Oshawa mortgage calculator
What a Oshawa mortgage costs each payment, how long it runs, what it costs in total, and how much sooner it ends if you pay a little more. Built on semi-annual compounding and a 25-year amortization, with the CMHC premium a low down payment triggers and the Ontario sales tax on that premium most calculators forget.
The purchase
20.0% down. The minimum on this price is $46,140.
Lenders qualify you at the higher of this rate plus 2 points and 5.25%: 6.34% here, a payment of $3,757.07.
The contract length, not the amortization. At the end of it you renew at whatever rates are then available.
Paying it down faster
Most lenders cap annual prepayments at 10–20% of the original principal, and charge a penalty above it. Check your own commitment before planning around a large lump sum.
Where the money goes, year by year
Early payments are almost all interest. The crossover (the year principal finally exceeds interest) is the real shape of an amortized loan, and it is much later than most people expect.
Show the first two years of the schedule
| Payment | Amount | Interest | Principal |
|---|---|---|---|
| 1 | $3,099.50 | $2,039.95 | $1,059.55 |
| 2 | $3,099.50 | $2,036.15 | $1,063.35 |
| 3 | $3,099.50 | $2,032.34 | $1,067.16 |
| 4 | $3,099.50 | $2,028.52 | $1,070.98 |
| 5 | $3,099.50 | $2,024.68 | $1,074.82 |
| 6 | $3,099.50 | $2,020.82 | $1,078.68 |
| 7 | $3,099.50 | $2,016.96 | $1,082.54 |
| 8 | $3,099.50 | $2,013.08 | $1,086.42 |
| 9 | $3,099.50 | $2,009.18 | $1,090.32 |
| 10 | $3,099.50 | $2,005.27 | $1,094.23 |
| 11 | $3,099.50 | $2,001.35 | $1,098.15 |
| 12 | $3,099.50 | $1,997.42 | $1,102.08 |
| 13 | $3,099.50 | $1,993.47 | $1,106.03 |
| 14 | $3,099.50 | $1,989.50 | $1,110.00 |
| 15 | $3,099.50 | $1,985.52 | $1,113.98 |
| 16 | $3,099.50 | $1,981.53 | $1,117.97 |
| 17 | $3,099.50 | $1,977.52 | $1,121.98 |
| 18 | $3,099.50 | $1,973.50 | $1,126.00 |
| 19 | $3,099.50 | $1,969.47 | $1,130.03 |
| 20 | $3,099.50 | $1,965.41 | $1,134.09 |
| 21 | $3,099.50 | $1,961.35 | $1,138.15 |
| 22 | $3,099.50 | $1,957.27 | $1,142.23 |
| 23 | $3,099.50 | $1,953.18 | $1,146.32 |
| 24 | $3,099.50 | $1,949.07 | $1,150.43 |
Derived from the figures above, not a lender's statement. A real schedule also depends on your closing date and the lender's rounding.
One land transfer tax here, two inside the city limits
Ontario charges a marginal land transfer tax on every purchase in the province, and on the $711,400 benchmark home in Oshawa that is $10,703, due in cash on closing day. The City of Toronto Act lets one municipality in Ontario charge a second tax on top of it, and Toronto does: below $2,000,000 its brackets are identical to the province's, so the same purchase inside the city limits would cost a further $10,703. Nowhere in this layer pays it. A first-time buyer claims up to $4,000 back from the province wherever they buy.
An insured mortgage is available at this price
Mortgage default insurance in Canada is available on a purchase price up to $1,500,000. The benchmark home in Oshawa is $711,400, under the cap, so a down payment below 20% is possible: 5% on the first $500,000 and 10% on the balance, or about $46,140.
The cap is on the price, not on the loan, so a purchase at $1,500,001 is uninsurable however much you put down. Where insurance applies, the premium is capitalized into the mortgage, but Ontario's 8% retail sales tax on that premium is not: it is payable in cash at closing, alongside the land transfer tax and the lawyer, and no lender will advance it.
