Tax Guide for Self-Employed Canadian Developers & IT Contractors 2025

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 →

Jurisdiction	Requirement
Federal	No federal licence required for software development. Security-clearance contracts (Government of Canada) require Reliability or Secret clearance via PSPC.
Ontario	No provincial software licence. If providing IT security services, consider CISSP/CISM designations (professional dues deductible).
British Columbia	No provincial licence. ISC2/CompTIA dues deductible if required by contract.
Québec	No provincial licence. Bill 96 French-language requirements apply to consumer-facing software and public communications.
All provinces	Professional liability insurance (E&O / cyber) strongly recommended; premiums fully deductible.

Trade-specific deductible expenses

Cloud computing costs — AWS, Azure, GCP, Vercel, GitHub, GitLab: all current expenses (subscription/hosting)
Computer hardware — CCA Class 50 (55% DB) for laptops, monitors, servers; Class 8 for desks/chairs > $500
Cybersecurity / E&O insurance — fully deductible; increasingly required by enterprise clients
Home office — most developers work primarily from home; claim business-use-of-home proportionally (floor area method)
Training & certifications — AWS/Azure/GCP certs, security certs, conference tickets: deductible if maintaining existing skills
Co-working space — fully deductible if used for business; not a home-office alternative for principal-place-of-work tests
Professional memberships — ACM, IEEE, local dev groups: deductible
Books, courses, subscriptions — O'Reilly, Pluralsight, Udemy: current expense
Open-source contributions — generally not deductible (no business purpose unless directly related to client deliverable)
Foreign client income — zero-rated GST/HST export; claim Foreign Tax Credit if any US withholding applies

High PSB Risk — CRA actively targets IT contractors

If you incorporate and work for one client who controls your schedule, methods, and deliverables, CRA may reclassify your corporation as a PSB. The result: corporate tax at the top personal rate (~53%) with no small-business deduction, and no income splitting. This is the single biggest tax risk for incorporated developers.

Employee vs True Contractor vs PSB — at $120,000 income

Factor	Employee	True Contractor	PSB (Reclassified)
Tax rate on $120k	~28% avg (T4, no expenses)	~18% avg (T2125, deduct expenses)	~53% corporate + personal
Expense deductions	Minimal (home office limited)	Full T2125 deductions	Limited (salary-only deduction)
CPP/EI	Employee share only	Full CPP (both portions); EI optional	Same as corp structure
Client control	High — employer directs work	Low — contractor controls methods/schedule	High — CRA finds control present
Own equipment?	No	Yes — laptop, software, cloud	No (or not enough)
Subcontract?	No	Yes — can hire help	No
Financial risk	None	Own — pay for fixes, deadlines	Minimal

PSB Avoidance Checklist

Multiple clients — aim for at least 2–3 active clients in any 12-month period; no single client > 70% of revenue
Own equipment — use your own laptop, software licences, cloud accounts (not client-provided)
Control methods & schedule — set your own hours, work location, and development approach
Ability to subcontract — contract should permit delegation; actually do it occasionally
Financial risk — fixed-price contracts, not time-and-materials with no risk
Invoice by project milestone, not by hours worked
Written contracts — clearly state independent contractor relationship; avoid employment-like language

GST/HST

Software development services to Canadian clients are standard-rated GST/HST. Foreign clients (US, UK, EU) are generally zero-rated exports — charge 0% but claim ITCs on Canadian expenses. If a US platform withholds tax, claim a Foreign Tax Credit on your T1. Mandatory GST/HST registration at $30k+ revenue; voluntary registration below that to claim ITCs on equipment.

WSIB / WCB coverage

Software development is not construction-classified and WSIB/WCB is not mandatory. Optional coverage is available. If you subcontract to other developers, ensure they have their own coverage or are truly independent (CRA and provincial boards both scrutinize subcontractor classification).

CRA audit focus for this trade

What gets flagged

Single-client concentration — 80%+ revenue from one source is a PSB red flag
Client-provided laptop + VPN access (looks like employment)
Time-tracking and daily stand-ups dictated by client (control factor)
Incorporated contractor with no subcontractors ever used
Claiming open-source conference travel with no client linkage
Home office claimed without being the principal place of business

Worked example

BC freelance developer — $120,000 gross (3 clients: 45% / 35% / 20%)

Gross revenue (3 clients)               $120,000
Cloud computing (AWS, Vercel, GitHub)     ($4,200)
Hardware CCA (Class 50, laptop + monitor) ($2,200)
Home office (25% of $18,000 costs)      ($4,500)
Cybersecurity / E&O insurance             ($2,800)
Training & certifications               ($1,500)
Co-working space (2 days/week)            ($3,600)
Accounting & legal                      ($2,400)
                                         ────────
Net self-employment income               ≈ $98,800

CPP (self-employed)                      ≈ $5,660
Federal + BC tax                         ≈ $19,200
                                         ────────
Take-home                                ≈ $73,940
GST collected on Canadian revenue @ 5%    $3,250   (BC clients only)