Yes — if you’re married filing separately, you can claim the Child Tax Credit. The per-child amount and the qualifying-child tests are identical to every other filing status: up to $2,200 per qualifying child for the 2025 tax year.1Office of the Law Revision Counsel. 26 USC 24 – Child Tax Credit What changes is the income phase-out, which starts at half the joint threshold, and the fact that separate filers are shut out of the Earned Income Tax Credit entirely. Those are the tradeoffs worth weighing before you commit to the status.
What MFS Filers Get Under the Credit
The 2025 credit is $2,200 per qualifying child, set in federal law, and it applies whether you file jointly, separately, as head of household, or as a single filer.1Office of the Law Revision Counsel. 26 USC 24 – Child Tax Credit Starting in 2026, that base is adjusted annually for inflation and rounded down to the nearest $100.
The credit is nonrefundable up to the full $2,200. That means it can wipe out your tax bill but won’t, on its own, produce a refund. A separate refundable piece, the Additional Child Tax Credit, can generate a refund if your liability is too low to use the full amount. Separate filers get the ACTC on the same terms as everyone else, covered further down.
Qualifying Child Tests
A child has to pass every one of these tests, and the tests do not change because you file separately.2Internal Revenue Service. Child Tax Credit The child must be your son, daughter, stepchild, foster child, or a descendant of any of them (a grandchild counts). The child must be under 17 at the end of the tax year, must have lived with you in the United States for more than half the year, and cannot have provided more than half of their own support. The child needs a valid Social Security Number issued before the return’s due date, including extensions.1Office of the Law Revision Counsel. 26 USC 24 – Child Tax Credit And the child cannot file a joint return of their own, except to claim a refund of withholding.
Only one parent can claim any given child in a given year. If both spouses file separately and both list the same child, the IRS applies tiebreakers: the credit goes to the parent the child lived with longer during the year, and if the time was equal, to the parent with the higher adjusted gross income.3Internal Revenue Service. Publication 501 (2025), Dependents, Standard Deduction, and Filing Information Coordinate this before you file. An IRS examination that resolves it for you is far more expensive than a conversation.
The Phase-Out Hits Separate Filers Harder
The credit starts shrinking once your modified adjusted gross income crosses a threshold that depends on filing status. For Married Filing Separately, the threshold is $200,000. Joint filers don’t hit their phase-out until $400,000. For every $1,000 above the threshold, or any fraction of $1,000, the credit drops by $50.1Office of the Law Revision Counsel. 26 USC 24 – Child Tax Credit
The practical effect is what stings. A couple earning $300,000 combined keeps the full credit on a joint return. On separate returns, if one spouse’s individual income clears $200,000, that spouse’s credit starts phasing down. For a single qualifying child, the credit zeros out at $244,000 of income for a separate filer and $444,000 for a joint filer. The gap widens with each additional child.
Modified adjusted gross income here is your AGI plus any excluded foreign earned income or foreign housing costs. Without foreign income exclusions, modified AGI matches your regular AGI.
What You Give Up by Filing Separately
The Child Tax Credit survives MFS. The Earned Income Tax Credit does not. Choosing Married Filing Separately disqualifies you from the EITC completely, and for lower- and middle-income families that loss can outweigh whatever tax savings prompted the separate return in the first place.
The refundable Additional Child Tax Credit, on the other hand, is available. If your tax liability is too small to absorb the full $2,200, up to $1,700 per qualifying child can come back to you as a refund for 2025.4Internal Revenue Service. Refundable Tax Credits You need at least $2,500 of earned income to qualify. The refundable amount is 15% of your earned income above that $2,500 floor, capped at $1,700 per child.2Internal Revenue Service. Child Tax Credit Federal law also blocks the IRS from issuing refunds that include the ACTC before mid-February, so early filers who claim it should expect to check status by late February.5Internal Revenue Service. When to Expect Your Refund if You Claimed the Earned Income Tax Credit or Additional Child Tax Credit
Check Whether Head of Household Is Open to You
Before you file MFS, run one test. If you and your spouse are living apart, the IRS may treat you as unmarried for filing purposes. Three conditions have to be true: your spouse did not live in your home during the last six months of the tax year, you paid more than half the cost of keeping up your home, and a qualifying dependent child lived with you for more than half the year.6Internal Revenue Service. Filing Taxes After Divorce or Separation
If you meet all three, you can file as Head of Household. That status gives you a larger standard deduction, better brackets, and, importantly, restores your access to the Earned Income Tax Credit. The Child Tax Credit phase-out threshold is still $200,000 under Head of Household, but recovering the EITC alone is often worth thousands. If the conditions fit, this beats MFS almost every time.
How to Claim It on Your Return
Claim the credit on Form 1040 (or Form 1040-SR if you’re 65 or older). In the Dependents section, list each qualifying child by name and Social Security Number and check the “Child tax credit” box for each one.7Internal Revenue Service. Instructions for Schedule 8812 (Form 1040) (2025)
Attach Schedule 8812 (Credits for Qualifying Children and Other Dependents). This schedule runs the phase-out math against your income, figures out how much of the credit is refundable through the ACTC, and computes the Credit for Other Dependents if any of your dependents don’t qualify for the full CTC.2Internal Revenue Service. Child Tax Credit Both forms are on IRS.gov and are handled by the major tax software packages.
The Cost of Claiming a Child Who Doesn’t Qualify
If the IRS finds you filed an excessive claim for a credit or refund, it can assess a penalty of 20% of the excessive amount.8Internal Revenue Service. Erroneous Claim for Refund or Credit Worse consequences follow if the IRS decides you were careless or dishonest. Reckless or intentional disregard of the rules can trigger a two-year ban from claiming the Child Tax Credit, and a fraudulent claim carries a ten-year ban.9Taxpayer Advocate Service. Erroneously Claiming Certain Refundable Tax Credits Could Lead to Being Banned From Claiming the Credits During a ban, the credit is off the table even in later years when a child clearly qualifies. That risk is one more reason for separated spouses to settle in advance who claims which child.