If the Canada Revenue Agency (CRA) denies your Input Tax Credits (ITCs) due to invalid invoices, you can fight back. You generally have exactly 90 days from the date of your Notice of Assessment to file a formal Notice of Objection.
Running a business in Canada requires meticulous record-keeping, especially when it comes to the Goods and Services Tax (GST) and Harmonized Sales Tax (HST). When you purchase goods or services for your commercial activities, you can claim Input Tax Credits (ITCs) to recover the sales tax you paid. However, the Canada Revenue Agency (CRA) conducts strict audits and frequently denies these ITCs if your paperwork is not absolutely perfect.
A denied ITC means your business is suddenly on the hook to repay thousands of dollars, plus interest and penalties. 🔍 This usually happens because a supplier provided an invoice with a missing, incorrect, or entirely fake GST/HST registration number. Whether your business operates in Toronto, Vancouver, Calgary, or Halifax, you have the legal right to challenge the CRA’s decision and recover your hard-earned money by filing an appeal.
Step-by-Step Process in Canada
Disputing a tax assessment is a federal matter handled entirely by the CRA and the Tax Court of Canada. The rules for claiming ITCs are strictly laid out in the federal Excise Tax Act, so the process remains the same regardless of which province your business is based in.
Step 1: Identifying the Reason for Denial
When the CRA auditor completes their review, they will send you a proposal letter outlining exactly which ITCs are being denied and why. 📄 The most common reason is non-compliance with the Input Tax Credit Information (GST/HST) Regulations. The CRA requires specific details on every invoice, such as the supplier’s exact legal name, the date of the transaction, the total amount paid, and a valid 9-digit GST/HST registration number ending in “RT0001”.
Step 2: Contacting Suppliers for Corrected Invoices
If your ITCs are denied because of an administrative error on a receipt, all hope is not lost. The Tax Court of Canada has generally ruled that taxpayers can obtain corrected invoices from their suppliers even after an audit has started. You should immediately contact the vendor, request an updated invoice containing the proper GST/HST number, and verify that number using the CRA’s free online GST/HST Registry.
Step 3: Filing the Notice of Objection
If the auditor refuses to accept your corrected documents and issues a formal Notice of Reassessment, you must take official legal action. 💼 You must file a Notice of Objection (Form GST159) within 90 days of the assessment date. This moves your file out of the auditor’s hands and transfers it to the CRA Appeals Division, where an independent appeals officer will review your evidence and your legal arguments.
Step 4: Escalating to the Tax Court of Canada
Sometimes, the CRA Appeals Division will uphold the auditor’s decision and confirm the denial of your ITCs. If this happens, your final option is to file a Notice of Appeal with the Tax Court of Canada. This is a formal legal proceeding where a judge will hear your case. For complex GST/HST matters, retaining a Canadian tax lawyer is highly recommended to present a strong defence based on previous case law.
How Much Does it Cost in Canada?
Fighting the CRA can be a resource-intensive process, and you need to weigh the costs against the amount of ITCs denied. 💰 As of May 2026, here are the estimated costs in Canadian Dollars (CAD) if you choose to hire professional representation:
- Notice of Objection Filing: The CRA does not charge a government fee to file an objection.
- Tax Lawyer or CPA Fees (Objection Phase): Hiring a professional to draft and manage your Notice of Objection generally costs between $2,500 and $7,500 CAD.
- Tax Court Filing Fee: To file an appeal under the General Procedure, the court fee ranges from $250 to $550 CAD depending on the amount in dispute.
- Tax Court Representation: Taking a case to a full trial at the Tax Court of Canada typically starts around $15,000 CAD and can exceed $40,000 CAD for highly complex corporate disputes.
| Dispute Stage | Estimated Cost (CAD) | Payable To |
|---|---|---|
| Notice of Objection (CRA) | $0 (No Gov Fee) | N/A |
| Professional Prep (Objection) | $2,500 – $7,500 | Law Firm / CPA |
| Tax Court Filing Fee | $250 – $550 | Receiver General |
| Tax Court Litigation | $15,000 – $40,000+ | Law Firm |
How Long Does the Process Take?
Resolving a tax dispute with the CRA requires extreme patience. ⏱️ Once you file your Notice of Objection, it usually takes the CRA Appeals Division between 6 and 12 months simply to assign your file to an appeals officer due to massive federal backlogs. If you must escalate the matter to the Tax Court of Canada, the entire litigation timeline-from filing the appeal to getting a judge’s decision-routinely takes between 18 and 36 months.
Frequently Asked Questions (FAQ)
Do I have to pay the CRA while I am appealing?
Generally, for GST/HST disputes, the CRA has the legal power to collect the debt even if you have filed a Notice of Objection. It is often recommended to pay the disputed amount to stop high daily interest charges from accumulating, as the CRA will refund you with interest if you win your appeal.
What happens if I miss the 90-day deadline?
If you miss the strict 90-day deadline to file a Notice of Objection, you can apply for an extension of time within one year of the deadline passing. However, you must prove you had a very valid reason for the delay, such as severe illness or a natural disaster.
Can I claim ITCs if my supplier gave me a fake GST number?
If your supplier knowingly gave you a fraudulent GST/HST number, the CRA will deny your ITCs. However, Canadian courts have sometimes ruled in favour of taxpayers if they can prove they practiced strict “due diligence” to verify the supplier’s identity before paying the invoice.
Can my accountant represent me in Tax Court?
A Chartered Professional Accountant (CPA) can represent you during the CRA audit and objection stages. However, if your case proceeds to the Tax Court of Canada under the General Procedure (for disputes over $50,000), a corporation must be represented by a licensed Canadian lawyer.
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