What Business Expenses Qualify for HST Input Tax Credits in Ontario

Knowing you can claim input tax credits is one thing; knowing which specific expenses actually qualify is where most of the practical questions come up. Ontario business owners often assume every dollar spent on the business generates an equal input tax credit — in reality, the category of expense, and how it's used, both matter.

This guide organizes common expense categories into what generally does and doesn't support an ITC claim, along with the grey areas worth double-checking with your accountant.

As always, the specific facts of a purchase — how it's used, who it's from, and what documentation you have — control the outcome more than the general category does.

Expenses That Generally Qualify

• Office and business supplies used in day-to-day operations
• Professional fees — legal, accounting, and consulting fees related to the business
• Commercial rent for business premises
• Equipment and machinery used in commercial activity
• Advertising and marketing costs
• Software subscriptions and technology used for business purposes
• Business insurance premiums, where HST applies to the premium

Expenses That Generally Don't Qualify, or Are Restricted

• Purchases used for exempt supplies. If part of your business makes exempt sales — certain financial or health services, for example — inputs tied to that exempt activity generally don't generate an ITC.
• Personal-use purchases. Anything bought for personal use, even by the business owner, doesn't qualify just because the company paid for it.
• Meals, entertainment, and certain vehicle expenses. These categories are treated differently and typically only support a partial credit rather than a full one — covered in more depth in our companion article on restricted input tax credits.
• Purchases from unregistered suppliers. If the supplier didn't charge HST because they aren't a registrant, there's no HST paid to recover in the first place.

The Mixed-Use Problem

Many real-world expenses fall into a grey zone: a vehicle used for both client visits and personal errands, a phone plan used for both business and family calls, a home office used for both work and living. In these situations, only the portion of the expense genuinely attributable to commercial use generally supports an ITC — the personal-use share doesn't. Keeping a reasonable, documented basis for the split, such as mileage logs or usage percentages, matters more than picking a specific number out of the air.

Grey-Area Categories Worth a Second Look

A few categories don't fit neatly into "generally qualifies" or "generally doesn't" and deserve extra attention:

• Startup costs incurred before formal registration. Depending on timing and circumstances, some pre-registration expenses may or may not support a later ITC claim — this is a facts-specific question worth confirming rather than assuming either way.
• Subscriptions and memberships with a personal-enjoyment component. A professional-association membership fee looks different from a recreational or dining club membership, even though both are "memberships" — the nature of the benefit matters.
• Gifts and promotional items given to clients. These sit close to the entertainment category in some cases and deserve the same careful categorization.
• Home-based business expenses. Similar to the home-office deduction for income tax purposes, only the business-use share of home-related costs generally supports an ITC, and the allocation method needs to be defensible.

A Quick Self-Check Before You Claim

• [ ] Is the expense connected to your commercial activity, not your personal life?
• [ ] Did the supplier actually charge HST, and can you show it?
• [ ] If the expense is mixed-use, have you allocated a reasonable business-use portion?
• [ ] Does the expense fall into a restricted category, like meals or vehicles, that may only support a partial credit?

Frequently asked questions