In Oak Brook, the Support Formulas Often Stop Applying
Illinois calculates spousal maintenance with a guideline formula, but only when the spouses together earn less than $500,000 a year. Above that line there is no formula at all. A judge sets maintenance from the statutory factors, starting with the standard of living the marriage established, and a math problem becomes an evidence problem. In Oak Brook that line comes up often enough that it is worth understanding before anyone makes a first offer. Most Oak Brook divorces are filed in the Eighteenth Judicial Circuit and heard at the DuPage County Judicial Center in Wheaton, a short drive west.
Kulerski & Cornelison is a divorce and family law firm in Oakbrook Terrace, next door to Oak Brook. Kari L. Cornelison has practiced Illinois family law since 1996. She is a court-certified mediator, a trained collaborative lawyer, and an attorney who has tried contested family cases in DuPage County. Those three usually describe three different lawyers. Having done all of it is what makes it possible to say what staying out of court is actually worth in your case.
Why Oak Brook Clients Work With Us
This firm was built around resolving cases outside a courtroom. That is the practice itself, not a service line held back for clients who think to ask, and it changes what the first meeting is about.
The same few things come up every time:
How Illinois Family Law Applies to an Oak Brook Case
Illinois has been a no-fault state since 2016. Irreconcilable differences is the only ground, and under 750 ILCS 5/401(a-5), living separate and apart for six months conclusively establishes it. Most Oak Brook cases are heard in Wheaton. A small part of the village lies in Cook County, and because venue under 750 ILCS 5/104 follows either spouse’s residence, a case from that side can end up at the Daley Center instead. After that, a handful of statutes do most of the work.
The provisions that decide most cases:
Spousal Maintenance
Governed by 750 ILCS 5/504. Below $500,000 in combined gross income, the guideline is one third of the payor’s net income minus a quarter of the recipient’s, capped so the recipient never ends up with more than 40% of the couple’s combined net. Above that line, the court weighs the statutory factors instead, and the marital standard of living carries real weight.
Property Division
Marital property is divided equitably under 750 ILCS 5/503, which is not the same as equally. Inheritances, gifts and assets owned before the marriage start out non-marital, but years of mixing them with joint money can change that, and the spouse claiming the exception has to prove it by clear and convincing evidence.
Child Support
Built on the income shares model in 750 ILCS 5/505, using both parents’ net incomes and the overnight count. A shared parenting adjustment applies once each parent has at least 146 overnights. At the top of the income range, the argument usually shifts to what the children reasonably need and have been used to.
Parental Responsibilities and Parenting Time
Allocated under 750 ILCS 5/602.5 and 602.7, with a parenting plan due within 120 days of service. Oak Brook children attend Butler District 53, Hinsdale District 181 or Salt Creek District 48, which feed two different high school districts, so where each parent lives afterward can decide which schools the children attend.
Relocation and Modifications
A move of more than 25 miles from a DuPage residence requires notice and, if contested, court approval under 750 ILCS 5/609.2. Support can be modified later on a substantial change in circumstances, which for executive pay often means a new role, a severance package or a bonus structure that did not exist when the judgment was entered.
Understanding this at the outset is worth real money. Most of the expensive disputes we see started as a misunderstanding about what the law actually required.
In Many Oak Brook Cases, the Real Argument Is the Standard of Living
When the maintenance formula does not apply, the question becomes what the marriage actually cost to live. That means the house, the club dues, the travel, the tuition, the cars and the help, documented from bank and card statements rather than remembered. A spouse who ran the household finances starts with an advantage that has nothing to do with the merits, and closing that gap early is most of the work. The same record drives the property division. A closely held business, a family partnership or real estate titled in more than one name each needs a value both sides can accept, and a valuation built by one side alone rarely survives the other side’s expert. Mediation and collaborative divorce keep this work in a conference room instead of an open courtroom, which matters to clients who would rather their finances not become a topic of conversation at work or at the club.
What We Handle for Oak Brook Clients
We work across the full range of Illinois family law, with the emphasis on resolving matters without a trial wherever the case allows it. Mediation, collaborative divorce, cooperative divorce and one-lawyer divorce are the normal routes here rather than alternatives held in reserve. When a case does have to be litigated, it is handled by an attorney who has actually tried family law cases in DuPage and Cook County.
Where to Start
The earliest choices in a divorce shape everything downstream, and most of them get made before anyone has taken legal advice. A single conversation now is usually the cheapest hour of the whole case.
Common Situations Oak Brook Families Bring Us
The presenting problem is rarely the actual problem. An argument about a Wednesday overnight is usually an argument about something else, and naming that early tends to shorten the case.
A combined income above $500,000 and no agreement on what the marriage actually spent
One parent staying in Oak Brook while the other moves into a different school district
An inheritance or a family business that was supposed to stay separate and did not
A spouse who will not engage with the process at all
An order that a new role, a severance package or a move has made unworkable
Each one has a legal answer and a practical answer. Part of the job is telling you when those are different.
How We Work
The route matters more than the argument. Most of the gap between a four month divorce and a two year one is decided at the start, not in a courtroom.
We start with your situation, not your paperwork
What you want the result to look like, and what your spouse is realistically going to do. The second answer shapes everything after it.
We pick a route and price it honestly
Mediation, collaborative, cooperative, one-lawyer or traditional. Each asks something different of you, and some of those demands are uncomfortable enough that clients would rather hear about them now than in month six.
We build the financial record before anyone negotiates
Income, accounts, retirement, the house, the debt. Getting this right at the start is what stops a settlement unraveling two years later.
We document it so it holds
The marital settlement agreement and parenting plan, written to be read years from now by two people who no longer talk much, without a lawyer needed to interpret them.
We will also tell you when your position will not survive contact with a judge. Early, in a meeting that costs a fraction of what a failed hearing would.
Serving Oak Brook and the Surrounding Communities
Our office is in Oakbrook Terrace, next door to Oak Brook. We represent clients throughout DuPage County and into Cook County, including Hinsdale, Clarendon Hills, Westmont, Downers Grove, Elmhurst, Villa Park, Lombard, Wheaton and Naperville. Every DuPage case is heard in the same courthouse in Wheaton, so your address inside the county changes the drive far more than it changes the case.
Meet Attorney Kari L. Cornelison
Kari has practiced family law in the Chicago area since 1996. She is a court-certified mediator, a trained collaborative practitioner, and a divorce litigator with years of trial work in the DuPage and Cook County courts behind her. The trial experience is deliberate rather than incidental. Lawyers who only ever settle tend to overvalue settlement, and lawyers who only ever litigate tend to undervalue it. Having done both, she can tell an Oak Brook client what a judge in Wheaton is likely to do with a particular set of facts, then leave it to the client to decide whether the offer on the table beats that. Her practice is built around keeping families out of court wherever it is possible, not because litigation never has a place, but because she has watched what a contested divorce does to people and to their children.
What Our Clients Say
“Kari made a stressful process easier to manage. She explained everything clearly and always kept my family’s needs first.”
Contact Our DuPage County Family Law Office
Whether you are still weighing the decision or your spouse has already filed, the choices made early shape the ones left later. Call our Oakbrook Terrace office at (630) 928-0600 or send us a message to arrange a consultation.
