Every tax season, co-parents across the country run into the same question: who gets to claim the children? The answer is not always the parent who assumes they qualify. IRS rules around divorced and separated parents are specific, and making the wrong assumption can result in a rejected return, an audit, or a significant unexpected tax bill.
The Custodial Parent Rule
By default, the IRS grants the right to claim a child as a dependent to the custodial parent — defined as the parent with whom the child lived for the greater number of nights during the tax year. This is determined by the calendar, not by the custody order's language. If there is a true 50/50 split with an equal number of overnights, the parent with the higher adjusted gross income gets the default claim.
This default can be overridden in two ways: by the terms of a divorce decree signed before 2009 that specifically allocates the exemption, or by using IRS Form 8332. Without one of these mechanisms, the non-custodial parent cannot legally claim the child — even if the divorce agreement says they can.
Form 8332 and Alternating Years
Form 8332 is the IRS's official mechanism for a custodial parent to release the dependency exemption to the non-custodial parent. It can be signed for a single year or multiple years at once. The non-custodial parent attaches it to their return; the custodial parent retains a copy. If the custodial parent later wants to revoke the release for future years, they file a revocation — but it cannot be applied retroactively.
Many co-parents negotiate alternating years in their divorce decree: one parent claims the child in even tax years, the other in odd years. This is perfectly legal, but it must be executed properly via Form 8332 each applicable year.
Child Tax Credit and the EITC
The Child Tax Credit follows the dependency claim — whoever claims the child gets the credit, up to $2,000 per qualifying child. The Earned Income Tax Credit (EITC), however, is different: it always goes to the custodial parent and cannot be transferred via Form 8332, regardless of what the divorce decree says. This distinction catches many co-parents by surprise.
Before finalizing any tax arrangement, consult a CPA or enrolled agent experienced in divorced-parent tax situations. The difference in your refund — or tax liability — can be thousands of dollars.
Coordinating finances between two households is complicated enough without tax surprises. CoParent.Help (https://www.coparent.help) includes tools for tracking shared expenses and financial agreements, giving both parents a clear record when tax season — or any financial dispute — arises.
Source: CoParent.Help