Home Buying Costs Calculator

Most online tools (yes, including the big lender ones) show a payment based on price, rate, and amortization. That’s a start, but it’s not what you’ll actually pay every month once you own the place. A few things this one does that most don’t:

It factors in your actual home expenses, not just the mortgage. Property tax, strata fees, utilities, and anything else recurring – you enter them once, and they get added straight into your monthly total. If you’re comparing a condo with $450/month strata against a townhouse with $150/month strata, this is where that difference actually shows up.

It handles rental income properly, not as an afterthought. If you’re buying with a rental suite or plan to rent out part of the property, enter your expected monthly rent, and it’ll net it against your total monthly cost. If the rent covers more than your carrying costs, it shows the surplus instead of a confusing negative number. This is the calculation most buyers want when weighing a mortgage helper suite: does it pay for itself, and by how much?

It calculates mortgage insurance the way CMHC actually prices it. Down payment under 20%? The premium isn’t a flat number – it’s tiered based on your loan-to-value ratio, and it changes again if you’re taking a 30-year amortization on an insured mortgage. This calculator applies both, including the extra 0.20% surcharge that comes with the 30-year option when you qualify for it as a first-time buyer or new-build purchaser. Most public calculators skip this entirely and just show you a plain 25-year number.

It uses real Canadian mortgage math. Canadian mortgages compound semi-annually by law – that’s different from the simple monthly compounding you’ll see in a lot of generic (often American-built) mortgage calculators. The payment you see here reflects the actual rate you’d be quoted by a Canadian lender, not an approximation.

You can enter your down payment either way. Dollar amount or percentage – whichever you’re thinking in. If you flip between the two, the numbers stay in sync.

• The home price you’re considering
• Your planned down payment (dollar amount or percentage, your choice)
• Whether you’re a first-time buyer or buying new construction (this affects your amortization options and mortgage insurance rules)
• Your expected interest rate and term
• Rough monthly numbers for property tax, strata (if applicable), and utilities
• If relevant, what you expect to collect in rent

You don’t need exact figures for everything. Property tax and strata are usually listed on the MLS listing; utilities can be a rough estimate based on the home’s size and age.

Mortgage Amount – What you’re actually borrowing, including any mortgage insurance premium rolled into the loan (it isn’t paid out of pocket; it’s financed).

Monthly Mortgage – Your principal and interest payment, calculated using semi-annual compounding.

Monthly Expenses – Property tax, strata, utilities, and anything else you’ve added, totalled.

Total Monthly Cost – Mortgage plus expenses. This is the number that actually matters when you’re deciding what you can afford.

If you’re factoring in rental income, you’ll also see either your Net Monthly Cost After Rent (what you’re still paying out of pocket once rent comes in) or a Monthly Rental Surplus if the rent covers more than your total cost.

If you’re a first-time buyer or purchasing a newly built home, you may be eligible for a 30-year amortization on an insured mortgage – that’s only available if your down payment is under 20% and the home is priced under $1.5 million. This can also affect your Property Transfer Tax exemption, which this calculator doesn’t cover directly.

If you haven’t already, check your PTT exemption on our BC Property Transfer Tax Calculator.