What Counts as Shelf-Stable?
The Plain-English Definition
A shelf-stable food is one that is safe to store and sell at room temperature — without refrigeration — for a reasonable period of time. In Montana's regulatory language, these are called non-potentially hazardous foods (non-PHF), meaning they don't require "time and temperature control for safety" (TCS). Simply put: if your product sits on a counter at room temperature and stays safe to eat, it's likely shelf-stable.
Why does this matter? Montana's Cottage Food Operation (CFO) registration program only approves shelf-stable, non-PHF foods. If your product requires refrigeration to stay safe — not just for quality, but for safety — it cannot be registered and sold under the CFO track. It may still be sold under the MLFCA food freedom track with different conditions (see the Prepared Meals guide for details).
The safety of shelf-stable foods comes down to two key scientific factors: water activity and pH. Both govern whether harmful bacteria — like Clostridium botulinum, Salmonella, or Listeria — can grow in your product. Foods with low water activity (dry) or high acidity (low pH) naturally inhibit bacterial growth, making them shelf-stable at room temperature.
💧 Water Activity (Aw)
Water activity measures how much "free" water is available for microbial growth — not total water content. A product can be moist and still have low water activity if the water is bound to sugar or salt.
Safe threshold: Aw of 0.85 or below generally prevents most pathogen growth.
Examples: Dried fruit, granola, hard candy, biscotti, most baked goods. High-sugar jams and jellies bind water, lowering Aw despite their moisture content.
🧪 pH (Acidity)
pH measures acidity. Foods with a pH of 4.6 or below are considered high-acid and resist the growth of the most dangerous pathogens, including C. botulinum.
Safe threshold: pH ≤ 4.6 for high-acid foods; standard jams and jellies with added lemon juice typically fall in this range.
Examples: Most jams and jellies (high acid + high sugar), lemon curd (if shelf-stable by recipe), some fruit butters. Note: not all acidic-tasting foods have a safe pH — verify with a tested recipe.
You don't need to conduct lab tests to register your cottage food products — but your county sanitarian will review your recipes and may ask detailed questions about ingredients and processes. Using well-established recipes (from Ball, USDA, or university extension sources) is the best way to demonstrate your product is non-PHF.
Montana Has No Annual Sales Cap
Montana is one of the most seller-friendly states in the country when it comes to revenue. Both the Cottage Food Operation (CFO) program and the Montana Local Food Choice Act (MLFCA) have no annual gross sales limit. You can sell $5,000 or $500,000 worth of cottage food per year — the law does not restrict you.
Note: Some older third-party sources cite a $50,000 annual cap. That figure is outdated and no longer reflects current Montana law. The current CFO statute (MCA §50-50-117) and ARM rules contain no dollar limit. [VERIFY with DPHHS if you encounter conflicting information: (406) 444-2837]
When your business grows to the point where you want to sell wholesale, ship interstate, or sell through restaurants and retailers, you will need to obtain a retail food license or wholesale food license through DPHHS — but that's a graduation step, not a cap.
Where You Can Sell Shelf-Stable Foods
Your sales channel options depend on which track you're operating under. The CFO registration gives you the widest range of channels for shelf-stable products — including online ordering with in-person delivery.
| Sales Channel | CFO (Track 1) | MLFCA (Track 2) | Notes |
|---|---|---|---|
| Direct from Home | ✓ Allowed | ✓ Allowed | Buyer picks up from your home; face-to-face transaction required |
| Farmers Markets | ✓ Allowed | ✓ Allowed | CFO: registration may not be required if selling only farmers-market-exempt products. Check with your market manager — some require registration for all vendors |
| Farm Stands | ✓ Allowed | ✓ Allowed | Your own farm stand or roadside stand |
| Fairs, Bazaars & Events | ✓ Allowed | ✓ Allowed | Flea markets, craft fairs, community festivals, church sales, school fundraisers — traditional community events |
| Online Ordering | ✓ Allowed | ✗ Not allowed | CFO only: online orders must be fulfilled with in-person delivery — you deliver to the buyer or the buyer picks up. No shipping permitted under either track |
| In-Person Delivery | ✓ Allowed | ✓ Allowed | You or your designated agent can deliver directly to the buyer. No third-party couriers or mail/shipping services |
| Wholesale to Retailers | ✗ Not allowed | ✗ Not allowed | Neither track allows wholesale. Requires a separate retail or wholesale food license from DPHHS |
| Restaurants & Cafés | ✗ Not allowed | ✗ Not allowed | Neither track allows sales to food service establishments. Wholesale food license required |
| Consignment (Retail Shops) | ✗ Prohibited | ✗ Not allowed | CFO law specifically prohibits consignment. MLFCA prohibits all third-party resale |
| Interstate Sales & Shipping | ✗ Prohibited | ✗ Prohibited | Both tracks are limited to in-state sales only. Out-of-state buyers must physically come to Montana to purchase |
Storage & Handling Rules
Under the CFO registration, Montana requires that products be produced and stored in specific, registered areas of your home. These aren't burdensome rules — they're practical standards that keep your products safe and your registration valid.
Registered Area Only
All production, packaging, and storage must take place in the specific registered area of your home — typically your kitchen. You cannot produce cottage food in a garage, barn, or outbuilding unless that space is registered.
Pet Restrictions During Production
Household pets must not have access to the registered production area while food is being made or packaged. This is a condition of registration — not enforced by routine inspection, but verified during complaint investigations.
Vehicle Transport Allowed
You may store finished products temporarily in a motor vehicle being used to transport or deliver them to buyers. Products may not be stored long-term in vehicles.
Water Source
Your kitchen must have an approved water source. If on a private well, you must provide lab test results for total coliform and nitrates at registration time. Public water systems generally pass automatically.
Sanitary Production
Your registration application requires you to describe your cleaning and sanitation procedures. Surfaces, equipment, and utensils must be cleaned and sanitized before production.
Packaging Before Sale
All products must be properly packaged and labeled before sale. Open or bulk foods cannot be sold without a label unless alternate labeling arrangements (like a label sheet) are approved with your registration.
Sanitation Requirements at a Glance
Montana's CFO rules require you to describe your sanitation practices in your registration application. While there's no routine home inspection, you must demonstrate that your operation meets these basic standards:
- Counters and surfaces cleaned before each production session
- Sanitizer solution prepared and used on food-contact surfaces
- Equipment and utensils washed, rinsed, and sanitized
- Allergen ingredients stored separately to prevent cross-contamination
- Handwashing before and during food production
- No eating, drinking, or tobacco use during packaging
- Pets excluded from the production area during production
- Ill household members not handling food (communicable disease rule)
- Raw ingredients stored away from finished products
- Frozen fruits and vegetables thawed safely before use in recipes
🫙 A Note on Jams, Jellies & Fruit Butters
Standard jams and jellies are shelf-stable because their high sugar content binds water (lowering water activity) and the added acid (lemon juice or commercial pectin) keeps the pH below 4.6. Montana's CFO program approves these products when they comply with the standards in 21 CFR Part 150 — the federal identity standard for these products. Use well-tested recipes from Ball, USDA, or university extension sources. Do not attempt to reduce sugar significantly without testing, as this can compromise shelf stability. Fermented or lacto-fermented preserves are NOT approved under CFO registration.
Sales Limit Tracker
Track your annual sales against Montana's requirements and get alerts as your business grows toward the commercial licensing threshold.
Create Free Account to Use This Tool →Montana DPHHS — Food & Consumer Safety Section
Helena, MT 59620-2951