CAHT in Canada: A Practical Guide to “Chiffre d’Affaires Hors Taxes” for Real-World Business Decisions

If you sell in Canada—especially if you operate in Quebec or deal with bilingual invoices—you’ve probably stumbled on the abbreviation “CAHT.” It looks cryptic until you translate it: “chiffre d’affaires hors taxes,” or revenue before tax. Simple idea, big consequences. CAHT shapes how you price, invoice, file GST/HST and QST, and read your own financials. Get it wrong and you can end up mispricing products, missing small supplier thresholds, or bungling your tax returns. Get it right and your books make sense, your margins are clean, and audits don’t keep you up at night.

This in-depth guide unpacks caht in plain English, anchored in Canadian reality. You’ll learn what CAHT means, how it interacts with GST/HST, QST, PST/RST, how to calculate it for each province and territory, how to record it in accounting software, and how it shows up in filings. We’ll walk through examples—from a Toronto café to a Montreal SaaS startup to a Vancouver contractor—and flag the everyday traps that cost time and money. Ready to make “hors taxes” your friend instead of a puzzle?

What “CAHT” Actually Means in Canada

CAHT stands for “chiffre d’affaires hors taxes,” the French accounting shorthand for revenue excluding tax. On an invoice or a dashboard, CAHT refers to your sales total before any GST/HST, QST, or PST is added. If you’ve ever seen “HT” and “TTC” on French or Quebec invoices, you’ve seen the same idea: HT (hors taxes) is before tax; TTC (toutes taxes comprises) is all taxes included.

Why does caht matter in Canada? Because our sales tax system layers federal and provincial rules. A sale in Halifax isn’t taxed the same way as a sale in Vancouver. Consumers usually see “TTC”—the total they pay—while your accounting, pricing decisions, and tax filings live in the CAHT world. When your invoicing software or bookkeeper talks about “amounts excluding tax,” they mean CAHT. When the CRA asks for “total taxable sales (excluding tax)” on a GST/HST return, they’re asking for CAHT.

One more nuance: CAHT is about sales tax only. It’s not net of payment processing fees, shipping expenses, or platform commissions—unless you’ve determined under accounting standards that you’re an agent and should recognize net revenue (we’ll get to principal vs. agent later). In short, caht is your sales base before tax is layered on top.

Why CAHT Matters: The Business Case

You might think, “I collect the tax and remit it—why obsess over the before-tax number?” Because CAHT underpins your whole commercial engine in Canada:

• Pricing clarity: CAHT reveals your actual selling price. It’s how you compare SKUs, negotiate with wholesale partners, and guard your margins across provinces.
• Compliance: CRA and Revenu Québec ask for sales figures excluding tax. Small supplier thresholds are measured on CAHT. Many election thresholds (like the GST/HST Quick Method) look at CAHT too.
• Performance tracking: Want to see if a promotion worked in B.C. versus Ontario? Compare CAHT by region. Taxes only muddy the picture.
• Cash flow: Tax collected isn’t your money. Separating CAHT from tax makes it obvious what you can spend and what you’ll remit.
• Audit-readiness: If you can reconcile CAHT to your GST/HST and QST returns with clean documentation, audits turn from stressful to routine.

In bilingual Canada, especially in Quebec, “CAHT” is not just a translation. It’s a working label that shows up in accounting reports, CRM exports, and ERP dashboards. Treat it as a core number, not a footnote.

Sales Taxes in Canada: The Landscape Behind CAHT

To understand caht, you need a clear map of Canadian sales taxes. Canada blends a federal tax with a mix of provincial approaches. Here’s the high-level picture you’ll be working with when you split out CAHT and taxes on invoices.

GST and HST

Canada’s federal Goods and Services Tax (GST) is 5%. Several provinces combine their provincial sales tax with the GST to form the Harmonized Sales Tax (HST). HST is a single tax you charge based on the place-of-supply rules. Current HST provinces and rates:

• Ontario: 13%
• New Brunswick: 15%
• Newfoundland and Labrador: 15%
• Nova Scotia: 15%
• Prince Edward Island: 15%

In all other provinces and territories, you charge GST at 5% and, where applicable, a separate provincial tax (PST/RST/QST). In the three territories (Yukon, Northwest Territories, Nunavut), there’s no territorial sales tax—only GST applies.

