Practice AreasÂ
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Divorce & Separation
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High-Asset Divorce
High-Asset Property Divorce
Attorney in Illinois
As an Illinois high-asset divorce attorney, I see this regularly: when significant wealth is involved, the stakes of a poorly negotiated divorce are measured not in months but in decades. Complex marital estates require a different level of preparation — and an attorney who knows what to look for before opposing counsel does.
The mistakes don't show up right away.
Illinois is an equitable distribution state — marital property is divided fairly, but not necessarily equally. In a straightforward divorce, that standard is relatively simple to apply. In a high-asset case, it's where the complexity begins.
The most consequential errors in complex divorce proceedings are rarely obvious at the time they're made. A business interest valued without proper methodology. A stock option package treated as income when it should have been characterized as an asset. A retirement account divided without a properly drafted QDRO, triggering taxes and penalties that erode the settlement years later. A non-marital asset commingled over a long marriage and never properly traced — lost because no one built the documentation to protect it.
Getting these things right requires preparation that begins well before negotiations start. It requires knowing what questions to ask, which experts to engage, and how Illinois courts approach each category of asset when the parties can't agree.
Under 750 ILCS 5/503, Illinois courts divide marital property based on factors including the length of the marriage, each spouse's economic circumstances, contributions to marital and non-marital property, and any valid prenuptial agreement. The standard is equitable, not equal — which means the outcome in a high-asset case is highly fact-dependent and influenced significantly by how well each side presents its position.
What makes a divorce complex.
High-asset divorce cases rarely involve just one complicated issue. More often, they involve several simultaneously — each requiring its own analysis, its own experts, and its own litigation strategy if the parties disagree.
Closely Held & Family Businesses
Valuing a privately held business is one of the most contested issues in high-asset divorce. The right valuation methodology — asset-based, income-based, or market-based — depends on the type of business and can produce dramatically different results. We work with qualified business valuators and understand how Illinois courts evaluate competing expert opinions.
Stock Options, RSUs & Deferred Compensation
Equity compensation packages are frequently mishandled in divorce. The marital portion of unvested stock options or RSUs must be calculated using the correct formula — and the characterization of deferred compensation as income versus asset has significant consequences for both property division and support calculations.
Retirement Accounts & Investment Portfolios
401(k)s, pensions, IRAs, and brokerage accounts each carry different tax implications and require different handling in divorce. Dividing retirement assets incorrectly — or without a properly drafted QDRO — can cost tens of thousands of dollars in taxes and penalties. Precision here is not optional.
Primary Residences, Investment & Vacation Properties
In high-asset cases, real estate portfolios often include properties with significant appreciation, complex ownership structures, or both marital and non-marital components. Whether to sell, transfer, or retain — and how to address embedded capital gains — requires careful analysis alongside overall settlement strategy.
Tracing & Protecting Pre-Marital Property
Assets owned before the marriage, or received as gifts or inheritance, are generally non-marital in Illinois — but only if properly traced and documented. Commingling over a long marriage can erode that protection. Building the documentation to defend a non-marital claim requires early, methodical work.
Discovery & Financial Transparency
In high-asset cases, the completeness of financial disclosure isn't always guaranteed. Income may be deferred, expenses inflated, or assets moved in anticipation of divorce. Formal discovery tools — subpoenas, depositions, forensic accounting — are sometimes necessary to ensure the marital estate is fully identified.
Our Approach
How we handle complex cases.
High-asset divorce is not simply a larger version of a standard divorce. It requires a different process — more thorough financial investigation, earlier engagement of experts, and a litigation strategy that anticipates where the real disputes will arise.
01
Complete Financial Picture First
Before we advise on strategy, we build a complete map of the marital estate. Understanding what exists — and how it's characterized — determines everything that follows.
02
Right Experts, Engaged Early
Business valuators, forensic accountants, real estate appraisers, and QDRO specialists are part of the team from the outset — not afterthoughts brought in at trial.
Litigation-Ready from Day One
We prepare every matter as if it will be tried. That posture changes how opposing counsel approaches the table and consistently produces better negotiated outcomes.
04
Tax Consequences in Every Decision
A settlement that looks balanced on paper can be significantly unequal after taxes. We analyze after-tax value — not face value — in every recommendation we make.
Non-Marital Asset Protection
If you have significant pre-marital assets or inherited wealth, protecting them requires documentation built early. We identify the tracing work needed at the outset.
What clients in complex cases ask most.
These are the questions prospective clients most often raise before their first consultation. We've answered them honestly — because informed clients make better decisions, and that's better for everyone.
How does Illinois divide a closely held business in divorce?
Are unvested stock options and RSUs marital property?
What happens if my spouse hid assets during the divorce?
Illinois courts take financial disclosure obligations seriously. If hidden assets are discovered during proceedings, we pursue them through formal discovery — subpoenas, depositions, and forensic accounting. If concealment is discovered after judgment, Illinois law allows a petition to reopen under 735 ILCS 5/2-1401, which permits courts to vacate judgments obtained through fraud or based on newly discovered evidence. Courts have significant discretion to sanction a spouse who deliberately concealed assets, including awarding a greater share of the discovered property to the other party.
How is spousal maintenance calculated in a high-asset case?
Illinois statutory maintenance guidelines under 750 ILCS 5/504 apply when combined gross income is $500,000 or less per year. Above that threshold, the court exercises broader discretion, considering the standard of living established during the marriage, each spouse's earning capacity, the duration of the marriage, and other factors. In high-income cases, maintenance awards can be substantial and long-term. We analyze maintenance exposure carefully at the outset and build strategy around realistic projections.
How do we divide retirement accounts without triggering taxes?
Does a prenuptial agreement hold up in Illinois?
Illinois prenuptial agreements are generally enforceable under the Illinois Uniform Premarital Agreement Act (750 ILCS 10/) — but can be challenged if the agreement was not entered voluntarily, if there was inadequate financial disclosure, or if it is unconscionable as applied. A valid prenuptial agreement protecting significant pre-marital wealth can dramatically change the analysis. We review it carefully at the outset — both to understand what it covers and to assess whether any basis for challenge exists.
High-Asset Divorce Attorney Serving Chicagoland
O'Brien Family Law represents clients in complex, high-net-worth divorce proceedings across Cook, DuPage, Kane, Kendall, Lake, and Will County. Many clients are executives, business owners, physicians, and professionals with significant marital estates that require careful, experienced handling.
Whether your case involves a business headquartered in Naperville, an executive compensation package tied to a company in Chicago, investment properties across DuPage County, or a pension earned over a long career — we have the experience to navigate the complexity and the local court knowledge to advocate effectively.
Complex cases need early counsel.
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