What Changes on Your Tax Return After a Divorce?

Filing status, dependents, shared assets, and records to gather during the transition.

Your marital status on a single night decides how the IRS sees you for an entire year, and that night is December 31. A final divorce decree signed on December 30 makes you an unmarried taxpayer for all twelve months of that year. The same decree signed on January 2 leaves you married for tax purposes for the year that just closed. Months of living apart, separate bank accounts, and a signed settlement agreement do not change that rule. Because so much of the tax result depends on dates, the first conversation about your return should happen well before a judge signs anything.

Filing status is set on December 31

The IRS follows your state's law to decide whether you are divorced. The test is whether you hold a final decree of divorce or separate maintenance by the last day of the tax year, as IRS Publication 504 explains. An interlocutory decree, which is a temporary order that is not final, does not count. If you are separated but the final decree has not been signed by December 31, you are treated as married for the whole year, and your choices are married filing jointly or married filing separately. Couples who divorce only to file as unmarried people and then remarry each other the following year must still file as married.

Once you are unmarried on December 31, your status is single or, if you qualify, head of household. The gap between those two shows up in the standard deduction. For the 2026 tax year, which applies to returns filed in 2027, the IRS announced $32,200 for married couples filing jointly, $16,100 for single filers, and $24,150 for heads of household. The matching 2025 amounts are $31,500, $15,750, and $23,625. A parent who qualifies as head of household in 2026 therefore deducts $8,050 more than a single filer with the same income, before any other benefit is counted.

Some people who are separated but not yet divorced choose to file separately so they are not responsible for a spouse's tax. That protects you from your spouse's return, but Publication 504 lists several costs. Rates are generally higher, the education credits and the student loan interest deduction are off the table, and your capital loss limit drops to $1,500 instead of $3,000. If your spouse itemizes, you cannot take the standard deduction. You can generally switch from separate returns to a joint return within three years of the due date, but you cannot switch from a joint return to separate returns after the due date, so run both versions of the numbers before you choose.

Head of household and who qualifies

Head of household is the status many divorced parents should look at first because it carries a larger standard deduction and lower tax rates than single. You must be unmarried or considered unmarried on the last day of the year. You must also pay more than half the cost of keeping up your home, and a qualifying person, usually your child, must live with you for more than half the year. School and other temporary absences still count as time at home.

A separated spouse can be considered unmarried even without a final decree. Publication 504 sets out the tests. You file a separate return, you pay more than half the cost of keeping up your home, and your spouse did not live in your home during the last six months of the year. Your home must also have been the main home of your child for more than half the year, and you must be able to claim that child, or be unable to claim the child only because the other parent can. Meeting all of these lets a person who is still legally married file as head of household.

The cost of keeping up a home is where many people lose track. The IRS counts rent, mortgage interest, property taxes, home insurance, repairs, utilities, and food eaten in the home. It does not count clothing, education, medical care, vacations, life insurance, or transportation. Keep a simple monthly record of what you paid for each category and what anyone else paid, because the "more than half" test is easy to meet on paper and hard to prove without records. Only one person can use a given child to claim head of household for the year, so the other parent cannot claim it for the same child.

Who claims the children

When parents live apart, the child is generally treated as living with the custodial parent, which is the parent with whom the child spent more nights during the year. Say your son spent 190 nights with you and 175 with his father. You are the custodial parent. If the nights are exactly equal, the parent with the higher adjusted gross income is the custodial parent, and the night of December 31 counts toward the year in which it begins. A night with a parent on vacation counts for that parent, and Publication 504 includes examples for summer camp and hospital stays. A calendar kept through the year settles most disputes before they start.

The custodial parent can release the claim to the noncustodial parent by signing Form 8332, and the noncustodial parent must attach it to the return every year the release applies. Publication 504 explains that if the decree or agreement took effect after 2008, attaching pages from the decree no longer works. The custodial parent must sign Form 8332 or a similar statement with no conditions, such as a requirement that child support be paid first. The release can cover one year, alternating years, or all future years. A custodial parent who wants to take a release back must give written notice, and it generally works only for a later year.

