How Long Does the City of Chicago Take to Pay Vendors?

Start with the honest answer, because it is not the one most vendors expect.

The City of Chicago does not publish a target or average number of days to pay a vendor invoice. There is no service-level commitment on the Department of Finance's vendor pages, and no published average days-to-pay figure. What exists instead is a statutory clock, a specific processing route your invoice has to travel, and a set of conditions that stop the clock without anyone telling you.

That is a less satisfying answer than "Chicago pays in X days," but it is the accurate one, and knowing the mechanism is worth more than knowing an average. Most Chicago payment delays are not the City deciding to pay late. They are an invoice that never became payable in the first place.

The legal clock: 60 days, in two halves

Chicago is a municipality, and Illinois municipalities are governed by the Local Government Prompt Payment Act, 50 ILCS 505. This is a different statute from the State Prompt Payment Act (30 ILCS 540) that governs State of Illinois agencies, and the difference catches out a lot of vendors.

One point of confusion worth clearing immediately. The 60 days below is the local act's 30-to-approve plus 30-to-pay, and it is current law for Chicago. It is not the same as the "60 days" people often quote for State invoices — that figure comes from a paragraph of the State act that has been superseded since fiscal year 2012, where the operative trigger is now 90 days. Two different statutes, two different clocks, one coincidental number.

The Act sets two consecutive 30-day periods:

• Section 3 — approval. The local government official or agency receiving the goods or services "must approve or disapprove a bill from a vendor or contractor for goods or services furnished the local governmental agency within 30 days after the receipt of such bill or within 30 days after the date on which the goods or services were received, whichever is later." If a bill is disapproved, "written notice shall be mailed to the vendor or contractor immediately."
• Section 4 — payment. "Any bill approved for payment pursuant to Section 3 shall be paid within 30 days after the date of approval." Past that, "an interest penalty of 1% of any amount approved and unpaid shall be added for each month or fraction thereof."

So the statutory default is 30 days to approve plus 30 days to pay — 60 days total, with 1% per month accruing after that.

Two qualifications matter, and both cut against a naive reading.

Section 5 closes the do-nothing loophole. If the responsible official simply never approves or disapproves the bill, the late-payment penalty "shall be computed from the date 60 days after the receipt of that bill or the date 60 days after the goods or services are received, whichever is later." Silence does not stop the clock indefinitely.

Section 6 lets a contract lengthen it. The time periods in Sections 3, 4 and 5 "are superseded by any greater time periods as agreed to by the local government agency and the particular vendor or contractor." Read your contract. The statute is the floor, not a ceiling, and a negotiated longer term displaces it.

Where your invoice actually goes

Since April 18, 2011, Chicago has run Centralized Invoice Processing (CIP). For eligible contracts, invoices go directly to the Office of the City Comptroller rather than to the department that ordered the work. The City's own vendor FAQ is blunt that this is not a choice: "CIP is not optional, and there are no approved alternative processes."

Eligibility is by purchase order, not by vendor. The City publishes a reference list of eligible contracts, updated monthly, with contracts remaining listed for six months past expiration. If your PO is not on that list — or you are supplying without a contract — the FAQ is explicit: "your invoice is not eligible for centralized invoice processing. You should continue to submit your invoice to the ordering department as you do today."

For CIP-eligible invoices, the FAQ gives the billing address: "'Bill To' can be changed to 'Invoices, Office of the City Comptroller, 33 N. LaSalle St., Room 700, Chicago IL 60602'." Invoices may be submitted by mail or as email attachments. Do not send a hard copy on top of an email, and do not copy the ordering department — the FAQ specifically says you should not be "submitting duplicate invoice copies to ANY City department."

The Receipt number is the thing that delays you

If there is one operational fact worth taking from this page, it is this one.

A CIP invoice needs a Release number and a Receipt number. The Receipt is not something you generate. Per the FAQ, "The Receipt number will be provided to you by the department that ordered and to whom you delivered goods and/or services," and it "is generated only after you deliver goods or services, and will document the actual quantities received by the ordering department."

