Getting Paid by Cook County: A Vendor's Guide

For a vendor, Cook County is a very different customer from the City of Chicago sitting inside it: different contract terms, a different accounts payable operation, a different route in. This page covers what governs payment, what the County's own records say about how well it meets that standard, and the contract language most vendors never read until something goes wrong.

The clock: 60 days, and the County says so itself

Cook County is a county, so it falls under the Local Government Prompt Payment Act, 50 ILCS 505 — not the State Prompt Payment Act that governs State of Illinois agencies.

You do not have to take an outside reading of that. The Office of the Cook County Auditor states it directly in its Vendor Payment Process audit report:

"Cook County is mandated to ensure that all invoices are to be paid within 60 days of the invoice date per the Local Government Prompt Payment Act - 50 ILCS 505."

The 60 days is two consecutive 30-day periods: Section 3 gives the receiving department 30 days to approve or disapprove the bill, running from receipt of the bill or of the goods and services, whichever is later; Section 4 gives 30 more days to pay after approval, after which 1% per month accrues on the approved and unpaid amount.

Do not confuse this 60 with the State's. The number people commonly quote for State of Illinois invoices also happens to be 60 days, but it comes from a paragraph of the State Prompt Payment Act that has been superseded since fiscal year 2012 — the operative State trigger is now 90 days. Cook County's 60 is the local act's, and it is current.

Section 6 of the Act allows a longer period where the County and the vendor have agreed one. Check your contract before assuming 60 days is your number.

What the County's own audit found

This is the part no national vendor-payment guide carries, and it is the most useful thing on this page.

The Cook County Auditor examined the vendor payment process and reported to the County Board on 18 April 2016. Finding #2 reads:

"Invoices are not being processed in the most efficient manner to ensure prompt payment. The Local Government Prompt Payment Act requires payment within 60 days. Invoices processed within the required 60 day timeframe ranged from 58% to 81% on a monthly basis for FY2014."

A word on how to read that figure. It measures fiscal year 2014 and was published in 2016. It is the most recent published measurement of Cook County vendor payment timeliness we could locate from a primary source, and we are not going to represent decade-old data as current performance. Treat it as evidence that late payment at this body has been a structural, measured problem — not as a prediction of what your invoice will do this month. If the County has published a more recent figure, it should displace this one.

What makes the audit genuinely useful is the diagnosis, which is about departments rather than about the Comptroller:

"Compliance with the Local Government Prompt Payment Act is heavily reliant on departments processing their invoices on a timely basis."

The specific inefficiencies the auditor listed:

• Nobody was recording the dates. "The date an invoice is received and the date an invoice is submitted to the Comptroller's Office for payment are not tracked... Without these key dates, the complete vendor payment processing cycle time cannot be determined and the efficiency of the timeliness cannot be quantified."
• Departments were inconsistent about entering payment requests into the County's accounting system before forwarding them.
• Supporting documentation lagged. Departments "may enter their payment requests, but do not forward the supporting documentation to the Comptroller's Office in a timely manner, which delays the actual payment."
• Invoices arrived anywhere. "Invoices are often received at various locations within the department," which the auditor found made tracking and control difficult.

That last point is the actionable one for a vendor. The auditor's own recommendation was that "departments should establish a centralized location where vendors are required to submit invoices." Until that is uniformly true, ask your department contact exactly where invoices go and confirm they received it — an invoice sitting in the wrong inbox inside the right department is invisible to the Comptroller and to the clock.

The contract terms that govern your invoice

Cook County's standard General Conditions set out what an invoice must contain and how payment works. Clause GC-04, Payment to Contractors and Subcontractors, is the one to read.

Invoices must be itemized in detail. For services, invoices "shall include itemized entries indicating the date or time period in which the services were provided, the amount of time spent performing the services, and a detailed description of the services provided during the period of the invoice." Sole-source service contracts carry a further requirement for records of the dates worked, the work performed on each date, and the time spent.

Past-due amounts go on a separate invoice. "Invoices for new charges shall not include 'past due' amounts, if any, which amounts must be set forth on a separate invoice." Mixing them is a straightforward way to delay a current invoice.

Submitting an invoice is a certification. By submitting, the contractor "certifies that all itemized entries set forth in the invoices are true and correct" and that it has delivered the goods or performed the services. The General Conditions warn that inaccurate statements or misrepresentations can result in "a delay in payment or non-payment," and referral to the County's Independent Inspector General.

