A Practical Guide to Corporate Law for Ontario Businesses

1. Incorporating A Business in Ontario

One of the first major legal decisions many business owners face is whether to incorporate. Incorporation creates a separate legal entity for the business. This means the corporation can own property, enter contracts, borrow money, sue, and be sued in its own name.

For many Ontario businesses, incorporation can offer important advantages. It may help separate business liabilities from personal assets, create a more formal ownership structure, and make it easier to bring in investors, partners, or future buyers. It can also support tax planning, though tax advice should always be reviewed with an accountant.
Incorporation is not always necessary at the very beginning. A sole proprietor or partnership may be simpler to operate in the early stages. However, as the business grows, takes on more risk, hires staff, signs larger contracts, or purchases major assets, incorporation may become more important.

Incorporation also comes with responsibilities. Corporations must maintain corporate records, file annual returns, keep proper minute books, and follow certain governance requirements. The business owner is no longer just “doing business”; they are managing a legal entity.

A lawyer can help determine whether incorporation makes sense, prepare the required documents, organize the corporate structure, and help ensure the company is properly set up from the start.

2. Why Every Ontario Business Needs a Strong Shareholders’ Agreement

When a corporation has more than one owner, a shareholders’ agreement is one of the most important documents the business can have.

A shareholders’ agreement sets out the rights and responsibilities of the owners. It can explain how decisions are made, what happens if there is a disagreement, how shares can be sold or transferred, and what happens if one shareholder wants to leave the business.

Without a clear agreement, business partners may be forced to rely on general corporate law rules or expensive litigation when something goes wrong. That can be stressful, disruptive, and costly.

A strong shareholders’ agreement can deal with many practical issues, including:

• Who has decision-making authority
• How major business decisions are approved
• What happens if a shareholder dies, becomes disabled, or wants out
• Whether shares can be sold to outsiders
• How disputes will be handled
• How the business will be valued if someone exits

These issues may feel uncomfortable to discuss when the business relationship is going well. But that is exactly when they should be addressed. It is much easier to agree on fair rules before a conflict begins.

For family businesses, professional partnerships, startups, and closely held corporations, a shareholders’ agreement can protect both the business and the people behind it.

3. Commercial Contract Review: What Business Owners Should Watch For

Contracts are part of everyday business. Businesses sign agreements with clients, suppliers, landlords, lenders, contractors, employees, consultants, and service providers. Some contracts are short and simple. Others are long, technical, and full of legal language.

A commercial contract review helps business owners understand what they are agreeing to before they sign. This can include reviewing payment terms, deadlines, renewal clauses, termination rights, liability limits, indemnities, warranties, dispute resolution terms, and obligations after the contract ends.

One common mistake is focusing only on the business terms, such as price and timing, while missing the legal terms that create risk. For example, a contract may include broad indemnity language that makes one party responsible for losses beyond what they expected. A renewal clause may lock a business into another term unless notice is given by a specific deadline. A termination clause may make it difficult to exit the agreement if the relationship stops working.

Contract review is not just about finding problems. It is also about improving clarity. A good contract should explain what each party must do, when they must do it, what happens if they do not, and how disputes will be handled.

Before signing an important commercial agreement, it is often worth having a lawyer review the document and explain the risks in plain language. Learn more about what businesses should look for when drafting or signing a commercial contract here. 

4. Common Mistakes Ontario Businesses Make with Written Contracts

Even when businesses use written contracts, problems can still happen if the agreement is unclear, incomplete, or not properly updated.

One common issue is using a contract copied from another business or found online. While templates can be helpful starting points, they may not reflect the actual deal, the laws that apply, or the specific risks facing the business.

Another common mistake is leaving key terms vague. Phrases like “as soon as possible,” “reasonable effort,” or “standard services” may sound fine at the time, but they can lead to disagreement later. A clear contract should define important obligations, timelines, payment terms, deliverables, and approval processes.

Businesses also run into trouble when they continue working after a contract has expired or when the actual working relationship changes, but the contract does not. For example, a supplier agreement may begin with one scope of work but expand over time without a formal amendment. If a dispute arises, it may be unclear what terms apply.

Other common contract mistakes include:

• Missing termination rights
• No clear payment deadline
• No process for handling changes
• Weak confidentiality language
• No dispute resolution clause
• Signing without understanding personal guarantees
• Failing to keep signed copies

Good contracts reduce confusion. They give both sides a shared understanding of the deal and create a roadmap if something goes wrong. Learn more about common contract mistakes here.

5. Buying Or Selling a Business in Ontario

Buying or selling a business is a major legal and financial decision. Whether the transaction is small or complex, the details matter.

