GST/HST Input Tax Credits: What Canadian Small Businesses Need to Know

If your business is registered for GST/HST, you can recover the tax you pay on business purchases through input tax credits (ITCs). This is one of the most valuable tax mechanisms for Canadian small businesses, but many freelancers and sole proprietors either do not register or do not track their ITCs properly.

What Are Input Tax Credits?

When you buy something for your business, you pay GST/HST on that purchase. An input tax credit lets you claim that tax back on your GST/HST return.

Example: You buy office supplies for $100 + $13 HST (Ontario) = $113 total. The $13 in HST you paid is your ITC. When you file your GST/HST return, that $13 comes back to you.

The principle is simple: GST/HST is meant to be paid by the final consumer. If you are a business buying inputs to produce goods or services, you are not the final consumer, so you get the tax back.

Do You Need to Register?

The $30,000 Threshold

You must register for a GST/HST account if your total taxable revenues exceed $30,000 over any four consecutive calendar quarters or in a single quarter.

Until you hit this threshold, you are considered a small supplier and registration is optional.

Should You Register Voluntarily?

Even if you are below $30,000, voluntary registration can make sense because:

• You can claim ITCs on all your business purchases
• You appear more professional to clients (especially B2B)
• If you mostly sell to other businesses, they can claim the GST/HST you charge as their own ITC (so it does not actually cost them anything)

The trade-off: you must charge GST/HST on your invoices and file regular GST/HST returns.

When it does not make sense: If your clients are primarily individual consumers (not businesses), adding 5-15% to your prices may make you less competitive, and the ITCs you recover may not offset the administrative burden.

How Tax Rates Work Across Provinces

The rate you charge depends on where your customer is located (for services) or where goods are delivered:

Province/Territory	Tax	Rate
Alberta, Nunavut, NWT, Yukon	GST	5%
British Columbia, Saskatchewan, Manitoba	GST + PST	5% + 6-7%
Quebec	GST + QST	5% + 9.975%
Ontario	HST	13%
New Brunswick, Newfoundland, Nova Scotia, PEI	HST	15%

Important: You can only claim ITCs for the GST/HST portion. PST and QST paid on purchases have different rules. PST is generally not recoverable. QST has its own input tax refund system through Revenu Quebec.

What Qualifies for ITCs?

You can claim ITCs on GST/HST paid for goods and services used in your commercial activities. This includes:

• Office supplies and equipment
• Professional services (accounting, legal, consulting)
• Software subscriptions
• Advertising and marketing
• Vehicle expenses (business portion)
• Travel expenses (hotels, flights, car rentals)
• Meals and entertainment (the 50% limit applies to both the expense deduction and the ITC -- you can only claim 50% of the GST/HST paid as an ITC)
• Rent for business premises

What Does Not Qualify

• Personal expenses (even if paid through a business account)
• Expenses for exempt supplies (certain financial services, residential rent, health care)
• Club membership dues (golf clubs, fitness clubs) — the GST/HST on these is specifically excluded
• Expenses where you did not actually pay GST/HST (zero-rated supplies, purchases from non-registrants)

How to Track ITCs

For each business purchase, you need to record:

1. The GST/HST amount paid (separate from the base price)
2. The supplier's GST/HST registration number (required for purchases over $30)
3. The date, amount, and description of the purchase

Documentation Requirements

The CRA has tiered documentation requirements based on the purchase amount:

Under $100:

• Vendor name
• Date
• Total amount paid

$100 to $499.99:

• All of the above, plus
• GST/HST registration number of the vendor
• GST/HST amount paid (or statement that tax is included)

$500 and over:

• All of the above, plus
• Buyer's name or trading name
• Terms of payment
• Description sufficient to identify the goods or services

Practical tip: Always get an itemized receipt. Most receipts over $30 will include the vendor's GST/HST number. If they do not, ask for it or note it from their invoice.

Filing Your GST/HST Return

When you file, the basic calculation is:

GST/HST collected (from your sales) minus ITCs (from your purchases) = Net tax

• If the result is positive, you owe the CRA the difference
• If the result is negative (your ITCs exceed your collected GST/HST), the CRA sends you a refund

Filing Frequency

The CRA assigns a filing frequency based on your annual revenue:

Annual Revenue	Default Filing
Under $1.5M	Annual
$1.5M to $6M	Quarterly
Over $6M	Monthly

You can elect to file more frequently if you want faster ITC refunds. Many small businesses with high input costs choose quarterly filing even when annual is available.

The Quick Method

The CRA offers a simplified "Quick Method" for small businesses with annual taxable supplies of $400,000 or less (excluding zero-rated supplies and financial services). Under the Quick Method:

• You collect GST/HST at the normal rate
• You remit a reduced percentage (varies by province, roughly 3.6% for service businesses)
• You do not claim ITCs (except on real property purchases such as land and buildings)

The Quick Method can save money if your business has low input costs (consulting, freelance services) because the remittance rate is lower than the actual GST/HST rate. But if your business has high input costs (materials, subcontractors, equipment), the regular method with full ITCs is usually better.

Common Mistakes

1. Not registering when you should. Once you cross $30,000, registration is mandatory. Failing to register means you still owe the GST/HST you should have collected, but now without having charged it to your clients.
2. Claiming ITCs on personal expenses. The CRA cross-references expense patterns. A vehicle expense ITC claim with no logbook is a red flag.
3. Missing the vendor's registration number. For purchases over $30, you need the vendor's GST/HST number on the receipt to claim the ITC. Without it, the CRA can deny the credit.
4. Forgetting about mixed-use assets. If your phone is 60% business, your ITC is 60% of the GST/HST paid, not 100%.
5. Not tracking ITCs per expense. Many freelancers calculate ITCs at year-end by estimating. The CRA expects per-transaction tracking with supporting receipts.

Sources

1. CRA Guide RC4022 - General Information for GST/HST Registrants
2. CRA Input Tax Credits
3. CRA GST/HST Registration
4. CRA Quick Method of Accounting
5. CRA GST/HST Rates by Province
6. Excise Tax Act, Section 169 - Input Tax Credits