Prix Futé
Why milk costs exactly the same at every grocery store in Quebec
Short answer: because it's the law. Regular milk prices are regulated in Quebec, and grocery stores have almost nothing to decide.
Useful answer: you're still losing money on milk, just not where you're looking for it.
Six grocery stores, one price
On August 24, 2026, we recorded the price of a 4-litre bag of Québon 2% milk at all six Montreal banners.
Zero. Not "a few cents". Zero difference between IGA, Maxi, Metro, Metro Plus, Provigo and Super C, same product, same day.
And the price they all display, $8.16, isn't a coincidence: it's the minimum price the law allows.
That isn't competition, it's a regulation
Quebec's Régie des marchés agricoles et alimentaires sets minimum and maximum retail prices for fluid milk. It's written into the Règlement sur les prix du lait de consommation, and the grid in force dates from February 2, 2026.
The minimum exists to stop milk from becoming a loss leader. If big-box stores could sell it below cost to pull you in, convenience stores and small grocers couldn't follow, and milk would eventually vanish from the places where they're the only option.
The maximum exists to protect you precisely where you have no choice.
Four regional grids cover Quebec. The one that applies to Montreal covers almost the entire province. Îles-de-la-Madeleine, Côte-Nord, Abitibi and Gaspésie have their own, with different prices: everything that follows applies to Region I.
The real question isn't where, it's which size
Here's where it gets interesting. All six banners sell the 4-litre at the legal floor. They sell the 1-litre and the 2-litre at the legal ceiling.
The large format sits at the lowest price the law permits. The small format sits at the highest. 14% apart per litre, for exactly the same milk.
If you buy four litres a week, one 4 L bag costs you $8.16 and four 1 L cartons cost you $9.32. Roughly $60 a year in difference. Multiply by what you actually drink.
The proof by contrast
You might think the identical price comes from competition rather than regulation. Just look at the milk the law doesn't cap.
The regulation excludes filtered, lactose-free, organic and UHT milk from the maximum price. On those, stores charge whatever they want.
The result, measured the same day, in the same stores:
| type of milk | gap between banners |
|---|---|
| regular milk, regulated | 1.9% |
| filtered, lactose-free, organic | 15.1% |
Eight times the gap, the moment the law stops applying. A few examples:
| product | gap |
|---|---|
| Finely filtered 1% milk, Natrel, 4 L | 15.1% |
| PurFiltre 2% milk, Lactantia, 4 L | 14.5% |
| Lactose-free 2% milk, Natrel, 4 L | 22.7% |
| Organic finely filtered 2% milk, Natrel, 2 L | 25.8% |
That's where comparing pays off again, and that's exactly what the app does for you.
What this changes for you
On regular milk, stop comparing stores. It's wasted time, the price is the same. We're a price comparison app and we're telling you: on this product, there is nothing to compare.
Compare formats instead. The 4-litre is at the legal floor, the 1-litre at the ceiling. If you can get through a bag before it turns, that's 14% less per litre.
On specialty milk, compare for real. Filtered, lactose-free, organic: there the gap between banners climbs back to 15%, sometimes 25%.
And remember milk is the exception. Nobody regulates the rest of your basket: in Sherbrooke, the same basket of 2,397 products cost 18% more at the priciest banner than at the cheapest.
If a price doesn't follow the grid
A price that doesn't comply can be reported. The form is online at Québec.ca, and MAPAQ inspection services follow up with the merchant.
Two things before you fill it in:
- Check that your milk is covered. Filtered, lactose-free, organic and UHT milk have no maximum price. A high price there isn't a violation.
- The complaint is about price, not availability. An empty shelf isn't reported through this form.
And one detail worth money: the cap applies in store. In February 2023, a La Presse investigation found prices on delivery platforms well above the legal maximum, up to $11.19 for a 4 L bag whose ceiling was $8.61. A class action on this is at the investigation stage. Nothing has been ruled on. But keep the principle: the regulated price is the store's price, and it doesn't follow the milk to your door.
And if you think the grid is wrong
The Régie is reviewing the regulation right now. Until October 2, 2026 at noon, anyone can send it written observations.
Retailers will. They've said so publicly: their gross margin on milk fell from roughly 7% to 5% of the sale price between 2023 and 2025, and they'll ask for it back. Whatever they get lands in the grid, and the grid lands in what you pay.
Nothing stops you from writing too.
How we measured
- Prices recorded August 24, 2026, in Montreal, at all six banners.
- Exactly the same product, compared from one banner to the next. Not different formats or brands.
- Region I regulated grid, in force since February 2, 2026.
- No banner is being accused of anything. On regulated milk, they apply a grid they don't set.
We're a price comparison app, and on regular milk we just told you there's nothing to compare. That runs slightly against our own interest. Which is exactly why it was worth writing.
Pay the real best price. Your fox handles the rest.