Tax Guide for Construction Trades (Canada 2025)
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Guidance, not advice. We explain the rules, we don't assess your situation. Always seek financial or tax advice from your accountant, or contact CRA. Read our editorial scope →
Provincial licensing & certification
| Jurisdiction | Requirement |
|---|---|
| Ontario | Ontario Skilled Trades Authority (OSTA, formerly OCOT) for the 23 compulsory trades; municipal contractor licence varies (Toronto, Mississauga etc.) |
| British Columbia | SkilledTradesBC certification compulsory for 10 trades as of 1 Dec 2023; provincial business licence + WorkSafeBC registration |
| Alberta | Alberta Apprenticeship & Industry Training (AIT) trade certificate; prepaid contractor licence under the Consumer Protection Act if work > $1,200 |
| Québec | Régie du bâtiment du Québec (RBQ) licence MANDATORY for any construction work; CCQ competency card; QST registration |
| Other provinces | Provincial apprenticeship boards (Red Seal harmonised) + municipal trade licences |
Trade-specific deductible expenses
- Heavy equipment — Class 8 (20% DB) for compressors, generators, scaffolding
- Small tools < $500 — Class 12 (100%, no half-year rule)
- Work boots, hard hats, hi-vis, harnesses — fully deductible safety gear
- Subcontractor labour — deductible; T4A required if > $500 to an individual, T5018 mandatory if construction is your primary business (6-month filing window)
- Materials — fully deductible as COGS in year purchased (or carried as inventory if material at year-end)
- Apprenticeship Job Creation Tax Credit — 10% of wages paid to first-2-year Red Seal apprentices, max $2,000/apprentice/year (ITA s. 127(9))
- Trade school + ticket renewal fees — deductible
- Dump & landfill fees, permits, site security — all deductible per job
Vehicle expenses
Work trucks with permanent racks or bed-mounted boxes typically qualify as Class 10 (30% DB). If GVWR exceeds 3,629 kg or seating is limited to 1–3, the $30k cost cap doesn't apply. Logbook required. Travel between home and a regular job site is personal; travel between job sites is business. Site-to-site stops should be logged with addresses.
GST/HST
Construction services are taxable supplies. Register once your trailing 4 quarters cross $30,000. New housing rebate (GST/HST New Housing Rebate, ETA s. 254) often applies to builds you complete for owner-occupants — knowing this helps you price quotes correctly and answer client questions, even though the rebate is claimed by the homeowner. Renovation work on residential resale homes is fully taxable with no rebate.
WSIB / WCB coverage
Mandatory in every province for construction.
- Ontario: WSIB mandatory for construction since 1 Jan 2013, including independent operators with no employees
- British Columbia: WorkSafeBC registration mandatory; personal optional protection (POP) for owners
- Québec: CNESST coverage mandatory; sole proprietors can buy personal protection
- Alberta, Saskatchewan, Manitoba: WCB mandatory for construction trades with employees; optional personal coverage for owners
CRA audit focus for this trade
What gets flagged
- Cash deposits without matching invoices
- Subcontractors who look like employees (one client, set hours, no own tools) — re-classification leads to back CPP/EI + 10%/20% penalties
- Missing or sloppy T5018 information returns
- Big home-office claims when 90% of work is on-site
- Capital expenses expensed as repairs (e.g. a new roof on your own shop expensed in full)
- GST/HST collected but not remitted
Worked example
Ontario general contractor — $120,000 gross
Gross revenue $120,000 Materials (COGS) ($35,000) Subcontractor labour (T5018 issued) ($20,000) Work truck (60% business of $7,500) ($4,500) Tools, PPE, permits, WSIB ($6,500) Phone, software, accounting ($2,800) Home office (15% of $14k) ($2,100) ──────── Net self-employment income ≈ $49,100 CPP (12.0% on $45,400 above $3,500) ≈ $5,450 Federal tax (after BPA) ≈ $5,800 Ontario tax + OHP ≈ $2,700 ──────── Take-home ≈ $35,150 GST/HST collected on $120k @ 13% $15,600 (separate remittance)
Related calculators & references
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