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A GST/HST assessment hits Canadian businesses where it hurts: denied input tax credits, reclassified supplies, the wrong provincial rate — and unlike income tax, the Canada Revenue Agency can collect the assessed amount while you dispute it. Our Canadian template produces a formal notice of objection under section 301 of the Excise Tax Act: filed with the Chief of Appeals within the hard 90-day window, with an issue-aware grounds framework, a supplier-by-supplier ITC documentation matrix, the specified-person compliance larger registrants must meet, a written payment posture, and the section 306 Tax Court of Canada route mapped.
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It is the formal dispute mechanism for GST/HST assessments in Canada. A registrant assessed for net tax, penalties or interest may file a notice of objection with the <strong>Canada Revenue Agency</strong> within <strong>90 days</strong> after the notice of assessment is sent (Excise Tax Act, s.301(1.1)) — and unlike individual income tax, there is no one-year alternative. A signed letter to the Chief of Appeals stating the facts and reasons is a complete objection; Form GST159 and "Register my formal dispute" in My Business Account are alternatives. In Quebec, Revenu Québec administers GST/HST and takes the objection instead.
The single most important difference from an income tax dispute is collection. There is no equivalent of the income tax collection hold for GST/HST: under the Excise Tax Act, assessed amounts are payable forthwith, and the CRA may garnish, set off refunds or otherwise collect <strong>even while the objection is outstanding</strong>. A Canadian business that files an objection and assumes the debt is paused can be blindsided by a requirement to pay on its bank. The objection therefore needs a payment posture in writing — pay under protest, arrange instalments, or ask collections to stay enforcement — and this template states it expressly.
Larger registrants carry an extra burden. A "specified person" — broadly, a business over $6 million in taxable supplies in the current and previous fiscal year, or a listed financial institution — must describe each issue, quantify the relief sought per issue as a change in an amount, and give the facts and reasons for each (s.301(1.2)). Issues not raised that way are generally barred from the Tax Court of Canada later (s.306.1). Most small businesses are not specified persons, but the template can draft to the higher standard on request — useful insurance when the threshold is close.
The letter follows the structure a CRA Appeals Officer works through for GST/HST — registrant, period, time limit, outcome, grounds, documentation — and adapts to the issue in dispute.
Choose denied input tax credits, supply classification, place of supply, the new housing rebate or s.280 penalties — the Expert grounds clause writes the matching Excise Tax Act framework.
The letter confirms filing within 90 days of the notice (s.301(1.1)) — and where the window has passed, adds the s.303 extension application with the statutory conditions argued.
A supplier-by-supplier table of the denied credits: invoice dates, amounts, and the documentation held against the $100 / $500 regulation tiers — with corrected invoices noted.
Positions each credit inside the s.225(4) window — generally four years for most Canadian registrants, two for specified persons and listed financial institutions.
States the rule most registrants learn too late: GST/HST amounts are payable forthwith and objection does not pause collection — then records your chosen payment posture.
Pay under protest (stops interest, refunded if you win), request a payment arrangement, confirm payment in full, or ask collections to hold enforcement — each in officer-ready wording.
For businesses over the $6 million threshold: each issue described, relief quantified per issue, facts and reasons given — preserving every issue for the Tax Court (s.306.1).
Notes a parallel penalty-and-interest relief request on the file, so amounts that should not stand are attacked on both tracks at once.
Records the appeal path: 90 days from the decision, the $50,000 informal procedure for GST/HST disputes, and the right to go straight to the Court after 180 days of CRA silence.
Five steps from assessment to filed objection.
You need the reporting period, the date on the notice of assessment and the reference number — plus your Business Number and RT account. The 90-day clock runs from the notice date.
Denied ITCs, classification, place of supply, the housing rebate or penalties — pick the dominant issue and state in two or three sentences why the assessment is wrong.
For ITC disputes, list each supplier, invoice and amount with the documentation held. A corrected or reissued invoice cures most documentation denials.
Decide before the CRA does: pay under protest, arrange instalments or request a hold — and put it in writing so the collections file shows it.
Mail the letter to the Chief of Appeals at the Appeals Intake Centre, or register the dispute in My Business Account and upload it. In Quebec, file with Revenu Québec instead. Keep a dated copy.
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Drafted with legal expertise for each jurisdiction, far more thorough than AI-generated drafts that copy generic clauses across borders.
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GST/HST disputes run on the Excise Tax Act's own clock and rules — several of them harsher than the income tax equivalents Canadians know better.
This template provides general information for Canadian registrants and is not tax or legal advice. For large assessments, specified-person files, or disputes entangled with director liability or trust-fund amounts, get advice from a Canadian GST/HST lawyer or CPA before filing.
Reviewed for Canadian tax law
A person assessed under Part IX may file a notice of objection within 90 days after the notice of assessment is sent, setting out the reasons and the relevant facts (s.301(1.1)). The Minister must then reconsider the assessment with all due dispatch and vacate or confirm it or reassess (s.301(3)). The objection goes to the Chief of Appeals — a letter is a valid filing, Form GST159 an alternative — and in Quebec the objection is filed with Revenu Québec, which administers GST/HST there.
For individual income tax, serving an objection restricts CRA collection. For GST/HST it does not: assessed net tax, penalties and interest are payable forthwith under the Excise Tax Act, and the CRA may issue a requirement to pay, set off refunds and credits, or certify the debt while the objection runs. Interest accrues throughout at the prescribed rate plus 4% — 7% per annum for the April–June 2026 quarter, compounded daily. The practical answers are payment under protest (refunded with interest on success) or a payment arrangement — see our CRA payment arrangement request template.
ITCs flow from s.169 of the Excise Tax Act for tax paid on inputs to commercial activities, but the Input Tax Credit Information (GST/HST) Regulations set documentation tiers — supplier identity below $100; plus the supplier's GST/HST registration number and the tax amount from $100; plus the recipient, terms and a description from $500. Most denials are documentation denials, and a corrected or reissued invoice cures the defect. The claim window is generally four years (s.225(4)); about two for specified persons and listed financial institutions.
A registrant whose taxable supplies exceeded $6 million in both the current and previous fiscal year — or any listed financial institution — must file to the higher s.301(1.2) standard: each issue reasonably described, the relief per issue quantified as a change in an amount, and facts and reasons for each. The CRA may request missing particulars with 60 days to comply, and issues not properly raised are generally barred on appeal (s.306.1). The template writes that compliance in, and can apply it protectively when the threshold is close.
If the Minister confirms or reassesses, the registrant may appeal to the Tax Court of Canada within 90 days (s.306). And if the CRA issues no decision within 180 days of filing, the registrant may appeal directly — a lever worth knowing when interest is compounding on a collectible debt. The informal procedure covers GST/HST disputes of $50,000 or less, or larger files that elect to cap the amount. For the income tax side of the same audit, use our CRA notice of objection template; for the penalties and interest, our CRA taxpayer relief request.
Create your GST/HST notice of objection in minutes: issue-aware grounds, the ITC documentation matrix, specified-person compliance and a written payment posture, in formal Canadian letter format. Download the PDF free, or unlock Expert for the matrix, collections and Tax Court sections.
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