What is a T5018 and which contractors have to file it?

What counts as a T5018-reporting business

The T5018 rule applies to a business where construction activities make up more than 50% of its total business income, a broad category covering general contracting, renovation, demolition, and most trades work rather than one narrow type of job. A business that does some construction work alongside a larger amount of unrelated revenue generally falls outside this rule, since the test looks at the majority of the business, not just the fact that construction work happens at all.

The requirement applies regardless of how the business is structured. A sole proprietor general contractor, a partnership of tradespeople, and an incorporated construction company all face the same T5018 obligation once the 50% test is met, and the corporate status of a subcontractor being paid does not exempt the payment from being reported.

What has to be reported and the $500 threshold

A T5018 is required for each subcontractor to whom you paid combined construction-related amounts of more than $500 over the reporting period, counting both the goods and the services involved in the job as a single figure rather than splitting materials out separately. This combined treatment is one of the more distinctive features of the T5018, since most other CRA information slips focus on one category of payment at a time.

• The $500 threshold is measured against the total paid to that one subcontractor over the whole reporting period, not per invoice.
• Payments below $500 to a given subcontractor generally do not require a T5018 for that subcontractor.
• Confirm with your bookkeeper how GST/HST should be treated in the reported amount, since the correct handling depends on the specific facts of the arrangement.

The kinds of businesses this catches most often are general contractors, framing and drywall crews, electrical and plumbing subcontractors, excavation and site prep companies, and renovation businesses that regularly bring in specialty trades for parts of a job. A business that occasionally hires a subcontractor for a single small task still needs to track that payment against the $500 threshold, even if construction subcontracting is not the bulk of its day-to-day spending.

Choosing calendar-year or fiscal-year reporting

A construction business can choose to report T5018 information on a calendar-year basis or align it with its own fiscal year, whichever suits its bookkeeping cycle better. Once a method is chosen, it should be applied consistently rather than switched back and forth, since that makes it harder to track which payments have already been captured in a prior filing.

The filing itself, whichever period is chosen, is due six months after the end of that reporting period. A business with a December 31 fiscal year end has until the end of June to file, while a business on a different fiscal year end counts six months from its own year-end date instead.

T5018 vs T4A: do not confuse the two

A T4A generally reports fees paid to a contractor for services, and applies broadly across industries rather than being specific to construction. A T5018 is the construction industry’s own reporting mechanism and specifically covers combined goods-and-services payments to subcontractors on construction jobs. Our answer on what a T4A is and which contractors get one explains that broader rule in more depth.

A construction business generally uses the T5018 for its subcontractors rather than layering a T4A on top for the same payments, since the two forms are meant to serve different reporting purposes rather than duplicate each other. Where a construction business also pays contractors for work unrelated to construction, such as bookkeeping or marketing services, those separate payments may fall under the ordinary T4A rules instead.

It is also worth separating a T5018 subcontractor from a genuine employee working on the same job site, since misclassifying an employee as a subcontractor to avoid payroll withholding is a distinct and more serious problem than picking the wrong information slip. Our answer on how the CRA decides employee versus contractor status covers the factors the CRA actually looks at, and getting that call right comes before the T5018 question rather than after it.

Penalties and how we handle T5018 filing for clients

Late or missing information returns, including the T5018, can carry CRA penalties that scale with the number of slips involved and how late the filing is; confirm the current penalty amounts directly with the CRA, since these figures are adjusted from time to time and we do not want to quote a number that may already be out of date. What is consistent is that the penalty grows with both lateness and slip volume, so a construction business with many subcontractors has more at stake than one with only a handful.

We build T5018 tracking into the bookkeeping process for construction clients throughout the year, rather than trying to reconstruct a full year of subcontractor payments after the fact. That means flagging which vendors are subcontractors versus suppliers of materials only, tracking cumulative payments against the $500 threshold as the year goes, and preparing the filing well ahead of the six-month deadline. Doing this monthly instead of at year-end also makes it far easier to catch a subcontractor who is quietly approaching the threshold partway through the year, before the filing deadline is suddenly close. Our payroll and contractor reporting for construction businesses page covers how this fits alongside the rest of a construction company’s payroll and reporting needs, and our broader bookkeeping services cover the vendor tracking that makes an accurate T5018 filing possible in the first place.