Alimony Calculator

What This Means For You

How Alimony (Spousal Support) Is Determined

Alimony — legally called spousal support or spousal maintenance — is a court-ordered payment from one spouse to the other during or after divorce. Its purpose is to limit the unfair economic impact of divorce by providing continued income to a spouse who earned less or sacrificed career advancement during the marriage.

There is no single federal formula for alimony — each state has its own guidelines or leaves it to judicial discretion. However, most states consider similar factors: income disparity between spouses, length of marriage, standard of living during marriage, age and health, earning capacity, childcare responsibilities, and contributions to the other spouse's education or career.

A common guideline formula (used in several states): 30-40% of the higher earner's gross income minus 50% of the lower earner's gross income. If the higher earner makes $150,000 and the lower earner makes $50,000: (40% × $150,000) - (50% × $50,000) = $60,000 - $25,000 = $35,000/year ($2,917/month). However, courts have wide discretion to deviate based on circumstances.

Types of Alimony

Temporary alimony (pendente lite): Paid during the divorce process to maintain both spouses' living standards until the final settlement. Typically ends when the divorce decree is issued and permanent alimony (if any) begins.

Rehabilitative alimony: The most common type. Supports the lower-earning spouse for a specific period while they gain education, training, or work experience to become self-supporting. Example: 3-5 years while a stay-at-home parent completes a degree or re-enters the workforce. Includes a defined endpoint or milestones.

Permanent alimony: Continues indefinitely (until death, remarriage, or cohabitation). Increasingly rare — reserved for long marriages (20+ years) where the receiving spouse is unlikely to become self-supporting due to age, health, or long-term absence from the workforce. Some states have eliminated permanent alimony entirely (Texas limits alimony to 5-10 years; Florida reformed its alimony laws in 2023).

Lump-sum alimony: A one-time payment instead of ongoing monthly payments. Advantageous for both parties in some cases: the paying spouse avoids long-term obligation; the receiving spouse has certainty and can invest the lump sum. Often negotiated as part of the property division rather than a separate alimony award.

Reimbursement alimony: Compensates a spouse who supported the other through education or career development. Example: one spouse worked to support the family while the other completed medical school. Reimbursement alimony repays that investment, regardless of the couple's income disparity at divorce.

Alimony Tax Rules (Post-2019)

The Tax Cuts and Jobs Act of 2017 fundamentally changed alimony taxation for divorces finalized after December 31, 2018:

Divorces finalized after 2018: Alimony is NOT deductible by the payer and NOT taxable income for the recipient. The paying spouse pays alimony from after-tax income. This increases the total cost of alimony for the higher earner and effectively reduces the tax benefit that previously existed in the system.

Divorces finalized before 2019: The old rules still apply — alimony IS deductible by the payer and IS taxable income for the recipient. This makes pre-2019 alimony agreements more tax-efficient overall (income shifts from a higher bracket to a lower bracket). These older agreements are grandfathered unless formally modified to adopt the new rules.

Impact on negotiations: The elimination of the alimony deduction means the paying spouse bears a higher after-tax cost. On $36,000/year in alimony at a 32% marginal rate: pre-2019, the after-tax cost was $24,480 (deduction saved $11,520). Post-2019: the after-tax cost is the full $36,000. This has generally led to lower alimony awards post-2019, because courts recognize the increased burden on the payer.

Child support distinction: Child support is always non-deductible for the payer and non-taxable for the recipient, regardless of when the divorce occurred. It is legally and tax-wise separate from alimony, though both may be part of the same divorce agreement.

How Long Does Alimony Last?

Duration depends on marriage length, state law, and circumstances:

Short marriages (under 10 years): Alimony typically lasts 1/3 to 1/2 the length of the marriage. A 6-year marriage: 2-3 years of support. Many states have specific formulas tying duration to marriage length.

Medium marriages (10-20 years): Duration increases but is still finite in most states. Rehabilitative alimony for 5-10 years is common, with the expectation that the receiving spouse will become self-supporting.

Long marriages (20+ years): Historically eligible for permanent alimony, but the trend is away from permanent awards. Even in long marriages, many states now set a maximum duration or require periodic review. Florida's 2023 reform eliminated permanent alimony entirely, capping durational alimony at specific percentages of marriage length.

Modification and termination: Alimony can typically be modified if either party experiences a substantial change in circumstances: job loss, significant income increase, serious illness, or retirement. Alimony usually terminates upon the recipient's remarriage. Cohabitation (living with a new partner) may reduce or terminate alimony in many states — definitions and thresholds vary. Death of either party ends the obligation unless the decree specifies otherwise (life insurance may be required to secure ongoing payments).

Frequently Asked Questions