Affordability Calculator Ontario

This affordability calculator helps Ontario residents determine if a home purchase is within their budget. By entering your income, expenses, and desired home price, you can estimate your monthly mortgage payments and determine if you qualify for a mortgage.

How to Use This Calculator

To use the affordability calculator, follow these steps:

Enter your gross annual income before taxes.
Enter your total monthly expenses (including rent, utilities, food, etc.).
Enter the price of the home you're considering.
Select your down payment percentage (typically 5% to 20%).
Enter the interest rate (current average rates apply).
Select the amortization period (usually 25 or 30 years).
Click Calculate to see your results.

The calculator will show you:

Your monthly mortgage payment
Your total mortgage amount
Your affordability ratio (how much of your income goes to housing)

Formula Used

The affordability calculator uses the following formulas:

Monthly Mortgage Payment

P = L × (r(1 + r)^n) / ((1 + r)^n - 1)

Where:

P = Monthly payment
L = Loan amount (Home price - Down payment)
r = Monthly interest rate (Annual rate ÷ 12 ÷ 100)
n = Number of payments (Amortization period × 12)

Affordability Ratio

Ratio = (Monthly mortgage payment ÷ (Gross annual income ÷ 12)) × 100

Where:

Ratio = Percentage of income spent on housing
Monthly mortgage payment = From the first formula
Gross annual income = Your total annual income

Important Notes

This calculator provides estimates only. Actual mortgage approval depends on your credit score, employment history, and other factors. Always consult with a mortgage professional for final decisions.

Worked Example

Let's calculate the affordability for someone with:

Gross annual income: $80,000
Monthly expenses: $2,500
Home price: $400,000
Down payment: 10%
Interest rate: 5.25%
Amortization: 25 years

Step 1: Calculate Down Payment and Loan Amount

Down payment = $400,000 × 10% = $40,000

Loan amount = $400,000 - $40,000 = $360,000

Step 2: Calculate Monthly Mortgage Payment

Monthly interest rate = 5.25% ÷ 12 ÷ 100 = 0.004375

Number of payments = 25 × 12 = 300

Monthly payment = $360,000 × (0.004375(1 + 0.004375)^300) / ((1 + 0.004375)^300 - 1)

Monthly payment ≈ $1,923.45

Step 3: Calculate Affordability Ratio

Monthly income = $80,000 ÷ 12 ≈ $6,666.67

Affordability ratio = ($1,923.45 ÷ $6,666.67) × 100 ≈ 28.87%

Results

Monthly mortgage payment: $1,923.45

Total mortgage amount: $576,020.00

Affordability ratio: 28.87%

This means you would spend about 28.87% of your income on housing, which is generally considered affordable in Ontario.

Interpreting Results

When using the affordability calculator, consider these guidelines:

Affordability Ratios

Ratio	Affordability	Recommendation
Less than 28%	Very Affordable	You're likely to qualify for a mortgage with ease.
28% - 36%	Affordable	You may qualify with some conditions or higher down payment.
36% - 45%	Marginally Affordable	You may need to improve your credit score or find a cheaper home.
Over 45%	Not Affordable	You may struggle to qualify or need to reduce expenses.

Next Steps

If your affordability ratio is acceptable:

Check your credit score and improve it if needed
Save for a larger down payment to reduce monthly payments
Consider pre-approval to understand your borrowing power

If your affordability ratio is too high:

Consider renting instead of buying
Look for homes in less expensive areas
Increase your income through a side job or career change
Reduce your monthly expenses to free up more income

Frequently Asked Questions

What is a good affordability ratio in Ontario?

In Ontario, a good affordability ratio is typically less than 28-30% of your gross monthly income. This means your monthly mortgage payments should not exceed about 28-30% of what you earn each month.

Does this calculator consider property taxes and insurance?

No, this calculator focuses only on the mortgage payment. Property taxes and insurance are additional costs that you should factor in separately when budgeting for home ownership.

How accurate are the affordability calculations?

The calculator provides estimates based on standard mortgage formulas. Actual mortgage approval depends on your credit score, employment history, and other factors. Always consult with a mortgage professional for final decisions.

Can I use this calculator for condos or townhouses?

Yes, you can use this calculator for any type of property in Ontario. The formulas are the same regardless of the property type.

What if I have multiple income sources?

Add all your income sources together to get your total gross annual income before entering it into the calculator.