Ottawa's rental market benefits from a stable, government-driven economy, two major universities, and consistently low vacancy rates, which is why so many homeowners eventually consider buying a second property to rent out. Financing an investment property works differently than financing the home you live in, and getting the financing side right is most of the battle. This guide covers what actually matters.
Down Payment: The First Real Difference
Owner-occupied homes can be financed with as little as 5% down. Investment properties cannot. Most lenders require a minimum of 20% down on a rental property, and that minimum doesn't move much regardless of your income or credit, since default insurance generally isn't available on non-owner-occupied purchases. Some lenders will consider 20% on a duplex if you plan to live in one unit yourself (owner-occupied with a rental component), which is worth exploring if you're buying your first investment property and want the lower entry point.
How Rental Income Actually Counts Toward Qualifying
Lenders use one of two general approaches to factor in rental income from the property you're buying (or an existing rental you already own):
- Add-back method: a percentage of the gross rental income, commonly 50-80% depending on the lender, is added directly to your personal income for qualifying purposes.
- Offset (debt-servicing) method: a percentage of the rental income is used to offset the property's own carrying costs (mortgage payment, property tax, heat) in your debt-service ratio calculation, rather than being added to your income directly.
Which method a lender uses (and at what percentage) meaningfully affects how much you can borrow, which is why shopping this specifically for investment properties, rather than assuming your regular pre-approval math applies, actually matters.
You Still Face the Stress Test
Investment property mortgages are qualified using the same mortgage stress test as owner-occupied purchases, your contract rate plus 2%, or the benchmark rate, whichever is higher. Combined with the higher minimum down payment, this is why investment property qualifying tends to feel noticeably tighter than buying a primary residence.
Using Your Home Equity to Fund the Down Payment
A common strategy is refinancing or opening a HELOC on your primary residence to fund the 20% down payment on a rental property, rather than saving that amount separately in cash. This lets you access equity you already have without selling anything, though it does mean carrying two sources of debt against your overall net worth, which is worth stress-testing honestly before committing.
Running the Cash Flow Numbers Properly
Before buying, model the full picture, not just "does the rent cover the mortgage":
- Gross rent, minus mortgage payment, property tax, insurance, and condo fees (if applicable)
- A maintenance and vacancy reserve, typically 5-10% of gross rent, since something will eventually need repair and units don't stay occupied 100% of the time
- Property management costs if you won't be self-managing
A property that's barely cash-flow positive on paper, with no reserve built in, is a property that goes cash-flow negative the first time a furnace needs replacing.
Single-Family vs. Multi-Unit
A single-family rental is simpler to manage and finance but concentrates your risk in one tenant. A duplex or triplex spreads that risk across multiple units and often produces better rent-to-price ratios in Ottawa, but financing can get more particular above four units, where some lenders shift to commercial-style underwriting.
Scaling Beyond Your First Rental
As you acquire more properties, some conventional lenders cap the total number of financed rental properties they'll carry for one borrower. Alternative and private lenders often step in beyond that point. If you're planning to build a multi-property portfolio, it's worth mapping out the financing path for property three and four before you've even closed on property one.
Tax Considerations (Talk to an Accountant)
Rental income is taxable, mortgage interest on a rental property is generally deductible, and some investors use strategies like the Smith Manoeuvre to structure home equity borrowing in a tax-efficient way. None of this is tax advice, the mortgage structure and the tax outcome are two different conversations, and we'll always point you to a qualified accountant for the tax side before you finalize a strategy.
Ready to Look at Your First (or Next) Rental?
We'll walk through the real numbers, down payment, qualifying income treatment, and cash flow, before you make an offer. See our full investment property mortgage page or talk to Sean directly.