The Massachusetts Supreme Judicial Court's decision in Cavanagh v. Cavanagh (490 Mass. 398, 2022) eliminated the informal 50% cap on combined alimony and child support that practitioners assumed since the 2012 Alimony Reform Act. High-income orders can now reach 55-60% of a payor's gross income, and judges must calculate and document two competing scenarios before entering any order.
| Detail | Summary |
|---|---|
| What happened | The SJC in Cavanagh v. Cavanagh rejected the de facto rule that alimony plus child support cannot exceed roughly 50% of income |
| When | Decided September 2022; now standard practice in Massachusetts Probate and Family Courts |
| Where | Massachusetts (statewide, all Probate and Family Court divisions) |
| Who's affected | Divorcing couples with combined income above $250,000, especially high earners and their spouses |
| Key statute/rule | G.L. c. 208, § 53(c)(2) (Alimony Reform Act); Massachusetts Child Support Guidelines |
| Impact | Combined support can now reach 55-60% of gross income; two-scenario calculation now mandatory |
Why this ruling changes Massachusetts support math
Cavanagh v. Cavanagh fundamentally changes how Massachusetts courts calculate support when both alimony and child support are in play. Before this 2022 decision, family law attorneys operated under a widely-held assumption: G.L. c. 208, § 53 capped alimony at 30-35% of the difference between the parties' incomes, and courts informally treated combined support as unlikely to exceed 50% of a payor's income.
The SJC dismantled that assumption. The Court held that the 2012 Alimony Reform Act does not impose a mathematical ceiling on combined support, and that judges had been misapplying G.L. c. 208, § 53(c)(2) by treating income used for child support as automatically excluded from the alimony calculation. In practical terms, a high earner making $600,000 who previously expected roughly $300,000 in maximum combined support exposure may now face orders reaching $330,000 to $360,000 annually. The ruling is retroactive in effect for anyone seeking modification, which is why orders entered under the old assumed cap are now vulnerable.
How Massachusetts law handles the two-scenario calculation
Massachusetts courts must now run two separate calculations and document both, according to the SJC's Cavanagh methodology. This dual-calculation requirement is the operational heart of the decision and applies in every case where alimony and child support are both requested.
Under G.L. c. 208, § 53 as interpreted by Cavanagh, judges must calculate:
- Scenario A — Child support first: Calculate child support under the Massachusetts Child Support Guidelines, then calculate alimony on the remaining income.
- Scenario B — Alimony first: Calculate alimony under § 53, then calculate child support on the income remaining after alimony.
The judge must then compare the two outcomes and select the order that is most equitable, explaining the reasoning on the record. The Massachusetts Child Support Guidelines apply presumptively to combined income up to $400,000 (raised from $250,000 in the 2021 Guidelines revision), and the Cavanagh framework governs how income above and below that threshold interacts with alimony. Because the statutory alimony ceiling under § 53(b) remains 30-35% of the income differential, the combined figure can still climb to 55-60% of gross income once child support is layered on top of a full alimony award. Courts retain discretion, but they can no longer default to a 50% ceiling without articulating why.
Practical takeaways for Massachusetts divorcing spouses
Cavanagh v. Cavanagh creates concrete action items for anyone with a Massachusetts support order or an active case. High-income payors and recipients both have reasons to review their situation now.
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Review existing orders entered before September 2022. If your combined alimony and child support order was calculated under the assumed 50% cap, it may be modifiable. A material change in circumstances plus the Cavanagh methodology could support a modification action under G.L. c. 208, § 37.
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Demand the two-scenario worksheet in any active case. If you are negotiating or litigating support, insist that both the child-support-first and alimony-first calculations appear in the record. An order that skips this step is exposed on appeal.
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High earners should model 55-60% exposure, not 50%. If your gross income exceeds $250,000, budget for the possibility that combined support reaches into the high-50-percent range rather than assuming a hard 50% ceiling.
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Recipients of pre-2022 orders may have grounds to seek more. If your award was suppressed by the old cap assumption, the Cavanagh framework may support an upward modification, subject to proving changed circumstances.
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Get the income documentation right. Because the calculation now turns on which support type is computed first, precise documentation of gross income, bonuses, RSUs, and self-employment income under the Child Support Guidelines definition of income is more consequential than ever.
If you are facing a Massachusetts divorce involving significant income, alimony, or an order entered before this ruling, connecting with a Massachusetts family law attorney who understands the Cavanagh methodology can help you understand whether your order is calculated correctly or ripe for modification. You can also use our free resources and calculators to model your situation before that conversation.
This article discusses recent news and provides general legal commentary. It does not constitute legal advice. Every case is unique. Consult a qualified family law attorney for advice specific to your situation.