Wisconsin Child Support Calculator

How Wisconsin calculates child support

Our record puts Wisconsin on the Percentage of Income Model, though nobody here has read Wisconsin's own guideline to check it, which means a fixed percentage set by the number of children is applied to the paying parent's income alone. Here is what that looks like in practice.

The Percentage of Income Model skips the combined-income step entirely. A fixed percentage, set by the number of children being supported, is applied to the paying parent's income on its own. The receiving parent's earnings do not enter the arithmetic. That makes the guideline figure far easier to predict in advance, and it is the reason two families with identical total income can end up with very different orders depending on which parent earns what.

The trade-off is that the model is blind to the other side of the household. A paying parent whose former spouse out-earns them by a wide margin arrives at the same guideline number as one supporting a parent with no income at all. Courts hold the discretion to depart from the guideline figure when the result does not fit the family, and a large income disparity in the receiving parent's favor is one of the situations where a departure gets argued.

Credits still apply on top of the percentage. Health insurance premiums for the children reduce the obligation, as does support already ordered for children from an earlier relationship. Where the state's guideline accounts for parenting time, substantial time with the paying parent reduces it further.

What moves a Wisconsin order

• The paying parent's income (the receiving parent's income is not part of the formula)
• Number of children covered by the order
• Parenting time, in most states, under a rule we have not yet verified for this one
• Health insurance paid for the children
• Support already ordered for children from another relationship

Income limits and judicial discretion

We hold no income ceiling for Wisconsin. What Wisconsin's own guideline does at the top of its schedule is a question this site has not answered for this state. Courts hold authority to depart from a guideline figure when it produces an amount that does not match what the children actually need. Wisconsin gives judges a moderate amount of room on custody and parenting time, so the final order moves with the facts of the case as well as with the arithmetic.

No child support estimate for Wisconsin

We have withdrawn our Wisconsin child support estimate rather than serve a figure we believe is wrong.

We are not showing you a child support figure for Wisconsin, and this is what sits behind that. Until recently this page ran on 17 percent of gross income for one child, 25 for two, 29 for three, 31 for four and 34 for five or more, applied at every income. We now have good reason to believe that is wrong.

Here is what we found, and one thing about it first, because it changes how much weight to put on the rest. We found it through a search index rather than by reading Wisconsin's guideline. Every legal figure on this site is read out of the document that carries it, and this is not, which is why it is written here as something we found rather than published as something we calculate.

Wis. Admin. Code § DCF 150.035(2) is bracketed. Those rates apply to the first $7,000 of monthly income, then 14/20/23/25/27 to $12,500, then 10/15/17/19/20 above it. A flat rate is correct only inside the first bracket. Above $7,000 it overstates every payer, and the overstatement widens with income.

Knowing a figure is wrong is reason enough to stop showing it. It is not reason enough to show you a replacement nobody here has read, so we are doing the first and not the second.

If you need a Wisconsin figure now, Wis. Admin. Code ch. DCF 150, the percentage standard the Department of Children and Families issues is what carries it, and a Wisconsin family law attorney or the state's own child support agency can run your figures against it. We will publish Wisconsin here once we have read the guideline ourselves, to the same standard as every other state on this site.

How parenting time changes support in Wisconsin

Most states do reduce support when the paying parent has the children a substantial share of the year. What differs between them is not just where the line sits. It is whether there is a line at all, and whether crossing it switches the worksheet, nudges the arithmetic, or does nothing. We apply a state's parenting-time adjustment only once we have verified that state's own rule and built the mechanism behind it, and Wisconsin is not there yet.

Four mechanisms are in use across the country, and they are not variations on one idea. The first is a cliff. Support is worked out one way below a set number of overnights and a different way at or above it, so the figure steps rather than slides. North Carolina is the clearest example and the first one our calculator computes in full, from the state's own published schedule. Its guidelines, adopted under N.C. Gen. Stat. § 50-13.4(c1), send a case to Worksheet B at 123 overnights a year, roughly 34 percent of the calendar. At 122 nights the standard worksheet applies. At 123 a different one does, and the same family can come out several hundred dollars apart on either side of that single night.

Where the line sits is not a national figure, and that is worth seeing rather than being told. Illinois runs the same kind of cliff and, for a calculation before January 1, 2027, puts it 23 nights further along: under 750 ILCS 5/505(a)(3.8) the shared care route applies where each parent exercises 146 or more overnights a year, and the basic obligation is multiplied by 1.5. We compute Illinois too. So under that rule the same family, with the same schedule, gets the adjustment in North Carolina and misses it in Illinois anywhere between 123 and 145 nights. From January 1, 2027, Illinois' Public Act 104-0733 moves its line down to 110 and adds an adjustment below 146, which the Illinois page sets out. The exact wording matters as much as the number: both of those thresholds are inclusive, so a parent sitting exactly on one qualifies, while other states word the same rule as "more than", which excludes them.

