Child Support Estimate
Estimate monthly child support using a percentage-of-income guideline.
About Child Support Estimate
Many courts estimate support as a percentage of combined income that rises with the number of children. Dividing the annual estimate by twelve gives the monthly obligation. This is a rough guideline; actual orders vary by jurisdiction and custody arrangement, so treat it as an estimate only.
Formula
Child Support Estimate
Monthly support = income x guideline% / 12
- guideline
- common percentage applied by number of children
Worked example
With the default values below, Child Support Estimate returns Monthly Support of $20.83. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Annual income
- 75,000
- Other income
- 25,000
- Number of childrenaccepts 1–5
- 2
Results
- Monthly Support
- $20.83
- Annual Support
- $250.00
- Support Percent
- 25.00%
Step by step
- 1Values used
- 2Child Support Estimate
- 3Monthly Support= 20.83
- 4Annual Support= 250.00
- 5Support Percent= 25.00
Assumptions and limits
- The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax or fees or charges into account.
- Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
- Estimate only. Actual support is set by a court based on jurisdiction-specific guidelines and individual circumstances.
- This is an estimate for general information and not professional financial, tax or legal advice. See the full disclaimer for the limits that apply to this kind of calculator.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Estimate only. Actual support is set by a court based on jurisdiction-specific guidelines and individual circumstances.
Frequently Asked Questions
How is Child Support Estimate calculated?
Monthly support = income x guideline% / 12 Many courts estimate support as a percentage of combined income that rises with the number of children. Dividing the annual estimate by twelve gives the monthly obligation.
Why does Child Support Estimate matter?
This is a rough guideline; actual orders vary by jurisdiction and custody arrangement, so treat it as an estimate only.
What values do I need to enter?
This calculator takes 3 inputs: Annual income, Other income, Number of children. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.