Sole proprietorship in Ontario: how to set up and what to know

Published Wednesday 5 August 2026

Table of contents

• What is a sole proprietorship in Ontario?
• Sole proprietorship vs other business structures in Ontario
• How do you register a sole proprietorship in Ontario?
• What taxes do sole proprietors pay in Ontario?
• How to keep your books as a sole proprietor in Ontario
• Simplify your sole proprietorship finances with Xero
• FAQs on sole proprietorship in Ontario

Key takeaways

• A sole proprietorship in Ontario is the simplest business structure to set up, with no incorporation paperwork and low upfront costs, but it comes with unlimited personal liability that puts your personal assets at risk if the business faces legal or financial trouble.
• You must register your business name with the Ontario Business Registry if you operate under any name other than your own legal name, and this registration is valid for five years before renewal is required.
• Sole proprietors report business income on their personal tax return using Form T2125, pay both employee and employer portions of Canada Pension Plan (CPP) contributions, and must register for harmonized sales tax (HST) once revenue exceeds $30,000 in any four consecutive quarters.
• Incorporating offers liability protection and tax planning advantages that sole proprietorships lack, but it comes with higher setup costs and ongoing administrative requirements that may not be necessary for early-stage or low-risk businesses.

What is a sole proprietorship in Ontario?

A sole proprietorship in Ontario is the simplest business structure you can choose when you start working for yourself. It's an unincorporated business owned and run by one person, where there's no legal separation between you and your business. If you're a freelancer, consultant, contractor, or running a small service business, you're likely operating as a sole proprietor, often without even realizing it.

The moment you start earning income from self-employed work in Ontario, you're automatically considered a sole proprietor unless you've registered a corporation or partnership. You don't need to file incorporation papers or set up a complex legal entity. This makes it the fastest, lowest-cost way to start a business in Ontario Canada.

However, this simplicity comes with trade-offs. Because you and your business are legally the same, you have unlimited liability. That means your personal assets – your home, car, savings – are at risk if the business faces debts or lawsuits. It's a structure that works well for low-risk ventures and solo work, but it's worth understanding the full picture before you commit.

Pros and cons for Ontario sole proprietors

Understanding the advantages and disadvantages helps you decide if this structure fits your business goals and risk tolerance.

Advantages

Consider these benefits:

• Easy and fast setup: No incorporation paperwork, no legal fees to get started, and you can begin trading immediately under your own name
• Low cost: You avoid incorporation fees and ongoing corporate filing requirements
• Simple tax reporting: You report business income on your personal tax return, which keeps things straightforward
• Full control: You make all decisions without consulting partners or shareholders
• Privacy: Unlike corporations, you don't need to file public annual returns that disclose financial information

Disadvantages

Consider these cons:

• Unlimited personal liability: If your business is sued or can't pay its debts, creditors can go after your personal assets
• Limited tax planning: You can't split income with family members or take advantage of the small business tax rate available to corporations
• Harder to raise capital: Banks and investors are often hesitant to lend to unincorporated businesses, and you can't sell shares to raise funds
• Name protection limits: Registering a business name in Ontario doesn't give you exclusive trademark rights across Canada
• Perception: Some clients or partners prefer to work with incorporated businesses, seeing them as more established

The decision to set up as a sole proprietorship vs partnership or corporation often comes down to your risk tolerance, growth plans, and how much administrative complexity you're willing to handle. For many Ontario solopreneurs, a sole proprietorship is the right starting point, with the option to incorporate later as the business grows.

Sole proprietorship vs other business structures in Ontario

Choosing the right business structure affects your liability, taxes, and administrative requirements. Here's how the main options compare for Ontario business owners.