Quebec’s QST

Quebec administers its own Quebec Sales Tax (QST) through Revenu Québec. The QST rate is 9.975%. Since 2013, QST is calculated on the selling price excluding GST. That matters for math: you don’t charge QST “on top of GST.” Each tax is applied separately to CAHT.

Quebec has also brought many non-resident and digital suppliers into the system. If you sell to Quebec consumers without a physical presence in the province, you may still need to register for QST under simplified rules if you pass certain thresholds. Bottom line: Quebec cares about sales to its residents, and your caht in Quebec can trigger QST registration even if you’re based elsewhere in Canada or abroad.

Provincial Sales Taxes (PST/RST)

British Columbia, Saskatchewan, and Manitoba run their own retail sales taxes, separate from GST. Typical rates are:

• British Columbia PST: 7%
• Saskatchewan PST: 6%
• Manitoba RST: 7%

These provincial taxes have their own registration requirements, exemptions, and definitions of what’s taxable. Invoices often show GST and PST as separate lines, both calculated on CAHT. For example, $100 CAHT in Vancouver with a taxable good usually yields $5 GST and $7 PST, total $112 TTC.

Zero-Rated vs. Exempt: Why It Matters for CAHT

Not all supplies are taxed the same way. “Zero-rated” items (like basic groceries or exports of many goods) are taxable at 0%—you don’t charge tax, but they still count as taxable supplies for thresholds and input tax credit (ITC) eligibility. “Exempt” items (like many financial services, residential rents, most health services) are outside the tax system—you don’t charge tax and generally can’t claim ITCs on related inputs.

From a CAHT perspective, both zero-rated and exempt sales contribute to your top-line revenue before tax. But only zero-rated sales count toward small supplier thresholds for GST/HST and QST. Keep that in mind when you’re hovering near $30,000 in annual taxable supplies.

Place-of-Supply in One Breath (and Why CAHT Stays Steady)

Canada’s place-of-supply rules decide which tax rate applies based on where your customer is considered to receive the supply. For goods, the place is usually where the item is delivered. For services and intangibles, it often follows your customer’s address, with tie-breakers if you have multiple addresses on file. These rules determine the tax rate, but they never change your CAHT. The before-tax price of your product is the same; only the tax layer changes as your customer’s province changes.

A Provincial/Territorial Snapshot for Calculations

Here’s a compact view to anchor your invoicing math. Always verify current rates and rules, but as a practical guide:

Province/Territory	Federal/Provincial Sales Tax	Combined Rate	Applied On
Alberta	GST only	5%	CAHT
British Columbia	GST + 7% PST	12% (typically)	Each applied to CAHT
Manitoba	GST + 7% RST	12% (typically)	Each applied to CAHT
Saskatchewan	GST + 6% PST	11% (typically)	Each applied to CAHT
Ontario	HST	13%	CAHT
Quebec	GST + 9.975% QST	About 14.975% (separate)	Each applied to CAHT
NB, NL, NS, PE	HST	15%	CAHT
Yukon, NWT, Nunavut	GST only	5%	CAHT

How to Calculate CAHT and Taxes, Step by Step

CAHT is the anchor; tax is the layer. Here’s the approach:

1. Set your selling price before tax. That’s your CAHT.
2. Determine the place-of-supply and the applicable tax rate(s).
3. Calculate tax on the CAHT amount per applicable tax. Don’t stack QST on GST.
4. Sum CAHT + taxes for the total to collect (TTC).

Example 1: $100 CAHT sale to a Toronto customer (HST at 13%). HST = $13. Total = $113 TTC.

Example 2: $100 CAHT sale to a Montreal customer. GST = $5; QST = $9.98 (9.975% of $100). Total ≈ $114.98 TTC.

Example 3: $100 CAHT sale to a Vancouver customer. GST = $5; PST = $7. Total = $112 TTC.

