Understanding Your Multiplex ROI
A practical breakdown of how to calculate return on investment for multiplex properties, including cash flow analysis, cap rates, and total return metrics.
By Michael Torres · March 24, 2026
Understanding Your Multiplex ROI
Calculating the return on investment for a multiplex property involves more than just comparing purchase price to rental income. A thorough ROI analysis considers cash flow, appreciation, equity build-up, and tax advantages. Here's how to evaluate any multiplex opportunity like a professional investor.
The Four Pillars of Real Estate Return
1. Cash Flow
The most immediate form of return -- the money left after all expenses are paid.
Monthly Cash Flow = Gross Rent - (Mortgage + Taxes + Insurance + Maintenance + Management + Vacancy)
For a typical BC multiplex:
- Gross rent (4 units at $2,400): $9,600/month
- Total expenses: $7,800/month
- Net cash flow: $1,800/month or $21,600/year
2. Appreciation
Property values in Metro Vancouver have averaged 5-7% annual appreciation over the past decade. On a $1.2M property, that translates to $60,000-$84,000 in annual value growth.
3. Mortgage Principal Paydown
Each mortgage payment includes a principal portion that builds your equity. In the first year of a $960,000 mortgage at 5%, approximately $18,000 goes to principal reduction.
4. Tax Benefits
Depreciation (Capital Cost Allowance), mortgage interest deductions, and other write-offs can significantly reduce your taxable rental income.
Key Metrics Every Investor Should Know
Cash-on-Cash Return
The ratio of annual pre-tax cash flow to total cash invested.
`` Cash-on-Cash = Annual Net Cash Flow / Total Cash Invested Example: $21,600 / $260,000 = 8.3% ``
Capitalization Rate (Cap Rate)
The ratio of net operating income to property value, measured before financing costs.
`` Cap Rate = Net Operating Income / Property Value Example: $52,800 / $1,200,000 = 4.4% ``
A cap rate of 4-5% is typical for well-located multiplex properties in Metro Vancouver. Higher cap rates (5-7%) can be found in Surrey, Langley, and other suburban markets.
Gross Rent Multiplier (GRM)
A quick screening tool to compare properties.
`` GRM = Property Price / Annual Gross Rent Example: $1,200,000 / $115,200 = 10.4 ``
Lower GRM generally indicates better value. For BC multiplexes, GRMs between 10-15 are common.
Building Your Pro Forma
A professional pro forma should include:
- Revenue projections: Current rents, market rents, vacancy assumption (5%), annual rent growth (3%)
- Operating expenses: Property tax, insurance, maintenance, management, utilities (if included)
- Financing details: Mortgage amount, rate, term, amortization
- Capital expenditures: Roof, mechanical systems, common area upgrades
- Exit strategy: Projected sale price, disposition costs
Common Mistakes to Avoid
- Underestimating vacancy: Always budget at least 5% vacancy, even in hot markets
- Ignoring maintenance reserves: Budget 1-2% of property value annually
- Overlooking closing costs: Legal fees, property transfer tax, and inspection costs add up
- Assuming constant appreciation: Build your base case without appreciation; treat it as a bonus
- Forgetting about capital expenditures: Major repairs can significantly impact annual returns
Real-World Example
Property: 6-unit multiplex in Burnaby near SkyTrain
| Metric | Value | |---|---| | Purchase price | $1,450,000 | | Down payment (25%) | $362,500 | | Closing costs | $42,000 | | Total cash invested | $404,500 | | Annual gross rent | $158,400 | | Annual net operating income | $98,200 | | Annual cash flow (after debt) | $28,400 | | Cash-on-cash return | 7.0% | | Cap rate | 6.8% | | Total return (incl. appreciation + paydown) | 18.5% |
This example demonstrates why multiplex investing can be so powerful -- the combination of cash flow, appreciation, and principal paydown creates attractive total returns.
Next Steps
Ready to run the numbers on a specific property? Contact our team for a personalized investment analysis, or browse our current projects to see what's available across BC.