Child Support Calculator for U.S. States and Territories

Who is the Non-Custodial Parent (Who Pays Support)?

Parent A

Parent B

Parent A Gross Monthly Income ($)

Parent B Gross Monthly Income ($)

Number of Children

Monthly Childcare Cost ($)

Monthly Child Health Insurance ($)

Extraordinary Medical Expenses ($)

Custody Arrangement (MD)

Non-Primary Parent Overnights/Year

Shared custody requires at least 92 overnights a year.

Other children in Parent A's home (not in this order)

Allowance applies only if that child spends more than 92 overnights in the home. Deduction is 75 percent of the schedule amount based on that parent's income alone (HB 275, effective Oct 1, 2025).

Other children in Parent B's home (not in this order)

The same rule applies to Parent B. This is an educational estimate only and is not legal advice.

Parent B's Overnights / Year

Joint custody formula applies for > 110 overnights.

Parent B's Overnights / Year

Shared custody adjustment applies for > 92 overnights (25%).

Parent B's Overnights / Year

Shared placement requires ≥ 92 overnights.

Time with Higher Earner (%)

Enter the percentage of time children spend with the higher-earning parent.

Tax Filing Status (Higher Earner)

Parent B's Overnights / Year

A parenting time adjustment applies for > 110 overnights.

Parent B's Overnights / Year

Extended shared parenting adjustment applies for > 127 overnights.

Parent B's Overnights / Year

Shared custody calculation applies for > 109 overnights.

Parent B's Overnights / Year

Extensive Time-Sharing calculation applies for > 142 overnights.

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This calculator gives an estimate only and is not legal advice. We are not affiliated with any government agency or court.

Important Disclaimer