Signing Form 8332 moves only part of the package. The Child Tax Credit, the Additional Child Tax Credit, and the credit for other dependents go to the noncustodial parent. Head of household status, the child and dependent care credit, the exclusion for dependent care benefits, and the earned income credit stay with the custodial parent. The IRS Child Tax Credit page lists up to $2,200 per qualifying child for tax year 2025 and up to $1,700 of that as refundable. It requires a Social Security number valid for work for both the filer and each child. The credit begins to phase out above $200,000 of income for single and head of household filers, half the $400,000 joint threshold, so a high earner's credit can shrink after a divorce. If both parents claim the same child, the IRS sides with the parent who had the child longer, as Publication 504 shows in its examples.

Alimony and child support

Child support is not deductible by the parent who pays it and is not income to the parent who receives it. Alimony follows a date rule. For a divorce or separation instrument signed after 2018, Publication 504 says alimony is not deductible by the payer and is not income to the recipient. For an instrument signed on or before December 31, 2018, and not changed since, the payer deducts it and the recipient reports it as income. A later change to an older agreement can flip the treatment, but only if the change expressly adopts the newer rule.

For older agreements, the payer enters alimony on Schedule 1 of Form 1040, along with the recipient's Social Security number and the month and year of the original agreement. The recipient reports it on the income side of the same schedule and must give the payer a Social Security number. Either side can face a $50 penalty for leaving out the number. If the agreement calls for both child support and alimony and the payer falls short, Publication 504 treats the payments as child support first and alimony second. That ordering matters when a payer sends less than the full amount for several months.

Dividing property without a tax bill

Property that moves between spouses, or between former spouses as part of the divorce, generally triggers no gain or loss under Section 1041 of the tax code. The Treasury regulation, 26 CFR 1.1041-1T, says the person who receives the property takes the other spouse's adjusted basis, whether that basis is higher or lower than the current value. A transfer counts as part of the divorce when it happens within one year after the marriage ends, or within six years when it follows the divorce or separation instrument. Publication 504 also covers the gift tax treatment of property settlements, which generally exempts transfers made under a decree or written agreement.

The carryover basis is where equal splits turn out to be unequal. Picture two brokerage accounts worth $60,000 each. One cost $55,000 to build, and the other cost $20,000. If each were sold next month, the first would show a $5,000 gain and the second a $40,000 gain, even though the balances match. As Klasing & Associates points out, the person who takes the low basis asset inherits a tax bill the other person does not. Ask for the cost basis and purchase dates on every taxable account before you agree to a split.

The house

When one spouse gives the home, or a share of it, to the other as part of the settlement, Publication 523 treats it as no gain or loss. The tax question comes later, when someone sells. A homeowner can exclude up to $250,000 of gain on a main home, or $500,000 on a joint return, if the owner passes both tests in IRS Topic 701. The ownership test and the use test each require two of the last five years, and the two years do not have to be the same period. For a joint exclusion, either spouse can meet the ownership test, but both must meet the use test.

Timing therefore matters. A couple who sells while still married and files jointly may exclude up to $500,000. After the divorce, each former spouse who owned and used the home for the required time can generally exclude up to $250,000 on a separate return. A spouse who moves out starts a clock on the use test, although Publication 523 explains that use of the home granted to a spouse or former spouse under a divorce instrument can count for the spouse who moved out. If a sale has to happen before the two years are met, a divorce can qualify as an unforeseen circumstance that allows a partial exclusion. Whoever keeps the house also keeps the joint basis, so hold on to closing statements and improvement receipts.

Retirement accounts and Social Security

An employer plan such as a 401(k) is divided with a qualified domestic relations order, known as a QDRO. A court issues the order, and the plan administrator must approve it before any money moves. As CPA Practice Advisor explains, the person who receives the share, called the alternate payee, can roll it into her own IRA with no current tax or take it in cash and pay income tax on it. A cash distribution paid under a QDRO from an employer plan avoids the 10% early withdrawal tax even if the recipient is under age 59 and a half.

