Corporate tax in Atlantic Canada: no separate return, and the 2026 rates

Summary

If your corporation earns its profit in Nova Scotia, New Brunswick, Prince Edward Island or Newfoundland and Labrador, there’s no separate provincial corporate tax return. All four provinces have an agreement with the federal government under which the Canada Revenue Agency works out and collects the provincial corporate income tax as part of the T2, the income tax return every Canadian corporation files once a year.¹ You file one return, make one final payment, and pay one set of instalments, which are the advance payments a corporation makes through the year against the tax it expects to owe.

The province charges a second percentage on the same profit figure the federal part of the T2 has already produced, so the profit isn’t worked out twice. Each province runs two rates, and the lower one covers the first slice of profit you make from actually running the business, federally the first $500,000 a year, a break called the small business deduction. The higher one covers profit above that cap, and only the dollars above it. Add the two layers together, and for a tax year ending December 31, 2026 your corporation pays:²

• Prince Edward Island: 10% in total on the first $500,000 of profit, 16% on the next $100,000, and 30% above $600,000.
• Nova Scotia: 10.5% on the first $500,000, 16.5% on the next $200,000, and 29% above $700,000.
• Newfoundland and Labrador: about 11% on the first $500,000, and about 30% above that.
• New Brunswick: about 11.5% on the first $500,000, and about 29% above that.

In our view the gap between the four provinces is too small to be a reason to move your business or incorporate somewhere else: at or below $500,000 of profit, only about 1.5 percentage points of tax separate the cheapest province (Prince Edward Island) from the dearest (New Brunswick). The gap widens above $500,000, where only Nova Scotia and Prince Edward Island keep a lower rate running.³ A company earning $700,000 pays about $30,000 a year less in Nova Scotia than it would in New Brunswick.² What can genuinely change which province suits you is investment income piling up inside the company, on money the business has put aside rather than spent. Federal rules take the lower rate away once there’s enough of that income, and in three of the four provinces the provincial rate goes with it. New Brunswick is the exception.

The single return

All four provinces write their own corporate tax law and hand the administration of it to Ottawa. New Brunswick’s Department of Finance describes its corporate income tax as “administered and collected by the federal government through the Canada Revenue Agency”, and the other three say the same in their own words.¹ So there’s no Nova Scotia corporate return, and no New Brunswick corporation tax filing sitting apart from the T2.

Your preparer works the province’s tax out on a Canada Revenue Agency worksheet that isn’t filed with the return (e.g. Schedule 346 for Nova Scotia). The total goes on the T2 itself at line 760, and the province is named a few lines above it at line 750. A further form, Schedule 5, comes into it in only three cases: a business presence in more than one province or territory, a claim for a provincial credit, or a Newfoundland and Labrador tax that isn’t income tax.⁴ Provincial tax rides on the same instalments and the same balance-due day as the federal tax, that day being the date the rest of the year’s tax has to be settled. Don’t assume this single-return arrangement covers the whole country: Alberta and Quebec administer their own corporate tax, and a corporation with a business presence in either really does file a second return.

The 2026 rates in the four provinces

For 2026, if your company is a Canadian-controlled private corporation (broadly, a private company controlled by people who live in Canada), the federal government taxes the first $500,000 of profit from running the business at 9%, and profit above that at 15%.⁵ Tax law calls that profit active business income, as against profit on investments, which comes further down. Each province then charges its own two rates on top:³

• Nova Scotia: 1.5% on the first $700,000 of active business profit, the province having set its cut-off above the federal $500,000, and 14% above that.
• New Brunswick: 2.5% on the first $500,000, and 14% above that.
• Prince Edward Island: 1% on the first $600,000, and 15% above that.
• Newfoundland and Labrador: 2% on the first $500,000, the federal cut-off rather than one of its own, and 15% above that.

