Massachusetts' Cavanagh v. Cavanagh requires judges to run two separate support calculations — alimony-first and child-support-first — then adopt the more equitable result. Reported by the Boston Bar Association Journal, this framework dismantles the informal 50%-of-income ceiling, allowing combined obligations to reach 55-60% of gross income for high earners in 2026 cases.
Key Facts
| Detail | Summary |
|---|---|
| What happened | Massachusetts courts now apply the Cavanagh dual-calculation method to combined alimony and child support |
| When | Decided 2002; heavily applied in 2026 cases after clarifying appellate guidance |
| Where | Massachusetts (statewide, Probate and Family Court) |
| Who's affected | Divorcing couples with children where income exceeds the $400,000 child support guidelines cap |
| Key statute/rule | Mass. Gen. Laws ch. 208 § 53 (alimony); Massachusetts Child Support Guidelines |
| Impact | Combined support can reach 55-60% of gross income, replacing the old 30-35% alimony ceiling |
Why This Matters Legally
The Cavanagh framework ends the era of simple, single-formula support calculations in Massachusetts. Judges can no longer pick one calculation path and stop; they must run both an alimony-first and a child-support-first computation, compare the outcomes, and select whichever produces the more equitable and adequate result for the family.
This dual-calculation requirement matters because it directly attacks the informal 50%-of-income ceiling that many practitioners treated as a hard cap. Under the Massachusetts Alimony Reform Act of 2011, general term alimony generally should not exceed 30-35% of the difference between the parties' gross incomes. But Cavanagh clarified that this alimony percentage operates alongside — not inside — the child support guidelines. When both obligations stack, the combined figure can climb well past what either formula alone would suggest, reaching 55-60% of a high earner's gross income.
The companion case that intensifies this effect is Openshaw v. Openshaw, which counts marital savings as a component of 'need.' Historically, need meant covering monthly expenses. Openshaw expanded that definition so that if a couple routinely saved a portion of income during the marriage, the recipient spouse's need can include maintaining that savings rate. Combined with Cavanagh's dual calculation, a payor spouse who earns substantially more can now face a support order that funds both the household expenses and the historical savings pattern of the marriage.
How Massachusetts Law Handles This
Massachusetts calculates alimony under Mass. Gen. Laws ch. 208 § 53, which directs courts to consider the length of the marriage, each party's income and employability, the marital lifestyle, and economic and non-economic contributions. Child support runs on a separate track under the Massachusetts Child Support Guidelines, which apply a formula to combined available income up to a presumptive cap of $400,000 in combined annual gross income.
Before Cavanagh, judges often calculated child support first, then set alimony on the remaining income — a sequence that mechanically limited alimony and kept combined support lower. Cavanagh reversed that habit by requiring both sequences. In the alimony-first path, the court sets spousal support under § 53, then calculates child support on the payor's reduced (post-alimony) income and the recipient's increased income. In the child-support-first path, the court applies the guidelines first, then determines alimony on what remains. Because tax treatment and income allocation differ between the two paths, the results diverge — and the judge must choose the more equitable one.
For income above the $400,000 guidelines cap, courts exercise discretion rather than applying a rigid formula. This is precisely where Openshaw's savings-as-need principle expands obligations. A high earner grossing $1 million annually, for example, could see the court treat a historical 20% marital savings rate as part of the recipient's ongoing need, pushing combined alimony and child support toward the 55-60% range. Understanding alimony and how Massachusetts defines marital need is now central to any high-asset divorce in the Commonwealth.
Practical Takeaways
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Run both calculations before you negotiate. If you are a payor or recipient in a Massachusetts divorce involving children, insist that your attorney model both the alimony-first and child-support-first outcomes. The gap between them can be tens of thousands of dollars per year, and Cavanagh entitles you to argue for the more favorable equitable result.
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Document your marital savings pattern. After Openshaw, historical savings can count as 'need.' Recipients should gather bank statements, investment contributions, and retirement deposits showing a consistent savings rate. Payors should be prepared to show that savings fluctuated or reflected one-time events rather than a fixed pattern. Estimate scenarios with our alimony estimator.
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Reassess any pre-2026 assumptions about a 50% ceiling. If you settled or are modifying an order based on the old informal cap, the current framework may support a different number. This is especially relevant if income exceeds the $400,000 guidelines cap, where judicial discretion now leans on Cavanagh and Openshaw.
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Model child support separately from alimony. Because the two obligations interact, use our Massachusetts child support calculator to understand the guidelines baseline before layering alimony on top. Combined support planning starts with an accurate child support figure.
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If circumstances change, understand modification standards. A payor facing a 55-60% combined obligation who later loses income should review the process for spousal support modification, which requires a material change in circumstances under Massachusetts law.
Massachusetts high earners now face a support landscape defined by discretion, dual calculations, and an expanded definition of need — not the predictable formulas of the past decade. Because these outcomes turn on how each calculation is modeled and how marital savings are documented, working through your situation with an experienced professional is the difference between a defensible order and an unfavorable one. If you are navigating a divorce in the Commonwealth, you can build a personalized divorce roadmap or find a divorce attorney to review your numbers.
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.