The part of a cliff rule that catches parents out is that both of them have to clear the threshold, not only the one asking for the adjustment. Work that through and the result is genuinely counter-intuitive. A parent with 250 overnights leaves the other parent 115, which sits below a 123-night bar, so the case is not shared custody under the rule at all and the shared worksheet never comes out. Getting well past an even split can cost you the adjustment an even split would have given you. If you are negotiating toward a particular number of nights, check what the schedule leaves the other parent, not only what it gives you.

The second mechanism has no line in it. Some states apply a parenting-time offset across the whole range, from the first overnight that can be determined, so every additional night moves the number a little and there is no threshold to reach. Michigan is the verified example and the second state our calculator computes in full. Under 2025 Michigan Child Support Formula Manual § 3.03 the offset applies to every support determination, so a Michigan parent with five overnights a year gets one. Guides that report a single trigger figure for a state like this are usually pointing at one of two things that are not triggers: the place where the curve steepens, which is a property of the arithmetic, or a rule about something else entirely. The 21 overnights often quoted for Michigan are the second kind. That figure governs when a change in parenting time is enough to ask a court to modify an existing order, and it has nothing to do with how the offset is worked out.

The third is no adjustment at all. Texas is the plain case: Tex. Fam. Code § 154.125 runs on the paying parent's net resources and the number of children, and the state's own official calculator has no field for overnights. Possession time reaches a Texas order only as one of the factors a court may weigh in deciding whether to depart from the guideline figure, under Tex. Fam. Code § 154.123(b)(4), and a departure can move the order in either direction.

The fourth is a formula the legislature wrote out. Georgia's parenting time adjustment became mandatory on January 1, 2026 under O.C.G.A. § 19-6-15(g), which directs the court to apply a set calculation to the noncustodial parent's basic obligation wherever a court-ordered parenting time schedule exists. That is a required step inside the presumptive calculation, not an argument made after the guideline figure is settled.

Those four produce very different answers for the same family, which is why we are not applying a general rule to Wisconsin in the meantime. We used to. The threshold we applied was 146 nights, which is Illinois's statutory number generalised to all fifty, the size of the reduction had no legal source anywhere, and neither survived being checked, so both are gone rather than defaulted. What replaces them is each state's own rule, one state at a time, and that work has started. North Carolina's page calculates from North Carolina's published schedule and applies North Carolina's own threshold. Michigan's computes Michigan's own equations and applies an offset with no threshold at all. Illinois's reads a banded schedule keyed to net income and applies its own parenting-time rule: a 146-night cliff for a calculation before January 1, 2027, and Public Act 104-0733's 110-overnight rule from that date. Those three were done in that order on purpose: the second is the opposite mechanism to the first, and the third shares a mechanism with the first while differing from it on every number in it. We will publish Wisconsin's parenting-time adjustment here once we have read it out of Wisconsin's own guidelines to the same standard. Until then Wisconsin's official child support worksheet, linked below, is where the adjusted number comes from.

Where Wisconsin starts on parenting time

Wisconsin does not presume equal parenting time. That is our own record rather than Wisconsin's own custody law. Courts decide the schedule on the best interests of the children, so the overnight count is established case by case rather than assumed. Parents who expect substantial time should treat it as something to be negotiated deliberately, and should find out what Wisconsin's own guidelines do with the count they end up with before agreeing to it.

Getting a child support order in Wisconsin

The guideline figure is only half the picture. When the order actually arrives, and what it costs to argue about it, vary quite a bit from state to state, and both shape what a family lives on in the meantime.

Residency required, in our record

6 months

Waiting period, in our record

4 months

Uncontested, our estimate

5 months

Contested, our estimate

about 1.0 years

Support before the case is finished

Our record has 6 months of residency in Wisconsin before you can file, and a waiting period of 4 months that has to run before a judge can finalize the divorce. States measure that period from different starting points, some from filing, some from service on your spouse, and some from the date the two of you separated, so confirm where Wisconsin's clock begins. On our own estimates, a contested case in Wisconsin runs about 1.0 years, against 5 months when the parents agree. That gap is why temporary support matters. A judge can enter a temporary order early in the case, calculated on the same guideline, so the children are covered while the rest of the case is worked out. If money is tight now, a temporary order is usually the fastest relief available, and waiting for the final judgment can mean months without support.

