Tax Accountant Ontario
Looking for a trusted accountant in Ontario?
Your Modern Accountant provides expert personal tax filing, self-employed tax returns, corporate T2 filings, and HST services for individuals and businesses across the province — with transparent flat-rate pricing and a fully remote process that works wherever you are in Ontario
Ontario Is Canada’s Most Populous Province — and Its Tax Situations Reflect That
Ontario is home to more than 14 million people, Canada’s largest city, its seat of federal government, and some of the country’s most economically diverse communities. From Toronto‘s Bay Street finance professionals and Mississauga’s incorporated small business owners to Ottawa’s government workers, Hamilton’s tradespeople, and London’s healthcare practitioners — the range of personal and business tax situations across Ontario is enormous.
Your Modern Accountant serves clients across the entire province. We’re a fully remote accounting practice, which means your location within Ontario — whether you’re in the GTA, eastern Ontario, the north, or anywhere in between — doesn’t affect how efficiently we work together. One accountant. One process. Your taxes filed correctly.
Tax and Accounting Services for Ontario Individuals and Businesses
We offer a full range of personal and business tax services to Ontario clients:
- Personal income tax (T1) returns — employment income, T4 slips, investment income, RRSP/TFSA, rental property income, capital gains, foreign assets
- Self-employed and sole proprietor tax — HST registration and remittance, business expense deductions, home office claims, annual T1 preparation
- Rental property income — single units, multi-property portfolios, co-ownership arrangements, capital gains on property sales
- Corporate T2 returns — Ontario incorporated businesses, year-end filings, T4 slip preparation, HST filing, shareholder loan management
- CRA correspondence and audit support — review letters, reassessments, audit representation, notices of objection
- Tax planning — salary vs. dividend analysis, corporate structure review, capital gains planning, RRSP strategy
Ontario Tax: What Makes This Province Different
Ontario operates under the Harmonized Sales Tax (HST) system at a combined rate of 13% (5% federal GST + 8% provincial). This is relevant for every self-employed professional and incorporated business in the province. If your revenue exceeds $30,000 annually, you are required to register for HST with the CRA, collect it from clients, and remit it on a quarterly or annual schedule. Input Tax Credits (ITCs) allow you to recover HST paid on business expenses — but only if your records are properly maintained and your HST returns are filed correctly.
Ontario also has its own provincial income tax rates that stack on top of federal rates, making combined marginal tax rates among the highest in Canada for high-income earners. This is precisely why proactive tax planning — not just annual filing — makes a meaningful financial difference for Ontario residents and business owners. Your Modern Accountant builds this into our higher-tier packages so your accountant is helping you plan, not just file.
Serving Tax Clients Across Ontario — City by City
Our Ontario clients come from every corner of the province. Here’s how the tax landscape differs across the regions we serve:
- Toronto and the GTA (Mississauga, Brampton, Markham, Vaughan, Oakville) — the highest concentration of incorporated businesses, real estate investors, tech and finance professionals, and self-employed contractors in the country. HST compliance, corporate T2 filings, rental income, and capital gains are the most common needs.
- Ottawa and eastern Ontario (Kingston, Belleville, Cornwall) — government employees with RRSP complexity, real estate investors, and a growing freelance and tech community. Federal public sector workers often have pension adjustments (PAs) and defined benefit considerations that affect RRSP room.
- Hamilton, Burlington, and Niagara — manufacturing sector workers, incorporated trades professionals, and small business owners. GST/HST compliance and corporate year-end filings are common. Niagara’s hospitality and tourism industry creates a distinct self-employment and seasonal income profile.
- London, Kitchener-Waterloo, and southwestern Ontario — healthcare practitioners, incorporated professionals, university-town freelancers, and tech startup founders. Professional corporations, salary vs. dividend decisions, and T2 filings are core needs in this region.
- Northern Ontario (Sudbury, Thunder Bay, Sault Ste. Marie) — resource sector workers, remote area allowances, northern residents deductions, and small incorporated businesses serving isolated communities. These are situations that require a tax accountant who knows the applicable federal and provincial rules.
Why Ontario Clients Choose YMA Over a Local Accountant
The traditional accounting firm model involves booking appointments weeks out and driving to an office. That doesn’t fit how most Ontario professionals want to operate in 2026. Your Modern Accountant is built differently.
Our process is entirely online. You use our Tax Package Finder to identify the right service tier for your situation. You book a free consultation by phone or video call. You upload your documents through our secure client portal. We prepare your return, review it with you, and file electronically with CRA. If you need year-round access for a CRA letter in August or an RRSP question in January, that is available through our higher-tier packages.
What Our Clients Say
Frequently asked questions
What is the difference between a personal T1 and a corporate T2 return in Ontario?
A T1 is your personal income tax return, filed annually with the CRA. It captures all personal income sources such as employment, self-employment, rental, investment, and capital gains. A T2 is the corporate income tax return filed by your incorporated company. If you’ve incorporated in Ontario, your company must file its own T2 return separately from your personal T1. Many Ontario small business owners need both filed each year, and the decisions made between them — particularly salary vs. dividend, have a significant impact on your combined tax bill.
Can a tax accountant in Ontario help me reduce what I owe?
Yes — and this is one of the most important reasons to work with a professional rather than filing on your own. A qualified tax accountant in Ontario can identify deductions and credits you may be missing, recommend optimal RRSP contribution timing, advise on salary vs. dividend splits for incorporated business owners, and flag tax planning opportunities specific to your situation. YMA’s higher-tier packages include year-round access to your accountant specifically for this kind of proactive work.
I received a CRA letter or review request. What should I do?
Don’t respond on your own if you’re unsure what you’re looking at. CRA review letters, reassessment notices, and audit requests all have specific response requirements and timelines. Responding incorrectly or missing a deadline can make the situation significantly worse. Your Modern Accountant handles CRA correspondence on behalf of Ontario clients as part of our service packages. We review the letter, advise on the appropriate response, gather supporting documentation, and communicate directly with CRA on your behalf.
Do I need to register for HST in Ontario?
If your total annual revenue from business activities exceeds $30,000, you are required to register for HST with the CRA. This applies to self-employed individuals, freelancers, and incorporated businesses operating in Ontario. Once registered, you collect HST from clients at 13%, remit it to CRA on a quarterly or annual schedule, and claim Input Tax Credits (ITCs) on eligible business expenses. Your Modern Accountant handles HST registration, remittance, and annual reconciliation as part of our self-employed and corporate service packages.
Does YMA serve all of Ontario or only the GTA?
We serve clients across the entire province of Ontario not just Toronto and the GTA. Because our service is fully remote, your location doesn’t matter. We work with clients in Ottawa, Hamilton, London, Kingston, Barrie, Sudbury, Thunder Bay, and every community in between. If you’re in Ontario and need a tax accountant, you’re within our service area.