How much should I set aside for taxes as a self-employed Canadian?

Why the right percentage depends on your total income

Canada's personal income tax uses graduated brackets, so the rate that applies to your last dollar of self-employment income, your marginal rate, depends on your total income for the year from every source, not just the business. A commonly used approximate range for a self-employed Canadian to set aside for income tax and CPP combined is roughly 25 to 35% of net business income, with the lower end fitting a modest income taxed mostly at lower brackets and the higher end fitting income pushed into higher brackets.

This range is a planning starting point, not a substitute for an actual estimate. An owner with a modest side business taxed at a lower bracket needs to set aside less than an owner running self-employment income as their sole source of income into a higher bracket, even on similar gross revenue, so it is worth having an accountant calculate a number specific to your income level, province, and any other income you have. This calculation also looks different if the business is incorporated rather than operated as a sole proprietorship, since a corporation pays its own corporate tax rate and the owner is only personally taxed on what is actually paid out as salary or dividends; our answer on sole proprietorship versus incorporation walks through that comparison in more detail.

Provincial tax adds another layer on top of federal tax, and since each province sets its own brackets, two self-employed Canadians with identical net income in different provinces can owe noticeably different combined totals. Ontario has its own bracket structure separate from the federal one, so a rate estimate calculated for a business in one province should not be assumed to carry over to another.

An RRSP contribution reduces net income for tax purposes in the year it is made, which is one of the few levers a self-employed person has to lower the percentage actually owed on a given year's income, though it only works if the cash to fund the contribution is actually available. This is worth factoring into the set-aside calculation rather than treating RRSP contributions as a separate decision made after tax planning is already finished.

Legitimate business expenses reduce net income before any of this percentage even gets applied, so keeping thorough records throughout the year, rather than reconstructing them at tax time, directly lowers the actual amount owed. An expense missed because the receipt was never kept is not just a bookkeeping gap; it is tax paid on income that did not need to be taxed in the first place.

CPP takes a bigger bite when you are self-employed

An employee splits Canada Pension Plan contributions with their employer; a self-employed person pays both halves. As at the time of writing, that means a combined rate on the order of 11.9% up to the Year's Maximum Pensionable Earnings (YMPE), plus an additional CPP2 contribution on earnings between the YMPE and a second, higher ceiling. Both the rate and the earnings ceilings are indexed and change most years, so it is worth confirming the current YMPE and rates with the CRA or your accountant rather than assuming last year's figures still apply.

HST you have collected was never your money

If you are registered for GST/HST, the tax you charge and collect from customers is held for the CRA, net of the input tax credits you can claim on your own business purchases, and is not part of your income. Spending collected HST as though it were revenue is one of the most common reasons a self-employed business hits a cash crunch when a GST/HST return comes due; setting it aside the moment it is collected, in a separate account from income tax savings, avoids the problem entirely. Some registrants qualify for the quick method of calculating GST/HST, which can simplify the remittance calculation and change how much is actually owed compared with the standard method, so it is worth confirming whether your business qualifies.

Instalments, the $3,000 rule, and the year-one shock

The CRA requires quarterly tax instalments, generally due March 15, June 15, September 15, and December 15, once your net tax owing exceeds $3,000 in the current year and in either of the two preceding years. Many new self-employed owners are not required to pay instalments in their very first year, since the CRA has no prior-year history to base the requirement on, which can create a false sense of security.

By the second year, the tax owing from year one often comes due at the same time as the first instalment based on that same year-one amount, so two obligations land together right when the business may still be finding its footing. The most reliable way to avoid that collision is a separate savings account that never gets touched for anything else, funded by an automatic transfer of your target percentage every time you get paid, so the money is already set aside before it can be spent.

How we help clients set this up

As part of our tax services, we estimate a client's actual combined rate early in their first year of self-employment, rather than leaving them to guess with a generic percentage, and we flag the year-two instalment collision well before it arrives. We also fold this set-aside percentage directly into the budget we help clients build, rather than treating tax savings as a number tracked separately from everything else in the business. A short conversation in year one is far less expensive than an unplanned tax bill in year two.