Portfolio Financing for Incorporated Landlords: Commercial Underwriting Past the 4-Door Threshold
Once an incorporated landlord's portfolio crosses the 4-unit threshold — or the borrowing entity is a corporation rather than an individual — most federally regulated financial institutions shift underwriting from residential B-20 guidelines to commercial credit adjudication. This triggers a fundamentally different documentation standard, a DSCR-based qualification model, and rate pricing that runs 50–150 bps above comparable residential terms. The path forward depends on portfolio size, corporate structure, and whether the lender is a Schedule I bank, credit union, or MIC.
Who this is for
Incorporated real estate investors holding 4+ rental doors inside a corporation or holdco structure, seeking to refinance, consolidate, or expand a portfolio under commercial lending terms.
- Gross annual rental income
- $148,800
- Net operating income (after 35% expense ratio)
- ~$96,700
- DSCR at 5.25% on $2.15M refinanced balance
- ~1.18× (minimum threshold is typically 1.20–1.25×)
- Commercial rate premium vs residential
- ~75–130 bps; indicative 5-yr fixed ~6.0–6.3%
- Maximum LTV (commercial, 5+ units residential)
- 75% per OSFI commercial guidelines; 65% at some Schedule I banks
Framework
The 4-door threshold and what triggers commercial underwriting
OSFI Guideline B-20 governs residential mortgage underwriting at federally regulated financial institutions (FRFIs) and applies to properties with 1–4 units. At 5+ units, or when the borrowing entity is a corporation rather than an individual, the file moves to commercial credit — a separate adjudication framework with no standardized stress-test floor, no CMHC insured product eligibility, and lender-specific underwriting criteria.
The trigger is dual: unit count and borrower entity type. A corporation borrowing against a single-family rental is already commercial at most Schedule I banks, regardless of unit count. Credit unions operating under provincial regulation (FSRA in Ontario, BCFSA in BC) may apply their own thresholds — some extend residential treatment to incorporated borrowers up to 4 units, others do not. Confirm the applicable regulator before assuming residential terms apply.
DSCR underwriting — the primary qualification metric
Commercial lenders qualify the property, not the borrower's personal income. The Debt Service Coverage Ratio (DSCR) is the central metric: Net Operating Income ÷ Annual Debt Service. Most Schedule I banks require a minimum 1.20–1.25× DSCR; some credit unions and MICs accept 1.10–1.15× with compensating factors.
NOI calculation matters: lenders apply a vacancy and expense load — typically 25–40% of gross rents depending on property type and market — before computing NOI. Actual operating costs are often lower, but lenders use standardized haircuts. Borrowers who present audited financials showing a lower expense ratio can sometimes negotiate the lender's assumed load downward, improving the qualifying NOI. Personal income is still reviewed for recourse guarantees but does not drive the approval.
Holdco and corporate structure documentation requirements
Commercial underwriting requires a materially different document package than residential B-20 files:
1. Corporate documents: Articles of incorporation, certificate of status, shareholder register, and any unanimous shareholder agreements (USAs) or co-ownership agreements.
2. Financial statements: Two to three years of T2 corporate returns and, for portfolios above ~$3M, audited or review-engagement financials prepared by a CPA. Internally prepared statements are typically rejected at Schedule I banks.
3. Rent rolls: Current signed leases or month-to-month tenancy agreements for all units, with rent amounts, term expiry, and tenant names. Lenders cross-reference rent roll income against T2 Schedule 125 rental income.
4. Personal net worth statement: Even in a non-recourse structure, most lenders require a personal financial statement from all shareholders holding >20% of the corporation.
5. Environmental: Phase I ESA may be required for mixed-use or older properties; lender-specific thresholds apply.
Rate and term structure in commercial residential lending
Commercial financing for residential rental portfolios (5+ units, or corporate borrower) is priced off the lender's commercial rate card, not the posted residential rate sheet. In the current environment (BoC overnight at 2.75%, 5-year GoC bond ~3.1–3.3%), indicative 5-year fixed commercial rates for well-structured portfolio files run 5.90–6.40% — a 75–130 bps premium over comparable residential investment property rates.
Term structures differ: 1-, 3-, and 5-year fixed terms are standard; 10-year terms are available from life-company lenders (Sun Life, Canada Life, Manulife) at competitive spreads for stabilized portfolios. Amortizations are typically capped at 25 years for commercial residential; some lenders allow 30 years for strong DSCR files. Open prepayment is rare — most commercial mortgages carry yield-maintenance or IRD penalties that are structurally more punitive than residential IRD.
Lender landscape — who actually does this
The market segments by portfolio size and structure:
Schedule I banks (TD, RBC, BMO, Scotiabank, CIBC, National Bank): Active in commercial residential above $1M. Require strong DSCR, audited financials at larger loan sizes, and full personal recourse guarantees. Pricing is competitive but approval timelines run 4–8 weeks.
