Calculate Child Support
Before taxes. Include wages, self-employment, bonuses.
Maryland uses the Income Shares — both incomes required.
0 = no custody · 91 = 25% · 182 = 50/50 · 365 = full custody
$0
estimated monthly support payment
⚠️ Estimate only. Actual court-ordered amounts may vary. Verify with a licensed Maryland family law attorney.
ℹ️ Maryland uses the Income Shares — Maryland uses Income Shares based on combined adjusted actual income.
How Child Support Works in Maryland
Maryland uses the Income Shares to determine child support obligations.
The Income Shares model combines both parents' incomes, finds the basic support obligation from a state schedule, then divides it proportionally. More parenting time (overnights) reduces the non-custodial parent's payment through a parenting time credit.
How Maryland Compares to Other States
See how Maryland's child support rules compare to other states.
| State | Formula | Support Ends | Arrears Rate | Mod. Threshold |
|---|---|---|---|---|
| ★ Maryland (you) | Income Shares | 18 | 10% | 25% |
| Delaware | Melson Formula | 18 | 5% | 10% |
| Idaho | Percentage of Income | 18 | 5% | 15% |
| Michigan | Income Shares | 18 | 5% | 10% |
| Ohio | Income Shares | 18 | 5% | 10% |
| Alaska | Percentage of Income | 18 | 6% | 15% |
| Florida | Income Shares | 18 | 6% | 15% |
| Louisiana | Income Shares | 18 | 6% | 25% |
| New Hampshire | Income Shares | 18 | 6% | 15% |
Showing 8 comparison states. View all 50 states →
Frequently Asked Questions
How is child support calculated in Maryland?
Maryland uses the Income Shares model. Maryland uses Income Shares based on combined adjusted actual income.
When does child support end in Maryland?
Child support generally ends when the child turns 18 in Maryland.
Can I modify child support in Maryland?
Yes. Maryland requires a 25% or greater change in income to qualify. Use our modification checker →
Does 50/50 custody eliminate child support in Maryland?
Not automatically. The higher-earning parent typically still pays support with 50/50 custody. See our 50/50 guide →
What income is used for child support in Maryland?
Income includes wages, self-employment, bonuses, rental income, unemployment benefits, disability payments, and Social Security. Courts may impute income if a parent is voluntarily underemployed.