Ontario Cuts the Small Business Tax Rate to 2.2%: What Your Corporation Needs to Know Before July 1, 2026

Quick answer: The 2026 Ontario Budget (tabled March 26, 2026) cuts the province’s small business corporate tax rate from 3.2% to 2.2%, effective July 1, 2026. Because the change lands mid-year, most CCPCs with a calendar fiscal year will pay a blended rate of about 2.7% for the 2026 tax year, dropping to the full 2.2% starting in 2027 — worth up to $5,000 a year in provincial tax savings. The $500,000 small business limit and the federal 9% small business deduction rate are unchanged.

What Is Ontario Actually Changing?

The 2026 Ontario Budget, tabled by Minister of Finance Peter Bethlenfalvy on March 26, 2026, reduces the province’s small business corporate income tax rate — the “lower rate” that applies to the first $500,000 of active business income earned by a Canadian-controlled private corporation (CCPC) — from 3.2% to 2.2%. The change takes effect July 1, 2026.

This is a provincial rate cut only. It stacks on top of the federal small business deduction, which keeps the net federal rate on the same income at 9%. Combined, a CCPC’s blended federal-plus-Ontario rate on its first $500,000 of active business income moves from 12.2% today toward 11.2% once the cut is fully phased in for a full tax year.

When Does the 2.2% Rate Take Effect?

The new 2.2% rate applies to income earned on or after July 1, 2026. Ontario is not making the cut retroactive to January 1, 2026, and it is not deferring it to the start of the 2027 tax year either — it lands mid-calendar-year, which is exactly where most of the confusion is going to come from over the next few filing seasons.

How Much Will My Corporation Actually Save?

For a CCPC earning the full $500,000 small business limit with a fiscal year ending December 31, 2026, the practical effect is a blended provincial rate of roughly 2.7% for the 2026 tax year — half the year at 3.2%, half at 2.2% — before landing at the full 2.2% rate starting with the 2027 tax year. On $500,000 of active business income, that phase-in difference between the old 3.2% rate and the new 2.2% rate works out to up to $5,000 in annual provincial tax savings once the cut is fully in effect, per Ontario’s own budget estimate.

The savings scale down for corporations earning less than the full $500,000 limit, and they do not apply at all to investment income, which continues to be taxed at Ontario’s 11.5% general corporate rate (50.17% combined for investment income within a CCPC, unchanged by this budget).

What If My Corporation’s Fiscal Year Doesn’t End December 31?

This is the detail most generic coverage of this rate cut skips, and it’s where an LPA-reviewed answer earns its keep. When a provincial (or federal) corporate tax rate changes partway through a corporation’s tax year, the Canada Revenue Agency’s standard methodology is to prorate the rate based on the number of days in the tax year each rate is in effect — CRA calls this a dual tax rate calculation, and it applies province-by-province.

Practically, that means:

• A corporation with a December 31, 2026 year-end prorates: roughly 181 days at 3.2% and 184 days at 2.2%, landing near the 2.7% blended figure above.
• A corporation with a June 30, 2026 year-end is taxed almost entirely at the old 3.2% rate for that fiscal year — the cut barely touches it until the following year.
• A corporation with a June 30, 2027 year-end (i.e., its fiscal year starts July 1, 2026) is the first to get a full year at the new 2.2% rate.

If your corporation’s year-end sits close to July 1, the prorating mechanic can meaningfully change how much benefit you see in the transition year — and it’s a genuine planning conversation, not just a bookkeeping footnote, for anyone weighing a fiscal year-end change around this budget.

Does the $500,000 Small Business Limit Change?

No. The small business limit stays at $500,000 federally and in Ontario. This budget changes the rate applied to income within that limit, not the size of the limit itself. Associated-corporation rules also continue to apply unchanged: a group of associated CCPCs still shares a single $500,000 business limit across the group, allocated by agreement on CRA Schedule 23.

What About the Federal Small Business Deduction?

Unaffected. The federal small business deduction continues to reduce the net federal corporate tax rate on eligible active business income to 9% (down from the 38% basic rate, after the federal tax abatement and general tax reduction, then the small business deduction itself). This budget is provincial only — Ontario’s rate is layered on top of, not instead of, the federal 9%.

How Does This Affect Salary vs. Dividend Planning?

Indirectly, but it matters. To keep the overall integration of the corporate and personal tax systems roughly neutral, Ontario is also reducing its non-eligible dividend tax credit rate from 2.9863% to 1.9863%, effective January 1, 2027. In plain terms: as corporate tax on small business income goes down, the personal tax credit that offsets double-taxation on dividends paid out of that income goes down too — which nudges up the effective personal tax rate on non-eligible dividends paid to owner-managers starting in 2027 (from 47.74% to 48.89% combined top rate). For owner-managers who actively split compensation between salary and dividends, this is worth revisiting as part of year-end 2026 planning, not treating as a footnote to the corporate rate cut.

What Should GTA Business Owners Do Before July 1, 2026?

• Confirm your fiscal year-end and get an actual blended-rate calculation for the transition year rather than assuming the flat 2.2% applies immediately.
• Revisit salary-vs-dividend mix for 2026 and 2027 given the offsetting dividend tax credit change.
• Don’t assume associated-corporation groups need to do anything new — the $500,000 limit allocation mechanics are unchanged, only the rate applied within it.
• Flag it for your bookkeeper if you use tax software that calculates instalments off a flat rate assumption — a mid-year rate change is exactly the kind of thing that produces a stale instalment estimate.

Frequently Asked Questions

What is Ontario’s small business corporate tax rate in 2026?

Ontario’s small business (lower) corporate tax rate is 3.2% until June 30, 2026, and 2.2% from July 1, 2026 onward. Most corporations with a calendar fiscal year will see a blended rate of roughly 2.7% for the 2026 tax year specifically.

When does Ontario’s small business tax cut take effect?

July 1, 2026, as announced in the 2026 Ontario Budget tabled March 26, 2026. The cut is not retroactive to January 1, 2026.

How much money will my corporation save from the Ontario small business tax cut?

Ontario estimates savings of up to $5,000 per year for a CCPC earning the full $500,000 small business limit, once the 2.2% rate is fully in effect for a full tax year (starting with tax years beginning on or after July 1, 2026).

Does the small business limit change along with the rate?

No. The $500,000 small business limit — federally and in Ontario — is unchanged. Only the tax rate applied to income within that limit is dropping.

What happens if my corporation’s fiscal year straddles July 1, 2026?

The CRA prorates the tax rate based on the number of days in your tax year that fall before and after July 1, 2026, producing a blended rate for that transition year. A corporation with a December 31 year-end lands near a 2.7% blended Ontario rate for 2026.

Is this rate cut related to the change in Ontario’s dividend tax credit?

They’re connected but separate measures. To keep personal-corporate tax integration roughly neutral, Ontario is also lowering its non-eligible dividend tax credit rate from 2.9863% to 1.9863%, effective January 1, 2027 — which modestly increases the personal tax cost of non-eligible dividends starting that year.

Sources: 2026 Ontario Budget — Ministry of Finance · CRA — Corporation tax rates · Income Tax Act, s.125 — Small Business Deduction

Reviewed by Bader A. Chowdry, CPA, CA, LPA on August 18, 2026.