Medical Debt Statute of Limitations in Illinois

Last verified 2026-07 · Source: 735 ILCS 5/13-205 ✓ verified · 3 sources

The deadline

5 years

from Date of last service or date of first missed payment (default), under 735 ILCS 5/13-205.

Illinois law sets a hard deadline of 5 years to sue over unpaid medical bills. The controlling statute is 735 ILCS 5/13-205, and the clock generally starts on Date of last service or date of first missed payment (default). Below: exactly when that clock starts, the exceptions that can pause it, and the traps that shorten it.

Illinois Deadlines for Related Claims

Claim type	Deadline	Statute
Medical Debt	5 years	735 ILCS 5/13-205
Car Accident	2 yrs	735 ILCS 5/13-202
Credit Card Debt	5 yrs	735 ILCS 5/13-205
Medical Malpractice	2 yrs	735 ILCS 5/13-212(a)
Wrongful Death	2 yrs	740 ILCS 180/2
Personal Injury	2 yrs	735 Ill. Comp. Stat. § 5/13-202
Dog Bite	2 yrs	510 ILCS 5/16 (Animal Control Act, strict liability); SOL: 735 ILCS 5/13-202
Slip and Fall	2 yrs	735 ILCS 5/13-202
Defamation	1 yr	735 ILCS 5/13-201
Breach of Contract	10 yrs	735 ILCS 5/13-206

When the Clock Starts

In Illinois, the limitations period for medical debt collection generally begins on Date of last service or date of first missed payment (default). Illinois does not apply a general discovery rule to this claim type — the date of the event controls, which makes early action critical.

Exceptions That Can Extend the Deadline

Minors: the clock is generally paused while the injured person is under 18.
Fraudulent concealment: if the defendant actively hid the wrongdoing, the deadline may be extended until it was or should have been uncovered.
Defendant leaves the state: absence can pause the clock in many circumstances.

Medical bills in Illinois are typically treated as unwritten/implied contracts subject to the 5-year period under § 13-205. If a signed written financial agreement exists (common with hospital admissions), 735 ILCS 5/13-206 may apply providing a 10-year limitation. Illinois courts have gone both ways; the 5-year period is the most commonly cited for medical debt collection.

Source: 735 ILCS 5/13-205, official Illinois statute · verified 2026-07

What to Do Before the Deadline Runs

Pin down your accrual date — the day the clock started — and calendar the deadline conservatively.
Preserve evidence now: photos, records, witness contacts, bills. Evidence decays faster than deadlines.
Send preservation/notice letters where required (especially for Illinois government defendants).
If the deadline is inside 6 months, treat it as urgent — filing suit is the only reliable way to stop the clock.

How Illinois Compares to Nearby States

State	Deadline	Statute
Illinois	5 years	735 ILCS 5/13-205
Wisconsin	6 yrs	Wis. Stat. § 893.43
Iowa	5 yrs	Iowa Code § 614.1(4)
Missouri	5 yrs	RSMo § 516.120
Kentucky	10 yrs	KRS § 413.160
Indiana	6 yrs	Ind. Code § 34-11-2-9

Frequently Asked Questions

How long do I have to sue over unpaid medical bills in Illinois?

You have 5 years from Date of last service or date of first missed payment (default), under 735 ILCS 5/13-205.

Can I still sue after 5 years in Illinois?

Usually no — courts dismiss claims filed after the statute of limitations expires. Narrow exceptions (tolling for minors, fraudulent concealment) can extend the deadline; whether one applies depends on your facts.

What if the victim was a minor?

Illinois generally pauses ("tolls") the deadline while the injured person is under 18, giving them time to file after reaching adulthood. Special limits can still apply, so check the statute.

Sources

Official 735 ILCS 5/13-205 — Five-Year Limitation on Unwritten Contracts (Illinois General Assembly)
Corroborating 735 ILCS 5/ Article XIII — Limitations of Actions (Justia)
Corroborating 735 ILCS 5/13-205 — FindLaw
Verified 2026-07 under our 4-step process — every line checked against the sources above. How we verify

This page is legal information, not legal advice. Deadlines have exceptions that depend on your facts — confirm with a licensed Illinois attorney.