Tax Guide for Self-Employed HVAC Technicians (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 | TSSA Gas Technician G3 (limited), G2 (mid), G1 (full); plus Refrigeration & Air Conditioning Mechanic (313A) via OSTA; ODP certificate for refrigerants |
| British Columbia | Technical Safety BC Gas Fitter Class A/B; SkilledTradesBC RAC mechanic; ODP |
| Alberta | AIT RAC Mechanic; gas fitter Class A or B; municipal mechanical permits |
| Québec | RBQ subcategory 15.9 (refrigeration) + 15.10 (heating); Emploi-Québec card |
| Federal | Environment & Climate Change Canada ODP rules apply nation-wide for refrigerant purchase |
Trade-specific deductible expenses
- Refrigerant recovery units — Class 8 (20% DB)
- Combustion analyzers, manometers, leak detectors — Class 8 (or Class 12 if < $500)
- Vacuum pumps, manifold gauge sets, brazing torches — Class 8 / Class 12
- ODP card, TSSA renewal, manufacturer training — fully deductible
- Refrigerant inventory — COGS; track purchases against ODP card
- Continuing education — heat-pump certification, geothermal training — deductible
Vehicle expenses
Service vans need ventilation for refrigerant transport — typically Class 10. Same rules as other trades: logbook, business-use % of fuel/insurance/repairs.
GST/HST
HVAC services are taxable. Heating season (Oct–Mar) and cooling season (May–Aug) create lumpy cashflow — register for GST/HST annually (default for < $1.5M sales) and set aside collected tax monthly even though you only remit once a year. Instalments kick in if your annual GST/HST owing exceeds $3,000.
WSIB / WCB coverage
Mandatory for construction-classified HVAC work in Ontario (WSIB), BC (WorkSafeBC), Québec (CNESST). For service-only commercial maintenance, classification may differ — check with your provincial board.
CRA audit focus for this trade
What gets flagged
- Refrigerant purchases that don't match billed jobs (ECCC data sharing)
- Big swings in gross revenue between seasons without consistent expense pattern
- Personal HVAC install at home not added back to income
- Treating ride-along helpers as subcontractors
- GST/HST collected but instalments not paid
Worked example
Alberta HVAC technician — $110,000 gross
Gross revenue $110,000
Equipment supplied (furnaces, AC) ($42,000)
Refrigerant, brazing supplies ($3,500)
Van (70% biz of $6,500) ($4,550)
TSSA + ODP renewals, training ($1,800)
Test gear, PPE, hand tools ($3,200)
Phone, billing software, accounting ($2,500)
Home office ($1,800)
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Net self-employment income ≈ $50,650
CPP ≈ $5,660
Federal + Alberta tax ≈ $7,800
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Take-home ≈ $37,190
GST collected on $110k @ 5% $5,500 (Alberta = no PST)
Related calculators & references
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