One of the first questions is whether the deal will be structured as an asset purchase or a share purchase. In an asset purchase, the buyer usually purchases specific assets of the business, such as equipment, inventory, goodwill, customer lists, and contracts. In a share purchase, the buyer purchases the shares of the corporation that owns the business.

Each structure has different legal, tax, and risk considerations. Buyers often prefer asset purchases because they may be able to choose which assets and liabilities they take on. Sellers may prefer share purchases for tax or simplicity reasons. The right structure depends on the business, the parties, and the advice of legal and tax professionals.

A business purchase agreement should address the purchase price, payment terms, closing conditions, representations and warranties, employee matters, leases, contracts, liabilities, non-competition or non-solicitation terms, and what happens if the deal does not close.

Sellers should also prepare for the transaction before going to market. This may include organizing corporate records, reviewing contracts, addressing outstanding disputes, and making sure financial and legal documents are ready for buyer review.

For both buyers and sellers, legal advice early in the process can help avoid delays, misunderstandings, and unpleasant surprises near closing.

6. Due Diligence When Buying a Business

Due diligence is the process of investigating a business before completing a purchase. It helps the buyer understand what they are buying, what risks exist, and whether the deal terms should change.

Legal due diligence may include reviewing corporate records, contracts, leases, financing documents, employee agreements, permits, licenses, litigation, intellectual property, tax issues, and outstanding debts or liabilities.

For example, a business may appear profitable, but the buyer may discover that an important customer contract cannot be assigned without consent. A lease may be close to expiry with no renewal option. Equipment may be financed or subject to security interests. The corporation may have missing minute book records or unresolved shareholder issues.

Due diligence can also reveal whether the seller has the authority to sell the assets or shares, whether the business is properly organized, and whether any third-party approvals are needed before closing.

This process is not just about looking for reasons to walk away. It helps the buyer make an informed decision. Sometimes the answer is to proceed, but with revised terms, additional protections, a lower purchase price, or specific conditions that must be satisfied before closing.

For buyers, due diligence is one of the most important parts of a business purchase. It is much better to discover a problem before closing than after the money has changed hands.
Good contracts reduce confusion. They give both sides a shared understanding of the deal and create a roadmap if something goes wrong.

7. What Happens to Contracts When a Business Is Sold?

Many business owners assume that when a business is sold, its contracts automatically transfer to the buyer. That is not always the case.

The answer depends on the type of transaction and the terms of each contract. In a share purchase, the corporation usually remains the same legal entity, so many contracts may continue under the corporation’s name. However, some agreements include change-of-control clauses that require notice or consent if ownership changes.

In an asset purchase, contracts often need to be assigned from the seller to the buyer. This may require consent from the other party. Leases, supplier agreements, franchise agreements, customer contracts, licensing arrangements, and financing documents may all have assignment restrictions.

This can be a major issue if certain contracts are essential to the business. For example, if the business relies on a key commercial lease, the buyer will want to know whether the landlord must approve an assignment. If the business depends on a major customer contract, the buyer will want to confirm whether that contract can continue after closing.

Contract transfer issues should be reviewed early in the transaction. Waiting until the end can delay closing or create leverage problems between the parties.

A lawyer can review the contracts, identify consent requirements, prepare assignment documents, and help ensure important agreements are properly dealt with as part of the sale.

For both buyers and sellers, legal advice early in the process can help avoid delays, misunderstandings, and unpleasant surprises near closing.

8. How To Reduce Legal Risk When Growing Your Business

Growth is exciting, but it can also increase legal risk. As a business expands, it may sign larger contracts, hire more people, take on financing, open new locations, enter new partnerships, or serve more customers. Each step can create new obligations.
Reducing legal risk does not mean avoiding growth. It means building better systems around it.

For many businesses, this starts with proper documentation. Written contracts should be clear, current, and tailored to the business. Corporate records should be maintained. Shareholder or partnership arrangements should be documented. Leases, financing agreements, employment arrangements, and supplier contracts should be reviewed before signing.

Business owners should also pay attention to decision-making authority. As companies grow, more people may negotiate, approve, or sign agreements. Clear internal rules can help prevent unauthorized commitments or inconsistent terms.

Another important step is reviewing legal documents before major changes. This may include opening a second location, bringing in an investor, buying another business, selling assets, entering a long-term lease, or changing ownership.

Dispute prevention is also part of risk management. Many disputes arise from unclear expectations, missing documents, late payments, or informal arrangements that were never properly recorded.

A business does not need to be perfect to be protected. But it does need to be organized. Regular legal check-ins can help identify issues before they become expensive problems.

Corporate Law: Frequently Asked Questions