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Find a Lawyer » Canada Legal Guides » Money, Taxes & IP Canada » Form T5018: Mandatory CRA Reporting for Canadian Construction Subcontractors

Form T5018: Mandatory CRA Reporting for Canadian Construction Subcontractors

3 Jul 2026 5 min read No comments Money, Taxes & IP Canada
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To comply with Canada Revenue Agency (CRA) rules, construction businesses must file a T5018 Statement of Contract Payments for any subcontractor paid $500 CAD or more for construction services during the reporting period. Failure to file these slips can result in severe financial penalties up to $7,500 CAD per year, with additional severe penalties for intentional non-compliance.

The construction industry is a massive driver of the Canadian economy, but it is also an area where the underground economy frequently operates. 🫯 To combat unreported income and cash transactions, the Canada Revenue Agency (CRA) enforces the Contract Payment Reporting System (CPRS). Under this system, if your primary business is construction, you have a strict legal obligation to track and report the money you pay to other businesses or independent workers who perform construction activities for you.

Filing a T5018 form does not mean you are paying the subcontractor’s taxes, nor does it make them your employee. It is simply an information return that allows the CRA to cross-reference your expenses with the subcontractor’s declared income. If you deduct subcontractor expenses on your corporate or personal tax return but fail to issue the corresponding T5018 slips, you open yourself up to aggressive CRA audits and denied business deductions. Generally, navigating these reporting requirements demands meticulous bookkeeping.

Step-by-Step Process in Canada

Whether your construction firm is based in Toronto, Calgary, Vancouver, or Halifax, this is a federal tax requirement that applies uniformly across the country. Keeping detailed records throughout the year is the most effective way to ensure smooth filing. Many general contractors choose to work closely with an accountant or a Canadian tax firm to manage this administrative burden.

Step 1: Determine if You are a Construction Business

Not every business that hires a plumber or an electrician has to file a T5018. The rule specifically applies to individuals, partnerships, or corporations that derive more than 50% of their total business income from construction activities. This includes erecting, excavating, installing, altering, or demolishing buildings, roads, or other structures. If you are a dentist who hires a contractor to renovate your clinic, you do not need to file this form.

Step 2: Track Subcontractor Payments

Throughout your fiscal or calendar year, you must meticulously track every dollar paid to subcontractors. 📒 You only need to issue a T5018 if the total amount paid to a specific subcontractor for construction services (including the GST/HST/QST charged) is $500 CAD or more during the reporting period. Note that this applies to services; if you purely buy materials from a supplier without any installation labour, a T5018 is not required.

Step 3: Gather Subcontractor Information

You cannot file a T5018 without proper identification. Before you issue the very first cheque to a new subcontractor, you should demand their legal business name, business address, and their 9-digit CRA Business Number (BN). If they are an individual operating as a sole proprietor without a BN, you must collect their Social Insurance Number (SIN). Never pay a subcontractor until they provide this crucial tax information.

Step 4: Choose Your Reporting Period

The CRA offers flexibility in how you define your reporting year. You can choose to report based on the standard calendar year (ending December 31) or based on your company’s specific fiscal year-end. Once you choose a reporting period format, you generally must stick with it for all future T5018 filings unless you get written permission from the CRA to change it.

Step 5: Submit the T5018 Summary and Slips

You must fill out a T5018 slip for each qualifying subcontractor and compile them all under a single T5018 Summary form. If you have 6 or more slips, the CRA legally requires you to file the return electronically via the CRA My Business Account portal or using certified tax software. If you have 5 or fewer slips, you are permitted to mail the physical paper forms to the CRA’s tax centre.

How Much Does it Cost in Canada?

Filing the T5018 itself is free if you do it directly through the CRA, but the administrative and accounting labour involved can cost money. 💰 Furthermore, the penalties for failing to file are steep. The CRA late filing penalty ranges from $100 (for 1 to 5 slips) to $7,500 (for over 10,000 slips). Additionally, under subsection 163(2) of the Income Tax Act, intentional concealment or tax evasion can trigger penalties of up to 200% of the tax evaded, along with potential criminal prosecution. Below is a breakdown of estimated costs in CAD:

CRA Filing Fee$0 CAD
Bookkeeping / Accounting Software$25 – $75 CAD per month
CPA / Accountant Preparation Fee$200 – $600+ CAD annually
CRA Late Filing Penalty$100 to $7,500 CAD (based on number of slips)

How Long Does the Process Take?

The most important timeline is your filing deadline. You must file the T5018 Summary and all associated slips with the CRA within exactly six months following the end of the reporting period you selected. For example, if you chose the calendar year (ending December 31), your strict filing deadline is June 30 of the following year. Preparing the forms electronically through modern accounting software usually takes just a few hours, provided your books are perfectly organized.

Frequently Asked Questions (FAQ)

Do I have to give a copy of the T5018 to the subcontractor?

No, it is not legally mandatory to provide a copy of the T5018 slip to the subcontractor, unlike a T4 slip for an employee. However, the CRA strongly encourages you to share a copy with them so they can accurately verify their own income records when they file their business taxes.

What if I pay a subcontractor in cash?

Paying in cash does not exempt you from the law. Whether you pay by cash, cheque, e-transfer, or barter, you must report the fair market value of any payment over $500 CAD. Failing to report cash payments is considered participating in the underground economy and can trigger massive CRA audits.

Does a T5018 apply if I mix goods and services?

Yes. If a subcontractor provides both materials and installation labour (for example, supplying drywall and installing it), you must report the total gross amount paid, including the cost of the goods and all applicable taxes, on the T5018 slip. You do not need to separate the labour from the materials on the form.

What if I hire a foreign subcontractor?

If you hire a non-resident of Canada to perform construction services inside Canada, you do not use the T5018 form. Instead, you generally must use a T4A-NR form and you may be legally required to withhold 15% of their pay (under Regulation 105) to remit directly to the CRA.

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