The six-doughnut tax rule: why the sixth doughnut costs 35% of list

Order five doughnuts to go in Ontario and the register charges 13% HST. Order six and it charges nothing. The Canada Revenue Agency treats fewer than six sweetened baked goods as a snack and six or more as groceries, and groceries in Canada are zero-rated.

The interesting part is not that the rule exists. It is what the rule does to the price of one doughnut. Because crossing the line un-taxes the whole order rather than just the last item, the sixth doughnut costs 35% of its list price in Ontario — $0.56 on a $1.59 classic at Tim Hortons, against the $1.80 the fifth one cost you.

And there is a second, less famous cliff going the other way. In Ontario, the third doughnut is the expensive one.

The legal basis, stated properly

Two provisions of the Excise Tax Act do the work here, and they are commonly cited wrong.

Schedule VI, Part III, paragraph 1(m) is the six-item rule. Sweetened baked goods — cakes, muffins, pies, tarts, cookies, doughnuts and similar products — are excluded from zero-rating when they are pre-packaged for sale in quantities of fewer than six single servings, or sold as single servings in quantities of fewer than six. The exception restoring zero-rating is written as goods "pre-packaged for sale to consumers in quantities of more than five items each of which is a single serving."

Paragraph 1(q) is the one that matters at a coffee shop specifically. At an establishment where substantially all sales are taxable food, everything is taxable except, among other things, where the product is pre-packaged in quantities of more than five single servings "and is not sold for consumption at the establishment."

That last clause is the catch nobody mentions. The half-dozen has to be to go. Buy six doughnuts and eat them at a table in the store and paragraph 1(q) puts the tax back on. Take the box out the door and it is zero-rated.

A third provision, paragraph 1(o), excludes food or beverages heated for consumption from zero-rating, which is the heating trap covered further down.

What the sixth doughnut actually costs

Tim Hortons prices a classic doughnut — Glazed, Chocolate Glazed, Honey Cruller, Boston Cream — at $1.59, and there is no bulk discount: six cost $9.54 and twelve cost $19.08, exactly double, the same per piece at any quantity. Anyone quoting you a discounted half-dozen box price is quoting a number that is not on the menu.

So the entire saving here is tax, and it is worth laying out doughnut by doughnut. Ontario also runs a point-of-sale rebate of the 8% provincial portion of the HST when the total for qualifying prepared food and beverages on a transaction is $4.00 or less, which means small orders pay only 5% GST.

Read the right-hand column and the whole thing falls out.

The third doughnut costs $2.05, or 129% of its own list price, because buying it pushes the order past $4.00 and costs you the provincial rebate on the two you had already chosen. It is the most expensive doughnut in the box by a wide margin.

The sixth doughnut costs $0.56, or 35% of list, because buying it strips 13% off everything underneath it. Six doughnuts cost $9.54 against $8.98 for five: fifty-six cents for an extra doughnut.

Buying six as individually taxed singles would cost $10.78. Buying them as a to-go half-dozen costs $9.54, a saving of $1.24 on an order of six.

The 35% rule generalises

That 35% is not a coincidence of doughnut pricing. It falls out of the arithmetic and holds for any sweetened baked good at any price, because both sides scale with the item price.

Five items at price p with tax rate t cost 5p(1 + t). Six items zero-rated cost 6p. The difference — what the sixth item costs you — is (6 − 5(1 + t)) × p.

The higher your province's sales tax, the cheaper the sixth doughnut. In the 15% HST provinces it costs a quarter of list price. In a GST-only province, where there is only 5% to escape, most of the discount disappears and the sixth item still costs you three quarters of list. Confirm your own province's current rate before applying the formula; HST rates have moved in recent years.

The same logic explains the $1.79 items. An Apple Fritter or a Muffin Top costs $1.79, so five come to $10.11 with tax and six to $10.74 — the sixth fritter costs $0.63, which is 35% of $1.79, exactly as the formula says.

Mixing and matching is allowed

The six do not have to be identical, and they do not have to be doughnuts. Any qualifying sweetened baked goods count toward the same total: doughnuts, muffins, muffin tops, cookies, croissants, tarts.

Using verified Tim Hortons prices, a mixed six might be two Boston Creams at $1.59, two Blueberry Muffins at $1.79, one Apple Fritter at $1.79 and one Chocolate Chip Cookie at $1.99, for a pre-tax total of $10.54. Because the count reaches six qualifying items and the order leaves the store, the baked goods on that receipt are zero-rated.

