T5018 Construction Return · Canada · Licensed CPA

T5018 Construction Information Return: Who Must File, Deadlines and Penalties

What the T5018 is, which construction businesses must file it, how to report payments to subcontractors, the reporting period and deadline you can choose, how it differs from a T4A, and the penalties for filing late or not at all. Written by a licensed Canadian CPA who works with contractors, builders and trades across Ontario and Canada.

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A business whose primary activity is construction must file a T5018 Construction Information Return to report the total amount it paid to subcontractors for construction services during the reporting period. You file it if construction is your main source of business income and you paid subcontractors more than $500 in the period. The return is due six months after the end of the reporting period you choose, and filing it late or not at all carries CRA penalties. It reports payments only; it does not withhold or remit tax.

What the T5018 Is

The T5018 is an information return, not a tax return. It tells the CRA how much your construction business paid to each subcontractor for construction services during the year. The CRA uses it to match those payments against what the subcontractors report as income, which is why the construction sector has its own dedicated return that other industries do not.

If construction is the primary source of your business income and you use subcontractors, this filing applies to you. Getting it right is part of how we handle full-service accounting and tax for construction businesses.

Who Must File a T5018

The test is based on your primary business activity and the payments you make. You must file if construction is your main source of business income and you made payments to subcontractors for construction services. The obligation sits with the payer, meaning the contractor or builder paying the subcontractor, not the subcontractor receiving the money.

Situation	T5018 Filing
Construction is your primary business, you pay subcontractors	Must file
Payments to a subcontractor of $500 or less in the period	Not required to report that subcontractor
Payments purely for goods or materials, not services	Generally not reportable
Construction is only a minor part of your business	Generally not required
Payments to employees	Reported on a T4, not a T5018

The Reporting Period and Deadline

You choose your reporting period, and it can be your calendar year or your fiscal period. Once chosen, the return is due six months after the end of that period. Picking the period that lines up with your fiscal year usually keeps the filing simple, because it matches the rest of your bookkeeping and corporate filing cycle.

The deadline is six months after your period end: If you report on a calendar-year basis ending December 31, the T5018 is due by June 30. If you report on a fiscal period, count six months from your period end. Choosing the wrong period is a common reason contractors file late without realising it.

What Gets Reported

You report the total of construction-service payments made to each subcontractor over the reporting period, including any GST/HST paid. Payments for services are reportable; payments purely for goods or materials generally are not. Where an invoice mixes both, the service portion is what matters, which is why clean records that separate labour from materials make this filing far easier.

Identify your subcontractors. List every subcontractor you paid for construction services during the reporting period, with their name and identifying number.
Total the service payments. Add up what you paid each one for services over the period, including GST/HST, and exclude pure goods or materials.
Apply the $500 threshold. A subcontractor you paid $500 or less in the period does not need to be reported.
File within six months. Submit the return within six months of your chosen period end to stay onside.

T5018 Versus T4A

Contractors often confuse the T5018 with the T4A, and the difference matters. The T5018 is specific to the construction sector and reports payments to subcontractors for construction services. The T4A is a broader slip used across industries for various payments. A construction business paying subcontractors uses the T5018 for those payments, not the T4A.

Feature	T5018	T4A
Who uses it	Construction businesses	Payers across many industries
What it reports	Subcontractor construction-service payments	Various non-employment payments
Reporting period	Calendar or fiscal, your choice	Calendar year
Withholds tax	No	No, in most cases

Penalties for Filing Late

The T5018 carries CRA penalties for late filing, and they scale with the number of slips and how late the return is. Not filing at all, or filing well past the deadline, is the expensive mistake, because the penalty applies per return and can grow quickly for a contractor with many subcontractors. The fix is simple: know your period, track your subcontractor payments through the year, and file on time.

Where contractors get the T5018 wrong: Not filing at all because they did not know the return existed, confusing it with a T4A, reporting pure materials that should have been excluded, missing the six-month deadline because they chose the wrong period, and having no clean split between labour and materials so the numbers cannot be built accurately.

Case Study: Contractor, Subcontractor Cleanup and Filing

A contractor had been paying subcontractors for several years without ever filing a T5018, unaware the return applied to their business. We reconstructed the subcontractor payments across the open periods, separated services from materials, applied the $500 threshold, and brought the outstanding returns onside before it became a larger CRA problem.

Subcontractor payments reconstructed. Returns filed and brought onside.

Case Study: Builder, T4A Corrected to T5018

A construction company had been reporting subcontractor payments on T4A slips instead of the T5018, mixing the two returns. We identified the misreporting, moved the construction-service payments onto the correct T5018, and set the reporting period to match their fiscal year so future filings stayed simple and on time.

