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Child support wage withholding by state

Compare an existing support amount across payment frequencies, or choose a state calculator to estimate a withholding ceiling. These are different calculations; the income withholding order controls actual payroll deductions.

Reviewed by SupportDecode Editorial Team Page content reviewed Sources Methodology Update log

Plan around your pay schedule

Child support payment frequency converter

A monthly order is not four weekly payments. For example, $700 a month has a budgeting equivalent of $323.08 every two weeks or $350 twice a month.

Use an amount already stated in your order, not your income.

Enter an existing support amount to see the equivalent and its formula.

Estimate only. The court or state agency calculation controls. This does not determine support, arrears, fees, a withholding limit, or the deduction an employer must make. Inputs stay in this page and are not saved.

Need the worked math? Read biweekly versus semimonthly child support for rounding, three-paycheck months, and a $700 monthly example.

Every two weeks is not twice a month

This tool annualizes using 52 weekly, 26 biweekly, 24 semimonthly, or 12 monthly periods. It does not count actual pay dates. Years with an extra weekly or biweekly payday need separate reconciliation.

For an actual paycheck deduction

Use the amounts and frequencies in the income withholding order. Current support, arrears and fees can be separate items. A state ceiling is a limit, not the amount automatically withheld.

Find the state withholding ceiling calculator

Reference: Iowa Child Support's payment-frequency worksheet. Reviewed September 15, 2026. The period conversion is arithmetic; state withholding rules are separate.

Choose your state

Every jurisdiction page shows its own assumptions, effective date, review date, and official source list. Select the state connected to the order or case.

Start from the situation

If you are not sure which tool comes next, use the situation guide for a short, connected path through the relevant calculator, guide, and official source.

Understanding wage withholding