Child Support Calculator for All 50 States (2026)

The Child Support Calculator gives you a free 2026 estimate of monthly child support for any state. Enter both parents' incomes and the parenting-time split, and the tool applies your state's guideline model to show roughly what you may owe or receive. It is built for self-represented parents who want a realistic number before mediation, a hearing, or a settlement talk.

States use different formulas. Most follow the income shares model, which combines both parents' incomes and divides the support obligation by share of income. A smaller group uses the percentage of obligor income model, which bases support mainly on the paying parent's income. A few use other approaches. The calculator picks the right model for the state you choose so the estimate matches how your court actually works.

Several things change the final number: each parent's income, the number of children, the parenting-time or overnight split, and add-ons like health insurance, work-related child care, and certain extraordinary expenses. Because guidelines update and judges can deviate for good cause, treat the result as a well-grounded estimate, not the exact order a court will enter.

When you have an estimate, you can fine-tune the inputs, save your numbers, and move on to building a parenting plan or a court document. For a deeper, state-specific breakdown with the governing statute, open your state's dedicated calculator page. This tool is self-help information, not legal advice, and the official guideline worksheet for your state controls.

Frequently asked questions

How is child support calculated?

Most states use the income shares model, which combines both parents' incomes and splits the support obligation by each parent's share. Some states base it mainly on the paying parent's income. Parenting time, the number of children, health insurance, and child care also affect the amount.

Is this child support estimate accurate?

It is a close, guideline-based estimate using your state's model. The exact order depends on verified income, allowed add-ons, and your judge, who can deviate for good cause, so use it to plan rather than as a final figure.

Does parenting time lower child support?

In many states more overnights with the paying parent can reduce the amount, but the threshold and formula vary by state. Some states adjust gradually, others only past a set number of overnights.

What income counts for child support?

Most states count gross income from nearly all sources, including wages, self-employment, bonuses, and some benefits. Courts can also impute income to a parent who is voluntarily unemployed or underemployed.

Can child support be changed later?

Yes. Support can usually be modified when there is a substantial change, such as a large income change or a change in the parenting schedule. You file a request with the court to review the amount.

Is the calculator free?

Yes. You can run an estimate for any state for free and adjust the inputs as many times as you need.