Discounts, Returns, Deposits, and Oddities

Business reality isn’t a straight line. Here’s how common wrinkles interact with caht:

• Discounts at the point of sale: Taxes apply to the discounted CAHT. Offer 10% off a $100 item in Ontario? New CAHT is $90; HST is $11.70; total $101.70 TTC.
• Rebates or credits after invoicing: Issue a credit note to reduce CAHT and associated tax. Your remittance later reflects the adjustment.
• Returns: Same principle—credit the CAHT and the tax so customers get back the tax they paid.
• Shipping and handling: Usually taxable at the same rate as the goods or services sold when you’re arranging the shipment. If the goods are zero-rated, shipping related to those goods is commonly zero-rated too.
• Gift cards: Selling the card isn’t taxable. Tax applies when the card is redeemed against specific taxable items.
• Tips and service charges: Voluntary tips aren’t subject to GST/HST or QST. Mandatory service charges generally are taxed like the sale.
• Deposits: True security deposits aren’t taxed when received. If later applied to the sale price, they become part of CAHT and trigger tax at that time.

Worked Examples Across Canada

Let’s nail the math with a few illustrations. Assume a $200 CAHT service unless noted otherwise.

• Halifax (HST 15%): Tax = $30. Total = $230 TTC.
• Ottawa (HST 13%): Tax = $26. Total = $226 TTC.
• Calgary (GST 5%): Tax = $10. Total = $210 TTC.
• Winnipeg (GST 5% + RST 7%): Tax = $10 + $14 = $24. Total = $224 TTC.
• Regina (GST 5% + PST 6%): Tax = $10 + $12 = $22. Total = $222 TTC.
• Vancouver (GST 5% + PST 7%): Tax = $10 + $14 = $24. Total = $224 TTC.
• Montreal (GST 5% + QST 9.975%): Tax = $10 + $19.95 ≈ $29.95. Total ≈ $229.95 TTC.
• Whitehorse (GST 5%): Tax = $10. Total = $210 TTC.

Each case starts from the same CAHT, then layers the applicable tax. Your CAHT doesn’t swing just because your customer is across a border; only the tax layer does.

Recording CAHT in Your Accounting System

Whether you use QuickBooks Online, Xero, Sage, Wave, or enterprise systems like Microsoft Dynamics or NetSuite, the rule is the same: record sales before tax in a revenue account, and record taxes in separate liability accounts. You collect taxes on behalf of governments—you do not earn them.

Practical setup tips:

• Create specific tax codes for each rate you charge: HST 13%, HST 15%, GST 5%, QST 9.975%, BC PST 7%, SK PST 6%, MB RST 7%, and combinations. Good systems already have these built-in for Canada—use them and keep them updated.
• Ensure invoice templates show line items, CAHT subtotal, each tax by name (e.g., HST, GST, QST, PST), and the grand total. Clarity avoids disputes and eases audits.
• Segregate revenue by product lines and, if helpful, by province. Even one extra pivot—say, “Revenue—Ontario” vs. “Revenue—Quebec”—helps reconcile to filings.
• Lock down posting rights to tax liability accounts. A stray journal entry can unravel your GST/HST or QST reconciliation.

Invoice Content: What CRA and Revenu Québec Expect

To support input tax credits (ITCs) and keep auditors happy, invoices need core details. Requirements vary with invoice size, but best practice is to include:

• Supplier legal name and address
• Supplier GST/HST registration number (and QST number if charging QST)
• Invoice date and unique invoice number
• Buyer’s name (especially for larger invoices), address if available
• Description of goods or services
• CAHT per line or as a subtotal
• Each tax listed separately with rate and amount
• Total amount due (TTC)

If you’re invoicing Quebec consumers, remember language rules: consumer-facing documents in Quebec must be available in French. Many businesses use bilingual invoice templates (French/English) to keep life simple. If you’re B2B, English-only invoices are common, but providing French in Quebec remains a strong practice.

CAHT and Your Tax Filings

When you file GST/HST or QST returns, governments want your CAHT. They also want to see the tax you collected and the tax you paid on inputs (to determine your net remittance). Here’s how caht threads through the forms.

