Spousal Support Guide

Reviewed by Paz Delacroix (PD), Editor-in-Chief — Family Law & Divorce Litigation Practice. Updated May 2026.

Spousal support — also called alimony or maintenance — is financial support paid by one spouse to the other after separation or divorce. It exists to address the economic consequences of a marriage that left one spouse in a significantly different financial position than the other: fewer years in the workforce, reduced earning capacity, career choices made to support the higher-earning spouse, or childcare obligations that have prevented career investment. Understanding how support is determined, what drives the amount and duration, and how it can be modified or terminated is essential for both the paying and receiving spouse.

Types of Spousal Support

Temporary support (pendente lite): ordered during the divorce proceeding itself, before the final decree. Temporary support maintains the status quo while the case is pending — keeping bills paid, preserving the standard of living, and preventing one spouse from gaining leverage over the other through financial pressure during negotiations. Temporary support terminates when the divorce is finalized and is replaced by whatever the final decree specifies.

Rehabilitative support: the most common form of modern alimony. Rehabilitative support is designed to help the lower-earning spouse become self-sufficient — by funding job training, education, or career re-entry — for a defined period. It reflects the modern preference for time-limited support that empowers financial independence rather than indefinite income transfers. The duration is keyed to a rehabilitation plan: how long it will reasonably take for the recipient to reach earning capacity adequate to support themselves at a reasonable standard of living.

Long-term or permanent support: awarded in long marriages with large income disparities where the supported spouse cannot reasonably become self-supporting. More common in marriages of 15 or more years where the lower-earning spouse is older, has been out of the workforce for many years, or has health limitations that prevent workforce reentry. Modern family law disfavors permanent alimony even in long marriages, and many states have reformed their statutes to require a finding that the recipient cannot become self-supporting before indefinite support is awarded.

Reimbursement alimony: awarded to compensate a spouse who supported the other’s education or career development — paying tuition, working while the other attended school, relocating for the other’s career — and then received a reduced share of the resulting earnings due to divorce. Reimbursement alimony is less about ongoing support needs and more about equity for the investing spouse whose investment did not yield the expected lifetime return.

Lump sum alimony: a one-time payment rather than an ongoing stream. Sometimes preferred by the paying spouse (clean break, no ongoing obligation) or where an ongoing payment stream carries enforcement risk. Lump sum alimony is not modifiable, which is both its advantage and its limitation.

How Amounts Are Calculated

There is no universal formula for spousal support. Most states give courts broad discretion to set amounts based on multi-factor analysis rather than a mechanical calculation. The factors most consistently weighted across jurisdictions include: the income gap between the spouses; the length of the marriage; the standard of living during the marriage; each spouse’s age, health, and earning capacity; the career sacrifices made during the marriage by the lower-earning spouse; childcare obligations that limit workforce reentry; and the time needed for rehabilitation.

A minority of states use formulas. California’s rule of thumb (not a statute, but widely applied by family law courts and mediation practitioners) calculates support as 40% of the higher earner’s net monthly income minus 50% of the lower earner’s net monthly income. New Jersey has historically applied a similar net-income-based approach. Texas awards nominal or no alimony in most cases due to a statutory cap. Massachusetts has a detailed alimony reform act that specifies different support types with corresponding duration limits. Understanding your specific state’s approach — whether formula-based, discretionary, or some combination — is a prerequisite for meaningful financial planning.

The calculator on this site uses 25% of the gross income gap as a generalized estimate. This is a starting point for orientation, not a prediction of what a court will order. Actual support amounts vary significantly by state and by judge.

Duration

Support duration is driven primarily by marriage length and the time needed for rehabilitation. The informal benchmark recognized across many equitable distribution jurisdictions is one year of support for every two years of marriage for marriages in the five to fifteen year range. For marriages under five years, courts rarely award support or award it for less than a year. For marriages over fifteen years, the duration often exceeds the half-marriage benchmark and may be indefinite.

The calculator uses marriage length in months as the duration estimate, capped at 120 months (10 years). This produces a conservative estimate: for a 10-year marriage it suggests 120 months of support, which is on the high end of typical outcomes. For marriages over ten years, the actual duration cap used by courts is often longer than the calculator’s 10-year ceiling, particularly for long marriages with large income disparities.

Review and sunset clauses: many settlement agreements include provisions that support will be reviewed at a specific future date, at which point either party can petition for modification based on changed circumstances. This gives the paying spouse a path to reduction if the recipient achieves employment, and gives the recipient protection if rehabilitation takes longer than anticipated.

Tax Treatment (Post-2018)

The 2017 Tax Cuts and Jobs Act fundamentally changed the federal tax treatment of alimony for divorces finalized after December 31, 2018. Under the new rules: alimony payments are not deductible by the paying spouse, and alimony received is not includible in gross income by the receiving spouse. The pre-2018 rules (deductible to the payer, taxable to the recipient) continue to apply to divorce agreements executed before January 1, 2019, unless the agreement is modified to expressly apply the new rules.

The practical effect of this change is significant. Under the old rules, alimony was a tax-efficient transfer — the payer was in a higher tax bracket and deducted the payment, while the recipient was in a lower bracket and paid tax on the receipt. The net cost to the paying spouse (after the tax benefit) was lower than the gross payment amount. Under the new rules, the paying spouse gets no deduction, so the after-tax cost of a given support payment is higher. This shifts the economic balance in settlement negotiations — the same gross alimony number costs the payer more under the new rules, which may affect what both parties are willing to accept.

For pre-2019 divorce agreements still in effect, the question of whether to modify (and trigger the new rules) versus leave unchanged (and preserve the old deductibility) is a significant planning consideration that should be analyzed with a tax professional before any modification is made.

Modification and Termination

Unless the settlement agreement specifies that support is non-modifiable, either party can petition the court to modify support based on a substantial change in circumstances. What qualifies: significant increase or decrease in either party’s income; job loss by the paying spouse; serious illness or disability affecting the paying or receiving spouse’s earnings; the receiving spouse obtaining full-time employment. Courts apply a high threshold for modification — minor income fluctuations do not qualify.

Support terminates automatically (in most states) upon: the death of either party; the remarriage of the receiving spouse; and in many states, the cohabitation of the receiving spouse with a romantic partner in a relationship of indefinite duration. Cohabitation as a termination trigger varies significantly by state: some states terminate support automatically upon cohabitation, others require the paying spouse to petition for modification and prove that the cohabitation has reduced the recipient’s need.

Lump-sum alimony is generally not subject to modification once ordered. Periodic (monthly) alimony is modifiable unless the settlement agreement expressly states otherwise. Settlement agreements frequently include non-modification clauses — particularly when the parties have negotiated a specific support amount in exchange for a trade on property division — that should be drafted carefully to reflect the parties’ actual intent.

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