What Is a Commissary Letter? The Food Truck Requirement Explained (2026)
A commissary letter is the document that stalls more food truck applications than anything else — and most jurisdictions won't process your permit without it. What it is, what it must include, how to get one, and what a commissary costs.
If there's one document that stalls food truck applications more than any other, it's the commissary letter. Operators line up their truck, their menu, and their business license — then discover the health department won't even start their application without a signed commissary agreement. This guide explains exactly what it is, what it must contain, how to get one, and what it costs.
It's a cross-cutting requirement that shows up in nearly every one of our state guides — Illinois, California, Washington, and Florida all require it — so it's worth understanding once, deeply.
What a commissary letter actually is
A commissary (sometimes called a Central Preparation Facility) is a licensed commercial kitchen that serves as your food truck's home base. The commissary letter — or commissary agreement — is the document proving you have one: a signed statement from that kitchen's operator confirming your truck will use it for the things a truck can't safely do on its own.
Health departments require it because a mobile unit has limited water, refrigeration, storage, and waste capacity. The commissary fills those gaps:
- Food prep and storage between service
- Potable (fresh) water fill
- Wastewater (greywater) and grease disposal
- Cleaning and sanitizing equipment
- Often a daily check-in requirement (some jurisdictions, like Houston and Will County, IL, require the truck to return to the commissary daily)
Why it stalls so many applications
The mistake is treating the commissary letter as paperwork you'll handle after applying. In reality, most jurisdictions won't process your mobile food permit application without it signed and attached. Not promised — signed. We see this as the single most common cause of rejected or stalled first-time applications across every market we cover.
A few jurisdictions allow a self-sufficiency exemption if your truck independently meets all the water, waste, and storage requirements (Washington and California's CalCode have narrow versions). But the default everywhere is: get a commissary.
What a commissary letter must include
| Element | Why it matters |
|---|---|
| Commissary name + address | Identifies the facility |
| Food-establishment license number | Proves the commissary is itself licensed and inspected |
| Your business name + vehicle | Ties the agreement to your operation |
| Services provided | Prep, storage, water, wastewater/grease, cleaning |
| Agreement term | Shows it's current and ongoing |
| Operator's signature | The agreement isn't valid unsigned |
The two things inspectors check hardest: the commissary holds a current license, and the letter is signed. An expired-license commissary or an unsigned letter gets the application bounced.
How to find a commissary
- Dedicated commissary facilities — built for mobile vendors, with parking and dumping stations
- Shared / commercial kitchens — incubators like Chicago's The Hatchery or Kitchen Chicago
- Restaurants renting off-hours — a local restaurant's kitchen during its closed hours
- Churches, schools, catering kitchens — if they hold the right commercial license
The non-negotiable: it must hold a current commercial food-establishment license and be willing to sign your agreement. Visit 2–3 before committing — overbooked facilities, or one that's an hour from your vending spots, is a common and expensive regret.
What it costs
Commissary rent is typically $150–$1,200+ per month, and it scales with the market:
- Major metros (Chicago, LA, SF): higher — California runs $600–$2,000/month
- Smaller markets / shared kitchens: $150–$600/month
It's usually a food truck's single biggest recurring cost — bigger than any permit fee. Budget it from day one; underbudgeting the commissary is what turns a thin-margin food truck unprofitable.
After the letter: the rest of the application
The commissary letter is one prerequisite among several. Once it's signed, the next steps are your food manager certification, your certificate of insurance, and passing the health inspection. And the commissary's name, address, and license number become yet another set of fields you'll copy onto every permit application.
That's the repetition AutoFill PDFs removes — your commissary details live in your vendor profile and fill onto each city's form automatically. Browse all our city permit guides to see the exact commissary rules where you operate.
Based on mobile food permitting requirements across the U.S. jurisdictions we cover, verified 2026. Commissary rules and exemptions vary by health department — confirm your local requirement before signing an agreement.
Frequently asked questions
- What is a commissary letter for a food truck?
- A commissary letter (or commissary agreement) is a signed document from a licensed commercial kitchen confirming that your food truck will use it as its base of operations — for food prep and storage, fresh-water fill, wastewater and grease disposal, and cleaning. Health departments require it because a mobile unit can't safely do all of that on board. Most jurisdictions will not process your mobile food permit application without a signed commissary letter on file.
- Why do food trucks need a commissary?
- Because a truck has limited water, storage, and waste capacity. The commissary is the licensed, inspected kitchen where you prep and store food, refill potable water, dump greywater and grease, and clean equipment — often with a daily check-in requirement. It's a core food-safety rule in nearly every U.S. jurisdiction; only a few allow a 'self-sufficient' exemption if the truck independently meets all those needs.
- What should a commissary letter include?
- The commissary's name, address, and food-establishment license number; your business name and vehicle; the services provided (prep, storage, water, wastewater/grease disposal, cleaning); the agreement term; and the signature of the commissary operator. Health departments check that the commissary holds a current license and that the letter is signed — an unsigned or expired one gets the application rejected.
- How much does a food truck commissary cost?
- Typically $150–$1,200+ per month depending on the city and access level. Major metros (Chicago, Los Angeles, San Francisco) run higher — $600–$2,000/month in California — while smaller markets and shared/commercial kitchens can be $150–$600. It's usually the single biggest recurring cost of running a food truck, bigger than any permit fee.
- Where can I find a commissary for my food truck?
- Options include dedicated commissary facilities, shared/commercial kitchens (incubators like The Hatchery in Chicago), restaurants renting off-hours, and some churches, schools, or catering kitchens with the right license. The key requirement: it must hold a current commercial food-establishment license and be willing to sign your agreement. Visit 2–3 before signing — overbooked or far-away commissaries are a common regret.
Jackie Kotarba is a ServSafe Certified Instructor and Proctor licensed in all 50 states and a working health inspector who provides food manager certification and food-safety training. She brings 15+ years in hospitality — including running her own restaurant and launching the Chicago Pierogi Wagon food truck — to the permit and food-safety guidance on AutoFill PDFs.
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