A good tax and tip calculator Quebec page has to do two things at once.
It has to calculate Québec’s two sales taxes correctly, and it has to handle tipping the way Québec actually works in practice. In Québec, the GST is 5% on the selling price, and the QST is 9.975% on the selling price excluding GST. Revenu Québec also says a cash register can calculate both together with a one-step rate of 14.975%.
That already makes Québec different from places that use one combined sales tax.
It also matters for tipping. The Office de la protection du consommateur says that when a merchant suggests tip amounts as percentages on a payment terminal, those percentages must be calculated on the price before GST and QST. The terminal must also offer a way to enter your own amount, and the options have to be shown neutrally.
That is why this calculator is built the way it is.
It starts from the subtotal before taxes, calculates GST and QST separately, adds any service charge that is already on the bill, and then applies the tip on the base you choose. The default tip base is the Québec-standard approach: before GST and QST.
How tipping usually works in Québec
Tipping is still customary in Québec restaurants.
Bonjour Québec says tipping is expected in restaurants, bars, and taxis, and generally represents about 10% to 15% of the total before taxes. Tourisme Montréal is even more direct: it says it is customary to tip restaurant waiters 15% of the bill before taxes.
That means a practical Québec rule is simple.
If service was normal and you want the local standard, 15% before taxes is a very common choice. If the service was more basic, some people go a little lower. If it was excellent, some people tip 18% or 20%. But the core local benchmark is still very close to 15% before taxes.
There is also a good reason many people in Québec think in pre-tax percentages.
The OPC rule for payment terminals now requires suggested percentage tips to be calculated before GST and QST. So the local legal rule and the local custom line up.
Why this calculator uses GST and QST separately
Some people like to think of Québec taxes as “about 15%.”
That shortcut is useful, and Revenu Québec confirms that a one-step tax calculation can use 14.975%. But showing GST and QST separately is clearer for most bills because it matches how people in Québec usually talk about the taxes: GST at 5% and QST at 9.975%.
It also makes service charges easier to understand.
If a mandatory service charge is already on the bill, that charge becomes part of the taxable base. Revenu Québec says tips freely offered by customers are not subject to GST or QST, but tips included in the bill as mandatory or suggested service charges are taxable.
That is an important distinction.
A voluntary tip is not taxed. A mandatory or bill-added service charge is taxed. This calculator reflects that by taxing the service charge field before it adds any extra voluntary tip.
How to use the tax and tip calculator Québec
Start with the subtotal before taxes.
This is the amount for the meal or service before GST and QST are added. In Québec, restaurant and immediate-consumption food sales are generally taxable, so this is the right place to begin the calculation. Revenu Québec says customers must pay GST and QST on basic food and beverage items sold by establishments where at least 90% of food and beverage sales are taxable, which is the normal case for restaurants.
Next, add any service charge already included before tax.
This field matters most for large groups, banquet meals, and situations where a restaurant adds an automatic gratuity or service charge. In Québec, that kind of bill-added amount is taxable, so the calculator includes it in the GST and QST base.
Then choose the tip percentage.
If you want the most common Québec approach, use 15%. If you want a lower or higher number, you can switch to 10%, 18%, 20%, or a custom value. Official tourism sources in Québec point to about 10% to 15% before taxes, while Tourisme Montréal specifically recommends 15% before taxes.
Then choose the tip base.
The default option is “Quebec standard: before GST/QST.” That matches Québec’s terminal rule and the most common local expectation. But the calculator also lets you use the subtotal plus service charge before taxes, or the after-tax total, if you want to mirror a different habit or compare what happens.
Finally, enter how many people are splitting the bill.
The calculator then shows GST, QST, total tax, tip, total bill, and the per-person share. That is useful because the hardest part of dining out in Québec is often not the tip itself. It is keeping the taxes, gratuity, and split straight at the same time. This is an inference based on the way Québec taxes and tips stack on the same bill.
How the Québec tax and tip math works
The tax part is straightforward.
GST is 5% of the taxable selling price. QST is 9.975% of the selling price excluding GST. Revenu Québec also allows a one-step method using 14.975% when a cash register calculates both taxes at once.
The tip part depends on which kind of tip you mean.
If the tip is freely chosen by the customer, it is not taxable. If the restaurant adds a mandatory or suggested service charge to the bill, that amount is taxable. That is why the calculator taxes the service-charge field but does not tax the extra voluntary tip.
That single rule explains a lot of confusion at restaurants.
A bill can have subtotal, service charge, GST, QST, and then a tip prompt on the terminal. If you do not separate those pieces, it is easy to overpay without realizing it. The calculator makes each step visible. This is an inference from Revenu Québec’s tax treatment of voluntary tips versus service charges.
Example 1: A standard Québec restaurant bill
Suppose the subtotal before taxes is $100.00 and there is no service charge.
The GST is $5.00. The QST is $9.98 when rounded to the nearest cent. Total tax is $14.98. If you tip 15% before taxes, the tip is $15.00. The final total is $129.98. That math follows Revenu Québec’s current GST and QST rules and Québec’s common before-tax tipping norm.
This also shows why so many people in Québec use the “taxes plus tip is about 30%” shortcut.
Bonjour Québec says that for quick tip calculations, you can add both taxes on the restaurant bill, which comes to roughly 15%, and then add a tip of roughly 15% before taxes.
Example 2: Comparing before-tax tipping with after-tax tipping
Now use the same $100.00 subtotal but compare two methods.
