Tax Pitfalls in Buying and Selling a Business
Buying or selling a business is often treated as a commercial transaction first and a tax transaction second. That is a mistake. In practice, many of the most expensive disputes arise not from the negotiated purchase price itself, but from tax issues that were overlooked, misunderstood, or left undocumented during the deal process. Both income tax and GST/HST consequences can materially change the economics of a transaction, and many of these issues only surface years later during a CRA audit, when the parties are no longer aligned and the paper trail is incomplete.
Asset Versus Share Sale
One of the most common income tax pitfalls is the failure to properly distinguish between an asset purchase and a share purchase. Buyers often prefer asset acquisitions because they can step up the tax cost of depreciable assets, avoid inheriting unknown liabilities, and selectively acquire what they want. Sellers, however, usually prefer share sales because they may access the lifetime capital gains exemption and receive capital gains treatment rather than income treatment. Too often, parties focus only on price without understanding that the after tax result may be dramatically different depending on structure. A poorly analyzed transaction can leave one side with a significant and unexpected tax burden.
Purchase Price Allocation
Another recurring issue is the allocation of purchase price. In an asset transaction, the allocation among goodwill, inventory, equipment, restrictive covenants, and other intangible assets has major tax consequences. The buyer and seller frequently have competing interests. A seller may want more allocated to goodwill to achieve capital treatment, while a buyer may prefer allocations that generate faster deductions. If the allocation is artificial, inconsistent, or unsupported by the commercial reality, CRA may challenge it. A poorly drafted agreement that simply lists a global purchase price often creates unnecessary audit exposure.
Goodwill Treatment
The treatment of goodwill and restrictive covenants also creates frequent disputes. Since legislative changes to the eligible capital property regime, goodwill must be carefully analyzed within the capital cost allowance framework. Restrictive covenants, including non competition and non solicitation clauses, may also trigger specific tax consequences depending on how they are structured and compensated. Parties often treat these provisions as standard boilerplate without appreciating that separate allocations and reporting obligations may arise.
Working Capital Adjustments
Working capital adjustments and shareholder withdrawals are another common source of reassessment. In closely held businesses, personal and corporate expenses are often blurred. During due diligence, buyers may discover shareholder loans, undocumented withdrawals, management fees, or family expenses paid through the corporation. These issues can trigger shareholder benefit assessments under section 15, income inclusions under section 9, or denied deductions where expenses lack a proper business purpose. Sellers who assume these issues are minor bookkeeping matters often discover they become central tax exposures.
Earn Outs and VTB’s
Earn outs and vendor take back arrangements are also frequently misunderstood. Deferred payments may create disputes over timing, valuation, and characterization. Whether an earn out qualifies for favourable treatment depends heavily on structure and documentation. Without proper planning, a seller may face immediate tax on proceeds not yet received, or a buyer may lose intended deductions. These issues require planning before closing, not after.
GST/HST
On the GST/HST side, one of the most misunderstood issues is whether the transaction is taxable at all. Many parties assume that the sale of a business is automatically exempt from GST/HST. It is not. Unless a specific relieving provision applies, GST/HST may be payable on taxable assets transferred as part of the sale. Section 167 of the Excise Tax Act provides an important election for the sale of a business as a going concern, but it must be properly completed and filed. If the election is missed, the purchaser may face significant unexpected GST/HST exposure and the vendor may remain liable.
Real Property
Real property creates additional complexity. Commercial real estate, mixed use properties, and assignments of leases often involve separate GST/HST analysis from the operating business itself. The treatment of land, buildings, leasehold interests, and tenant inducements can materially affect closing costs and post closing disputes. Many transactions fail because the parties assume the lawyer handling the closing has already addressed GST/HST when no one has actually done so.
Holdbacks & Indemnities
Another common problem arises with holdbacks, indemnities, and post closing adjustments. The tax treatment of these amounts is rarely straightforward. Whether a payment is characterized as a purchase price adjustment, damages, compensation, or reimbursement can affect both income tax and GST/HST treatment. If the agreement is unclear, CRA may impose its own interpretation, usually years later and rarely in the taxpayer’s favour.
Documentation
Finally, documentation remains the single greatest practical issue. CRA audits are won or lost on records. If the legal agreement, tax reporting, financial statements, and actual conduct of the parties do not align, reassessments become far more likely. Verbal understandings, informal side deals, and undocumented adjustments are especially dangerous in owner managed businesses. Good tax planning is not simply technical advice. It is ensuring that the transaction is structured, documented, and reported consistently from the beginning.
Concluding Thoughts
Buying or selling a business should never be approached as a standard closing exercise. It is a tax event with long term consequences. Proper planning before execution is almost always less expensive than defending a reassessment years later. The most successful transactions are those where tax risk is identified early, negotiated clearly, and documented properly before the ink is dry.
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