Effective July 1, 2026, Ontario’s provincial small business corporate tax rate dropped from 3.2% to 2.2%. The province made the cut to lower the tax burden on small businesses, strengthen economic competitiveness, and encourage business investment, job creation, and growth. Combined with the federal 9% small business rate, the total rate on the first $500,000 of active business income earned by a Canadian-Controlled Private Corporation is now 11.2%, down from 12.2%.
For incorporated Ontario business owners, that is a real dollar saving on retained corporate earnings. It is also a moment worth pausing on. A lower rate does not automatically mean lower tax paid. It changes the math on several decisions that most owners only revisit once a year, if that.
Here are five things every incorporated Ontario business owner should look at now that the rate change is in effect.
1. Review your salary vs. dividend mix for 2026.
With a lower corporate rate, income retained inside the corporation is now marginally cheaper on a tax basis than it was six months ago. That does not mean everyone should shift toward dividends or toward retaining more, but it does mean the math you used to set your 2026 remuneration in January may need refreshing. If your compensation plan was set on a spreadsheet last winter using 12.2%, it is now working with the wrong assumption.
2. Potential for a higher year-end refund.
Corporate tax instalments are tied to your prior year’s taxes owing, based on last year’s tax rate. Therefore, if your actual tax payable for 2026 is lower than the instalments paid throughout the year, your refund will be higher than it would have been under the previous tax rate structure. Reviewing your year-to-date numbers against your current instalments now will help you establish an accurate cash-flow forecast well ahead of tax season.
3. Rethink capital purchase timing.
If you have a piece of eligible depreciable property planned before year-end, the tax outcome depends on when you actually put the asset into use. Capital cost allowance claimed against income taxed at 11.2% is worth slightly less than CCA claimed at 12.2%, but the timing rules and half-year conventions still matter more than the rate. The point is not to rush or delay a purchase because of the rate change, it is to make the timing decision on the merits of your business, not on outdated tax numbers.
4. Update your budget-to-actual projections.
If you do quarterly reviews of your budget-to-actual (and if you do not, this is your reminder), the rate change flows through your tax expense line for the second half of the year. Any forecasts, cash-flow projections, or borrowing conversations that reference your effective tax rate should be refreshed. Banks and lenders will notice if your projections and your actuals do not reconcile.
5. Verify your Small Business Deduction eligibility hasn’t changed.
The rate cut only helps you if your corporation is still eligible for the Small Business Deduction. Passive investment income above $50,000 in the prior year begins to grind down your access to the SBD, and hitting the associated-corporations rules can eliminate it entirely. If your corporate structure has changed in the past year (a new holding company, a new joint venture, a significant investment portfolio inside the corporation), this is a good moment to confirm that your SBD access is intact. The rate cut is only meaningful if you are still standing in the doorway to it.
What this means practically
The Ontario rate cut is not a windfall, but it is a real change to the math behind most owner-manager tax decisions. The businesses that benefit the most from a change like this are the ones that revisit their planning when the assumptions shift, rather than waiting until year-end to find out what happened.
At SHARP & Associates, we help owner-managed Ontario businesses stay ahead of these decisions rather than react to them. If it has been a while since your remuneration strategy was reviewed, or if your corporate structure has evolved and you are not sure whether your SBD access is still clean, this is the right window to look at it.