GST/HST

On the GST/HST return, you’ll typically report:

• Total sales and other revenue (line sometimes labeled 101), excluding GST/HST—that’s your CAHT plus exempt sales.
• Tax collected or collectible (GST/HST on your taxable supplies).
• Input tax credits (ITCs) for GST/HST you paid on business purchases.

Most businesses must register when they cross $30,000 in worldwide taxable supplies (CAHT) over the last four consecutive calendar quarters. Charities and many other public service bodies have a higher small supplier threshold (commonly $50,000). If you’re under the threshold, registration is optional—but voluntary registrants can usually claim ITCs, which may be beneficial if you have meaningful input tax.

QST

If you make taxable supplies in Quebec, you may need to register for QST and file returns. The return asks for sales excluding QST (and excluding GST when the QST is calculated), tax collected, and input tax refunds (ITRs) analogous to ITCs. Quebec offers harmonized filing for businesses with operations there—you might file both GST/HST and QST through Revenu Québec when you’re based in Quebec.

Quick Method: How It Interacts with CAHT

Under the GST/HST Quick Method, eligible small businesses charge tax at the usual rates but remit a reduced percentage of their taxable sales (CAHT) instead of claiming ITCs on most inputs. It’s meant to simplify bookkeeping and sometimes lowers net remittances. Eligibility hinges on your CAHT (plus zero-rated supplies) staying below a certain cap over four consecutive quarters. Quebec has a similar quick method for QST. If you elect this method, your invoicing doesn’t change—only your remittance calculation does.

Revenue Recognition: CAHT vs. Net Revenue (Principal or Agent)

CAHT is about before-tax sales. Net revenue is a different question: do you record the gross selling price as revenue, or do you net out platform commissions and only record your take? Under accounting standards (IFRS 15 or ASPE guidance), you analyze whether you’re a principal (you control the good/service before transfer) or an agent (you arrange for someone else to provide it). If you’re a principal, you usually record gross CAHT as revenue and platform fees as expenses. If you’re an agent, you may record only your commission as revenue—your CAHT then reflects the smaller amount.

Marketplace reality check:

• Amazon.ca: Often collects GST/HST/QST on your behalf, but you still need to determine whether your revenue is gross (principal) or net (agent) and ensure your tax reporting aligns with the platform’s collection.
• App stores: Apple or Google may be the merchant of record. Your CAHT might be your developer proceeds, not the app’s list price. Documentation matters.
• Rideshare or delivery platforms: Collection and remittance of GST/HST/QST by the platform is common; your CAHT likely equals your portion. Verify contracts.

Sector-Specific Realities

Retail and E-Commerce

Retailers live in price tags and point-of-sale systems. Your CAHT is the shelf price before tax; your register should apply the correct provincial tax rates. For e-commerce, make sure your checkout displays estimated taxes clearly by province. If you offer “tax-included” promotions, your posted price already includes tax; to calculate CAHT, divide the total by 1 + tax rate. For example, a $113 total in Ontario implies CAHT of $100 (113 / 1.13), HST of $13.

Common pitfalls:

• Wrong place-of-supply when shipping to another province; check the delivery address, not the billing address, for goods.
• For Quebec customers, charging only GST but forgetting QST registration once you pass relevant thresholds.
• Mistreating platform fees: payment processor fees don’t reduce CAHT; they’re expenses.

Restaurants and Hospitality

In restaurants, CAHT is the menu price before tax. Mandatory service charges are taxed; voluntary tips are not. Alcohol is taxed like other goods (though provincial markups and bottle deposit programs can complicate your cost of goods). If you advertise “tax-included” combos, your POS should back-calculate CAHT and taxes properly to keep filings accurate.

Construction and Trades

Place-of-supply for services can be tricky. Installation work follows where the work is performed. Invoices should separate labour and materials if their tax status differs. Holdbacks under construction lien rules affect cash flow but not the CAHT of the contract. If you invoice progress draws, calculate tax on each draw’s CAHT at the time of billing, then adjust for change orders via credit/debit notes.

