Divorce and Taxes: Filing Status, the Kids, the House, the 401(k)

Your filing status is fixed by December 31

The IRS looks at your marital status on the last day of the year and applies it to the whole return. Divorced by December 31? You file Single, or Head of Household if you paid more than half the cost of a home that housed a qualifying child for more than half the year. Still married on December 31? You normally file MFJ or MFS — and MFS usually costs more — but you can file Head of Household if you're "considered unmarried": you file separately, your spouse didn't live in your home during the last 6 months of the year, you paid more than half the cost of keeping up the home, and it was the main home of your child for more than half the year (a child you can claim, or could claim except that you released the claim to the other parent on Form 8332).

A decree signed December 30 changes the whole return. A decree signed January 2 leaves you married for the prior year. Some couples deliberately slow-walk or rush the final decree for this reason — talk to your attorney if timing is flexible.

Alimony — the rule most online content still gets wrong

Child support has never been deductible and is never income — full stop, both pre- and post-TCJA. If a settlement labels a payment as "family support" without breaking out the child-support component, the IRS can treat the whole thing as unallocated child support and deny alimony treatment even on a pre-2019 agreement.

The kids: Form 8332 releases the dependency claim and its credits — not HoH, the EITC or dependent care

This is the #1 misunderstood rule in post-divorce tax planning. The custodial parent — the one with more overnights (with exactly equal nights, the parent with the higher AGI) — claims the child by default. They can release the claim to the child as a dependent to the noncustodial parent by signing Form 8332 (or a similar statement); the noncustodial parent attaches a copy to each return that relies on it. The release carries the child tax credit, additional child tax credit or credit for other dependents (Pub 501), and education credits such as the American opportunity credit follow whoever claims the dependent (Pub 970).

What Form 8332 does not transfer:

• Head of Household — IRC §2(b) requires the child physically live with you more than half the year. Cannot be waived.
• Earned Income Tax Credit — IRC §32(c)(3) uses the same residence test.
• Child and Dependent Care Credit — IRC §21(e)(5) explicitly assigns it to the custodial parent even when the noncustodial parent has the exemption.

A common bad outcome: the noncustodial parent has the higher income and negotiates the CTC in the decree — then claims HoH filing status too. That's a math error the IRS will catch, and the custodial parent loses tens of thousands of dollars of tax benefits by mistake. See the checker above.

The house: two §121 exclusions, and the moved-out-spouse nugget

Each ex-spouse gets their own $250,000 IRC §121 home-sale exclusion. If you and your ex sell the marital home as part of the divorce, that's $500,000 total of gain excluded — same as a married couple filing jointly.

Transferring the house between spouses — or to a former spouse incident to the divorce — is non-taxable under IRC §1041. A transfer to a former spouse counts as incident to the divorce if it happens within 1 year after the marriage ends, or if it's made under the divorce or separation instrument within 6 years after the marriage ends; a later transfer (or one not required by the instrument) is presumed unrelated unless you show it carried out the division of property you owned when the marriage ended. No gain, no loss, no recognition. The receiving spouse takes the transferor's basis — carryover, not stepped-up — and their holding period tacks. That matters when the receiving spouse eventually sells: their gain is measured from the original joint basis, not from the divorce-date value.

Retirement: QDRO vs IRA — the penalty asymmetry

401(k)s, 403(b)s, and pensions split via a Qualified Domestic Relations Order (QDRO) — a court order the plan administrator must approve. The distribution to the "alternate payee" under a QDRO is one of the enumerated exceptions to the 10% early-withdrawal penalty under IRC §72(t)(2)(C). The alternate payee can take cash at any age with no penalty (income tax still applies), or roll it into an IRA to preserve tax deferral. QDROs work only for qualified plans — never for IRAs.

IRAs split by "transfer incident to divorce" under IRC §408(d)(6). The retitle from one spouse's IRA to the other's is tax-free at the moment of transfer. But once the money is in the recipient's IRA, ordinary IRA rules apply — no 10% penalty exception on withdrawals before 59½. The recipient has to wait, use a §72(t) SEPP schedule, or eat the penalty.

Practical implication: if the divorcing spouse under 59½ needs liquidity now, splitting the qualified-plan portion (not the IRA portion) and cashing out under the QDRO exception is the cheaper move.

What's NOT deductible

• Legal fees for the divorce. TCJA suspended miscellaneous itemized deductions and Congress made the suspension permanent. Even fees specifically allocated to tax-advice work on the divorce are no longer deductible.
• Child support. Never — see above.
• Post-2018 alimony. Not to the payer.

The joint-liability paragraph

Joint returns you already filed create joint and several liability — the IRS can collect the entire tax, interest, and penalties from either spouse regardless of who earned the income or made the errors. If your ex understated income or claimed items you didn't know about, innocent-spouse relief exists under IRC §6015 — you request it on Form 8857. For innocent-spouse relief or separation of liability, file no later than 2 years after the IRS first began collection activity against you; equitable relief has a longer window (while the IRS can still collect the tax, generally 10 years from assessment, or within the refund-claim period if you want money back). This is a real remedy but a hard one to win; if it applies, work with a tax professional.

Frequently asked questions