Illinois has a generous small-estate threshold of $150,000. Estates under that line can use the Small Estate Affidavit procedure, which is a form rather than a court case — most families can handle it without an attorney. For estates above the threshold, formal probate generally benefits from counsel because of the procedural overhead, even when nothing is contested. The Illinois probate calculator estimates total costs based on estate value.

In Illinois, the situations where retaining counsel is typically worth the cost are: blended families with children from prior relationships; ownership of a business, rental property, or significant investment assets; special-needs dependents who need a special-needs trust to preserve benefits; estates near or above the Illinois estate tax threshold; substantial property held in multiple states. If none of these describe your situation, the simpler online and DIY tools are often enough.

Start by filtering the directory above by your county and the practice area you need. Look for firms with experience in your specific situation — board certifications in estate planning, trust, or probate law are a strong signal. Most Illinois estate planning attorneys offer an initial consultation; some are free, others charge a flat fee. Ask up front whether the firm bills by the hour or by flat-fee package, and what the expected cost is for your situation.