Professional Services

Consultants, designers, accountants, photographers—your place-of-supply usually follows your customer’s address in Canada. Track where your clients are located so your billing applies the correct tax rates. If you have U.S. clients and perform services for a non-resident with no Canadian consumption, your service may be zero-rated. In that case, CAHT is your full fee, tax is 0%, and you may claim ITCs on related inputs if you’re registered.

SaaS and Digital Products

Digital supplies face expanded registration rules. Since mid-2021, non-resident platforms and vendors that sell to Canadian consumers may need to register and collect GST/HST or QST under simplified regimes. Canadian SaaS companies selling across provinces must still apply the right tax rate to Canadian customers. Your CAHT is your subscription price; taxes layer per the customer’s province. Keep your billing system updated with rates and the logic to handle address changes and tax-exempt customers (e.g., if you serve charities with special status).

Charities and Nonprofits

Many supplies by charities are exempt; others can be taxable depending on the activity (e.g., commercial activities carried on by a charity). Small supplier thresholds can differ from standard businesses; many public service bodies have a $50,000 threshold. If you’re registered, your invoices should show CAHT and tax where applicable. Don’t forget public service body rebates for a portion of GST/HST or QST paid—rebates are separate from ITCs and depend on your status.

Interprovincial and Cross-Border Sales

Sales to Other Provinces

For goods, tax based on the destination province. For services and intangibles, apply place-of-supply rules using the customer’s address and other tie-breakers. Your CAHT remains the same; the tax type and rate change. Keep customer addresses current and store the evidence—you’ll need it if a province questions your rate choice.

Exports and Sales to Non-Residents

Exports of many goods and some services to non-residents are zero-rated. That means CAHT is your entire invoice amount, tax is 0%, and you may claim ITCs. But “non-resident” and “consumed outside Canada” are legal tests—be careful. Digital supplies to Canadian consumers are often taxable even when the supplier is abroad, and platforms may collect on your behalf.

Marketplace Facilitators

Platforms increasingly collect and remit taxes for you. That doesn’t eliminate your need to understand CAHT. Check:

• What does the platform collect (GST/HST, QST, PST)?
• Are you the principal or an agent for revenue recognition?
• How does the platform report your gross sales and tax collected?

Your filings must match reality. If a platform collects QST on your Quebec sales, you may still need to register for GST/HST based on your Canadian activity elsewhere.

Pricing: CAHT vs. Tax-Included (TTC) in the Canadian Context

Most Canadian retailers display pre-tax prices and add tax at checkout. Some sectors and promotions use tax-included (TTC) pricing for simplicity. If you choose TTC, ensure your systems back-calculate CAHT accurately for each province. Why? Because you file based on CAHT, not TTC. For a tax-included $19.99 price in Ontario, your CAHT is $17.69 (19.99 / 1.13) and HST is $2.30. In Quebec, the split would be different because you’re applying two taxes—$19.99 divided by 1.14975 gives CAHT ≈ $17.39, GST ≈ $0.87, QST ≈ $1.73.

Quebec consumer law expects prices to include all mandatory charges a consumer must pay, with sales taxes typically still added at the register for most goods and services (some sectors differ). Display practices vary; the safe path is to make the total price crystal clear before purchase—online and in-store.

Controls, Audits, and Common Mistakes

Most tax headaches aren’t about malice; they’re about messy processes. Here’s how to keep CAHT and taxes aligned and defensible:

• Reconcile monthly. Match your sales reports (CAHT by province) to your tax liability accounts and draft filing numbers. Resolve differences while they’re fresh.
• Lock your tax codes. Only a few people should create or edit tax codes in your system. Misconfigured rates spread quickly and quietly.
• Archive invoices and credit notes. CRA and Revenu Québec both want to see the document trail, especially for big refunds and adjustments.
• Train your team. Front-of-house, e-commerce ops, and accounting should agree on what’s taxable, how discounts are applied, and when to issue credit notes.
• Watch thresholds. Keep an eye on your CAHT rolling four-quarter totals for GST/HST, QST, and any PST thresholds. It’s easy to tip over $30,000 without noticing.
• Don’t treat tax as revenue. Segregate it as a liability. It clarifies cash flow and reduces the risk of remitting short.

