Divorced Taxpayers and the Shared Policy Allocation on Form 8962

When a married couple purchases coverage through the ACA Marketplace and then divorces or legally separates during the year, they face a tax filing complication that surprises most people: both former spouses must file a Form 8962 reconciling the shared marketplace policy, and they must coordinate on how to allocate the shared numbers. The IRS calls this a "Shared Policy Allocation" — governed by Treas. Reg. § 1.36B-4(b)(2) and the Form 8962 instructions — and getting it wrong can result in one or both ex-spouses owing back more APTC than expected or claiming less PTC than they are entitled to.

The problem arises because the Marketplace issued one Form 1095-A covering the shared policy. That form lists the full enrollment premium, the SLCSP benchmark premium, and the total APTC paid. But after divorce, the two ex-spouses file separate returns — either Single or Head of Household — and each must separately compute their own PTC on Form 8962. Each computation needs a "their share" of the enrollment premium, SLCSP, and APTC. The Form 8962 Part IV (Shared Policy Allocation) requires both taxpayers to report the same allocation percentage — if you say 60%, your ex must report 40%. A mismatch triggers IRS correspondence and potential delays in both refunds.

Under Treas. Reg. § 1.36B-4, the parties may agree on any allocation percentage between 0% and 100%. The agreement does not need to be in writing or filed with the IRS — it just needs to be consistent on both Form 8962 filings. If the parties cannot agree (or if one party files without coordinating), the default allocation under the regulation is 50/50: each former spouse receives half the enrollment premium, half the SLCSP, and half the APTC from the shared policy. The 50/50 default rarely produces the optimal outcome for either party, because the post-divorce MAGI, household size, and applicable percentage differ between the two taxpayers.

Consider why this matters: a negotiated allocation can shift PTC value from the higher-income ex-spouse (who needs the credit less) to the lower-income ex-spouse (who needs it more). Suppose the shared household MAGI was $90,000 (both filing jointly), which placed them above the 400% FPL cliff for the household of two. After divorce, one ex-spouse earns $30,000 (200% FPL, single) and the other earns $65,000 (415% FPL, single). The low-income ex-spouse is now eligible for PTC; the high-income ex-spouse is not. A 100% allocation of the APTC and SLCSP to the low-income ex-spouse might maximize PTC use, while the high-income ex-spouse accepts a higher repayment obligation. Whether this is the right deal depends on the full divorce financial settlement — APTC allocation is one of many levers being negotiated.

For the year of divorce, both the divorce decree date and the coverage dates matter. The shared policy allocation covers only the months both individuals were covered under the shared policy. Once coverage terminates for one party (e.g., the non-subscriber leaves the plan and enrolls in their own marketplace plan), the shared-policy period ends and each party files for their own coverage months. The allocation percentage applies to the full months of shared enrollment — it is not computed month-by-month with different percentages per month unless the parties are comfortable with a complex filing.

Practically: the divorce attorney should flag the Form 8962 allocation issue to both parties no later than the fall of the divorce year. By October, both parties need to know (1) what their projected year-end MAGI will be, (2) how the Form 8962 allocation will be handled, and (3) whether one party should obtain separate marketplace coverage effective January 1 of the following year. The IRS has issued specific guidance in the Form 8962 instructions for "Allocation Situation 1" (divorce or legal separation during the year), which is the starting point for any tax professional handling this situation.

The shared-policy allocation under Treas. Reg. § 1.36B-4(b)(2) is one of only a handful of tax positions where two unrelated taxpayers must file consistent numbers on their separate returns. The IRS cross-matches the two Form 8962 Part IV filings by TIN. If the percentages reported by the two ex-spouses do not sum to 100%, the IRS will apply the 50/50 default — potentially generating CP notices for both filers.

The "shifting enrollee" concept in the regulation refers to individuals covered by the shared policy who belong to a different tax household from the policy subscriber. For a divorcing couple where both adults were enrolled, both are shifting enrollees relative to each other's post-divorce filing. If children remain in one parent's household, they are shifting enrollees from the perspective of the other parent's return.

The allocation must cover the full months of shared enrollment — it is not computed month-by-month. A couple that shared coverage January through June (when one spouse enrolled in separate coverage effective July 1) allocates the January-June APTC and premiums using Part IV of Form 8962, and each reports their own July-December data on their own 1095-A independently.

For households where the ex-spouses have dramatically different MAGI post-divorce — one in PTC territory, one over the cliff — a 100% allocation to the PTC-eligible party often minimizes combined tax cost. The PTC-eligible party gets the full SLCSP credit and any residual APTC credit; the over-cliff party accepts the full APTC repayment (which may be limited by the § 36B(f)(2)(B) recapture cap if their MAGI is still below certain thresholds). Run the numbers before the divorce is finalized.