The $20,000 plumbing contractor bond in Illinois
What does the Illinois plumbing contractor bond cover and how is it filed?
A self-employed plumber registering in Illinois
A plumber going out alone in Illinois registers as a plumbing contractor with the Department of Public Health, files a $20,000 bond on the Department's own form, and attaches a certificate of insurance with four state-set limits.
The scenario has a shape worth naming first: the state licenses you, the plumber, and registers the business you work through. A sole proprietorship's owner must be the licensed plumber. An LLC's Plumber of Record must be a manager or member. The registration fee is $150 a year, and the whole registration expires September 30 of the current year.
That two-sided setup is why the paperwork here is thicker than most trades'. The full fleet-wide order of operations is the get bonded and insured guide; this page stays inside the plumbing program.
$150The IDPH plumbing registration fee is $150 annually, expires September 30, and a sole proprietorship's owner must be the licensed plumber. — Illinois Department of Public Health, plumbing contractor application, retrieved 2026-09-29
What the bond says it pays
Read the bond form's own words before treating it as any kind of cover. It pays to correct plumbing that broke the code, for the public, up to $20,000.
The form binds the contractor and a surety licensed in Illinois "jointly and severally" to the Director of the Department of Public Health as obligee, in the sum of $20,000. During the term, the principal and surety pay "the amount needed to correct noncomplying plumbing work," for people injured or suffering financial loss by failure to comply with the Illinois Plumbing Code.
Two consequences follow a self-employed plumber directly. The surety's payment comes back to you — that is the joint and several promise. And the form adds that if $20,000 is too small to correct all the noncomplying work, exhausting the bond does not relieve the principal of liability for correcting it. The cap is the surety's, not yours. How a claim on it actually unfolds is the bond claim guide.
$20,000The Illinois plumbing bond binds contractor and surety jointly and severally to IDPH's Director in $20,000, to correct noncomplying plumbing work. — Illinois Department of Public Health, sole proprietor plumbing contractor surety bond form, retrieved 2026-09-29
The Illinois plumbing contractor bond form states that exhaustion of the bond does not relieve the principal of liability for correcting noncomplying plumbing work. — Illinois Department of Public Health, sole proprietor plumbing contractor surety bond form, retrieved 2026-09-29
The registration paperwork around the bond
The bond is one attachment of several. The application lists the rest, and the Department's checklist refuses the file without them.
The Plumber of Record's plumbing license copy must be valid for at least 60 days after the registration is issued. A Chicago-licensed plumber forwards a copy of the renewed Chicago license to the Department within 15 days of renewal. The certificate of insurance must show $100,000 general liability, $300,000 bodily injury, $50,000 property damage and $500,000 workers' compensation per occurrence, name the Department as certificate holder, refuse binders and continuous certificates, and carry written notice of any cancellation at least 30 days ahead.
The bond itself must be on the Department's form, must expire September 30 of the current year, cannot be a continuous bond, needs original signatures, and the principal's name must exactly match the business name on the application. Cross-outs, white-outs and riders are not accepted.
| Item | What the Department requires |
|---|---|
| Registration fee | $150 annually, non-refundable |
| Plumber's license copy | Valid at least 60 days after registration issues |
| Certificate of insurance | $100,000 / $300,000 / $50,000 / $500,000 limits, IDPH as holder |
| Surety bond | $20,000 on the Department's form, expiring September 30 |
| No-employee forms | Affidavit of No Employees, and the opt-out form if incorporated |
60 daysThe Plumber of Record's license must be valid at least 60 days after registration issues, and the certificate names IDPH as holder with 30 days' cancellation notice. — Illinois Department of Public Health, plumbing contractor application, retrieved 2026-09-29
September 30 bondThe IDPH registration requires the $20,000 bond on the Department's form, expiring September 30, not continuous, with original signatures and no riders accepted. — Illinois Department of Public Health, plumbing contractor application, retrieved 2026-09-29
Sole proprietorship, partnership or LLC
The ownership type decides which bond form the surety signs, and who has to be the licensed plumber inside the entity.
