You pay your accountant to keep your taxable income low, and it works. Then a lender reads that same number and concludes you cannot afford the building. Here is how commercial financing gets around that.
On a commercial mortgage the loan amount comes from the property's net operating income divided by a debt service coverage requirement, not from the income line on your tax return.

The business is healthy. Cash flow is fine. You know exactly what the company brings in because you watch the bank account every week. Then you apply for financing and the lender looks at the total income line on your return, sees a modest number, and tells you the file does not support the loan.
It feels like being punished for good accounting, because in a narrow sense that is what it is.
Your accountant's job is to minimise taxable income legally. Depreciation, vehicle and equipment costs, retained earnings left inside the company, deferred compensation: all of it reduces the number that appears on your return. The better that work is, the less you appear to earn.
A conventional residential style underwriter takes that number at face value, because it is verified by the Canada Revenue Agency and requires no judgement. It is the safe number, not the true one. The gap between taxable income and actual cash flow is the entire problem, and it is a documentation problem rather than an affordability one.
Here is the part most self employed borrowers do not know. On a commercial mortgage the property's income usually matters more than yours. The lender is buying a stream of rent or a business occupancy, and it sizes the loan from the property's net operating income divided by a debt service coverage requirement. Your personal return supports the file. It does not set the loan amount. Our guide on how DSCR sets your commercial loan amount walks through the arithmetic.
Underwrite the property, not the person. The main route. Net operating income, a coverage ratio, a loan to value cap, and the lower of the two answers wins. A well tenanted building can carry a large loan for a borrower whose return looks thin. You can test it yourself in the commercial mortgage calculator.
Add backs where they are earned. Depreciation and amortization are non cash and most lenders will add them back. Genuine one time expenses, such as a legal settlement or a single equipment write off, can be added back when they are identified in the statements. This is normal underwriting, not a loophole.
Statements plus notices of assessment, not the return alone. Accountant prepared financial statements show revenue, margin and the discretionary items. The notices of assessment confirm nothing is outstanding with the tax authority. Presented together they tell a complete story that a single return cannot.
Lenders who underwrite the business. Credit unions and alternative lenders will look at bank statement deposits, contracts in hand and the operating history of the company. Credit union pricing is close to bank pricing. Alternative pricing is higher, sometimes considerably, and carries lender fees, so it belongs where the conventional test genuinely cannot be met.
Add backs are not a story you tell. They are a line an underwriter can point at in a document. If a cost was recurring, it stays a cost. If it lives only in your explanation, it will be discounted or removed, and a file built on unsupported add backs falls apart at the credit committee stage, usually late, after you have spent money on reports.
So the practical rule is simple. What you can document is what counts. If the documentation is not there this year, the better plan is often to spend one filing cycle preparing for the application rather than forcing it now at a rate that erodes the return you were trying to protect.
Two years of accountant prepared financial statements and the matching notices of assessment, plus the property address with a rent roll or your current lease if you will occupy it. That is enough to size the deal properly.
If you are buying the building your business operates from, the owner occupied purchase page covers how those files are structured.
Two years of financial statements, your notices of assessment and the property details. We will size what the property supports and tell you where the file fits.