A higher provincial cut-off buys less than it looks like it should. Between $500,000 and $700,000 of profit a Nova Scotia company still pays the federal 15%, because Ottawa’s own limit stopped at $500,000. Only the provincial layer stays down, at 1.5% rather than 14%. Across the full $200,000 in that band that’s worth about $25,000 of tax a year, against what the same company would pay if Nova Scotia stopped its lower rate at $500,000 too.²

Which province your profit belongs to

The phrase that settles it is “permanent establishment”, tax law’s term for a real business presence in a place. A permanent establishment is usually a fixed place of business (e.g. an office, a workshop, a warehouse, a farm or a factory). One also arises where you keep an employee or agent somewhere who has general authority to sign contracts for you.⁶ If your corporation has a permanent establishment in one province and none anywhere else, all of its profit counts as earned in that province, and most owner-managed companies in the region are in exactly that position.

Customers on their own don’t create one, and with no permanent establishment in a province, no part of your profit is earned there, however many invoices you send into it. Where you do have one in two or more provinces, your profit is split by a formula: half on each province’s share of your gross revenue (i.e. total sales before costs), half on its share of your salaries and wages. Your $500,000 of low-rate profit is divided in the same proportions, so part of it is taxed at the second province’s rate whether that province is dearer than your own or not. Registering to do business in another province is a separate step at that province’s corporate registry, and it’s company law rather than tax.

Passive investment income

Federally, the $500,000 small business limit starts shrinking once your corporation earns more than $50,000 a year of investment income (e.g. interest, rent and most dividends on money sitting in the business rather than working in it). The count takes in any companies your corporation is associated with, broadly other companies controlled by you or your family. Tax law calls it adjusted aggregate investment income, and the limit is gone altogether at $150,000 of it. The count runs off the previous calendar year, so income you earn this year shrinks next year’s limit rather than this year’s.⁷

New Brunswick is the one Atlantic province that ignores this shrinking when it charges its own tax. A New Brunswick company keeps the 2.5% provincial rate however much investment income it earns. Only that one reduction is switched off, though, and a second and older federal reduction applies in New Brunswick as it does everywhere, shrinking the same limit once the group’s assets and equity measured for tax (its “taxable capital”) pass $10 million. A portfolio big enough to push it past that line does reach the New Brunswick rate. Nova Scotia, Prince Edward Island and Newfoundland and Labrador follow the federal reduction in full, so those three provincial lower rates go at the same moment the federal $500,000 limit does. In those three provinces, profit that would have been taxed at about 10% to 11% in total is taxed at about 29% to 30% instead once the limit has gone.

How often this changes

Once a year, before your year-end rather than after it, check again which province your profit belongs to and what that province’s rates are, and do it sooner if one of the following happens.

• A provincial budget moves a rate or a cut-off, the way Newfoundland and Labrador’s 2026 budget did in announcing that its lower rate falls again to 1.5% on January 1, 2027 and to 1% on January 1, 2028. As at August 2026 only the 2% step had been written into the province’s own law, so the two later cuts are announced rather than in force.⁸
• Your year-end isn’t December 31, so a tax year of yours can straddle a rate change. Such a year is worked out by counting the days at each rate, which for a year in progress now means Newfoundland and Labrador’s move to a 2% rate on January 1, 2026.
• Your company’s investment income, added to that of any associated companies, passes $50,000 in a calendar year, which shrinks the following year’s limit. Or your corporation stops being a Canadian-controlled private corporation, which ends the lower rate outright.
• You open an office, leave substantial equipment on a site, or put someone with signing authority into a second province. Any of those creates a permanent establishment there and drags in the sales-and-wages split above.

Closing thoughts

Two reliefs this page doesn’t cover in full are worth naming, because for many owners more money rides on them than on any rate above. One is the federal Atlantic investment tax credit, worth 10% of the cost of qualified property such as new equipment or buildings bought mainly for use in the Atlantic region in manufacturing or processing, farming, fishing or logging.⁹ The other is Nova Scotia’s New Small Business Tax Deduction, which the province says removes provincial corporate income tax entirely for the first three taxation years after incorporation, subject to conditions worth checking first.¹⁰ Ask about both before assuming the rates above are the whole bill.

How we handle it

We file the T2 with the provincial calculation inside it, name the right province at line 750 and put the provincial tax at line 760. Before the year closes we check whether investment income is quietly shrinking next year’s small business limit. We prepare your company’s T2 and your personal T1 together, so the salary and dividends the company reports paying you match what you report receiving.