Cap rate vs cash-on-cash return — which one matters?

The fundamental question each metric answers

Cap rate answers: “If I bought this property all-cash, what return would the operating cash flows alone produce?”

Cash-on-cash answers: “Given the leverage I’m actually using, what return am I getting on the cash I’m putting in?”

These are different questions. Both are useful. Neither alone is sufficient.

Cap rate — the property-level metric

Cap rate (capitalization rate) is the unlevered yield on a property:

Cap rate = Net Operating Income (NOI) ÷ Purchase Price

Net Operating Income is the annual income after operating expenses but before mortgage payments and income tax:

• Gross rents
• − Vacancy allowance (3-8% in Canadian markets)
• − Property tax
• − Insurance
• − Property management (8-12% of rents if outsourced)
• − Repairs and maintenance (1% of property value annually as a budget)
• − Utilities (if landlord-paid)
• − Condo fees (for stratified units)
• = NOI

Cap rate ignores financing entirely — it measures the property as a business, not your specific deal.

Worked example

$1,000,000 detached rental, Toronto suburb:

• Gross rents: $60,000/year
• Vacancy (5%): −$3,000
• Property tax: −$5,800
• Insurance: −$1,400
• Property management: −$5,400
• Repairs: −$10,000
• = NOI: $34,400
• Cap rate: $34,400 ÷ $1,000,000 = 3.44%

That’s typical for a single-family rental in the GTA — low cap rates reflect high property values and an investor expectation of appreciation rather than current cashflow.

Cash-on-cash — the investor-level metric

Cash-on-cash return reflects YOUR specific deal — your down payment, your mortgage rate, your closing costs:

Cash-on-cash = Annual Cash Flow Before Tax ÷ Total Cash Invested

Annual cash flow before tax is NOI minus mortgage debt service:

• NOI
• − Mortgage principal + interest
• = Pre-tax cash flow

Total cash invested:

• Down payment
• + Closing costs (legal, land transfer tax, etc.)
• + Any initial renovation or setup capital

Same example, levered

Same $1M Toronto rental, 25% down ($250,000), $750k mortgage at 5.0%, 25-year amortization:

• NOI: $34,400 (from above)
• Annual debt service: ~$52,500
• Pre-tax cash flow: −$18,100 (negative cashflow)
• Total cash invested: $250,000 down + ~$20,000 closing = $270,000
• Cash-on-cash: −$18,100 ÷ $270,000 = −6.7%

Negative cashflow on day one. The investor isn’t buying for current returns — they’re buying for principal paydown + appreciation.

A different example — secondary market

$420,000 detached rental in Hamilton:

• Gross rents: $38,000/year
• NOI after operating expenses: $26,400
• Cap rate: 6.3%
• 25% down ($105,000), $315k mortgage at 5.0%, 25-yr amort
• Annual debt service: ~$22,050
• Pre-tax cash flow: $4,350
• Total cash invested: $115,000
• Cash-on-cash: 3.8%

Positive cashflow at decent leverage. This is the math secondary-market Canadian rental investors live with.

When cap rate is the right metric

Use cap rate when:

• Comparing properties of different sizes or types in the same market
• Comparing markets (a 4% Toronto cap vs 7% Saskatoon cap reflects market-level expectations about appreciation and risk)
• Underwriting commercial / multi-unit deals where the lender uses cap rate to value the property and set the DSCR
• Pricing on resale — net selling proceeds will reflect the cap rate buyers will pay
• MIC and lender valuation analysis — see MIC vs REIT

When cash-on-cash is the right metric

Use cash-on-cash when:

• Deciding whether to deploy YOUR capital to this specific deal
• Comparing rental investing to other uses of the same down payment (TFSA / FHSA / non-registered investing)
• Stress-testing leverage — what happens to cash-on-cash if rates rise or rents drop
• Sizing your portfolio — how much cash do you need to cash-flow at break-even

What both metrics ignore

Both cap rate and cash-on-cash are point-in-time snapshots. They ignore:

• Principal paydown — every monthly payment converts mortgage debt into your equity. This is often 30-40% of total long-run returns.
• Appreciation — long-run Canadian residential 4-7%/year. For leveraged investors, even modest appreciation produces dramatic equity returns.
• CapEx reserves — roof every 25 years, furnace every 15 years, plumbing eventually. Budget 0.5-1% of property value annually.
• Tenant risk — vacancy, damage, rent arrears, slow eviction (Canadian provinces vary widely)
• Regulation risk — rent control changes, vacancy taxes, foreign-buyer rules
• Liquidity — real estate sells over 90+ days at 5-7% transaction cost

This is why “just use cap rate” or “just use cash-on-cash” is incomplete. Both go into a 5-year IRR (Internal Rate of Return) projection that accounts for all of the above.

The 5-year IRR projection — what real investors actually use

For a complete picture, model a 5-year IRR with:

• Initial cash out: down payment + closing + renovations
• Annual cash flow each year (including rent growth, expense growth)
• Year 5 sale proceeds: projected price − selling costs − remaining mortgage balance − capital gains tax

Run rental cashflow calculator for the year-by-year cashflow, then project sale at expected appreciation rate.

A typical Canadian rental in a balanced market: 3% cap, −5% cash-on-cash, and an 11-14% IRR over 5 years driven by principal paydown + 4-5% annual appreciation. The IRR makes the negative cashflow tolerable.

Common mistakes when using these metrics

• Comparing cap rates across different expense bases — one broker excludes property management, another includes it. NOI definitions vary.
• Using gross rent instead of NOI — gross yield (rent/price) is NOT cap rate. See rental yield.
• Ignoring capex reserves — a cap rate that doesn’t set aside for major capital items overstates returns
• Confusing cash-on-cash with total return — cash-on-cash misses appreciation and paydown, which are usually larger than cashflow
• Anchoring on US benchmarks — US 1% rule and 8-10% cash-on-cash targets don’t fit most Canadian markets

What to do next

1. Calculate cap rate for properties you’re considering — see cap rate / ROI calculator
2. Layer in your specific financing scenario for cash-on-cash
3. Project the 5-year IRR including expected appreciation
4. Compare against your alternative uses of the same capital (FHSA, equity portfolio, paying down primary mortgage)
5. Decide based on the IRR + tenant/regulation risk profile, not on any single yield number

Cap rate and cash-on-cash are tools. They tell you different things. Most experienced Canadian rental investors check both — and don’t make decisions on either one alone.