The City's guidance to vendors is to invoice only after that number exists: "You should generate an invoice only after the City provides a Receipt number, and your invoice should include BOTH the Release and Receipt numbers in order to receive fastest-possible payment." And on the consequence of omitting it: "If the Receipt number is not included, invoice payment will be delayed."

Departments were directed to communicate Receipt numbers to vendors, but the FAQ concedes the channel varies — "USPS mail, email or phone" — and advises vendors to ask their ordering contact how that department handles it.

There is a documented fallback when the number never arrives:

"If you have not received a Receipt number within 5 business days of delivery, send your invoice to the CIP unit with the notation 'TBD – Department' in the RECEIPT NUMBER field. While your payment will be delayed, we will work with the department on your behalf to get a Receipt number and to prevent further problems."

That is worth doing rather than waiting silently. It gets the invoice into the system, dated, with the City on notice.

Other avoidable delays

Three more come straight from the City's own instructions:

1. Past-due amounts on a new invoice. Keep current charges and past-due charges on separate invoices.
2. Subcontractor Certification forms sent to CIP. The FAQ says "DO NOT submit Subcontractor Certification forms to the CIP unit. CIP will not enter the information into the accounting system." Ask the ordering department whether they still want them.
3. Invoicing before the department has entered a Release. Where quantities vary, departments are supposed to create estimated Releases in advance and Receipts on delivery. If they create the Release after your invoice arrives, the FAQ says plainly that this is not acceptable practice — but it is your payment that waits.

How to check status, in the right order

The City splits this into two steps, and calling the wrong number first is a wasted morning. From the Department of Finance's Vendor Payment Inquiries page:

"The Payment Operations division audits, approves and pays vendors once the contractual obligations have been fulfilled and the vendor payment has been approved and processed by the originating city department. General inquiries regarding payment status should be directed to the originating department which contracted the service of the vendor. The originating department will be able to supply the vendor with their payment voucher number, which identifies the payment being processed."

So:

1. Call the ordering department first and get the payment voucher number.
2. Then call Vendor Payment Inquiries at 312.744.3233, Monday through Friday, 8:30 am to 4:30 pm. Per the same page, vendors "who have the payment voucher number may direct inquiries related to payment status and lost or late payments" to that line.

For invoice status specifically — as opposed to payment status — the CIP FAQ says you may contact "either the department that ordered your goods and/or services OR the Comptroller's Office."

Two adjacent things worth knowing. Stop-payment requests go in writing to the originating department, not to Finance. And direct deposit enrollment takes about two weeks: the form goes to ElectronicEnrollment@cityofchicago.org with a bank confirmation letter on the depository's letterhead, and the City states processing time is approximately two weeks. Enrol before you need it, not when you are chasing a payment.

Completed and processed payments are searchable through the City's Vendor, Contract and Payment Search.

A realistic picture

Putting the pieces together: the statute gives 60 days from a properly received bill, your contract may lawfully give the City longer, and the clock in practice starts when a complete invoice — with its Release and Receipt numbers — reaches the right destination. A vendor who invoices on delivery without a Receipt number has not started a 60-day clock. They have started a conversation.

We are not going to publish an average days-to-pay figure for Chicago, because we could not find one from a primary source and inventing one would be worse than leaving the gap. What we can say with confidence is that the avoidable half of the delay is documented by the City itself, in the FAQ quoted throughout this page.

Where GoVendor fits

GoVendor is building tooling for exactly this problem: helping government vendors submit clean, complete invoices the first time and see where each one stands. If your working capital gap is caused by a 60-day statutory clock rather than a rejected invoice, that is a financing question rather than a paperwork one — and the honest first step is still the checklist above, because no financing product improves an invoice that was never payable. Nothing on this page describes a relationship with, or endorsement by, the City of Chicago or any other body named here.

Sources

• Local Government Prompt Payment Act, 50 ILCS 505 — Illinois General Assembly
• City of Chicago — Centralized Invoice Processing Initiative, Vendor FAQ (PDF)
• City of Chicago — Centralized Invoice Processing
• City of Chicago — Vendor Payment Inquiries
• City of Chicago — Vendor, Contract and Payment Search

Statutes and City guidance were read on 6 August 2026. Contract terms vary and can lawfully lengthen the statutory periods described here; this page is general information, not legal advice.