A sole proprietorship's owner is the plumber. A partnership's Plumber of Record is one of the partners — and if a partner is an apprentice, a notarized partnership agreement rides along. A corporation or LLC lists the entity exactly as filed with the Secretary of State, with its registered agent, and the Plumber of Record is an officer or a manager or member.
The bond forms split the same four ways: sole proprietor, partnership, corporation and LLC, each in the same $20,000. The WC paperwork splits with them, on the opt-out form's three parts. The arithmetic never moves with the structure — only the forms do. The whole comparison is the structure page.
ownership rulesThe application requires the Plumber of Record to be the sole owner, a partner, an officer, or a manager or member, with formation documents attached for a new corporation or LLC. — Illinois Department of Public Health, plumbing contractor application, retrieved 2026-09-29
Employees: the affidavit or the policy
The plumbing program asks the employee question up front, and the answer changes the certificate.
Any employees — clerical, janitorial, plumbers, anyone on wages reportable on a W-2 — mean a $500,000 workers' compensation line on the certificate of insurance. No employees mean the notarized Affidavit of No Employees, with the opt-out form behind it if the business is a corporation, partnership or LLC.
For a plumber working alone, that is the difference between one policy and one signature. The details of both routes, including what the opt-out excludes, are the workers' comp exemption page.
$500,000 or affidavitThe IDPH application requires $500,000 workers' compensation coverage on the certificate if there are employees, or the notarized Affidavit of No Employees if there are none. — Illinois Department of Public Health, plumbing contractor application, retrieved 2026-09-29
The September 30 clock
Everything in this program expires on the same day: the registration, the bond, and by extension the certificate's matching paperwork. September 30 of the current year.
The renewal fee is $150, and a late or reinstated registration adds $100. A returned check adds $200. The registration is non-transferable on an ownership change, and the Department must be notified within 15 days of a change in structure, name, location, or the owner who is the licensed plumber.
The sharpest edge of the calendar is the suspension rule. A registration whose certificate of insurance lapses is suspended, and while it is suspended the contractor's apprentices lose time — the application says so in as many words. Renew the certificate before the old one expires, not after the reminder arrives. What the whole year costs, premium included, is on the bonding costs page.
September 30The IDPH plumbing registration expires September 30, with a $150 renewal fee and a $100 late fee, and is suspended when a renewed certificate is not filed in time. — Illinois Department of Public Health, plumbing contractor application, retrieved 2026-09-29
What the bond is not
The bond is not your insurance and not your licence to skip a policy. It answers noncomplying work, and only that.
It does not pay for a client's burst pipe as an accident — that is general liability's job, on the certificate the same registration demands. It does not cover your own tools, your van, or an injury to you — none of those are in the bond's condition or the policy behind the certificate. It is not errors and omissions cover for a misdiagnosed job either; what covers whose mistakes is separated carefully on the bond versus insurance page.
The practical order for a plumber starting alone: register, buy the bond on the Department's form, buy the liability policy at the four limits, answer the employee question honestly, and calendar September 30 before the first job is booked. The certificate guide covers the last document in the stack.
what liability does not coverERGO NEXT's general liability description excludes the insured's own property, injuries to the insured or employees, professional mistakes, business vehicles and cyber attacks. — ERGO NEXT general liability insurance page, retrieved 2026-09-29
Questions
Can I file a letter of credit instead of the bond?
Yes. The application accepts a letter of credit in the same $20,000 amount as the bond, naming the Department as beneficiary. A bank letter of credit ties up banking credit rather than paying a surety premium, which is the real trade-off.
Does my bond cover work my apprentice does?
It covers plumbing performed under your supervision, which is the form's own scope: persons authorized to perform plumbing under the principal's supervision. The apprentice's time itself depends on your registration staying valid — a suspended registration stops their hours counting.
I hold a Chicago plumbing license. Does that count?
Yes, with a condition: the applicant forwards a copy of the plumber's license to the Department, noting the registered contractor's name, within 15 days after the Chicago license is renewed. Chicago-licensed plumbers also show four hours of approved continuing education taken after October 1 of the renewal year.
Is the bond premium part of the $150 fee?
No. The $150 goes to the Department. The premium goes to whatever bond company writes the $20,000 bond — typically 1% to 4% of the bond amount with strong credit, so roughly $200 to $800 a year, on the published Illinois rates.