Input Tax Credit (ITC) Guide for Canadian Businesses

For a GST/HST-registered business, the tax you pay on your own purchases is not necessarily a cost. Through Input Tax Credits (ITCs), the government lets you recover the GST/HST you paid on business expenses, so you only ever remit the net tax. Understanding ITCs properly can meaningfully improve cash flow — and getting them wrong is a common reason for reassessments. This guide explains how they work for 2026.

What Is an Input Tax Credit?

An ITC is the GST or HST you paid on goods and services bought for your business, which you claim back on your GST/HST return. The core idea of a value-added tax is that tax should only stick at the final consumer. Businesses in the middle collect tax on their sales and recover the tax on their purchases, remitting only the difference:

If you collected $5,000 of HST from customers and paid $1,800 of HST on business expenses, you remit $3,200 to the CRA — not the full $5,000.

Who Can Claim ITCs?

• You must be registered for GST/HST with the CRA. Registration is mandatory once taxable revenue exceeds $30,000 over four consecutive quarters, and voluntary below that.
• The expense must be for commercial activity — used to make taxable (or zero-rated) supplies, not exempt ones.
• You need documentation — a valid invoice or receipt showing the supplier's GST/HST number and the tax paid.
• Time limit: most businesses have up to four years to claim an ITC.

What You Can Recover — by Province

This is where the province matters enormously. Not every tax you pay is recoverable:

The PST trap: in British Columbia, Saskatchewan and Manitoba, only the 5% GST portion is recoverable — the provincial PST/RST is a permanent cost. On a $112 BC purchase ($100 + $5 GST + $7 PST), you can claim back only the $5 GST. Many new businesses mistakenly try to claim the full $12 and get reassessed.

Quebec's ITR

Quebec is generous here: because QST is a value-added tax, registered businesses recover both the GST (as an ITC) and the QST (as an Input Tax Refund, or ITR). On a $114.98 Quebec purchase, both the $5.00 GST and the $9.98 QST are typically recoverable — a real advantage over the PST provinces.

The 50% Meals & Entertainment Rule

One exception catches almost everyone: GST/HST on meals and entertainment is generally only 50% claimable as an ITC, mirroring the income-tax deduction limit. If you spend $113 on a client lunch in Ontario, the HST is $13, but you can only claim $6.50 as an ITC. Track these expenses separately so you don't over-claim.

How to Claim ITCs Step by Step

• 1 — Keep every business receipt showing the supplier's GST/HST number and tax paid.
• 2 — Total the recoverable GST/HST across all eligible purchases for the period.
• 3 — Apply the special rules — 50% on meals, GST-only in PST provinces.
• 4 — Enter total ITCs on line 108 of your GST/HST return.
• 5 — Remit the net (tax collected minus ITCs), or claim a refund if ITCs exceed tax collected.

How Often Do You File?

Your reporting period depends on revenue: annually for most small businesses (up to $1.5M in taxable sales), quarterly ($1.5M–$6M), and monthly (over $6M). You can also elect to file more frequently — useful if you're regularly in a refund position and want the cash sooner. Quebec businesses file a separate QST return with Revenu Québec.

The Quick Method Alternative

Small businesses (generally under $400,000 in annual taxable sales) can elect the CRA's Quick Method. Instead of tracking every ITC, you remit a reduced flat percentage of your tax-included sales and keep the difference. For many simple service businesses with few expenses, this is less work and can even save money — but you give up claiming most ITCs, so it's not right for businesses with large purchases.

Based on CRA rules for 2026. This is general information, not professional tax advice — ITC eligibility depends on your specific business. Confirm with the CRA or a qualified accountant before filing.