What it costs to contest the number

On our own figures, family law attorneys in Wisconsin run $200 to $375 an hour, and mediation costs roughly $225 a session. Worth doing the arithmetic before digging in: a handful of billable hours on each side can cost more than a full year of the amount being argued over. Where the disagreement is genuinely large, or where one parent's income is hard to pin down, representation earns its keep. Where the gap between the two positions is a few dozen dollars a month, mediation or a negotiated agreement almost always leaves both households better off. Our record carries collaborative divorce as available in all fifty states, so it says nothing specific about Wisconsin; whether trained collaborative attorneys practise near you is a local question. Where it is on offer, both parents commit in writing to settle without litigation and use shared financial experts rather than competing ones.

Changing or enforcing a Wisconsin order

Modifying an existing order

A child support order is not permanent, but it also does not adjust on its own. Either parent can ask the court to recalculate, and the general standard across states is a substantial and continuing change in circumstances since the last order. Job loss, a significant raise, a change in the parenting schedule, a new child support obligation for another child, and a change in the children's medical or childcare costs are the changes that most often qualify.

Two points catch parents out. The first is that a modification usually takes effect from the date the request is filed, not the date the circumstances changed, so waiting to file means absorbing the gap. The second is that the obligation continues in full until a judge signs a new order. An informal agreement between parents to pay less does not bind the court, and arrears can still accrue against the paying parent for the difference.

Enforcement

Enforcement runs through Wisconsin's child support agency as well as the courts. Federal law requires every state to run a child support enforcement program with a common set of tools, which is why the remedies look broadly similar from state to state: income withholding straight from wages, interception of federal and state tax refunds, reporting to credit bureaus, suspension of driver's and professional licenses, liens against property, and contempt proceedings for willful non-payment. Income withholding is the default for new orders in most cases rather than a penalty applied after a missed payment.

Wisconsin guideline authority and official worksheet

Data pending verification. We have not yet verified, from an official copy, the specific statute or court rule that carries Wisconsin's child support guideline, so we are not naming one here. Take the controlling text and the official worksheet from Wisconsin's own courts. The citations listed under Sources at the foot of this page are what our record carries, and listing one there is not a check of it.

Where to get the official worksheet

Every state publishes a child support worksheet or an official calculator, and that document is what a judge or the state agency works from. We do not yet have a verified direct link to Wisconsin's worksheet, so the starting points below are the state's own court site and the federal directory of state child support agencies rather than a deep link we cannot vouch for.

• Wisconsin courts , the state judiciary site from our Wisconsin source record.
• Office of Child Support Services, U.S. Administration for Children and Families, which maintains the directory of state child support agencies.
• National Conference of State Legislatures, child support guideline models by state, which publishes its own comparison of the guideline model each state uses, so you can check ours against it.

How we calculate this estimate

This page does not produce a child support figure for your state, and the panel above sets out why in full. The short version: a guideline figure on this site is read out of the state's own published guideline, and nobody here has read yours yet. What we were showing until recently was built by us to stand in for it, and we would rather show you nothing than show you that.

What this page does instead for Wisconsin

• It sets out what your state's guideline is recorded as doing, and says plainly which parts of that record somebody has checked against a document and which parts nobody has.
• It says what we were previously calculating, and what we found when we looked at it. That finding is the part you can use, whether or not we ever publish a figure here.
• It points at the document that carries the real answer where we can name one, and says so where we cannot rather than sending you to a citation nobody here has opened.
• Nothing on this page is a dollar amount for your family. The other calculators on this site still run for your state, and the filing fees and waiting periods on your state page are unaffected by any of this.

Where to get the real number

Your state's own worksheet is the controlling document, and it is the thing to work from. A licensed family law attorney in your state, or your state's child support agency, can run your figures against it and tell you what a court would be starting from.

Read the full methodology for how every calculator on the site is built.

Sources

Wisconsin courts and statutes

Citations our record carries for Wisconsin. Being listed here does not mean a figure on this page was read from it.

• wicourts.gov
• Wis. Admin. Code § DCF 150.035(2)

Where to read more

Background reading. No number on this page is taken from any of these.

• National Conference of State Legislatures, child support guideline models by state
• Office of Child Support Services, U.S. Administration for Children and Families
• American Bar Association, Section of Family Law

About this page

Written by Barron Hansen

I am an app developer who is dedicated to building the highest-value, most accurate web apps possible, that people want to use every day.