Atlantic Canada Business and Tax Compliance: HST, Registries and Rates

Atlantic Canada business and tax compliance is simpler than in most regions in one respect: all four Atlantic provinces use the harmonized sales tax (HST), so there is one sales tax and one return, administered by the Canada Revenue Agency (CRA). The differences are the HST rate, the provincial registries and the corporate tax rates, several of which changed in 2025 and 2026. This guide covers Nova Scotia, New Brunswick, Prince Edward Island and Newfoundland and Labrador for owners in Halifax, Moncton, Charlottetown and St. John's, including U.S. and India-linked owners.

Atlantic Canada business and tax compliance: what is the HST rate?

The tax follows the place of supply, so a Moncton consultant billing a Halifax client may charge Nova Scotia's 14%, not New Brunswick's 15%. Register once your taxable revenue passes $30,000 in a single quarter or four consecutive quarters. Everything else about registration, input tax credits, filing frequency and penalties is explained in our GST/HST guide. Nova Scotia businesses should update invoicing systems, because a program still set to 15% overcharges customers.

What corporate tax rates apply in the Atlantic provinces?

The CRA collects provincial corporate tax in all four provinces. The table shows the CRA's current lower and higher rates and business limits.

Newfoundland and Labrador has announced further cuts to its lower rate, to 1.5% on January 1, 2027 and 1% on January 1, 2028. When a rate or limit changes mid-year, the CRA prorates by days. The CRA's separate pages for individual provinces can lag behind the main table, so use the main table and "what's new" page, and confirm your year-end with your Canadian CPA. With the federal 9% small business rate, the combined rate on income inside the limit is about 11.5% in New Brunswick, 10.5% in Nova Scotia, 10% in Prince Edward Island and 11% in Newfoundland and Labrador in 2026. See the small business deduction guide for the federal side and the CCPC tests.

How do the provincial registries work?

New Brunswick. The Corporate Registry offers online incorporation through its Online Filing Centre and e-filed annual returns: Form 24.3 for provincial corporations, Form 33.1 for extra-provincial corporations and Form 35.1 for non-profits. It also hosts a beneficial ownership register page, changes of directors and registered office, and certificates of status. Copies and certified copies cost $10 and $20.

Newfoundland and Labrador. All corporations operating in the province must be registered. Annual returns are due before the end of the month in which the corporation was registered, amalgamated or revived, and online filing is available through Companies and Deeds Online. Missing the anniversary month puts the company in "Not in Good Standing" status, and years of non-filing can lead to dissolution. The registry's notice lists $100 a year for local companies with share capital from 2017, so confirm the current fee. Since April 1, 2022 most corporations with share capital created under the province's Corporations Act must keep a register of individuals with significant control: 25% of voting shares or fair market value, updated at least annually and within 15 days of new information. It is an internal record and is not filed.

Nova Scotia. The Registry of Joint Stock Companies requires most businesses and non-profits to register before they operate and to renew their registration and pay a fee every year they continue. Fee schedules and processing dates are posted on its site.

Prince Edward Island. PEI runs its own corporate registry; confirm filing requirements and any ownership register there, since this guide could not confirm its current text.

Our annual returns and registers guide compares these registries with the federal and Ontario rules.

Payroll and other taxes

CPP, EI and income tax withholding follow the federal rules in the payroll guide. Each province has its own workers' compensation board, and some provinces levy payroll-based taxes, so ask your Canadian CPA what applies to your province and size.

Worked example: Halifax and St. John's CCPCs

Harbour Coast Marine Ltd. is a Halifax CCPC with $450,000 of 2026 active business income. Federal tax at 9% is $40,500 and Nova Scotia tax at 1.5% is $6,750, a total of $47,250 or 10.5%. A St. John's CCPC with the same income pays $40,500 federally and, at 2.0%, $9,000 provincially, for $49,500 or 11%. On a $10,000 consulting invoice to a Nova Scotia customer, the HST at 14% is $1,400; the same invoice at 15% would be $1,500. The Halifax company renews its registry registration every year and files its T2 six months after year-end.

Documents to have ready

• Registry incorporation or registration confirmation and renewal notices.
• CRA business number, HST account and payroll account details.
• Ownership records for the ISC or beneficial ownership register.
• Invoices showing the HST rate by customer location.
• Financial statements for the T2 and a tax-year-by-rate schedule when rates change.

Mistakes to avoid

• Charging 15% HST in Nova Scotia after April 1, 2025.
• Using the federal $500,000 business limit for Nova Scotia or PEI without checking the provincial limit.
• Missing the Newfoundland and Labrador anniversary month for the annual return.
• Forgetting to renew a Nova Scotia registration each year.
• Treating all four provinces as identical because the HST is shared.

A note for U.S.- and India-linked owners

A U.S. or Indian investor entering Atlantic Canada often uses a subsidiary, which is not a CCPC if non-residents control it and therefore pays the higher provincial rate. See our pages on a U.S. company entering Canada and an Indian company entering Canada, the U.S.-Canada treaty guide and the India-Canada business structures guide. U.S. owners of a regional subsidiary should read our foreign business reporting guide, and Indian investors can start with India FDI and FEMA reporting.

How we can help

We are a U.S. CPA firm in Aurora, Illinois. We coordinate Atlantic Canada operations with your Canadian CPA, who files the HST and T2 returns and handles provincial registries, and with your Indian Chartered Accountant, and we prepare the matching U.S. reporting. See our business formation and registrations and sales tax and GST compliance services.

Frequently asked questions

General information only. It is not tax, legal, accounting or immigration advice for your situation, and rules change; confirm the current rules with the official source or a licensed professional in the relevant country.