Is Interest on a Business Credit Card Deductible in Canada?

What Small Business Owners Need to Know

If you own a small business in Canada, you probably have a business credit card.
You may wonder whether the extra money you pay, called interest, can be taken off your taxes.

The short answer is yes, sometimes. This article explains when and how to claim the deduction correctly.

What Is Credit‑Card Interest?

Interest is the cost you pay when you do not clear your whole balance by the due date.

Example:

• You buy office paper for $500.
• You pay $400 on time.
• The bank adds interest on the $100 you still owe.

Interest only appears when you carry a balance. If you pay the full amount each month, you pay no interest.

Finlywealth highlights more details on How Credit Card Interest Works in Canada.

When Is the Interest Deductible?

The Canada Revenue Agency (CRA), lets you deduct interest only if three things are true:

1. The purchase is for your business.
2. The interest is paid to a bank or a lender (not a friend or a family member).
3. The expense is reasonable and needed for the business to run.

Learn more: Can I Use a Personal Credit Card for Business Expenses in Canada?

Deductible Examples

Non‑Deductible Examples

The CRA’s official list can be found here: Business Expenses – CRA.

Learn more: Canadian Business Credit Cards and Tax Deductions Explained

How to Claim Your Interest Deductions Properly

Keep Business and Personal Spending Separate

Mixing money makes it hard to prove which interest is business‑related. You should:

• Use one credit card only for business.
• Use a different card (or a personal debit card) for personal needs.

The FCAC also recommends separate accounts. 

Track Every Interest Payment

Keep track of every interest payment, it’s required at tax time. These record-keeping tips can help:

1. Check your statement each month. Look for the line that says “Interest Charged.”
2. Write the amount in a spreadsheet or a bookkeeping app.
3. Save the whole statement—digital PDFs work well.

Software like Wave, QuickBooks, or Zoho Books can pull interest totals automatically.

Link Interest to a Business Purchase

You can only claim interest that belongs to a business purchase.

How to prove it

• Keep the receipt for the original purchase.
• Mark the receipt with “Business” in a bright pen.
• Keep the receipt together with the monthly statement that shows the interest.

If you ever get an email from the CRA, you will have the proof ready.

Report the Interest on Your Tax Return

When it is time to file, follow these steps:

1. Add up all the interest you paid for business purchases during the tax year.
2. Enter the total on the line for “Interest and bank charges” in the T2125 form (Statement of Business Activities).
3. Attach a copy of your statements and receipts if the CRA asks.

Common Mistakes and How to Fix Them

How the Deduction Affects Your Taxes

Deductible interest lowers your taxable income.

Example:

• You paid $1,200 in interest for the year.
• Your business earned $30,000 before tax.
• After the deduction, the CRA sees $28,800 as income.

You pay tax on the lower amount, which can mean hundreds of dollars saved.

Remember, the deduction is only allowed if the interest is reasonable and directly tied to a business purchase.

Final Thoughts

Interest on a business credit card can be a useful tax tool for Canadian small business owners. But don’t rely on it, interest still costs you money, even if it’s deductible.

Use one business card to start, and only add more when needed. Keep business and personal spending separate, and ask suppliers if they report to credit bureaus—this can help build your business credit profile.

Follow these simple steps to track and claim your interest deductions properly:

1. Keep business and personal cards separate.
2. Track every interest charge.
3. Link interest to the appropriate business purchase.
4. Report the total on the T2125 form.
5. Keep all receipts and statements safe.

Doing this helps you stay organized, avoid CRA problems, and keep more money in your pocket.

Explore more on Finlywealth’s list of top business credit cards: 8 Best Business Credit Cards in Canada.