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There’s no standard retainer for accounting services in Canada. Firms set their own monthly fees, and we couldn’t find an official range or a source we’d trust for one, so we won’t print a number. A better question is what a monthly fee should cover, and how you’d know it was worth paying.
What a retainer for accounting services actually is
A retainer is a fixed monthly amount for a defined bundle of work. You pay the same if you call the accountant once or ten times. The upside is a predictable bill. The downside is paying for things you never use.
Most bundles draw from the same short menu: bookkeeping, payroll, GST/HST filing, year-end statements, the corporate tax return and a few hours of advice. What differs is which pieces are in, which cost extra and how many hours of questions you get. Two firms can quote the same monthly figure for very different packages.
What should be written into the agreement?
Get it in writing.
Ask for an engagement letter, and read it before you sign. It should name each task and how often it happens. It should say who does the work and who at the firm you can reach. It should also list what triggers an extra charge, such as a late-filed return caused by missing records, or an audit request from the CRA.
Check the notice period too. A 30-day exit gives you a way out if the service slips. A year’s lock-in is a different bet, so weigh it against the price.
A checklist to compare quotes
| Ask about | Why it changes the price |
|---|---|
| Bookkeeping | Included, or you keep the books yourself |
| Payroll | Number of employees and how often you pay them |
| GST/HST returns | How often you file and whether the firm sends them in |
| Year-end and T2 return | Bundled into the monthly fee, or billed once a year |
| Advice hours | A fixed number, or billed by the hour after that |
| CRA correspondence | Covered, or charged separately |
| Exit terms | Notice period and how you get your files back |
A payroll example to test what’s really included
Payroll is a good test because the deadlines are strict. Take one employee paid $4,000 a month in Ontario. The payroll remittance calculator puts the amount you owe the CRA at $1,078.70 each month: $766.78 held back from the employee, plus $311.93 as your share of CPP and EI. That’s before workers’ compensation, which the tool leaves out.
When do you send it? That turns on the type of remitter the CRA assigns you. A regular remitter pays by the 15th of the following month. Quarterly remitters, for small employers, pay on the 15th of April, July, October and January. Late payments carry penalties from 3% to 10% of the amount, plus interest, according to the CRA.
Ask one blunt question. If your accountant handles payroll, who watches that date? If the answer isn’t in writing, the penalty lands on you.
How to judge whether a retainer is worth it
Add up what the same services would cost you a la carte, then compare. Use the budget calculator to see what a monthly fee does to your cash flow, and the corporate tax calculator to get a feel for the tax bill your accountant is working on. If you’re a sole proprietor, the tax installments calculator shows what advance payments could look like.
Some businesses skip retainers entirely. A one-person shop that files once a year may do better paying per job. A company with staff, GST/HST and a growing ledger will probably want the monthly rhythm.
Mistakes that cost more than the fee
The biggest is thinking the accountant now owns your compliance. The CRA says you’re responsible for making sure adequate records are kept, even when a bookkeeper or accountant keeps them for you. Send your receipts on time.
Vague scope is next. If the letter says “general accounting support”, you’ll argue about it later. And finally, never let a firm sit on your files. You should be able to see your books whenever you want.
Where the information comes from
Payroll remitting dates, remitter types and penalty percentages come from the CRA page on when to remit source deductions. The records responsibility comes from the CRA guide on keeping records. The example figures come from our payroll remittance calculator, read September 2026. We didn’t confirm any fee levels.
Frequently asked questions
What is a typical retainer for accounting services in Canada?
There's no standard. Firms set their own fees and we couldn't confirm a reliable range, so get written quotes that list exactly what's included.
What does an accounting retainer usually cover?
It's a fixed monthly fee for a defined bundle such as bookkeeping, payroll, GST/HST filing, year-end work and some advice. The bundle differs by firm.
Who is responsible if the accountant misses a payroll deadline?
The CRA says you're responsible for the records even when an accountant keeps them, and late remittances carry penalties from 3% to 10% plus interest. Put deadline duties in writing.
When are payroll remittances due?
Regular remitters pay by the 15th of the following month. Quarterly remitters pay on the 15th of April, July, October and January.
Do I need a retainer at all?
Not always. A one-person business filing once a year may prefer paying per job, while a business with staff and GST/HST may want a monthly plan.
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Information only. This page is general information, not tax, legal or accounting advice. Tax-Services.ca is an independent publisher: we don't prepare or file tax returns or offer tax services, and we have no connection with the CRA, Revenu Québec, any government or any company named on this page. Check the figures that matter with an official source or a qualified professional.