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Find a Lawyer » Canada Legal Guides » Money, Taxes & IP Canada » Deducting Bad Debts from Corporate Income in Canada (Section 20)

Deducting Bad Debts from Corporate Income in Canada (Section 20)

19 Jul 2026 5 min read No comments Money, Taxes & IP Canada
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Under Section 20 of the Income Tax Act, Canadian businesses can write off unpaid invoices as a bad debt, but only if they have exhausted all reasonable collection efforts. The debt must have been previously included in your corporate income, and the CRA expects documented proof that the money is truly uncollectible.

Dealing with clients who refuse to pay is one of the most frustrating parts of running a business. Unpaid invoices severely damage your cash flow, restrict your ability to pay your own staff, and to make matters worse, you may have already paid taxes on that phantom money if you use accrual accounting. Across Canada, from Halifax to Vancouver, businesses must navigate strict federal tax rules when they want to clear these unpaid bills from their financial books.

Fortunately, the Canada Revenue Agency (CRA) allows you to claim a deduction for bad debts to offset your corporate income under Section 20 of the Income Tax Act. 💸 However, you cannot simply cross out an invoice because a client is ignoring your phone calls or email reminders. You must follow a specific legal process to prove that the debt is completely uncollectible. This comprehensive guide outlines the exact steps to successfully claim a bad debt expense without triggering a costly CRA audit.

Step-by-Step Process for Writing Off Bad Debts in Canada

Writing off a bad debt requires a meticulously documented paper trail. The CRA wants to see that you actually tried to get your money before giving up. The process generally follows these strict federal guidelines for corporations and sole proprietors.

Step 1: Ensure the Revenue Was Included in Your Income

You can only claim a bad debt if the unpaid amount was already recorded as revenue in your current or a previous tax year. 📄 If you operate on a strict cash basis (like some farming or fishing businesses), you cannot claim a bad debt because you never recorded the income in the first place. Most Canadian corporations use accrual accounting, meaning the income is recorded at the moment the invoice is issued, which automatically satisfies this critical requirement.

Step 2: Exhaust All Reasonable Collection Efforts

The federal government requires concrete proof that the debt is genuinely uncollectible, not just difficult or annoying to collect. You must carefully document your active attempts to recover the funds. This includes sending multiple demand letters, making phone calls, setting up payment plans, and potentially cutting off all future services. Keeping a detailed, time-stamped log of every interaction is absolutely essential for your internal accounting records.

Step 3: Escalate to a Collection Agency or Corporate Lawyer

If standard reminders fail, you may need to escalate the matter to professionals. 🗒 Hiring a collection agency or having a business lawyer send a formal demand letter shows the CRA you are taking the matter seriously. If the client officially goes bankrupt, you should obtain a copy of the bankruptcy or receivership notice. If the client simply disappears, you must document that their business has closed down, their phone lines are disconnected, and they cannot be legally located.

Step 4: Record the Bad Debt and Adjust GST/HST

Once you conclusively determine the debt is a lost cause, you can write it off at your fiscal year-end. You will deduct the amount on your T2 Corporate Income Tax Return, or on your T2125 if you are a sole proprietor. Additionally, if you already remitted the GST/HST on that unpaid invoice to the government, you can safely claim a deduction for the uncollected tax on your next GST/HST return to recoup those lost funds.

How Much Does it Cost in Canada?

Trying to recover a bad debt before officially writing it off will incur some operational expenses. 💰 You must weigh these professional costs against the total size of the outstanding invoice to ensure it is financially worthwhile.

  • Collection Agencies: Most debt collection agencies in Canada charge a contingency fee, typically taking between 20% and 40% of whatever funds they manage to successfully recover.
  • Corporate Lawyer Fees: A business lawyer might charge anywhere from $250 to $500 CAD to draft and serve a formal legal demand letter on official law firm letterhead.
  • Small Claims Court: If you decide to sue the client, provincial court filing fees vary by jurisdiction, but generally range from $100 to $350 CAD depending on your province and the overall claim amount.

How Long Does the Process Take?

You cannot simply write off a debt the moment it becomes overdue by a few weeks. 🕐 Generally, a debt is only considered “bad” after 6 to 12 months of active, unsuccessful collection efforts. The actual tax deduction is claimed annually when you file your corporate tax return. However, if a corporate client officially goes into receivership or bankruptcy, the debt can often be written off immediately upon receiving the official insolvency documents from the bankruptcy trustee.

Bad Debt vs. Doubtful Account

FeatureBad Debt (Section 20)Doubtful Account
DefinitionA specific debt that is definitively uncollectible.A generalized debt that is likely, but not definitely, going to default.
Tax TreatmentFully deductible from your corporate income.A reserve can be claimed, but it must be added back into income the following year.
Proof RequiredExtensive, documented proof of failed collection efforts.Historical financial data showing a potential risk of non-payment.

Frequently Asked Questions (FAQ)

What happens if the client pays me after I already wrote it off?

If a client unexpectedly pays an invoice after you have officially declared it a bad debt, you must report the recovered amount as standard business income in the tax year you actually receive the money.

Can I write off a loan I made to a personal friend?

No. Personal loans cannot be legally claimed as a business bad debt. To qualify, the debt must have been explicitly incurred for the direct purpose of earning business or property income.

Do I need to sue the client in court to prove the debt is bad?

Not necessarily. The CRA simply requires reasonable efforts. If the legal fees required to sue would heavily exceed the actual value of the debt, you do not have to take them to court to prove it is uncollectible.

Can I adjust my GST/HST remittances at the exact same time?

Yes. If you already remitted the sales tax on an invoice that was never paid, you can make a specific bad debt adjustment on your regular GST/HST return to fully recover that tax money from the government.

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