Massachusetts Child Support Guidelines

Massachusetts operates under the Income Shares model, one of 42 U.S. states using this framework. For a parent supporting one child, the base guideline applies roughly 20% of income, scaling to 28% for two children and 35% for three. That places Massachusetts at rank #4 of 51 states by single-child base percentage. Unlike capped states, there is no statutory income ceiling — the formula applies to the full reported income before deductions. Median household income across Massachusetts is $89,026 annually, which shapes the real-world dollar obligations families face under these percentages.

On the enforcement side, the Massachusetts child support program manages 180,000 active cases and collected approximately $510 million in the most recent OCSE reporting year. The state's collection rate of 65.9% compares to a national average of 60.6% across reporting states — placing Massachusetts at rank #8 of 51 on collection efficiency, and rank #26 by caseload volume (national average: 285,686 cases per state). Paternity is established in 96.5% of Massachusetts cases, compared to 94.9% nationally — a critical step because child support orders cannot be enforced without legal parentage on record. Orders are in place for 81.4% of the caseload.

Context matters when interpreting these numbers. A higher percentage-of-income figure does not automatically mean higher dollar obligations — the underlying income brackets, deductions, parenting-time adjustments, and self-support reserves vary meaningfully between states. Massachusetts allows a parenting time adjustment, which can materially reduce the base obligation when the non-custodial parent exercises substantial overnight time. Use the official Massachusetts calculator linked below for a binding estimate. Data sources: OCSE FY2022 Annual Report, Massachusetts Revised Statutes, and Census ACS 2022.