Recently Divorced: Alimony Tax Treatment Planning

Alimony tax rules changed dramatically in 2019. Understanding whether your agreement follows pre-2019 or post-2018 rules is essential for accurate filing and future tax planning.

The date that changes everything: The Tax Cuts and Jobs Act of 2017 drew a hard line at December 31, 2018. For divorce agreements executed after that date, alimony is neither deductible by the payer nor taxable to the recipient. For agreements executed before January 1, 2019, the old rules still apply: the payer deducts alimony, and the recipient reports it as income.

Pre-2019 agreements still follow old rules: If your original divorce was finalized before 2019, the payer deducts alimony and the recipient includes it in gross income. This remains true even in 2026 -- the old rules do not sunset. However, if you modify a pre-2019 agreement and the modification specifically states that the TCJA rules apply, the new treatment kicks in.

What counts as alimony for the IRS: Payments must be in cash, required by the decree, not designated as something else (like child support), and must end at the recipient's death. Failing any of these tests reclassifies payments as non-alimony.

The pitfall: The difference between pre-2019 and post-2018 treatment can be tens of thousands of dollars annually. A payer under old rules deducts at their marginal rate; under new rules, they get no deduction at all. If you are negotiating or modifying an agreement, the tax treatment should directly affect the dollar amount agreed upon.