The County can set off what you owe it. Under Section 34-177 of the Cook County Procurement Code, the County "shall have a right to set off and subtract from any invoice(s) or Contract price, a sum equal to any fines and penalties, including interest, for any tax or fee delinquency and any debt or obligation owed by the Contractor to the County." An unrelated County debt can reduce a payment you were expecting in full.

One clause deserves careful reading. GC-04 also states: "Contractor shall not be entitled to invoice the County for any late fees or other penalties." That is a contract term about what you may put on an invoice. The interest under 50 ILCS 505 is a statutory creature and arises differently. We are not going to tell you how a court would reconcile the two — that is a question for a lawyer looking at your specific contract, and any content that answers it confidently is overreaching.

Paying your subcontractors: 15 days

If you are a prime, GC-04 sets your own obligation:

"When a Contractor receives any payment from the County... the Contractor must make payment to its subcontractors within 15 days after receipt of payment from the County, provided that such subcontractor has satisfactorily provided the supplies, equipment, goods or services in accordance with the Contract and provided the Contractor with all of the documents and information required of the Contractor."

The clause preserves a good-faith right to delay where a subcontractor's work does not comply — but expressly not "in retaliation for a subcontractor exercising legal or contractual rights."

Separately, Section 9 of the Local Government Prompt Payment Act requires that prompt-payment interest received on a public construction contract be passed down to delayed subcontractors and suppliers pro rata. Interest is not the prime's to keep.

Getting paid faster — at a price

Cook County offers electronic payment, and the audit describes the trade explicitly:

"If a vendor selects to participate in the County's ACH payment process, the vendor agrees to have their payment amount reduced by either 1% if payment(s) are within 30 days of invoice date or by 2% if payment(s) are made within 20 days of the invoice date."

That is a discount you grant in exchange for speed, and the arithmetic is yours to do: 1% for roughly 30 days earlier is expensive money if you did not need it, and cheap if the alternative is borrowing.

The audit also records the default: "For all other vendors the payment terms default option is used, which is net 60 days after the invoice date." Absent a discount arrangement, net 60 from invoice date is the County's system default — consistent with the statute. The County additionally runs an E-Payables program using a Visa purchasing card, administered by the Comptroller's Accounts Payable division.

Who to contact

Accounts payable sits with the Office of the Cook County Comptroller, whose Accounts Payable division is responsible for paying vendors. The Comptroller's office address of record is 118 N. Clark Street, Room 500, Chicago, IL 60602.

Procurement itself — solicitations, contracts, vendor registration — runs through the Office of the Chief Procurement Officer, reachable from the County's Doing Business with Cook County page and its County Vendor Resources section.

For an invoice in flight, the practical order is the same as at most large bodies: confirm the department has processed and forwarded it before escalating to the Comptroller, because the audit above found that the department stage is where time is most often lost.

What we could not verify

Stated plainly, because a guide that hides its gaps is not much of a guide:

• A current average days-to-pay for Cook County. The FY2014 range above is the most recent published primary figure we found.
• Whether the FY2014 percentages have improved. The audit recommended process and ERP changes with an estimated completion date of 1 December 2016; we found no published follow-up measurement.
• A single countywide invoice submission address. The audit found invoices arriving at multiple locations within departments and recommended centralizing. Confirm your destination with your contracting department rather than assuming one exists.

Where GoVendor fits

GoVendor builds tooling for government vendors around this exact problem — submitting complete invoices to the right destination and knowing where each one stands, which is where the Cook County audit says most of the delay actually accumulates. If the gap in your cash flow is a 60-day statutory clock rather than a defective invoice, that is a financing conversation; if it is an invoice sitting in the wrong departmental inbox, no financing product fixes it. Nothing on this page describes a relationship with, or endorsement by, Cook County or any other body named here.

Sources

• Local Government Prompt Payment Act, 50 ILCS 505 — Illinois General Assembly
• Office of the Cook County Auditor — Vendor Payment Process, Final Audit Report, 18 April 2016 (PDF)
• Cook County — Contract General Conditions, April 2020 (PDF)
• Cook County — Doing Business with Cook County
• Cook County — Office of the Comptroller

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