Sole proprietorship vs corporation

Choosing between a sole proprietorship vs corporation in Ontario structure? It depends on your income, risk, and growth plans. Here's how they compare:

• Liability protection: A corporation is a separate legal entity, which means your personal assets are generally protected if the business is sued or goes into debt. A sole proprietorship offers no separation – you and the business are one, so your personal assets are exposed.
• Setup and ongoing costs: Incorporating costs around $300 to $1,000+ depending on whether you use a lawyer or online service, plus annual filing fees and legal compliance. A sole proprietorship costs $60 to register a business name, with minimal ongoing costs.
• Tax planning: Corporations can take advantage of the small business deduction (lower tax rate on the first $500,000 of active business income), income splitting with family members (within CRA rules), and deferral strategies. Sole proprietors are taxed at personal rates with fewer planning options.
• Name protection: Incorporating gives you exclusive rights to your business name across Canada. Registering a business name as a sole proprietor only protects it within Ontario and doesn't prevent others from trademarking it.
• Administrative complexity: Corporations must file annual returns, maintain corporate records, hold director meetings, and file separate tax returns. Sole proprietors report business income on their personal return with far less paperwork.

When to consider switching

Many owners start as sole proprietors and incorporate later when profits grow, liability risk increases, or they want to bring in investors. Common triggers include crossing $100,000+ in annual profit, hiring employees, signing large contracts, or expanding into higher-risk work.

Sole proprietorship vs partnership

A general partnership is a business owned by two or more people who share profits, losses, and management responsibilities. Like a sole proprietorship, a general partnership is unincorporated, which means all partners carry unlimited personal liability for the business's debts and legal obligations.

Here's how the two structures compare:

• Ownership: A sole proprietorship has one owner. A partnership has two or more, with each partner's share defined by a partnership agreement.
• Liability: Both structures expose owners to unlimited personal liability. In a partnership, each partner can be held responsible for the actions of the other partners.
• Tax filing: Partners each report their share of business income on their personal tax returns. There's no separate partnership tax return, though a T5013 information return may be required.
• Setup cost: Registering a general partnership in Ontario costs $60 online through the Ontario Business Registry, the same as a sole proprietorship. A partnership agreement drafted with a lawyer adds cost but is strongly recommended.

A partnership may suit you if you're starting a business with a co-founder and want to keep things simple without incorporating. If you're working alone, a sole proprietorship remains the simpler choice.

A general partnership in Ontario sits between a sole proprietorship and incorporation, as it allows multiple owners but still carries unlimited liability. If you're working with a partner, you'll need to weigh the sole proprietorship vs partnership vs corporation options carefully, ideally with input from an accountant.

How do you register a sole proprietorship in Ontario?

If you plan to operate under your own legal name – for example, "Jane Smith" providing consulting services – you don't need to register a business in Ontario Canada at all. You can start working, invoice clients, and file taxes without any formal registration.

But if you want to use a business name – say, "Smith Consulting" or "Lakeshore Design Studio" – you must register a business name in Ontario through the Ontario Business Registry. This is required under the Business Names Act and ensures your chosen name is on the public record.

Registration gives you the legal right to operate under that name in Ontario for five years. It doesn't protect your name as a trademark, and it doesn't create a separate legal entity. It simply registers your intent to do business under a name other than your own.

You'll also need to set up accounts with the Canada Revenue Agency (CRA) if you're charging HST, hiring employees, or importing goods. These federal registrations are separate from your Ontario business name registration.

Steps to register a sole proprietorship in Ontario

Follow these steps to complete your registration and get your business set up properly with all required accounts and permits.

1. Decide on your business structure

Before you register, confirm that a sole proprietorship fits your needs. If you're working alone, have manageable risk, and want to keep admin simple, it's a good fit. If you're planning to bring in partners, consider a general partnership Ontario structure instead. If you need liability protection or tax planning, incorporation may be better.

2. Choose and search your business name

Pick a name that's clear, memorable, and not too similar to existing businesses. Search the Ontario Business Registry to check if your name is already in use. Unlike corporations, you don't need a New Upgraded Automated Name Search (NUANS) report for sole proprietorship name registration in Ontario, but you should still do a basic search to avoid conflicts and potential legal issues later.

3. Register your business name

Complete your sole proprietorship Ontario registration online through the Ontario Business Registry. You'll need to provide your legal name, business name, business address, and a brief description of your business activities. The registration fee is $60 for online filings, and your registration is valid for five years. Save your confirmation and set a reminder for renewal.

4. Get a business number from CRA

If you're registering for HST, payroll, or import-export accounts, you'll need a business number from the Canada Revenue Agency. You can apply online through the CRA's Business Registration Online service. Even if you're not required to register for HST yet, having a business number makes it easier to open a business bank account and manage CRA filings.

