Simplified ITC Method

Definition

The Simplified ITC Method is an optional calculation under the Streamlined Accounting (GST/HST) Regulations that lets an eligible small registrant determine its total Input Tax Credits for a reporting period by multiplying its total tax-included eligible purchases by a fraction matching the applicable rate, rather than isolating the GST/HST shown on each individual receipt. The underlying ITC entitlement under ETA s.169 is unchanged; only the arithmetic is simpler.

Key rules

• Eligibility: annual worldwide taxable supplies (plus associates) must not exceed $1,000,000 in the preceding fiscal year and in the completed preceding fiscal quarters of the current year, with the prescribed exclusions. Taxable purchases made in or imported into Canada (excluding zero-rated purchases) must not exceed $4,000,000 for the preceding fiscal year. Public service bodies must also expect taxable purchases in the current fiscal year to stay at or under $4,000,000, a charity can use the method only after electing out of the net tax calculation for charities, and listed financial institutions cannot use it.
• No election form is filed (ETA s.227(4.2)). The method starts on the first day of a reporting period, and once started it must be used for at least one year while the registrant still qualifies (ETA s.227(4.1)).
• Calculation: separate purchases by tax rate, total each group including the GST/HST (and, for purchases that bore only the 5% GST, any non-refundable provincial sales tax such as BC PST), and multiply by the corresponding fraction.

• Eligible purchases follow commercial-use rules. Generally exclude the personal or exempt share, but CRA permits the full price at 90% or more commercial use, and the capital personal-property rules below differ. Non-claimable items (50% disallowed meals, club memberships) must also be excluded.
• Documentary requirements under section 3 of the Input Tax Credit Information (GST/HST) Regulations still apply. The simplification affects the math, not the records.
• Capital personal property, and improvements to it, goes into the simplified calculation if it is used more than 50% in commercial activity (primary-use test). Purchases and leases of real property, including capital real property, stay out of the total: their ITCs are worked out the regular way and added to the simplified result.

Example

A BC corporation that delivers services into BC, Ontario, and New Brunswick tallies its eligible tax-included purchases for Q2 2026:

Purchases on which 5% GST was paid (BC vendors):   $21,000
Purchases on which 13% HST was paid (ON vendors):   $6,780
Purchases on which 15% HST was paid (NB vendors):   $2,300

Simplified ITC calculation
5/105 × $21,000                                  $1,000.00
13/113 × $6,780                                    $780.00
15/115 × $2,300                                    $300.00
Total ITCs on line 108                           $2,080.00

If 20% of the BC purchases were personal-use, the BC figure would first be reduced to $16,800 before applying the 5/105 fraction, yielding $800 of ITCs instead of $1,000.

Common mistakes

• Applying the 5/105 fraction to a tax-exclusive total. The Simplified Method assumes the figure includes GST/HST.
• Mixing rates in one pool. ON purchases at 13% and BC purchases at 5% must be totalled separately before their own fractions are applied.
• Forgetting to strip out the 50% non-deductible portion of meals and entertainment, or inputs used for exempt supplies.
• Using the method despite exceeding the $1M revenue or $4M purchase ceilings.
• Skipping source documents. The simplified math does not waive the documentary requirements of section 3 of the Input Tax Credit Information (GST/HST) Regulations.

Related concepts

The Simplified Method is one of three ITC approaches: it is the middle option between the regular line-by-line ITC claim and the flat Quick Method. Documentation must still meet the thresholds in section 3 of the Input Tax Credit Information (GST/HST) Regulations (less than $100, $100 to under $500, and $500 or more).