The Massachusetts Supreme Judicial Court's 2023 decision in Cavanagh v. Cavanagh now requires judges to perform two separate calculations when a case involves both alimony and child support, and permits combined obligations to exceed the long-assumed 50%-of-income ceiling—reaching 55% to 60% in high-income cases. For Massachusetts payers and recipients, this means the predictable formulas that governed support for over a decade no longer guarantee an outcome.
Key Facts
| Item | Detail |
|---|---|
| What happened | The SJC's Cavanagh v. Cavanagh ruling requires two separate support calculations and removes the assumed 50% income cap |
| When | Decided 2023; analyzed alongside the companion Openshaw decision in commentary published December 2025 |
| Where | Massachusetts (statewide, all Probate and Family Court divisions) |
| Who's affected | Divorcing spouses with both alimony and child support, especially higher earners |
| Key statute | Mass. Gen. Laws c. 208 § 53 (Alimony Reform Act) |
| Impact | Combined obligations may reach 55-60% of income; judges have wide discretion |
Why this ruling matters legally
The Cavanagh decision fundamentally changed how Massachusetts courts calculate support when alimony and child support overlap. Before this ruling, practitioners and judges widely assumed that combined support could not exceed roughly half of the payer's income. Cavanagh dismantled that assumption.
Under the SJC's framework, a judge must now run two distinct calculations. The first calculates child support first, then determines alimony on the remaining income. The second calculates alimony first under Mass. Gen. Laws c. 208 § 53, then child support on what remains. The court then compares the two results and selects the approach that produces the most equitable outcome for the family. This two-track method, required because the SJC found that mechanically stacking both awards could produce unfair results, replaced the simpler stacking approach attorneys had relied on for years.
The companion Openshaw ruling compounded the shift. Openshaw held that a couple's established habit of saving money during the marriage counts as part of the recipient spouse's demonstrated 'need.' Because alimony under Massachusetts law is capped at the recipient's need or 30-35% of the income difference between spouses, treating savings as need expands the ceiling for what a recipient can claim, as the Lynch & Owens analysis explains.
How Massachusetts law handles alimony and child support
Massachusetts caps general term alimony at the recipient's need or 30 to 35 percent of the difference between the spouses' gross incomes, whichever is less, under Mass. Gen. Laws c. 208 § 53(b). Child support is governed separately by the Massachusetts Child Support Guidelines, which apply a formula to combined available income. The friction Cavanagh resolved arises because the same dollars of income cannot fairly be counted twice.
The 2011 Alimony Reform Act, codified at Mass. Gen. Laws c. 208 §§ 48-55, was designed to bring predictability to alimony by defining four types of alimony, setting durational limits tied to marriage length, and capping amounts. Cavanagh and Openshaw did not repeal those provisions. Instead, the SJC interpreted how the Act interacts with child support obligations, restoring substantial judicial discretion that the Act's drafters arguably intended to constrain.
For marriages of varying length, the durational limits remain. A marriage of 5 years or less yields alimony for no more than 50% of the months married; a marriage of 15 to 20 years caps alimony at 80% of the months; and marriages over 20 years may result in indefinite alimony, under Mass. Gen. Laws c. 208 § 49. What changed is the dollar amount calculation when child support is also in play, not the duration framework.
The practical consequence is that two Massachusetts families with nearly identical incomes can now receive materially different support orders depending on which judge hears the case and which calculation method that judge deems most equitable. This is the opposite of the predictability the 2011 reform promised.
Practical takeaways for Massachusetts residents
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Expect two calculations, not one. If your divorce involves both alimony and child support, your attorney should run both the child-support-first and alimony-first methods and argue for the result most favorable to your position. Ask which method your proposed order uses.
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Document your marital savings rate. After Openshaw, a recipient seeking to maximize support should gather bank statements, retirement contributions, and investment records showing the household routinely saved during the marriage. Payers should be prepared to contest inflated 'need' claims based on savings.
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Do not assume a 50% ceiling protects you. Payers in high-income Massachusetts divorces should plan for combined obligations that may reach 55-60% of gross income. Budget and negotiate accordingly rather than relying on the old cap.
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Consider the forum and the judge. Because Cavanagh restored wide discretion, the specific Probate and Family Court division and assigned judge now matter more than under the rigid 2011 formulas. An experienced local attorney's knowledge of a judge's tendencies has real value.
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Revisit existing agreements before modifying. If you have an older support order and are considering a modification, understand that the court will apply the Cavanagh framework to any recalculation, which could increase or decrease your obligation compared to the original formula-based order.
If you are navigating a Massachusetts divorce involving both alimony and child support, the Cavanagh and Openshaw decisions make it more important than ever to understand how the two-calculation method and the savings-as-need standard could affect your outcome. A consultation with a Massachusetts family law attorney can help you model the likely range of obligations and build a strategy around the discretion judges now hold.
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.