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Tax deductions, credits, and amortization

Are alimony payments deductible if the legal separation occurred in 2018 and the divorce was finalized in 2023?

Last updated: 
Sep 2025
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Answer

To determine whether alimony payments are deductible when a legal separation occurred in 2018 and the divorce was finalized in 2023, it is necessary to analyze the tax treatment of alimony under the relevant law changes and the timing of the legal instruments.

1. Key Legal Principles:

  1. Tax Cuts and Jobs Act (TCJA) Changes:
  2. For divorce or separation instruments executed after December 31, 2018, alimony payments are not deductible by the payer and are not includible in the recipient’s income.
  3. For instruments executed on or before December 31, 2018, and not modified after that date (or modified after that date but not expressly adopting the new law), alimony payments remain deductible by the payer and includible in the recipient’s income.
  4. Definition of Divorce or Separation Instrument:
  5. This includes a decree of divorce or separate maintenance, a written separation agreement, or a court order requiring payments for support or maintenance.
  6. Effect of Modification:
  7. If a pre-2019 instrument is modified after 2018 and the modification expressly states that the new law applies, the payments are not deductible/includible.

2. Application to the Facts:

  • Legal Separation in 2018:
     If a written separation agreement or court order requiring alimony was executed in 2018, and that instrument was not modified after 2018 to expressly adopt the new law, then alimony payments made under that instrument are deductible by the payer and includible in the recipient’s income—even if the divorce is finalized later.
  • Divorce Finalized in 2023:
     If, in 2023, a divorce decree is issued and it replaces the prior separation agreement, the tax treatment of alimony depends on whether the payments are made under the original 2018 separation agreement or under the new 2023 divorce decree:
    • Payments under the 2018 separation agreement (not modified): Deductible by the payer.
    • Payments under the 2023 divorce decree: If the divorce decree is a new instrument executed after December 31, 2018, then alimony payments made under this new instrument are not deductible by the payer and not includible in the recipient’s income.
  • Transition from Separation to Divorce:
     If the 2023 divorce decree simply incorporates the terms of the 2018 separation agreement and does not materially modify the alimony provisions, the payments may continue to be treated under the old law (deductible/includible). However, if the divorce decree is a new instrument or materially modifies the terms, the new law applies (not deductible/not includible).

3. Examples from IRS Publications:

If a written separation agreement was executed before 2019 and a divorce decree is later issued that does not mention alimony, payments under the separation agreement remain deductible/includible.

If a divorce decree is executed after 2018 and replaces the separation agreement, payments under the new decree are not deductible/includible.

4. Conclusion

  • Alimony payments made under a legal separation agreement executed in 2018 are deductible by the payer (and includible by the recipient), as long as that agreement was not modified after 2018 to expressly adopt the new law.
  • If the 2023 divorce decree is a new instrument or materially modifies the alimony terms, then alimony payments made under the 2023 decree are not deductible by the payer (and not includible by the recipient).
  • If the 2023 divorce decree simply continues the terms of the 2018 separation agreement without material modification, the old law may continue to apply.

Careful review of the specific legal documents and any modifications is necessary to determine the correct tax treatment.

If you have more details about whether the 2023 divorce decree replaced or modified the 2018 separation agreement, please provide them for a more precise answer.

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