5. Check for licences and permits

Depending on your industry and location, you may need municipal business licences, health permits, or professional certifications. Use the BizPaL tool to identify which permits apply to your business. Some municipalities also require a Master Business Licence that covers multiple local permits.

6. Open a business bank account

Keep your business finances separate from personal spending. A dedicated business account makes bookkeeping cleaner, simplifies tax filing, and helps you track business expenses accurately. Most banks will ask for your business name registration and business number when you open the account.

7. Set up your bookkeeping system

Create a simple workflow for capturing receipts, tracking income, and categorizing expenses. Set up a basic chart of accounts that matches CRA categories for business expenses. This prep work makes HST filing and year-end tax much easier.

8. Calendar your renewal date

Your business name registration expires after five years. Mark the renewal date in your calendar so you don't lose your registration. Renewals can be done online through the same Ontario Business Registry portal.

What taxes do sole proprietors pay in Ontario?

As a sole proprietor Ontario tax filer, you report your business income and expenses on your personal tax return. There's no separate corporate tax return. You'll complete Form T2125 (Statement of Business or Professional Activities) and include it with your T1 return.

Your business income is added to any other income you earn (employment, investments, etc.) and taxed at your personal marginal rate. This means you pay both federal and Ontario provincial income tax on your net business profit.

• Canada Pension Plan (CPP) contributions: Unlike employees, you pay both the employee and employer portions of CPP – currently 11.9% on net self-employment income between $3,500 and the annual maximum ($74,600 in 2026). You can deduct the employer portion when calculating your taxable income.
• Harmonized sales tax (HST) registration and filing: If your business earns more than $30,000 in taxable revenue in a single calendar quarter or over four consecutive quarters, you must register for GST/HST. Once registered, you’ll need to charge HST (13% in Ontario) on taxable sales, collect it from customers, and remit it to the CRA. You can also claim input tax credits (ITCs) for the HST you pay on eligible business expenses.

Even if you're under the $30,000 small supplier threshold, you can choose to register voluntarily. This lets you recover HST on business purchases, which can improve cash flow if you're buying equipment or paying for services with HST.

Quarterly tax instalments: If your net tax owing is more than $3,000 in the current year and either of the two previous years, CRA will ask you to make quarterly installment payments. These are due March 15, June 15, September 15, and December 15. Missing instalments can trigger interest charges, so set money aside throughout the year.

What can you write off as a sole proprietor in Ontario?

You can deduct any reasonable expense you incur to earn business income. Common deductions include:

• Home office expenses: a portion of rent, utilities, or mortgage interest if you use a dedicated space for work and meet the Canada Revenue Agency's (CRA) eligibility criteria
• Vehicle expenses: fuel, insurance, maintenance, and depreciation based on the percentage of kilometres driven for business purposes
• Professional fees: accounting, legal, and consulting costs directly related to your business
• Software and subscriptions: tools and platforms you use to run or manage your business
• Marketing and advertising: website costs, social media ads, business cards, and promotional materials
• Office supplies: stationery, printer ink, and other consumables used for business purposes
• Travel: flights, accommodation, and meals when traveling for business, subject to CRA limits on meal claims

Keep receipts and invoices for every claim. CRA accepts digital copies as long as they're clear and legible.

How to keep your books as a sole proprietor in Ontario

The goal is simple: keep your records clean, accurate, and easy to use for HST filing and year-end tax. You don't need a complex accounting system when you're starting out, but you do need consistency.