Misreporting corrected. Reporting period aligned to fiscal year.

Not Sure If You Must File a T5018?

We confirm whether the return applies, reconstruct your subcontractor payments, set the right reporting period, and file it on time. AFFORDABLE flat fees. All fees include HST.

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Frequently Asked Questions: T5018 Construction Information Return

What is a T5018 Construction Information Return?

It is an information return that reports the total payments a construction business made to subcontractors for construction services during the reporting period. It reports payments only and does not withhold tax.

Who has to file a T5018?

A business whose primary source of income is construction and that paid subcontractors for construction services. The obligation sits with the payer, the contractor or builder, not the subcontractor being paid.

What is the $500 threshold?

A subcontractor you paid $500 or less for construction services in the reporting period does not need to be reported. Once you pass $500 with a subcontractor, their payments are reportable.

When is the T5018 due?

Six months after the end of the reporting period you choose. If you report on a calendar-year basis ending December 31, it is due by June 30. On a fiscal period, count six months from your period end.

Can I choose my reporting period?

Yes. You can use your calendar year or your fiscal period. Choosing the period that matches your fiscal year usually keeps the filing simple because it lines up with the rest of your bookkeeping.

What payments do I report on a T5018?

The total construction-service payments made to each subcontractor over the period, including any GST/HST. Payments purely for goods or materials are generally not reportable; the service portion is what counts.

Do I report GST/HST in the amount?

Yes, the reportable figure includes any GST/HST paid on the construction services. The total you paid the subcontractor for services is what goes on the return.

Do I report payments for materials?

Generally no. Payments purely for goods or materials are not reportable. Where an invoice mixes labour and materials, the service portion is what matters, so clean records help.

What is the difference between a T5018 and a T4A?

The T5018 is specific to construction and reports subcontractor construction-service payments. The T4A is a broader slip used across industries. A construction business paying subcontractors uses the T5018.

Do I file a T5018 for my employees?

No. Payments to employees are reported on a T4, not a T5018. The T5018 is for payments to subcontractors for construction services, not employment income.

Does the T5018 withhold tax?

No. It is an information return that reports payments. It does not withhold or remit tax. The subcontractors report and pay tax on their own income.

What are the penalties for filing late?

The CRA charges late-filing penalties that scale with the number of slips and how late the return is. For a contractor with many subcontractors, the penalty can grow quickly, so filing on time matters.

What if I never filed a T5018 I should have?

We reconstruct the subcontractor payments across the open periods, separate services from materials, and bring the outstanding returns onside before the exposure grows. Correcting it early limits the penalty risk.

I have been using T4A slips instead. Is that a problem?

It can be. Construction-service payments to subcontractors belong on the T5018, not the T4A. We identify the misreporting, move the payments onto the correct return, and set the period going forward.

Do I need my subcontractors' information to file?

Yes. You need each subcontractor's name and identifying number along with the total you paid them for services. Collecting this through the year makes the filing straightforward.

What if a subcontractor will not give their number?

You are still required to report the payments and to make a reasonable effort to obtain the number. We help you document the effort and complete the return correctly where information is missing.

Does the T5018 apply if I only occasionally do construction?

Generally the return applies where construction is your primary source of business income. If construction is only a minor part of what you do, the obligation usually does not apply, but it should be confirmed.

Can you file the T5018 for me?

Yes. We confirm whether it applies, build the subcontractor totals from your records, set the reporting period, and file the return on time as part of your construction bookkeeping and tax work.

How much does T5018 filing cost?

It depends on scope and the number of subcontractors. We quote an exact flat fee before starting, and all fees include HST.

Are your fees inclusive of HST?

Yes. All quoted fees include HST, so the number you are quoted is the number you pay. There is no hourly billing.

How do I pay your fees?

Payment is by Interac e-Transfer to info@gondaliyacpa.ca. Auto-deposit is enabled, so no security question is needed.

Do you work with contractors across Canada?

Yes. We advise contractors, builders and trades on the T5018, bookkeeping, GST/HST and tax across the GTA and all of Canada, remotely and in person, with the same flat-fee pricing.

How do I get started?

Book a free consultation or use our fee calculator. We confirm whether the T5018 applies, build your subcontractor totals, and file on time. Book Free Consultation →

T5018, Subcontractor Reporting and Construction Tax. Done Right.

We confirm whether the T5018 applies, reconstruct your subcontractor payments, set the right reporting period, and file it on time alongside your construction bookkeeping and tax. AFFORDABLE flat fees. All fees include HST.

Book Free Consultation Know Exact Fees within 2 Minutes