Semi-annual compounding, and why the American number would be wrong
A Canadian fixed-rate mortgage compounds twice a year by law, not twelve times: the periodic rate is derived from the semi-annual equivalent rather than from the annual rate divided by twelve. That makes the same nominal rate slightly cheaper here than it would be in the United States. This site runs both conventions and no page borrows the other country's arithmetic. The Charlotte and Florida pages compound monthly over thirty years, and every Canadian page, this one included, does not.
The term is not the amortization, and renewal is the real risk
The 25 years above is the amortization; the rate is only fixed for the term, usually five years, after which the balance is renewed at whatever rates exist then. The calculator shows the balance at the end of the term for exactly that reason. An accelerated biweekly plan is twenty-six half-payments a year, which is thirteen monthly payments' worth of money rather than twelve, and it is the single most effective thing most borrowers can do, though it is nothing more than paying about 8% more each year.
What this cannot tell you
The payment above is principal and interest, plus the insurance premium where it applies. Your actual monthly cost also includes property tax: on a $711,400 home in Oshawa that is $390 a month, being 1.4317% charged against a 1 January 2016 value, which works out to about 0.66% of what the home is worth now. Add roughly $145 in home insurance, and a condominium fee if the property has one. For the full comparison against renting, and for the closing costs, use the rent versus buy calculator.
Sources
- Market Watch, July 2026: MLS® Home Price Index by municipality · Toronto Regional Real Estate Board · retrieved Supports: Composite, single-family detached and apartment benchmark prices for every municipality in this layer, July 2026, Year-over-year changes on each of those benchmarks, An All TRREB Areas composite benchmark of $934,600, down 4.63% year over year, A City of Toronto composite benchmark of $928,200, down 3.83%
- Market Watch, January 2016: MLS® Home Price Index by municipality · Toronto Regional Real Estate Board · retrieved Supports: Composite benchmark prices for every municipality in this layer at January 2016, the valuation date Ontario assessments are frozen to, A City of Toronto composite benchmark of $612,200 at that date, A Milton composite benchmark of $694,400, up 43.66% over the previous twelve months
- Financial Information Return 2024, Schedule 22: Municipal and School Board Taxation · Ontario Ministry of Municipal Affairs and Housing · retrieved Supports: Lower-tier, upper-tier, education and total residential tax rates for every municipality in Ontario, 2024, The residential assessment each rate is charged against and the taxes it raises, A uniform education rate of 0.153% across the province, The 2025 returns being incomplete at the time of retrieval, with seven of the twenty-four municipalities in this layer not yet filed
- Rental Market Survey: Toronto, average rent by bedroom type, October 2025 · Canada Mortgage and Housing Corporation · retrieved Supports: Toronto CMA average purpose-built rents of $1,761 one-bedroom, $2,045 two-bedroom and $2,294 three-bedroom-plus, A Toronto CMA purpose-built vacancy rate of 3.0%
- Census Profile, 2021 Census of Population · Statistics Canada · retrieved Supports: Population counts for every municipality in this layer at the 2021 census, East Gwillimbury's 44% growth between 2016 and 2021, the fastest of any municipality in Canada
- Assessment Act, R.S.O. 1990, c. A.31 · Government of Ontario · retrieved Supports: Property is assessed at current value, being the amount the land would realise on a sale, The valuation date is fixed by regulation, and the province has kept it at 1 January 2016 for every year since 2017
- Calculating Land Transfer Tax · Ontario Ministry of Finance · retrieved Supports: Provincial transfer tax brackets, The conditional 2.5% band
- Municipal Land Transfer Tax rates and fees · City of Toronto · retrieved Supports: Toronto municipal transfer tax brackets, First-time buyer rebate
- Residential rent increases · Government of Ontario · retrieved Supports: 2026 rent increase guideline of 2.1%, The 2018 occupancy exemption
- Retail Sales Tax · Government of Ontario · retrieved Supports: 8% retail sales tax on insurance premiums
These are estimates built from published figures, not a lender quote, a pre-approval or financial advice. Rates, premiums and provincial rules change; confirm anything you plan to act on with a mortgage professional and read the sourcing methodology.