How CMHC actually underwrites a multi-unit loan.
CMHC's multi-unit underwriting is fundamentally different from residential. Sizing is driven by property-level NOI against a minimum DCR — not by borrower income against a stress-tested rate. Loan-to-cost governs new construction, CMHC lending value governs existing property, and affordability thresholds (for MLI Select) are defined by 30% of median renter household income at the CMA level.
This section breaks down the four pillars of CMHC underwriting — DCR, LTV/lending value, affordability, and opex/reserves — into standalone pages with the math, thresholds, and gotchas that actually show up in deal submissions.
The underwriting stack — at a glance.
Each page below is a standalone deep-dive. Together they cover the full stack CMHC uses to size and price a multi-unit loan.
CMHC sizes loans on the lower of LTV and DCR. Minimum DCR (1.10–1.30) is set by segment, term length, and unit count. No residential-style stress test — contract rate (fixed) or ceiling rate (floating) is used directly.
New construction uses loan-to-cost. Existing property uses the lesser of purchase price or CMHC lending value (income + comparable sales + cost approach). Appraisals are mandatory on every application since November 2024.
Under MLI Select, qualifying rents are capped at 30% of median renter household income for the subject CMA — an income-based threshold, not a market-rent-based one. Published annually by CMHC in an XLSX attached to the MLI Select page.
CMHC does not publish universal opex assumptions. Underwriting uses three years of actual statements. Management fees 3–5% of EGI minimum, total opex 35–50% of EGI, vacancy from the Rental Market Survey, replacement reserves typically $250–500/unit/year.
Four principles behind the math.
If you take nothing else away from the pages below, take these.
Unlike residential mortgage underwriting, CMHC multi-unit approvals rest on the property's own NOI. Personal income, TDS and GDS ratios are not applied. Net worth (≥25% of loan amount, min. $100K) and management experience are confirmed, but the sizing math is property-income based.
The 4.79%/qualifying rate stress test that applies to residential mortgages does NOT apply to multi-unit. Fixed-rate loans use the contract rate; floating-rate loans use a lender-specified ceiling rate.
CMHC computes the loan that maxes out at the LTV/LTC cap and the loan that keeps DCR at the program minimum, and funds the lesser of the two. The DCR constraint most often binds in higher-cap-rate markets or on aggressive-amort MLI Select tier 3 deals.
Opex, vacancy, turnover, and management fees come from three years of audited or reviewed statements — no universal assumption is applied. New construction uses market comparables plus pro forma, adjusted by CMHC for plausibility.
Borrower covenant rules.
Beyond property-level cash flow, CMHC looks at the borrower: net worth, liquidity, experience, guarantee structure, and the legal entity holding title. These rules are applied consistently across MLI Standard and MLI Select, with a handful of Select-specific relaxations at higher tiers.
- · Net worth ≥25% of loan amount, minimum $100,000.
- · Liquidity: 10% of loan amount for construction; less strict for take-out financing on existing property.
- · Management experience: 5+ years multi-residential development or operations on a similar-scale project. Relaxed for non-profits and co-ops on MLI Select deals at 100+ points.
- · Purchase / refinance: 40% personal guarantee for the life of the loan.
- · Construction: 100% personal guarantee, stepping down to 40% at 12 months stable rents.
- · Limited recourse available at MLI Select Tier 3 (100 points) or at LTV under 65%.
- · Non-profit, co-op, Indigenous, and provincial borrowers may qualify for limited recourse earlier.
- · Limited partnership (LP) with corporate GP — most common for private investors.
- · Single-purpose corporation (SPV).
- · Bare trust / nominee structure.
- · Non-profit corporation, co-operative.
- · TIC and general partnership structures are disfavoured — full recourse to all partners.
Other covenants that apply to every MLI loan.
A handful of program-wide rules that sit outside the four-pillar sizing math but routinely bind real deals.
Commercial component must be ≤30% of gross floor area and ≤30% of lending value. Buildings exceeding both caps are ineligible for MLI programs.
The 2020 interim restrictions on insured-refinance proceeds were removed. Cash-out is once again unrestricted for qualified borrowers — reversing roughly four years of outdated guidance still circulating in market commentary.
The federal Prohibition on the Purchase of Residential Property by Non-Canadians Act applies. CMHC will not insure where the purchaser fails the eligibility test under the Act.
Any property under CMHC insurance cannot be stratified or converted to condominium ownership for the insurance term without CMHC consent and, typically, full premium repayment.