With the Québec-standard method, a 15% tip is $15.00, and the final total is $129.98. If you instead tip 15% on the after-tax total of $114.98, the tip becomes about $17.25, and the final total rises to about $132.23. The difference is small on one meal, but it grows over time. That comparison follows Revenu Québec’s tax rates and the OPC’s rule that suggested tip percentages in Québec must be calculated before GST and QST.
This is one of the most useful reasons to have a Québec-specific calculator.
It lets you see the difference instead of guessing at the terminal.
Example 3: A large group with a service charge
Suppose a restaurant subtotal is $200.00 and the restaurant adds a $36.00 automatic service charge before tax.
The taxable base becomes $236.00. GST is $11.80. QST is about $23.54. Total tax is about $35.34. If you decide the automatic service charge already covers the gratuity and leave no extra tip, the total bill becomes about $271.34. That is exactly how Québec treats bill-added service charges: they are taxable.
This is where many people accidentally double-tip.
They see a tip prompt on the terminal, do not notice the service charge already printed on the bill, and add another full 15% or 18%. The calculator helps because it makes the service charge visible before you decide whether to add anything extra. This is an inference from the tax treatment of service charges and the way Québec payment terminals suggest tips.
Example 4: Splitting a bill in Québec
Take a $160.00 subtotal with no service charge and a 15% pre-tax tip.
GST is $8.00. QST is $15.96. Total tax is $23.96. Tip is $24.00. The full total is $207.96. If four people split the bill evenly, each person owes $51.99. That calculation follows Québec’s current GST/QST rates and the standard 15% before-tax tipping convention.
This is where the split-bill line matters.
Without it, people often divide the subtotal evenly and then forget to divide the taxes, service charge, or tip correctly. The calculator removes that guesswork. This is an inference from how taxes and tips stack on Québec bills.
Why Québec’s terminal rule matters so much
Québec is unusual because it is no longer just a matter of etiquette.
The OPC rule means that when a merchant suggests percentage-based tip amounts on a terminal, those percentages must be calculated on the amount before GST and QST. Merchants must also provide an option for consumers to enter their own amount, and the choices must be displayed without nudging people toward one option.
That makes the calculator even more useful.
You can use it to mirror the legal Québec standard before you get to the terminal. Then you know whether the prompt in front of you makes sense.
Wages and why tipping still matters in Québec
Tipping culture in Québec also sits alongside a special tipped minimum wage.
CNESST says the general minimum wage is currently $16.10 per hour, while the minimum wage for employees receiving gratuities and tips is currently $12.90 per hour, both in effect since May 1, 2025.
That does not make any single tip amount legally mandatory.
But it does help explain why tipping remains a strong custom in Québec restaurants, especially at full-service places. Bonjour Québec also notes that the minimum wage for waiters is lower and that tips are part of income.
The easiest rule to remember
If you want one simple Québec rule, use this:
Start with the subtotal before taxes. Add GST and QST. Tip 15% on the subtotal before taxes unless you have a reason to choose another amount. Check the bill carefully if there is a service charge, because that charge is taxable and may already cover part or all of the gratuity you intended to leave.
That approach is local, current, and easy to use.
It matches Québec tax rules, Québec tipping norms, and Québec’s payment-terminal rule all at once.
Final thoughts
A tax and tip calculator Quebec page should not just add 15% and stop.
It needs to reflect Québec’s actual structure: GST at 5%, QST at 9.975%, voluntary tips that are not taxed, service charges that are taxed, and a local expectation that tip percentages should be based on the amount before GST and QST.
That is what makes this calculator useful.
It handles the part most people do not want to do in their head. It also gives a more honest picture of the full bill, especially when there is a service charge or a split payment involved. This is an inference from Québec’s tax and tipping rules.
FAQ
What are the sales taxes in Québec?
Québec uses two main sales taxes: GST at 5% and QST at 9.975% on the selling price excluding GST. Revenu Québec also allows a one-step combined calculation at 14.975%.
Should you tip before or after tax in Québec?
The Québec-standard approach is before tax. The Office de la protection du consommateur says percentage-based suggested tips on payment terminals must be calculated on the price before GST and QST.
What is a normal restaurant tip in Québec?
Official Québec tourism sources point to about 10% to 15% before taxes, and Tourisme Montréal specifically recommends 15% before taxes for restaurant service.
Are tips taxed in Québec?
A freely offered voluntary tip is not subject to GST or QST. But a tip included in the bill as a mandatory or suggested service charge is taxable.
Why does the calculator tax the service-charge field?
Because Québec treats bill-added service charges as taxable amounts. That means GST and QST apply to the subtotal plus the service charge.
What is the current tipped minimum wage in Québec?
CNESST says the minimum wage for employees receiving tips is currently $12.90 per hour, while the general minimum wage is $16.10 per hour. Both rates shown on the current CNESST pages have been in effect since May 1, 2025.
Sources
- Revenu Québec – Basic Rules for Applying the GST/HST and QST
- Revenu Québec – Calculating the Taxes
- Revenu Québec – Tips and Service Charges
- Revenu Québec – Operators of a Restaurant Establishment
- Revenu Québec – Food and Beverages Prepared or Sold for Immediate Consumption
- Office de la protection du consommateur – Suggested Tip Amounts
- CNESST – Wages for Employees Receiving Tips
- CNESST – Minimum Wage in Québec
- Bonjour Québec – Good to Know Before You Leave
- Tourisme Montréal – Practical Information
