This page explains how Canadian lenders count rental income when you apply for a mortgage: CMHC’s rules for insured mortgages, the add-back and rental offset methods, how existing rentals affect a new application, full-time landlords, short-term rental income and the documents lenders ask for. It is part of WealthNorth’s guide to investment property financing. Lenders don’t count rent at face value; how much is included depends on the lender, the type of property, whether the mortgage is insured and how you document the income. Down payment rules and rates for rentals are covered in rental property mortgages.
Two methods lenders use
Canadian lenders count rental income in one of two ways:
| Method | How it works | Where it is used |
|---|---|---|
| Add-back | A share of the rent is added to your income | CMHC’s guidance for insured mortgages; some lenders for uninsured mortgages |
| Rental offset | A share of the gross rent is subtracted from the property’s housing costs in the GDS/TDS calculation | Some lenders, as their own policy |
The share of rent a lender uses is its own policy. It is often half, and some lenders use more. The method and the share both change how much you qualify for, so ask each lender or broker which it uses.
CMHC’s rules for insured mortgages
CMHC’s guidance for insured mortgages adds rental income to your income rather than offsetting it. The limits are maximums; a lender can use less.
- When the rental is the property being insured, up to 50% of its gross rent can be added to your income, and its taxes and heat can be left out of the ratios.
- In an owner-occupied two-unit home, up to 100% of the secondary suite's gross rent can count.
- For other rental properties you own, their net rental income can be added to your income.
- For a three- or four-unit home, or a rental being insured, the lender can instead use the property's net rental income.
- A lender can apply its own guidelines if the result is at least as conservative.
| Situation | What CMHC lets count |
|---|---|
| The home being insured has rental income | Up to 50% of the gross rent added to your income; property taxes and heat can be excluded from the debt service ratios |
| An owner-occupied two-unit home | Up to 100% of the secondary suite’s gross rent |
| Other rental properties you own | Their net rental income, added to your income |
| A home you won’t live in | For a three- or four-unit home, or a rental being insured, the lender can instead use the property's net rental income. A one-unit home you won't live in can't get mortgage insurance at all. |
CMHC’s limits for insured mortgages are 39% for gross debt service (GDS) and 44% for total debt service (TDS).
Example: an owner-occupied home with a basement suite
Illustrative figures: housing costs at the stress-test rate of $3,400 a month for the mortgage, $350 for property tax and $150 for heat, and a legal basement suite rented for $1,800 a month. As a two-unit owner-occupied home, up to 100% of the suite’s rent can count.
| Item | Without suite income | With suite income |
|---|---|---|
| Mortgage payment at the stress-test rate | $3,400/month | $3,400/month |
| Property tax | $350/month | $350/month |
| Heating | $150/month | $150/month |
| Housing costs for GDS | $3,900/month | $3,900/month |
| Gross income needed at 39% GDS | $120,000 | $120,000 |
| Suite rent counted as income ($1,800 × 12 × 100%) | $0 | $21,600 |
| Employment income needed | $120,000 | $98,400 |
In this example the suite lowers the employment income needed by the full $21,600 of rent it brings in each year.
The rental offset method
Instead of adding rental income to your income, a lender using an offset subtracts part of the rent from the property’s housing costs in the GDS/TDS calculation. An illustration at a 50% offset:
| Component | Calculation |
|---|---|
| Gross rental income | $2,000/month |
| Offset ratio | 50% |
| Rental offset amount | $2,000 × 50% = $1,000/month |
| Monthly housing costs (PITH) | $3,200/month |
| Housing costs after offset | $3,200 − $1,000 = $2,200/month |
| This $2,200 is used in the GDS/TDS calculation | Instead of the full $3,200 |
The add-back method with net rental income
For a rental you already own, CMHC’s guidance adds the property’s net rental income to your income, and some lenders do the same. An illustration:
| Component | Calculation |
|---|---|
| Gross rental income | $2,000/month |
| Rental expenses (taxes, insurance, maintenance, vacancy) | −$700/month |
| Net rental income | $1,300/month |
| Your employment income | $85,000/year |
| Total qualifying income | $85,000 + ($1,300 × 12) = $100,600 |
Offset vs add-back on the same rent
| Factor | Offset (50%) | Add-back (net rent) |
|---|---|---|
| Gross rent | $2,000/month | $2,000/month |
| Effect on qualification | Reduces housing costs by $1,000 a month | Increases income by $15,600 a year |
| Where it is used | Some lenders’ own policy | CMHC-insured mortgages and some lenders |
The two methods can give similar or quite different results depending on the property’s costs and your income, so run your numbers with each lender’s method.
Qualifying when you already own a rental
If you already own a rental property and are buying a new home or another investment property, the lender accounts for both the existing rental income and the existing rental costs.
