Contractor accountant in Montreal
Quebec regulates construction in ways no other province does. A Montreal contractor works under an RBQ licence, follows CCQ rules on regulated work, and bills in stages with holdbacks that change when the sales tax is actually owed.
EverStone is a CPA for incorporated contractors and a Montreal small-business accountant, working remotely and in English.
Quick answer: Montreal contractors hold an RBQ licence, follow CCQ rules for regulated construction work, and file T5018 slips for subcontractor payments within six months of the reporting period. They charge 5% GST and 9.975% QST on progress billings. The tax on holdbacks is generally payable when the holdback is paid or falls due. EverStone prepares the books, the sales tax returns and the T2 and CO-17 remotely, in English. Published fees start at $300 a month for bookkeeping and $100 for a personal return.
Contractors in the Quebec City region will find the same work on contractor accounting in Quebec City; payroll for a crew is covered on payroll in Montreal.
The RBQ licence and CCQ-regulated work
A contractor in Quebec needs a licence from the Régie du bâtiment du Québec to carry out construction work, and general contractors check a subcontractor’s licence before they hire. Keeping the corporation’s information current with the RBQ is part of staying able to bid, so a change of shareholders, address or structure is something the accountant should hear about before it happens, not after.
Much of the work on the island and across Laval and the South Shore is also regulated by the Commission de la construction du Québec. CCQ rules govern the labour side of that work: who can do it, and how their hours and pay are reported. For the books, it means payroll on regulated jobs follows CCQ requirements on top of the ordinary QPP, QPIP and source deductions, and job costing has to separate regulated from non-regulated work where a company does both. Mixing them in one wage account is the usual reason labour cost per job cannot be trusted.
Progress billing and when GST and QST become payable
Construction contracts are billed in stages, and the sales tax follows the billing rather than the completion of the job. On an ordinary progress invoice, GST and QST generally become payable on the earlier of the invoice date and the date the payment is received. That means tax on a large draw is owed in the filing period it was billed, even if the client pays late. A Montreal contractor on a monthly or quarterly return can owe tax on money it has not yet collected.
Holdbacks are the exception. The portion of a progress payment that the client holds back under the contract generally does not carry tax until it is paid or falls due for payment, which is often months after the invoice. Invoices that show the holdback separately, and books that track it separately, are what allow the tax on it to be reported in the right period. Holdback accounting works through an example.
Holdbacks on both sides of the ledger
A holdback is earned revenue that is not yet collectible, and it belongs in receivables from the period the work was done. The mirror image sits on the payable side: holdbacks the company retains from its own subcontractors are costs already incurred. Both belong in the period the work happened. Deferring either to the release date misstates the margin on the job that produced it, and on a multi-year project it moves profit between tax years for no good reason. A holdback schedule by project, reviewed at year-end, is what keeps the job-level numbers honest.
T5018 slips and the subcontractor question
A business whose main activity is construction reports payments to subcontractors for construction services on T5018 slips, due six months after the end of the reporting period. The T5018 guide sets out who is included. Gathering names, addresses and business numbers when a sub is first hired is far easier than chasing them a year later.
Behind the slip sits the harder question: is this person a subcontractor or an employee? Control over the work, ownership of tools, the ability to subcontract and the chance of profit or loss decide it, and the consequences of a wrong answer — unremitted QPP, QPIP, EI and income tax — land on the payer. Documenting the position for regular subs is cheap insurance. The T5018 tracker helps keep the details through the year.
What EverStone handles for you
One CPA, one fixed fee agreed up front:
- T2 and CO-17 corporate returns and year-end financial statements
- Progress billing, holdbacks and work in progress reviewed at the cut-off
- GST and QST on progress draws and holdback releases, filed with Revenu Québec
- T5018 subcontractor information returns
- Subcontractor-versus-employee positions documented defensibly
- Job costing that separates CCQ-regulated labour
- Equipment and vehicle CCA schedules
Fixed fees, fully online
EverStone is an Abbotsford CPA firm and Montreal is three hours ahead, so a question sent at the end of your day on site is usually answered before the next one starts. Everything runs by video, phone and secure upload link, which fits a business run from a truck. A typical trades-corporation bundle of bookkeeping, payroll and the year-end usually runs $450 to $650 a month. The fee is fixed and agreed before work starts. See what it costs.
Prepared and reviewed by a Chartered Professional Accountant at EverStone CPA, an Abbotsford CPA firm working with small businesses and incorporated contractors across the Fraser Valley and Canada. Updated September 2026. About the firm
What an incorporated contractor has to get right
| Item | Why it matters |
|---|---|
| RBQ licence | Required to carry out construction work in Quebec; keep the company’s details current |
| CCQ-regulated work | Labour on regulated jobs follows CCQ rules on top of ordinary payroll |
| Progress billing and holdbacks | Tax on a draw is generally due when billed; tax on a holdback when it is paid or falls due |
| Subcontractor payments | Reported on T5018 slips within six months of the reporting period |
| Sales tax where you operate | 5% GST and 9.975% QST, both administered by Revenu Québec |
Source: Construction and trades accounting. General information, not advice.
Montreal accounting for construction contractors FAQ
When do I owe GST and QST on a progress invoice?+
Does my accountant need to know about my RBQ licence?+
How does CCQ-regulated work affect my books?+
When are T5018 slips due?+
How are holdbacks recorded?+
Can a CPA in British Columbia handle a Montreal contractor?+
What does an accountant cost for a Montreal construction business?+
Do you work with businesses outside Montreal itself?+
Related services and local guides
Nearby cities, the rest of what we do for Montreal businesses, and the reference pages behind this one.
Contracting in Montreal?
One CPA for your corporate taxes, books and sales tax on progress billings. Fixed fee, fully online, in English. Book a free consult.
Remote contractor accounting from Abbotsford
Contractor accounting for Montreal clients is delivered remotely from 32615 South Fraser Way in Abbotsford. There is no Montreal office and no local team. Meetings are virtual, documents are signed electronically, and you deal with the CPA directly rather than an intake desk. EverStone works in English. Subcontractor payments, holdbacks and equipment costs are tracked as they happen rather than reconstructed at year end.
Talk to a CPA about this
One Chartered Professional Accountant, start to finish. Fixed fees, quoted in writing before any work begins, and no obligation from a first conversation.