Can you claim Google Ads for an affiliate website in Canada?

Yes—if your affiliate website is a genuine income-earning business in Canada, Google Ads can generally be treated as a business expense. The key question is whether the spending was made to earn business income and is reasonable in amount.

A few practical points:

• Keep invoices/receipts and records showing the ads were for your affiliate business.
• If you’re GST/HST registered, you may be able to claim input tax credits on eligible tax paid, depending on the specific rules that apply to your situation.
• The exact tax treatment can vary based on your business structure and facts, so if the amount is significant, it’s worth confirming with a Canadian tax professional or checking the CRA guidance.

Bottom line: for a real affiliate business, Google Ads is often deductible in Canada, but you should keep proper documentation and verify the details for your situation.