CTC, ODC, and ACTC: Three Limits in One Estimate

A row identified as a qualifying child for CTC/ACTC is checked against submitted age, work-eligible SSN, U.S. status, dependency confirmations, taxpayer identification, competing-claim, and custody-review facts. An ODC row uses its own submitted TIN and category facts.

The tool trusts confirmations; it does not resolve residency, relationship, support, joint-return, tie-breaker, divorced-parent, or identification disputes.

Eligible CTC children and ODC dependents create separate potential amounts under the project’s 2026 constants. The combined amount then faces the filing-status MAGI threshold.

Excess MAGI is rounded up in $1,000 units for the modeled $50-per-unit reduction. A tiny amount over the threshold can therefore reduce the credit by a full $50.

Two families can each have one screened CTC child and the same potential amount. One may use it against available tax liability, while another with lower liability may depend on ACTC capacity. The dependent count alone does not determine the modeled benefit.

The calculator estimates federal tax before credits from taxable ordinary income, qualified dividends, and net long-term gain, then subtracts other nonrefundable credits to find liability available for CTC and ODC.

The nonrefundable dependent credit cannot reduce that available amount below zero. Unused credit is not automatically refundable.

For eligible CTC children, the model applies its 2026 earned-income threshold, 15% formula, refundable per-child cap, unused-credit limit, and submitted Form 2555 and identification facts. The alternative method is used only when explicitly selected with its required payroll-tax inputs.

ODC does not become ACTC. The combined benefit is nonrefundable CTC/ODC plus modeled ACTC, with any remainder shown as unavailable in this estimate.