How an existing rental affects your application
| Item | How it is treated |
|---|---|
| Existing rental income | For an insured mortgage, CMHC’s guidance adds the net rental income to your income; other lenders use net income or an offset |
| Existing rental mortgage payment and property taxes | Counted against you, either inside the net rental income or as debts in your TDS ratio, depending on the method |
| Existing rental insurance and other costs | May be included |
Example: buying a home while owning a rental (offset method)
| Item | Value |
|---|---|
| Your employment income | $95,000 |
| Existing rental gross income | $2,400/month |
| Existing rental mortgage payment | $1,800/month |
| Existing rental property taxes | $250/month |
| Lender uses | 50% offset on rental income |
TDS calculation:
| Component | Monthly |
|---|---|
| New home PITH (proposed) | $3,200 |
| Existing rental mortgage + taxes | $2,050 |
| Rental income offset (50% × $2,400) | −$1,200 |
| Net rental property obligation | $850 |
| Other debts (car, credit cards) | $400 |
| Total debt service | $4,450 |
| Monthly gross income ($95,000 ÷ 12) | $7,917 |
| TDS ratio | 56.2%: above the 44% limit |
In this scenario the applicant’s TDS ratio is above CMHC’s 44% limit. Common ways around it are a larger down payment, a co-borrower with income, or a lender whose rental income rules suit the situation.
Full-time landlords
If most of your income comes from rental properties:
| Factor | How lenders treat it |
|---|---|
| Tax returns | Lenders look at the net rental income reported on line 12600 of your recent returns, and may ask for more than one year |
| Form T776 | Gross rents for each rental property, plus rental expenses and CCA (see how rental income is taxed) |
| CCA (capital cost allowance) | CCA is a non-cash deduction, so ask whether the lender adds it back to your net rental income |
CCA add-back
An illustration of what an add-back does, for a lender that allows it:
| Item | Tax return | Lender that adds back CCA |
|---|---|---|
| Gross rental income | $48,000 | $48,000 |
| Expenses (excluding CCA) | −$28,000 | −$28,000 |
| CCA claimed | −$8,000 | Added back |
| Net income for tax | $12,000 | N/A |
| Net income for mortgage | N/A | $20,000 |
The add-back reflects that CCA is a tax deduction for the building’s wear, not a cash cost in the year. CCA can reduce your net rental income to zero but can't create or increase a rental loss.
Short-term rental (Airbnb) income
Lenders treat short-term rental income more cautiously than lease income, and policies differ by lender. A property used only for short-term rentals isn’t owner-occupied: High-ratio insurance, which allows less than 20% down, is only for a home that you, or a spouse, partner, parent or child living there rent-free, will occupy. It needs at least 20% down. Lender policies, disclosure and financing routes are covered in financing a short-term rental.
| Concern | Details |
|---|---|
| Income volatility | Short-term rental income fluctuates seasonally and with market conditions |
| Regulatory risk | Many large cities limit short-term rentals, often to the host’s principal residence (see Airbnb rules by city) |
| No lease security | Without a long-term lease, bookings can stop at any time |
| Insurance | A standard home policy may not cover short-term rental activity |
Documentation lenders ask for
| Document | Purpose | Where it comes from |
|---|---|---|
| Signed lease agreement | Shows the expected rent | Your tenant’s signed lease |
| Form T776 from recent returns | Rental income and expenses as reported to the CRA | Your tax returns |
| Notices of Assessment | Confirm the returns were filed and assessed | Your CRA account |
| Rental appraisal (if no lease) | Fair market rent estimate | A licensed appraiser |
| Bank statements | Show rent deposits being received | Your bank |
| Property tax bill | Confirms the tax amount | Your municipality |
| Insurance declaration | Confirms coverage for rental use | Your insurer |
A tax-return history of the rent, backed by signed leases and Notices of Assessment, is the most complete record. If you are buying a property to rent out, a signed lease is the most direct evidence, with a rental appraisal as the fallback.
Ways to strengthen a rental income application
| Strategy | How it helps |
|---|---|
| Sign a lease before applying | Concrete income proof instead of an estimate |
| Get a rental market appraisal | Supports the expected rent when there is no lease |
| Report all rental income on your tax returns | Lenders rely on the T776 history, so under-reported rent can’t be counted |
| Use a mortgage broker | Brokers can compare how different lenders count rent |
| Add a suite with an insured refinance | CMHC insures refinances to add a secondary suite, up to 90% of the as-improved value; the proposed secondary suite loan program was cancelled (see what replaced it) |
| Show a low-vacancy history | Demonstrates that the income is reliable |
Related Resources
Sources
The figures and rules on this page come from these sources, last checked against them between September 25, 2026 and October 1, 2026. How we check facts.
- Canada Guaranty: Rental Advantage - Canada Guaranty Mortgage Insurance Company
- Canada Revenue Agency: Rental Income
- CMHC: Calculating GDS / TDS
- CMHC: CMHC Refinance for Building Secondary Suites
- CMHC: Rental Income
- CMHC: CMHC Improvement
- CMHC: CMHC Purchase
- CMHC: Mortgage Loan Insurance for Standard Rental Housing
- Department of Finance Canada: Mortgage Insurance Rule Changes to Enable Homeowners to Add Secondary Suites
- Financial Consumer Agency of Canada: How much you need for a down payment