Canadian residents earning from US AI training platforms file as self-employed business income via Form T2125. The structure is similar to US but with a few Canadian-specific advantages. Here's the guide.
Basic structure
AI training income is self-employment business income. Reported on Form T2125 (Statement of Business or Professional Activities) attached to your T1 personal return.
Apply direct — no résumé middleman, no signup, no data resold.
You don't need to incorporate. Sole proprietorship is automatic when you earn business income.
Tax rates
Canadian federal + provincial combined marginal rates for 2026:
- Up to ~$55k: ~25–28% combined (varies by province)
- $55k–$110k: ~32–38%
- $110k–$170k: ~38–43%
- $170k+: ~45–53% depending on province
Plus CPP contributions on self-employment income (~10% of net earnings, both employer and employee portions, capped). Plus EI premiums (optional for self-employed).
GST/HST registration threshold
Register when revenue exceeds CAD $30,000 in any rolling 12-month period (lower than most other countries). Once registered:
- Services to non-Canadian clients are zero-rated for GST/HST.
- You can claim Input Tax Credits on Canadian business expenses.
- Quarterly or annual returns required.
The $30k threshold is low — most full-time AI training contractors will cross it. Plan for the registration overhead.
RRSP contributions (the major tax shelter)
Self-employed contractors can contribute up to 18% of earned income (capped at $32,490 for 2026) to an RRSP, deductible against taxable income.
For a senior AI contractor at $130k income: ~$23,400 RRSP contribution, ~$8,400 tax savings at marginal rate. Compounding annually, this is the largest tax-advantaged shelter available.
TFSA contributions
Tax-Free Savings Account contributions ($7,000 in 2026) aren't deductible but grow tax-free and withdrawals are tax-free. Use after RRSP space is exhausted, or if you expect to be in a higher tax bracket later.
Quarterly tax instalments
CRA requires quarterly instalments after your first year as self-employed:
- Mar 15, Jun 15, Sep 15, Dec 15
- Each instalment 25% of expected annual liability
- Missing instalments triggers ~7% interest penalty
Common deductions on T2125
- Home office: Use of home for business — proportional to square footage and time used.
- Capital cost allowance: Equipment depreciation over standard schedule.
- Internet, phone, utilities: Business-use percentage.
- Professional development: Courses and training.
- Health and dental insurance premiums: Eligible for deduction as business expense.
Bottom line
Canadian AI training contractors should: file T2125 with their T1 return, register for GST/HST once over $30k revenue (zero-rated for foreign services), max out RRSP contributions for the largest tax shelter, pay quarterly instalments after year 1, and claim home-office plus equipment deductions. Effective rate at senior contractor income is ~36% combined federal + provincial.