child moves in with the obligor parent full-time.

Who receives the payment and how it is enforced

Child support is paid to the obligee parent (the parent with primary custody) or, if the obligee receives TANF or other public assistance, to the Maryland Department of Human Services. Payments are typically made through the state's Central Collection Unit, which tracks payments and distributes them. This creates an official record of payment.

If the obligor parent falls behind, the state can enforce collection through wage garnishment, tax refund intercept, driver's license suspension, and contempt of court proceedings. The obligor parent can request a modification if circumstances change significantly — a job loss, a substantial decrease in income, or a change in custody.

Modifying child support after the order is issued

Either parent can ask the court to change the amount if there has been a material change in circumstances. A material change usually means a change in income of 25% or more, a change in custody, or a change in the number of children being supported. A parent who loses a job, gets a significant raise, or experiences a major health event can petition for modification.

The court will recalculate using current income and apply the same 20% formula. If the new amount differs from the old amount by $50 or more per month, the court will usually grant the modification. The new amount typically takes effect on the date the petition is filed, not the date the order is signed.

Frequently Asked Questions

Does Maryland have a minimum child support amount?

Maryland does not set a flat minimum, but the court will not order less than $50 per month unless the obligor parent has almost no income or the court finds deviation is appropriate. Even parents with very low income are expected to contribute something.

What if one parent is self-employed or has irregular income?

The court will average the self-employed parent's income over the past two to three years, or use tax returns and business records to establish a reliable figure. If income is genuinely unpredictable, the court may order a base amount plus a percentage of income above a certain threshold.

Can child support be waived if the parents agree?

Parents cannot completely waive child support in Maryland — the child has a right to support from both parents that the parents cannot sign away. However, parents can agree to an amount lower than the guideline amount, and the court will approve it if both parents understand what they are agreeing to and it is not unreasonably low.

Does the obligor parent get a tax deduction for child support?

No. Child support is not deductible by the obligor parent and is not taxable income to the obligee parent. This is different from spousal support (alimony), which has different tax treatment.

What happens if the obligor parent's income drops significantly?

The obligor parent can file a petition to modify the order. The court will recalculate based on current income. If the income drop is temporary (a brief layoff), the court may not modify immediately, but if it is permanent or long-term, modification is usually granted. The obligor parent should file the petition promptly rather than simply stop paying.