The Add-Back Method
With the add-back method, a lender takes a percentage of the gross rental income, often around 50 to 80 percent depending on the lender, and adds it to your personal income. This approach is common for owner-occupied properties with a rental suite and tends to be more generous when your income already covers most of your expenses.
The Offset Method
The offset method uses rental income to reduce the mortgage payment on the rental property before it is included in your debt calculations. This method is more commonly used for pure investment properties and can produce different results depending on the size of the mortgage relative to the rental income.
Documentation Lenders Ask For
To use rental income, lenders typically want a signed lease, a market rent appraisal for a new purchase, or two years of tax returns showing rental income history for an existing property. Missing documentation is one of the most common reasons rental income gets excluded from an application.
- Signed lease agreement
- Market rent letter or appraisal
- T776 tax forms for existing rentals
New Purchases vs Existing Rentals
A property you already own with a rental history is usually easier to document than a new purchase where the tenant has not moved in yet. For new purchases, lenders often rely on a market rent appraisal completed by an approved appraiser.
Why the Method Matters for Your Approval
The method a lender uses can change your maximum purchase price significantly, sometimes by tens of thousands of dollars. This is one of the biggest reasons it pays to shop your file across multiple lenders rather than assuming your bank's rules are the only option.
Frequently asked questions
- Do I need a bigger down payment for this type of property?
- In most cases yes, since lenders view these properties as carrying more risk than a standard owner-occupied home. The exact amount depends on the property type, the lender, and your overall financial picture, so it is worth getting a clear answer before you start shopping.
- Can I use projected rental income before I have a tenant?
- Some lenders will accept a market rent appraisal or lease commitment for this, while others want to see an existing lease in place. Rules vary quite a bit between lenders, which is one reason it helps to work with a broker who can compare options.
- How long does approval usually take?
- Timelines vary based on the complexity of the file and whether extra documentation like appraisals or building permits are needed. Starting the conversation early, before you are under a tight closing deadline, generally leads to a smoother process.