Alimony is no longer tax deductible because Congress repealed the deduction in the Tax Cuts and Jobs Act of 2017 to raise federal revenue and shut down what lawmakers viewed as an income-shifting loophole between former spouses. For any divorce or separation agreement finalized after December 31, 2018, the payer cannot deduct alimony, and the recipient owes no federal income tax on it.1Internal Revenue Service. Topic No. 452, Alimony and Separate Maintenance The change is permanent.
The Reasoning Congress Gave
The deduction had been on the books since 1942. Under that framework, the paying spouse deducted every dollar, and the receiving spouse reported the same dollars as taxable income. Because payers usually earn more than recipients, the arrangement moved income from a higher bracket to a lower one. The combined federal tax bill for the two ex-spouses came out lower than what the Treasury would have collected had the earner simply been taxed on the full amount. Lawmakers described this as a federal subsidy for divorce.
There was also a compliance gap that got worse over time. Studies found tens of thousands more taxpayers claiming the alimony deduction each year than reporting the matching income. The government was losing money at both ends of the transaction. Making alimony non-deductible and non-taxable closes the gap: the earner is taxed on the income before it changes hands, and no one has anything to report or claim.
The Joint Committee on Taxation estimated the repeal would produce roughly $6.9 billion in additional federal revenue over ten years. That money helped offset the cost of the corporate rate cut that anchored the same law. In tax terms, alimony now behaves like child support: a private transfer between former spouses with no federal consequences on either side.2Internal Revenue Service. Alimony, Child Support, Court Awards, Damages 1
The Cutoff Date That Decides Which Rules Apply
Everything turns on when your agreement became legally binding. Agreements executed after December 31, 2018 fall under the new rules: no deduction, no taxable income.3Internal Revenue Service. Publication 504 (2025), Divorced or Separated Individuals – Section: Alimony The old Section 215 of the Internal Revenue Code was repealed by Section 11051 of the Tax Cuts and Jobs Act, with the effective date keyed to instruments executed after 2018.4Office of the Law Revision Counsel. 26 USC 215 – Repealed
The date the agreement was signed and became binding is what counts. Not when you separated. Not when you filed. Not when payments started. A case filed in 2018 with a decree signed in January 2019 falls under the new rules. Temporary support orders issued earlier don’t fix the date.
Agreements executed on or before December 31, 2018 are grandfathered. The payer still deducts, the recipient still reports, and that treatment continues indefinitely unless a modification changes it.1Internal Revenue Service. Topic No. 452, Alimony and Separate Maintenance
What the Change Costs the Payer
If your agreement was finalized after 2018, you pay alimony with after-tax dollars. There is no line on your federal return for these payments, and your taxable income is the same as it would be if you had made no payments at all.1Internal Revenue Service. Topic No. 452, Alimony and Separate Maintenance
The dollars add up quickly at higher incomes. Someone in the 37% bracket paying $50,000 a year used to save $18,500 in federal tax through the deduction. That savings is gone. Divorce attorneys have adjusted accordingly. Because the payer can no longer offset the cost with a deduction, negotiated monthly amounts tend to compress, and payers often push for a larger share of marital property instead of higher ongoing support.
What the Recipient Gets, and Gives Up
Recipients under post-2018 agreements receive alimony free of federal income tax. It is not reported on your return and does not enter your adjusted gross income.3Internal Revenue Service. Publication 504 (2025), Divorced or Separated Individuals – Section: Alimony That simplifies filing and can keep other income you do earn in a lower bracket.
The trade-off matters for retirement savers. Because the alimony is not taxable compensation, it does not count as earned income for IRA contribution purposes. Under the old rules, recipients could treat taxable alimony as compensation and fund a traditional or Roth IRA up to the annual limit. That door is closed for post-2018 agreements.5Internal Revenue Service. Topic No. 451, Individual Retirement Arrangements (IRAs) If alimony is your only support and you have no wages or self-employment income, you cannot contribute to an IRA based on it. Recipients whose agreements are grandfathered still can.
Modifying a Grandfathered Agreement Can Pull You Into the New Rules
Amending a pre-2019 agreement does not automatically switch the tax treatment. The new rules take over only when two conditions are met: the modification changes the alimony terms, and the modification specifically states that the payments are not deductible by the payer or includable in the recipient’s income.6Internal Revenue Service. Divorce or Separation May Have an Effect on Taxes Without that explicit language, the original treatment continues.
The direction cuts both ways. If preserving the deduction matters to the payer, any modification should be drafted so that it does not adopt the new rules. If the parties would actually be better off under the new treatment, because the recipient is now in a higher bracket than the payer, they can opt in by including the required language. Either way, a single sentence in a modification can flip the tax outcome of every future payment, and the drafting deserves careful review.
The Repeal Has No Expiration
Several Tax Cuts and Jobs Act provisions were temporary and set to expire or shift after 2025, including individual bracket adjustments, the higher standard deduction, and the SALT cap. The alimony deduction repeal is not among them. Congress made the elimination of Sections 71 and 215 permanent, with no sunset.4Office of the Law Revision Counsel. 26 USC 215 – Repealed The One Big Beautiful Bill Act, signed in July 2025, extended many expiring TCJA provisions but did not bring the alimony deduction back.
For divorces finalized in 2026 and beyond, there is no basis to expect the deduction will return. Settlement planning should assume the current rules are the rules.
State Income Tax May Not Follow Federal Law
The federal treatment is only part of the picture if you live in a state with an income tax. Some states conform to federal law, so alimony is neither deductible nor taxable at the state level for post-2018 agreements. Others have decoupled from the federal change and still follow the old rules, allowing the payer a state-level deduction and requiring the recipient to report the income. California continues to allow the deduction. Check your state’s rules before assuming federal treatment carries over, because the state-level answer can shift the real after-tax cost of alimony for both sides.