You can claim business expenses when you haven’t yet started earning income, providing that you are actually generating those expenses to earn income. The expenses must be reasonable, and you must have receipts & logs to back up the amounts you claim (should the CRA ask). It also helps if you have other documentation to show that your business is real. A business plan, advertising you had printed up, etc. - things that show that you are genuinely going into business, even if you haven't earned anything yet.
An article on When Can I Claim Business Expenses?: https://turbotax.intuit.ca/tips/when-can-i-claim-business-expenses-1213
An article on Deductible Business Start-Up Costs: https://turbotax.intuit.ca/tips/deductible-business-start-up-costs-6184
You can claim business expenses when you haven’t yet started earning income, providing that you are actually generating those expenses to earn income. The expenses must be reasonable, and you must have receipts & logs to back up the amounts you claim (should the CRA ask). It also helps if you have other documentation to show that your business is real. A business plan, advertising you had printed up, etc. - things that show that you are genuinely going into business, even if you haven't earned anything yet.
An article on When Can I Claim Business Expenses?: https://turbotax.intuit.ca/tips/when-can-i-claim-business-expenses-1213
An article on Deductible Business Start-Up Costs: https://turbotax.intuit.ca/tips/deductible-business-start-up-costs-6184