Purchase limits for online orders, explained

Purchase limits vs. possession limits

Two different rules often get mixed up:

• Purchase (or sales) limits cap how much a dispensary can sell to one customer, usually per transaction or per day.
• Possession limits cap how much a person may legally carry or have at one time.

In some states the two numbers are the same; in others they’re different. As a retailer, the purchase limit is the one your checkout has to enforce.

How product equivalencies work

Cannabis comes in very different forms. A gram of concentrate contains far more THC than a gram of flower, and edibles are measured in milligrams of THC rather than weight. To handle this, many states define equivalencies: how much of each product type “counts” as a given amount of flower.

Limits are commonly set separately for categories such as:

• Flower, usually measured by weight
• Concentrates and vapes, usually measured by weight of concentrate
• Edibles and other infused products, usually measured by milligrams of THC

Depending on the state, a customer might have a separate limit for each category, or a single combined limit where every product is converted into a flower-equivalent amount.

A hypothetical example

To show how a combined limit works, imagine a fictional state with these rules. These numbers are made up for illustration only. Don’t use them as real limits:

In this fictional state, a cart with 15 g of flower (50%), 1.5 g of concentrate (25%) and 150 mg of edibles (25%) adds up to exactly 100%. Adding one more pre-roll would put the customer over the limit, so checkout should stop them and explain why.

Per-transaction vs. daily limits

Some states limit what can be sold in a single transaction. Others limit what one person can buy in a day, which means a second order later the same day may count toward the same limit. A few medical programs track purchases across dispensaries over longer periods.

For online ordering, that raises practical questions to settle with your compliance lead:

• Do earlier same-day orders count against a new online order?
• What happens if a customer places two separate online orders?
• How do you handle an online order combined with an in-store add-on at pickup?

Recreational vs. medical customers

Where both programs exist, medical patients often have different limits from adult-use customers, sometimes higher, sometimes calculated over a different period. Medical limits may also depend on the patient’s certification or registration. Your system needs to know which kind of customer is ordering and apply the right rules automatically.

Enforcing limits in an online cart

The best place to catch a limit problem is the cart, before the order ever reaches your team. A good online checkout should:

1. Convert every item to the right category or equivalency as it’s added.
2. Show progress toward the limit, so shoppers can adjust before they hit it.
3. Block an order that would exceed the limit, with a clear, friendly explanation.
4. Apply the right rule set for rec vs. medical customers and for each store location.
5. Stay up to date when your state changes its rules.

A shopper who learns about a limit at the counter has a bad experience. A shopper who sees it in the cart just picks a smaller size.

Checks at pickup still matter

Online enforcement reduces mistakes, but it doesn’t replace your team’s checks. At pickup, staff should still:

• Verify the customer’s ID (and medical credentials where required)
• Confirm the order matches what was approved online
• Account for any items added at the counter
• Record the sale in your POS and state tracking system as required

This article is general information, not legal advice. Purchase limits, equivalencies and tracking rules vary by state and change over time. Confirm current requirements with your state regulator.