How Alimony Is Taxed and Why the Date Matters
Maintenance paid to a former spouse used to be deductible by the payer and taxable to the recipient. For agreements executed from 2019 onwards it is neither. Both regimes are still running side by side, because older agreements keep their original treatment, and a household planning retirement around either one needs to know which it is under.
- The execution date governs:: Before 2019, deductible and taxable; from 2019, neither.
- Child support is never alimony:: It has never been deductible or taxable to either party.
- Modification can switch regimes:: A post-2018 modification can adopt the newer rules if it expressly says so.
- Old agreements affect retirement income:: Taxable maintenance counts as income for several other thresholds.
Where the AI summary above gets this wrong
"Alimony is tax deductible for the person paying it."
That's surface-true. Here's what it misses:
- That stopped being true for new agreements from 2019 — Agreements executed after 2018 give the payer no deduction and the recipient no taxable income. Older agreements keep the previous treatment indefinitely, so both systems run at once and generic advice is right for roughly half of the people reading it.
- Taxable maintenance drags other thresholds with it — Where an older agreement makes payments taxable, that income counts towards the thresholds that decide how much of a Social Security benefit is taxed and towards the Medicare premium surcharge. A recipient can find the maintenance costs them more than its own tax.
- Modifying an old agreement is a decision, not an administrative step — A modification after 2018 can bring an older agreement under the newer rules, but only if it expressly provides for that. Since the two regimes divide the tax burden differently between the parties, whether to include that provision is a negotiation with real money attached.
01 Two regimes running at once
Under the older rules, maintenance paid under a divorce or separation instrument was deductible by the payer without itemising, and included in the recipient's gross income. That shifted income from a higher-rate payer to a lower-rate recipient, which is why orders were sized around it.
For instruments executed after 2018 the deduction and the inclusion both disappeared. The payer bears the tax on the money and the recipient receives it free of federal income tax.
Older instruments were not swept up. An agreement executed in 2015 keeps its treatment today, which is why the first question about any maintenance order is when it was executed rather than what it says.
Shows: what a maintenance payment actually costs the payer, depending on whether the pre-2019 deduction applies to the agreement. Ignores: the recipient's tax position, state treatment which may differ from federal, child support included in the same order, and any modification of the agreement.
02 What counts and what does not
To be alimony under the older rules, payments had to be in cash under a divorce or separation instrument, not designated as something else, and must end at the recipient's death. Payments continuing after death are not alimony.
Child support has never been deductible or taxable, and where an order covers both, the child support element is identified separately. A payment that reduces when a child reaches a given age can be treated as child support regardless of what the order calls it.
Property settlements are also outside it. Dividing assets between spouses is generally not a taxable event, and a transfer of a retirement account under a court order is handled through its own mechanism rather than as maintenance.
03 Where it lands on the return
Under the older rules the payer deducts the payments in arriving at adjusted gross income and reports the recipient's identifying number. The recipient includes the same amount as income.
Because the deduction reduces adjusted gross income rather than being an itemised deduction, it also reduces the income figure used for several other tests — which for a retired payer can matter more than the tax itself.
Under the newer rules neither party reports anything. The payment is invisible on both returns, which simplifies the filing and shifts the whole tax burden onto the payer, and that is the change the negotiation has to reflect.
Neither regime changes how the rest of a settlement is taxed. Dividing a house, splitting a brokerage account and transferring a pension under a court order each follow their own rules, and a maintenance figure agreed without reference to those can look fair on paper while leaving one party with all the embedded tax.
Find the execution date before you plan anything. I have sat with people who budgeted a retirement on the assumption that the maintenance they pay is deductible, and it is not, because the agreement was signed in 2020. The difference on a thirty-thousand-dollar order is thousands a year, every year, and it is the sort of thing that gets discovered by an accountant in April rather than by anyone in advance.
FAQ
Is alimony still tax deductible?
Only for divorce or separation agreements executed before 2019. Agreements executed from 2019 give no deduction to the payer and no taxable income to the recipient.
Does modifying an old order change the treatment?
It can. A modification after 2018 can bring the agreement under the newer rules, but only where the modification expressly provides for that.
Is child support treated the same way?
No. Child support has never been deductible by the payer or taxable to the recipient under either regime.
Sources
Regulator references
- Publication 504: Divorced or separated individuals · Internal Revenue Service · 2026The treatment of payments between former spouses and the date that splits it.Last verified: 2026-09-07
- Topic 452: Alimony and separate maintenance · Internal Revenue Service · 2026What counts as alimony and what does not.Last verified: 2026-09-07
- Publication 17: Your federal income tax · Internal Revenue Service · 2026Where the income and any deduction land on the return.Last verified: 2026-09-07
Calculator unit tests · the assertions this page's worked example is checked against, and their last result
Changelog
- 2026-09-07 — initial publish (new format)
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Jordan Reeves
Founder of Talk Through Wealth. A software engineer for over a decade before turning to retirement planning, Jordan built the projection engine after watching family members get fragmented, country-by-country advice that never reconciled. He writes about retirement the way the engine computes it: month-by-month, lifetime-long, and skeptical of any rule of thumb that hasn't been run through the math.