Credit unions (Meridian, Alterna, First West, Servus): Often more flexible on corporate borrower treatment and DSCR thresholds. Provincial regulation means policies vary by province. Some extend residential-adjacent terms to incorporated borrowers with fewer than 5 units.
Alternative/B-lenders (Equitable Bank, Home Trust, Haventree): Accept thinner DSCR (1.10–1.15×) and less seasoned corporate structures. Rate premium of 100–200 bps over Schedule I. Useful for portfolios in lease-up or with recent corporate restructuring.
MICs and private lenders: Last resort for portfolios that cannot clear DSCR minimums. Rates 8–12%+, 1-year terms, 1–2% lender fees. Appropriate only as a bridge to stabilization.
Refinancing mechanics — LTV, equity extraction, and cross-collateralization
Commercial residential refinances are capped at 75% LTV under standard commercial guidelines; some Schedule I banks apply a 65% cap on corporate borrowers without a strong operating history. CMHC's multi-unit insured product (MLI Select) is available for purpose-built rental of 5+ units but does not apply to existing residential portfolio refinances held in a corporation.
Equity extraction through a corporate refinance has tax implications: funds pulled from the corporation as a shareholder loan or dividend are subject to corporate and personal tax treatment — coordinate with a tax advisor before structuring the draw. Cross-collateralization (pledging multiple properties under a single commercial mortgage) is common and can improve DSCR optics by pooling NOI, but creates concentration risk: a default on one property can trigger cross-default on the entire portfolio.
Key considerations
- A DSCR of 1.18× on a refinance that requires 1.20× minimum is not a rounding error — it is a decline. Before submitting, stress-test your NOI assumptions using the lender's vacancy load (not your actual vacancy), and confirm the qualifying rate the lender will use for debt service calculation, which may be the contract rate or a stressed rate depending on the institution.
- Personal guarantees are nearly universal in Canadian commercial residential lending, even for well-capitalized corporations. Negotiating a limited recourse or carve-out guarantee is possible at loan sizes above $5M with strong DSCR, but rare below that threshold.
- Corporate structure complexity — layered holdcos, multiple shareholders, or inter-company loans — materially extends underwriting timelines and may require a legal opinion on the corporate structure. Budget 6–10 weeks for a complex holdco file at a Schedule I bank.
- Provincial landlord-tenant legislation affects lender risk assessment. Ontario's Residential Tenancies Act vacancy decontrol rules and BC's rent increase caps are factored into lender vacancy and rent-growth assumptions — properties in rent-controlled markets may receive more conservative NOI treatment.
- If the portfolio includes any properties with outstanding work orders, property standards violations, or unresolved zoning non-conformities, resolve these before applying. Commercial lenders conduct title searches and municipal compliance checks that residential lenders often skip.
Common mistakes
- Submitting internally prepared financial statements to a Schedule I bank for a portfolio above $2M — the file will be returned for CPA-prepared statements, adding 4–8 weeks and potentially missing a rate-hold window.
- Assuming the residential stress-test rate (currently 5.25% or contract rate +2%, whichever is greater) applies to commercial underwriting — it does not. Commercial lenders set their own qualifying rate, which may be higher or lower depending on the institution and product, and failing to confirm this in advance produces inaccurate pre-qualification estimates.
- Structuring equity extraction as a shareholder loan without tax advice — the Income Tax Act's shareholder benefit rules (Section 15) can deem the loan a taxable benefit if not properly documented, creating a tax liability that exceeds the rate savings from the refinance.
- Cross-collateralizing all portfolio properties under a single lender without understanding the cross-default provisions — a vacancy spike on one property that triggers a covenant breach can put the entire portfolio in default, not just the underperforming asset.
- Ignoring yield-maintenance penalties when breaking a commercial mortgage mid-term — on a $2M commercial mortgage with 3 years remaining, a yield-maintenance penalty can reach $80,000–$150,000 depending on the rate differential, dwarfing the residential IRD equivalent.
Action steps
- 01Pull your current rent roll and calculate NOI using a 30–35% expense load — this is the number a commercial lender will start with, not your actual operating costs. If the resulting DSCR is below 1.20× at current rates, identify which properties are dragging the ratio before approaching lenders.
- 02Engage a CPA to prepare or update your corporate T2 returns and financial statements before initiating any lender conversations — most Schedule I banks will not issue a term sheet without at least two years of CPA-prepared financials.
- 03Map your corporate structure on paper: identify all shareholders above 20%, any inter-company loans, and any properties held outside the primary borrowing entity. This is the first thing a commercial underwriter will ask for, and gaps here cause delays.
- 04Contact a commercial mortgage broker with demonstrated portfolio lending experience — not a residential broker who occasionally does investment properties. The lender relationships, rate access, and underwriting knowledge are materially different.
- 05Request a rate hold in writing once you have a term sheet. Commercial rate holds are typically 30–60 days, shorter than residential, and the rate environment in 2025–2026 has shown enough volatility that an unprotected rate can move 25–40 bps during a long underwriting process.