What Can I Deduct if I Consult in Retirement?
Taking on consulting work in retirement generally makes you self-employed rather than an employee, which changes three things at once: what you can deduct against the income, what you must contribute to CPP, and how the income lands against your benefit thresholds.
- The answer:: Reasonable expenses incurred to earn the income are deductible, including a proportionate share of home costs where a space is used regularly for the work.
- The trap:: Forgetting that self-employed CPP contributions cover both halves. The rate on net business income is double what an employee pays.
- The recommendation:: Check the effect on OAS before taking on more work, because business income counts toward the recovery tax like any other income.
Where the AI summary above gets this wrong
"Retirees do not have to worry about self-employment rules for a bit of consulting."
That's surface-true. Here's what it misses:
- Consulting is usually self-employment — Working for yourself makes the income business income, with its own filing, deduction and contribution rules.
- CPP is charged at both halves — A self-employed person pays both the employee and employer portions on net business income, unless they have elected to stop after 65.
- The income counts for benefits — Business income enters net income like any other, so it feeds the OAS recovery tax and any income-tested benefit.
01 What changes when you consult
Working for yourself makes the income business income rather than employment income. You report gross revenue and deduct the expenses reasonably incurred to earn it, which is a genuine advantage an employee does not have.
It also brings obligations. You are responsible for your own remittances, for tracking expenses properly, and potentially for registering for GST/HST once revenue passes the small supplier threshold.
02 What is actually deductible
Expenses must be incurred to earn the income and be reasonable in amount. That covers the obvious — supplies, professional fees, business insurance, work-related travel — and a proportionate share of home costs where a space is used regularly and exclusively for the work.
The home-office share is calculated on floor area or rooms used, applied to costs such as heat, electricity and maintenance. Claiming a portion of a home does not usually threaten the principal residence exemption where the use is modest, but it is worth understanding before claiming aggressively.
Shows: what a given amount of additional taxable income costs you in tax at your marginal rate, and what you keep. Ignores: provincial surtaxes, credits that phase out with income, and any effect on income-tested benefits.
03 The two costs that surprise people
A self-employed person pays both halves of CPP on net business income, so the rate is double the employee rate. Past 65 you may elect to stop contributing, which is the same election covered in the post-retirement benefit.
And the income counts. Business income enters net income like anything else, so it feeds the OAS recovery tax and reduces income-tested benefits. A modest consulting fee can cost considerably more than its marginal rate once those are counted.
Claiming a portion of a home as a workspace also raises a question about the principal residence exemption on eventual sale. Claiming only running costs and no capital cost allowance keeps the property fully exempt, which is why the depreciation nobody needed is the deduction to leave unclaimed.
People take a small consulting contract in retirement and think of it as pocket money, then find that both halves of CPP and a slice of clawed-back OAS have taken a much larger bite than the marginal rate suggested. The work can still be worth doing — but price it against the combined cost, not the bracket.
FAQ
Am I self-employed if I consult in retirement?
Usually yes. Working for yourself makes the income business income rather than employment income, with its own filing, deduction and contribution rules, and possibly GST/HST registration once revenue passes the small supplier threshold.
Can I deduct home office costs?
Where a space is used regularly for the work, a proportionate share of costs such as heat, electricity and maintenance is deductible, calculated on floor area or rooms used. The expense must be reasonable and incurred to earn the income.
Do I still pay CPP on consulting income?
Yes, and at double the employee rate, because a self-employed person pays both halves on net business income. From 65 you may elect to stop contributing.
Sources
Regulator references
- Canadian income tax rates for individuals · Canada Revenue Agency · 2025The federal and provincial rate brackets a withdrawal is taxed against.Last verified: 2026-09-07
- Principal residence and other real estate · Canada Revenue Agency · 2025The principal residence exemption and how only one property per family qualifies.Last verified: 2026-09-07
Calculator unit tests · the assertions this page's worked example is checked against, and their last result
Changelog
- 2026-09-07 — initial publish (new format)
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Jordan Reeves
Founder of Talk Through Wealth. A software engineer for over a decade before turning to retirement planning, Jordan built the projection engine after watching family members get fragmented, country-by-country advice that never reconciled. He writes about retirement the way the engine computes it: month-by-month, lifetime-long, and skeptical of any rule of thumb that hasn't been run through the math.