Three Canadian Scenarios to Make It Concrete

1) Toronto Café Expanding to Online Sales

The café sells $8 lattes and $4 muffins in-store (HST province). CAHT is menu price; HST is 13%. They start an online store shipping branded mugs across Canada. Now, CAHT for mugs stays the same, but the tax applied hinges on the customer’s province: 15% HST to Halifax, 5% GST + 7% PST to Vancouver, 5% GST + 9.975% QST to Montreal. The café’s POS and e-commerce system must handle address-based tax and show CAHT + tax on invoices consistently. Monthly, they reconcile CAHT by province to file HST and, if registered, QST.

2) Vancouver Contractor Doing Work in Saskatchewan

The contractor sells a $25,000 CAHT installation job performed entirely in Regina. PST rules look at where the work occurs; GST is federal. The invoice shows $25,000 CAHT, $1,250 GST, and $1,500 SK PST. The contractor registered for SK PST because they cross in-province thresholds. Change orders are handled with add-on invoices; a change order credit uses a credit note that reverses CAHT and taxes appropriately.

3) Montreal SaaS Startup Going National

The startup charges $49/month CAHT for Canadian customers. Their billing system flags customer province by principal place of business. Quebec customers: GST 5% + QST 9.975%. Ontario customers: 13% HST. Alberta customers: 5% GST. Their CAHT is always $49; tax layers differ. They elected the GST/HST Quick Method to simplify remittances and run separate QST filings through Revenu Québec. When a U.S. company signs up, the service is exported and zero-rated—CAHT is $49, tax 0%, with ITCs still available on related expenses.

CAHT Calculation Pitfalls and How to Avoid Them

Even seasoned teams miss these:

• Stacking QST on top of GST. Don’t. Since 2013, QST is calculated on the CAHT, separately from GST.
• Treating platform commissions as a tax adjustment. They are not. Commissions and processor fees reduce margin, not CAHT.
• Ignoring zero-rated exports. They count toward taxable supplies for thresholds and may entitle you to ITCs—log them carefully.
• Failing to issue credit notes. If you refund a customer but don’t issue documentation, your tax filings won’t match your bank outflows.
• Mixing up buyer address vs. shipping address. For goods, the destination matters; for services, the customer’s address generally drives place-of-supply.

CAHT, Income Tax, and Financial Statements

Income tax and sales tax are different lanes. For corporate income tax, you recognize revenue under accrual accounting unless you’re eligible for specific exceptions. CAHT is your revenue line; taxes collected are liabilities. Your income statement shows revenue before tax (CAHT), not revenue including GST/HST/QST. On your balance sheet, tax collected sits in current liabilities until remitted. If you use the Quick Method, your cost structure shifts slightly because you forego most ITCs and instead remit a percentage of CAHT; your income statement should reflect that policy choice.

Implementation Checklist: From Policy to Practice

• Document your tax policy by product and province: what’s taxable, what rate, and why (with references).
• Configure tax codes in your POS/e-commerce/accounting systems and test a sample of invoices per province.
• Standardize invoice templates: show CAHT, separate taxes with labels (GST/HST/QST/PST), and a clear total.
• Train staff on discounts, tips, shipping, and returns so CAHT and tax are handled consistently.
• Build a monthly reconciliation: CAHT by province vs. taxes collected vs. returns/credits vs. filings.
• Monitor thresholds using rolling four-quarter CAHT totals to catch registration triggers early.
• Review annually: confirm rates, place-of-supply logic, and platform collection arrangements.

Glossary: Turn Jargon into Plain English

• CAHT (chiffre d’affaires hors taxes): Revenue before tax. The base selling price you control.
• TTC (toutes taxes comprises): Total price including all applicable taxes.
• GST: Federal Goods and Services Tax (5%).
• HST: Harmonized Sales Tax in certain provinces (13–15%).
• QST: Quebec Sales Tax (9.975%), calculated on CAHT, separate from GST.
• PST/RST: Provincial/retail sales taxes in B.C. (7%), Saskatchewan (6%), Manitoba (7%).
• Zero-rated: Taxable at 0%; counts for thresholds and ITCs.
• Exempt: No tax charged; generally no ITCs on related purchases.
• ITC/ITR: Input tax credit (GST/HST) and input tax refund (QST) for tax paid on business inputs.
• Quick Method: Simplified remittance based on a percentage of CAHT instead of tracking most ITCs.

