On Jan. 21, 2022, the Illinois Supreme Court held that the statute of limitations had not expired on a malpractice claim as time did not accrue until the trial court entered judgment.

Filing a breach of contract claim triggers the limitations period for a legal malpractice claim against the attorney who assisted in drafting the contract.

On February 21, 2014, the Illinois Supreme Court held that the time limits for claims against attorneys arising out of the performance of professional services apply to actions by non-clients, resolving a split among the districts of the appellate court.

An Illinois Appellate Court found that a prior court's resolution of an issue arising under federal patent law was sufficient to allow a state court to claim subject matter jurisdiction where there were no other remaining issues arising under federal patent law.

On November 10, 2009, the Illinois Appellate Court, First District, affirmed the decision of the Circuit Court of Cook County finding, in a legal malpractice suit, that the contingent fee arrangement between the parties was not void, and that jurisdiction over the malpractice claim rested exclusively with the federal courts. 

On August 20, 2008, the Illinois Appellate Court, First District, affirmed the judgment of the Circuit Court of Cook County finding that the defendant had committed legal malpractice.