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US Child Tax Credit Scenario Calculator — result sheet
Estimate a US-style child tax credit scenario with entered child count, credit amount, income phaseout, tax liability, and refundable limits.
Inputs used
Results
Visual chart
Breakdown
Calculation steps
Returned data table
Formula and methodology
Formula: Base credit = qualifying children × maximum per-child credit; phaseout reduction = ceiling(max(0, MAGI − threshold) ÷ increment) × reduction per increment; tentative credit = max(0, base credit − reduction); nonrefundable credit = min(tentative credit, tax liability); refundable credit = min(tentative credit − nonrefundable credit, children × refundable maximum, max(0, earned income − floor) × refundable rate).
This worksheet separates the credit before phaseout, the income reduction, the amount usable against tax, and a simplified refundable ceiling. The parameters are editable because credit amounts, thresholds, and eligibility rules are tied to a tax year and filing situation.
This result follows the calculator's declared inputs, precision, validation boundaries, and model limits.
Input contract
- Qualifying children in the scenario — children; minimum 0; maximum 100
- Maximum credit per child — currency units; minimum 0; maximum 1000000
- Adjusted gross income / MAGI — currency units; minimum 0; maximum 1000000000000000
- Phaseout threshold — currency units; minimum 0; maximum 1000000000000000
- Phaseout income increment — currency units; minimum 1.0E-6; maximum 1000000000000000
- Credit reduction per increment — currency units; minimum 0; maximum 1000000
- Tax liability before this credit — currency units; minimum 0; maximum 1000000000000000
- Earned income — currency units; minimum 0; maximum 1000000000000000
- Refundable maximum per child — currency units; minimum 0; maximum 1000000
- Refundable earned-income floor — currency units; minimum 0; maximum 1000000000000000
- Refundable earned-income rate — %; minimum 0; maximum 100
Worked example
| Input | Value |
|---|---|
| Qualifying children in the scenario | 2 |
| Maximum credit per child | 2200 |
| Adjusted gross income / MAGI | 100000 |
| Phaseout threshold | 200000 |
| Phaseout income increment | 1000 |
| Credit reduction per increment | 50 |
| Tax liability before this credit | 3000 |
| Earned income | 60000 |
| Refundable maximum per child | 1700 |
| Refundable earned-income floor | 2500 |
| Refundable earned-income rate | 15 |
The base credit and tentative credit are 4,400; 3,000 is usable against the entered tax liability and the remaining 1,400 is within the entered refundable limits, for 4,400 total in this scenario.
Assumptions and limits
- The entered children are assumed to satisfy the visitor’s qualifying-child test for the chosen scenario.
- The credit amount and thresholds are entered parameters for a selected tax year.
- Phaseout is modelled per entered increment and rounds a partial increment upward.
- Nonrefundable credit cannot exceed the entered tax liability.
- Refundable credit is limited to the remaining tentative credit.
- Refundable credit is also limited by the entered per-child maximum.
- The refundable earned-income line uses the entered floor and rate.
- Filing status, valid identification numbers, residency, support, and dependency tests are not determined.
- Other credits, alternative minimum tax, withholding, and refund timing are excluded.
- IRS instructions and the applicable tax year control over this educational scenario.
Calculator note
Source and methodology
Use the official WorldCalculate methodology policy for the source, formula, precision, and boundary standards behind this calculator.
Planning estimate, not financial, medical, legal, or professional advice. © WorldCalculate — reuse with attribution. Built and curated by Hassan ALRowaie.
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