• Separate your finances: Open a business bank account and use it exclusively for business transactions. This keeps personal spending out of your books and makes reconciliation faster. If you use a personal credit card for business purchases, track those expenses separately and reimburse yourself from the business account.
• Categorize expenses correctly: Use CRA's business expense categories to organize your spending. Common categories include advertising, vehicle expenses, office expenses, professional fees, and rent. Consistent categorization makes tax filing easier and helps you spot trends in your spending.
• Capture receipts immediately: Don't let receipts pile up in your wallet or glove box. Use a mobile scanner app to photograph receipts as soon as you get them, and store the images in a cloud folder or directly in your accounting software. CRA accepts digital copies as long as they're clear and legible.
• Reconcile your bank account regularly: Match your bank transactions to your accounting records at least once a month. This catches errors early, ensures nothing is missed, and keeps your cash flow picture accurate.
• Set aside money for taxes: A good rule of thumb is to set aside 25-30% of your net income for income tax and CPP. If you're registered for HST, keep that money in a separate account so you're not tempted to spend it before remittance is due.
• Track mileage if you use a vehicle: If you use your personal vehicle for business, keep a mileage log showing the date, destination, purpose, and kilometres driven. CRA allows you to claim vehicle expenses based on the percentage of business use, but you need records to back it up.

Build a simple, paperless workflow

A lightweight, automated setup saves time and reduces errors. Here's how to build one:

• Use cloud accounting software to send invoices, record payments, and reconcile bank transactions daily. Automation handles repetitive tasks so you can focus on client work.
• Connect secure bank feeds to pull transactions into your books automatically. This eliminates manual data entry and keeps your records up to date in real time.
• Capture receipts with a mobile scanner app so documents and data flow straight into your accounting system. No more shoeboxes or lost receipts.
• Run core reports regularly, like profit and loss, balance sheet, HST summary, and cash flow snapshot. These reports show you where your business stands and help you make informed decisions.
• Set quarterly reminders to review HST collected vs HST paid, and set money aside for remittances. This prevents cash flow surprises when filing is due.
• Store contracts and key documents in a single online folder with clear file names. Keep everything organized and accessible for audits, renewals, or legal questions.

Simplify your sole proprietorship finances with Xero

Managing invoicing, HST, and day-to-day bookkeeping is easier when you use online accounting software that updates in real time. You can use Xero to track income and expenses, reconcile bank feeds, and see your cash flow clearly, so you spend less time on admin and more time running your business. Get one month free to try Xero for your Ontario sole proprietorship.

Managing your books doesn't have to be complicated. With the right tools, you can automate invoicing, track HST, reconcile faster, and see your cash flow clearly, all in one place. This keeps admin light so you can focus on growing your business.

FAQs on sole proprietorship in Ontario

Here are answers to common questions Ontario sole proprietors ask when setting up and running their businesses.

Is a NUANS search required in Ontario?

No. Unlike corporations, sole proprietorships don't require a NUANS name search report. However, it's still smart to search the Ontario Business Registry and do a basic Google search to make sure your chosen name isn't already in use or too similar to an existing business.

How much does it cost to register in Ontario?

Sole proprietorship Ontario registration costs $60 when you file online through the Ontario Business Registry. Paper filings cost more. This fee covers a five-year registration period. Renewal after five years costs the same.

When do I need to charge HST in Ontario?

You need to register and start charging harmonized sales tax (HST) once your business earns more than $30,000 in revenue over any four consecutive calendar quarters, and you then have 29 days to register with the Canada Revenue Agency. You can also choose to register earlier if you want to claim input tax credits on your business purchases.

What can I write off as a sole proprietor in Ontario?

You can deduct reasonable expenses you incur to earn business income, such as home office costs, vehicle costs based on business use, professional fees, software, marketing, office supplies, and business travel. The "What can you write off as a sole proprietor in Ontario?" section in the main article explains these categories in more detail.

Can I switch to a corporation later?

Yes. Many sole proprietors incorporate once their income grows or they need liability protection. The process involves setting up a new corporation, transferring contracts and assets, closing your sole proprietorship accounts, and opening new corporate bank accounts. You may also need a new business number and updated licences depending on your industry. Work with an accountant to manage the transition smoothly.

Do I need a separate business bank account?

It's not legally required, but it's highly recommended. A separate business account keeps your personal and business finances apart, making bookkeeping cleaner and tax filing easier. It also helps you track business expenses accurately and provides a clear audit trail if CRA ever reviews your records.

Can a sole proprietor hire employees in Ontario?

Yes, sole proprietors can hire employees. You'll need to register for a payroll deductions account with the CRA and comply with Ontario's employment standards, including source deductions for income tax, Canada Pension Plan (CPP), and Employment Insurance (EI).