When to Hire an Accountant vs DIY Taxes in Canada (and What to Bring)

Tax software handles a T4, RRSP deductions and the standard credits as accurately as a professional, so for many people the question isn’t whether they can file themselves but whether they’d leave money on the table by doing so. A professional’s fee tends to pay off once self-employment, rental income, a corporation, an estate or a CRA review is involved. This page covers how to decide, what professional help costs, how to choose someone, and how to prepare for a first appointment. The filing steps themselves are in the guide to filing a tax return in Canada.

DIY or accountant: decision guide

Tax situation	DIY (software)	Professional
One T4, basic return	Usually enough	Rarely needed
T4 income + RRSP + basic credits	Usually enough	Not needed unless complex
Student with tuition credits	Usually enough	Rarely needed
Self-employed (sole proprietor)	Possible but risky	Often recommended
Rental property income	Possible with good records	Often recommended
Incorporated business (T2 return)	Not recommended	Generally required
Foreign income or assets (T1135)	Challenging	Often recommended
CRA audit or reassessment	Not recommended	Strongly recommended
Major life event (divorce, inheritance, death of a spouse)	Risky	Often recommended
Multiple provincial returns	Possible but complex	Often recommended

When DIY software is enough

Situation	Example	Reason
Single source of employment income	One T4	Software handles this well
Basic RRSP/TFSA contributions	Standard contributions	Auto-fills from CRA My Account
Charitable donations	Standard donation receipts	Software works out the claim
Medical expenses	Receipts for eligible expenses	Software applies the threshold
Student with tuition	T2202 slip	Auto-populated
Child care expenses	Receipts for daycare or camp	Software applies the limits
Simple investment income	T5 slips from a bank or brokerage	Auto-imported

Software choices and prices are compared in the best tax software in Canada guide. People with modest income and a simple return can also get a return done free at a volunteer clinic; the best free tax software page covers the Community Volunteer Income Tax Program alongside the free software.

When a professional pays for itself

Trigger	Why
First year self-employed	Setup, GST/HST registration, expense tracking and tax instalments
Rental property income	Capital cost allowance, expense claims, capital gains
Incorporating a business	Corporate tax planning, salary vs dividends, year-end
A major capital gain	Principal residence designation, capital gains reserve
Receiving an inheritance	Estate and tax implications
Moving to or from Canada	Departure tax, worldwide income reporting
CRA review or audit	Representation and responses
Divorce or separation	Asset division, support payment tax treatment
Year of death filing	The returns for a deceased person and the estate’s T3

Types of tax help and what they cost

Type	Typical cost	What they do
DIY software	Free to about $30 for most returns	Guided forms; you enter everything
Seasonal preparer (e.g., H&R Block, Liberty Tax)	$75 to $200	Prepares straightforward returns; quality varies by preparer
Independent CPA or small firm	$150 to $800+	Personal and business tax, planning advice
Large CPA firm	$500 to $2,000+	Complex returns, corporations
Tax lawyer	$300 to $500 an hour	CRA disputes, Tax Court, complex planning
Volunteer tax clinic	Free	Simple returns, modest income

Choosing a tax professional

Credential or factor	Why it matters
CPA (Chartered Professional Accountant)	Verified education and professional standards; suited to complex situations
Tax preparer (non-CPA)	Adequate for simple returns; lower fees
Experience with your situation	Self-employment, real estate and cross-border work are specialties
Clear fee estimate up front	Avoids surprises
Errors and omissions insurance	Protects you if they make a mistake
CRA representation	Whether they stand behind their work in an audit
Electronic filing	Faster processing and refunds

Questions to ask before hiring

Are you a CPA?
Have you worked with clients in my situation (self-employed, rental, cross-border)?
What is your fee, and how is it calculated?
Will you explain the deductions and strategies you use?
Can you represent me if I’m audited?

Red flags

Red flag	What it suggests
Guarantees a large refund before seeing documents	Aggressive or fraudulent tactics
Charges a percentage of your refund	An incentive to inflate deductions
Won’t explain the deductions claimed	May not understand your return
Won’t give you a signed copy of the return	Not following CRA standards
No engagement letter or fee estimate	Unprofessional practice

What to bring to your first appointment

Income slips: every T4, T4A, T4E, T5, T3, T5008 and T2202 for the year (the tax slips hub explains each).

Deduction records:

Document	What it supports
RRSP contribution receipts	RRSP deduction
Donation receipts	Charitable donation credit
Medical expense receipts	Medical expense tax credit
Home office records	Work-from-home expenses
Vehicle log	Vehicle expenses
Business receipts	Self-employment expenses
Moving expense receipts	A move for work or school

Supporting documents:

Document	Why
Last year’s Notice of Assessment	Shows prior-year income and carry-forwards (see how to read your Notice of Assessment)
A copy of last year’s return	Shows the accountant your situation
Government ID	Identity
CRA My Account access	The accountant may review it with you, or you can authorize them as a representative

Accountants usually bill by time, so documents sorted by category keep the bill down.

What happens at the appointment

Phase	What happens
Document review	The accountant reviews your slips and prior return
Questions	Life changes, income sources, deductions
Opportunities	Deductions or credits you missed
Preparation	They enter everything and check the calculations
Review with you	The refund or balance owing, line by line
Filing	You authorize them to file electronically

A basic appointment usually takes 30 to 90 minutes; complex returns may need a longer meeting or a follow-up.

After the appointment

Pay any balance owing by the balance-due date (the tax deadlines page has the dates).
Follow any instalment schedule the accountant sets up.
Keep a copy of the return and your records for six years, in case of a CRA review.
Set up a system for next year’s receipts.

Ongoing vs annual help

Relationship	Suits	Frequency
Annual tax preparation only	Simple self-employment, rental owners	Once a year
Quarterly check-ins	A growing business	4 times a year
Monthly bookkeeping	An incorporated business, complex operations	Monthly
Full service	Larger businesses, several entities	Ongoing

Bottom line

If your taxes fit on a single T4 plus a few slips, software usually does the job, and paying a CPA buys peace of mind more than savings. Once self-employment, rental income, a corporation or a CRA notice is involved, the trade-off reverses: a good accountant often saves more than the fee, and their representation in an audit has its own value. Filing yourself also means checking your own work; the common tax mistakes page lists what to look for.