That exception has a trap. As IRAhelp.com notes, the QDRO exception does not follow the money into an IRA. If you roll the full share into an IRA and later withdraw cash before age 59 and a half, the 10% additional tax can apply. If you need some cash now, ask the plan to pay that portion directly to you under the QDRO and roll the remainder over. IRAs themselves are divided differently, by a direct transfer or retitling under the decree, which Publication 504 treats as a transfer incident to divorce and not a distribution.

Social Security has its own divorce rules. The Social Security Administration says you may collect benefits on a former spouse's record if the marriage lasted at least 10 years, you are unmarried, and you are 62 or older. You can apply even if your former spouse has not retired, provided you have been divorced for at least two years. Remarriage generally ends eligibility for a divorced spouse benefit. Anyone whose marriage is close to the ten year mark should have an attorney and a CPA check the dates before the decree is final.

Joint returns you already filed

A divorce decree does not rewrite your history with the IRS. Publication 504 states that you remain jointly and individually responsible for tax, interest, and penalties on a joint return filed for a year before the divorce, even if the decree assigns that debt to your former spouse. That means an audit notice or balance due for an old joint year can reach either of you. The IRS offers three kinds of relief, which are innocent spouse relief, separation of liability, and equitable relief, all requested on Form 8857. Publication 971 explains who qualifies.

A different problem arises when a joint refund is taken to pay a former spouse's past due debts, such as child support or a student loan. An injured spouse who is not responsible for that debt can request her share of the refund on Form 8379. The two forms are easy to confuse. Form 8857 asks to be released from liability for items on a joint return, and Form 8379 asks for a refund of your share of an overpayment. Pulling your IRS transcripts for the past few years shows what was filed, what was paid, and whether anything is open, and it costs nothing.

Withholding, health coverage, and your name

Your paycheck withholding was probably set for a household of two. Publication 504 states that if you had been claiming an allowance for your spouse, you must give your employer a new withholding certificate within 10 days after the divorce or legal separation. Even without that allowance, a new certificate keeps withholding in line with your new status, and the IRS Tax Withholding Estimator shows what to enter. If you made joint estimated tax payments earlier in the year, agree in writing on how they will be divided, since Publication 504 has a section on that.

If you buy coverage through the Health Insurance Marketplace, report the change in marital status, household size, and income when it happens. Publication 504 explains that if you divorce during the year while enrolled in the same plan, you and your former spouse must divide the policy amounts between your separate returns when figuring the premium tax credit on Form 8962. If you change your name, update it with the Social Security

Administration before you file, because the name on your return must match its records. A new mailing address goes to the IRS on Form 8822. The fees you pay to obtain the divorce are generally not deductible, and Publication 504 has a section on the costs of getting a divorce for the details.

Records to gather

Start with the paper that proves your tax history. Collect your last three years of joint returns, any IRS notices, amended returns, and copies of every Form 8332 signed or received. Publication 504 notes that a claim for refund generally must be filed within three years of the original return or two years after paying the tax, whichever is later, so three years of returns also covers the period when a correction is still possible. Download the matching transcripts from your online IRS account so you can compare them with what you hold.

Next, gather what you need to prove basis in property. That means the closing statement and improvement receipts for the home, cost basis reports from every brokerage account, purchase records for vehicles and valuables, and any records for a business interest, rental property, or cryptocurrency. Basis follows the asset into your hands, and the recipient is the one who has to prove it years later. Brokerage firms can usually produce a cost basis report on request, and it is easier to ask for it while both of you still cooperate.

Then collect the records tied to your children and your income. Keep a calendar of overnights, the school registration address, each child's Social Security number, and the name, address, and taxpayer identification number of any child care provider, since the dependent care credit requires them. For income, gather wage statements, Form 1099 reports, partnership and S corporation statements, rental records, and business financials. If either of you owns a business, the settlement may turn on its value, so ask for that documentation before the agreement is signed.

Finally, keep the legal documents themselves. Hold on to the final decree with its date, the settlement agreement, every QDRO, and any order covering support or the claim to the children. Pre-2019 alimony requires the month and year of the original agreement on the return, so that date matters as well. Add your retirement account statements, health savings account records, life insurance policies, and any Marketplace statement you received. A CPA who reads the settlement before the judge signs it can point out tax consequences that are much harder to fix afterward.