Resources to Keep Handy

You’ll never memorize it all, nor should you. Bookmark:

• Canada Revenue Agency (CRA): GST/HST rates, place-of-supply rules, small supplier thresholds, Quick Method guide.
• Revenu Québec: QST registration criteria, rates, documentation standards, simplified regimes for non-residents.
• Provincial finance or tax agencies: BC PST, SK PST, MB RST guidance and bulletins.
• Your accounting software’s Canadian tax configuration documentation.
• Your industry association’s tax briefs—especially helpful for niche issues (e.g., restaurants, construction, SaaS).

Frequently Asked Questions about CAHT in Canada

What does caht mean on a Canadian invoice?

CAHT means “chiffre d’affaires hors taxes,” the amount before tax. It’s your sale price excluding GST/HST and any applicable provincial taxes like QST or PST. The taxes are then listed separately to reach the total price including tax (TTC).

Is CAHT the same as net revenue?

No. CAHT is before sales tax, but it’s typically gross of platform commissions or payment processing fees. Net revenue refers to what you report after evaluating whether you’re principal or agent, and after returns or certain reductions. You always exclude sales taxes from revenue.

How do I calculate CAHT if I only know the total price paid (tax-included)?

Divide the total by 1 plus the applicable tax rate(s). For HST at 13%, divide by 1.13. For Quebec, divide by 1.14975 (1 + 0.05 + 0.09975). The result is your CAHT; the difference is tax.

Do I charge QST on top of GST in Quebec?

No. Calculate GST and QST separately on CAHT. Since 2013, QST no longer applies to the GST-included amount.

What sales count toward the $30,000 small supplier threshold?

Your worldwide taxable supplies measured on a CAHT basis, including zero-rated sales, over the last four consecutive calendar quarters. Exempt sales (like many financial services or residential rent) don’t count. Public service bodies often have a $50,000 threshold.

Are shipping charges part of CAHT and are they taxable?

Shipping you bill to a customer is part of your invoice’s CAHT and is usually taxed at the same rate as the goods or services being shipped. If the underlying items are zero-rated, shipping related to those items is often zero-rated too.

Do I have to include taxes in my advertised prices?

Across most of Canada, retail prices are commonly displayed before tax, with tax added at checkout. In Quebec, consumer protection rules require the advertised price to include all mandatory charges the consumer must pay, though sales tax may still be added at the register in many cases. Always ensure the customer sees the final price before purchase.

How should tips be treated for CAHT and tax?

Voluntary tips aren’t subject to GST/HST or QST and don’t form part of CAHT. Mandatory service charges are taxable and included in CAHT.

How do returns and discounts affect my filings?

Issue credit notes to reduce CAHT and the associated tax. Your net tax remittance should reflect the reversal. For point-of-sale discounts, tax is computed on the reduced CAHT at the time of sale.

My marketplace collects tax. Do I still need to register?

Possibly. Platform collection doesn’t automatically remove your registration obligation, especially if you make other taxable supplies in Canada or exceed thresholds. You still need to understand your CAHT, how the platform reports sales and tax, and whether your filings are required.

Is software configuration enough to get CAHT right?

It’s a great start, but people and processes matter. Train staff, test invoices by province, monitor thresholds, and reconcile monthly. Good software plus disciplined practice keeps CAHT clean and compliant.

The Bottom Line

CAHT isn’t just a French label—it’s the backbone of how Canadian businesses price, invoice, and report. Treat your before-tax amount as the master figure. Let taxes layer on cleanly according to place-of-supply rules. Keep your documentation airtight, your systems aligned, and your reconciliations routine. Do that, and “caht” becomes a quiet constant in your business—reliable, boring, and exactly what you need when the month ends and the filings begin.