Stop at five of those items and you drop $1.99, leaving $8.55 pre-tax — which then attracts 13% HST and comes to $9.66. Six items for $10.54 against five for $9.66: the sixth costs $0.88 and you have more food.

One limit worth stating clearly: the zero-rating applies to the qualifying baked goods, not to your whole bill. Add a coffee to that order and the coffee is taxed normally. The six-item rule is not a spell you cast over a receipt.

The heating trap

Under paragraph 1(o), food heated for consumption is excluded from zero-rating regardless of quantity. Ask for one of the six to be warmed and that item becomes prepared food.

If a warm pastry is what you actually want, the clean move is two transactions: five or more cold items in one, the heated item in the other. That keeps the tax confined to the single heated pastry rather than putting the qualifying status of the order in question.

The same applies to the to-go condition. If you are eating in, paragraph 1(q) removes the exception and the box is taxable however many are in it.

Timbits are not doughnuts, but the boxes still work

A single Timbit is $0.35 and the boxes run $3.29 for 10, $6.29 for 20 and $14.99 for 50. Unlike doughnuts, Timbits carry a genuine bulk discount: about $0.33 each in a 10-box, $0.31 in a 20-box and $0.30 in the 50-box, roughly 14% off the single-piece rate at the top end.

Because every box holds well more than six pieces, the boxes clear the quantity threshold comfortably. Buy three loose Timbits and you are buying a taxable snack in a quantity under six.

Frequently asked questions

Why does Canada not charge tax on six doughnuts?

Because the Excise Tax Act treats sweetened baked goods in quantities of six or more as basic groceries rather than as a snack, and basic groceries are zero-rated. Fewer than six is treated as a single-serving purchase and taxed at the full provincial rate.

Does the six-doughnut rule work if I eat them in the store?

No, and this is the part most explanations leave out. Paragraph 1(q) restores the tax on food sold for consumption at the establishment. The exception only applies where the six-or-more package "is not sold for consumption at the establishment," so the box has to leave with you.

Is the sixth doughnut free?

Not at Tim Hortons pricing, because there is no discounted half-dozen box. Five classic doughnuts cost $8.98 with tax and six cost $9.54, so the sixth costs $0.56 — 35% of its $1.59 list price in Ontario, but not zero.

Why is the third doughnut the expensive one?

Ontario rebates the 8% provincial portion of the HST on qualifying prepared food where the transaction total for those items is $4.00 or less. Two classic doughnuts come to $3.18 and stay under that cap. A third pushes the order to $4.77, the rebate disappears, and the tax rate on the whole order jumps from 5% to 13%. That third doughnut costs $2.05.

Can I mix doughnuts, muffins and cookies to reach six?

Yes. The rule counts qualifying sweetened baked goods, not identical items, so any combination of doughnuts, muffins, cookies, tarts or croissants totalling six or more single servings qualifies.

Does the same rule apply at a grocery store bakery?

The six-item threshold in paragraph 1(m) is the same. The eating-establishment condition in paragraph 1(q) is what differs, since a grocery store is not an establishment where substantially all food sales are taxable, so the on-premises consumption question does not arise in the same way.

Does getting a doughnut heated make it taxable?

Yes. Paragraph 1(o) excludes food heated for consumption from zero-rating. Heating removes that item from the grocery treatment regardless of how many you bought.

Methodology and disclaimer

Tax provisions cited are Schedule VI, Part III, paragraphs 1(m), 1(o) and 1(q) of the Excise Tax Act, as explained in CRA GST/HST Memorandum 4.3, Basic Groceries. Doughnut, muffin, cookie and Timbit prices come from the verified menu file behind this site's Tim Hortons page, recorded August 2026. Tax calculations use Ontario's 13% HST and Ontario's point-of-sale rebate of the 8% provincial portion on qualifying prepared food and beverages totalling $4.00 or less. Provincial rates change; confirm your own before relying on the arithmetic. This page explains published tax rules and is not tax advice.

Froqel is an independent price guide. We are not affiliated with, endorsed by, or sponsored by Tim Hortons, the Canada Revenue Agency, or any restaurant chain named here. All trademarks belong to their respective owners.