Bookkeeping for plumbers and HVAC contractors
Job-costed books for a plumbing or heating contractor — CMMTQ-licensed, with holdbacks, GST/QST and T5018 handled.
The licensing difference
In Québec, the contractor’s licence for plumbing and heating work is issued by the Corporation des maîtres mécaniciens en tuyauterie du Québec (CMMTQ), acting as mandatary for the RBQ on the professional qualification of plumbing and heating contractors. If you do plumbing, heating or related mechanical work, that’s where your licence comes from — and keeping your CMMTQ and RBQ details consistent across invoices, bids and filings matters.
What we handle for plumbing and HVAC contractors
- Job costing — so service calls and installs each show real margin.
- Holdbacks — receivable and payable, with GST/QST remitted on release.
- T5018 and subcontractor files — see the construction bookkeeping guide.
- Construction payroll — RL-1/T4, CNESST and the CCQ layer for R-20 work.
- GST/QST, parts/inventory handling, and year-end coordination.
Plans start at $350/month, payroll from $75/month. See contractor bookkeeping or book a free call.
FAQ
Who issues the plumbing contractor licence in Québec?
The CMMTQ (Corporation des maîtres mécaniciens en tuyauterie du Québec) issues the licence for plumbing and heating work as the RBQ’s mandatary for that sector.
Can you handle parts inventory and service calls?
Yes. We job-cost installs and service work and can track parts so your margins on both are clear, alongside holdbacks, T5018 and payroll.