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Cap rate calculator

Free calculator · Ontario investors

Cap rate calculator

Pick a property type, from a single family home to a 12-unit building, and see its net operating income and capitalization rate worked out line by line.

What kind of property?

Triplex

$1,000,000 purchase price

3 units @ $1,500/mo = $4,500

Expenses of $500/mo

Monthly net income = $4,000

Annual NOI = $48,000

Cap rate

what is the return on my investment?

$1,000,000 invested

earning $48,000 per year

$48,000 ÷ $1,000,000 = 4.8%

Cap Rate = 4.8%

Cap rate

4.8%

4–6%

Typical for Ontario duplexes to small apartment buildings.

Price / unit

$333,333

GIM

18.5

Expense ratio

11%

Cap rate leaves out the mortgage. See the cash flow with financing

Triplex numbers

Three units under one roof. Starting values are typical for Ontario; change any of them.

= $333,333 per unit

/mo

= $4,500/mo total

Operating expenses

/month

Taxes, insurance, repairs and any utilities you pay. Not the mortgage.

Empty months and unpaid rent; many investors use 3–5%

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What is cap rate?

The capitalization rate is the yearly return a property would earn if you bought it with cash. It answers one question: what is the return on my investment?

Cap rate = net operating income ÷ purchase price

  • $1,000,000 triplex, 3 units at $1,500/month = $4,500/month
  • Expenses of $500/month
  • Net income $4,000/month, so NOI = $48,000/year
  • $48,000 ÷ $1,000,000 = 4.8% cap rate

Cap rate by property type in Ontario

The calculator’s starting values for each type. They are typical examples, not market data: rents, taxes and prices vary a lot between Toronto, Ottawa, Kitchener and smaller towns.

Property typeUnitsPriceRent/monthNOI/yearCap rate
Single family1$750,000$3,000$25,8003.44%
Townhouse1$650,000$2,800$24,6003.78%
Duplex2$850,000$4,000$40,2004.73%
House + ADU2$950,000$4,200$41,4004.36%
Triplex3$1,000,000$4,500$48,0004.8%
Fourplex4$1,250,000$6,800$64,8005.18%
6-plex6$1,650,000$9,600$86,4005.24%
8 units8$2,000,000$12,400$110,4005.52%
12 units12$2,900,000$18,000$156,0005.38%

Cap rate, cash flow and cash-on-cash

  • Cap rate compares buildings. It ignores financing, so a cash buyer and a buyer with 20% down see the same number.
  • Cash flow is NOI minus your mortgage payments: the money that actually lands in your account each month.
  • Cash-on-cash return is cash flow divided by the cash you put in, so it changes with your down payment and rate.

If the cap rate is lower than your mortgage rate, borrowing reduces your return and the property will usually need a bigger down payment to cash flow. Check cash flow with a mortgage.

Ontario rules that affect cap rate

  • 1–4 units vs 5+ units. Up to four units is residential: CMHC-insured financing and value set mostly by comparable sales. Five units and up is commercial: lenders and appraisers value it on NOI and cap rate.
  • Additional units (ADUs). Most serviced residential lots in Ontario can have up to three units, such as a basement apartment and a garden or laneway suite, subject to local zoning and the Building Code.
  • Rent control. Units first occupied before November 15, 2018 can only rise by the yearly guideline (2.1% for 2026), so below-market rents in older buildings take time to catch up. Newer units are exempt from the guideline.
  • Property tax. Buildings with seven or more units fall into the multi-residential tax class, which some municipalities tax at a higher rate than houses. Use the actual tax bill rather than an estimate.

Frequently asked questions

Sources

Estimates only, not financial, tax or legal advice. Rules last reviewed October 5, 2026.

Looking at a multiplex?

Get a second set of eyes on the numbers

Rent rolls, expense estimates and tenant situations are where most cap rates go wrong. Send us the address and we’ll tell you what we see, from someone who looks at Ontario income properties every week.

The PrivateDeals team

Based in Cambridge, working across Ontario

Prefer to write it out? Send a message

Cap Rate Calculator Ontario: Duplex, Triplex, Fourplex & More | Private Deals