How Mortgage Payments Work in Arizona
A standard mortgage payment in Arizona is calculated using the amortization formula:M = P[r(1+r)^n] / [(1+r)^n - 1]
Where P is the loan principal, r is the monthly interest rate (annual rate ÷ 12), and n is the number of monthly payments. On a $420K home in Arizona with a 10% down payment at 6.78% over 30 years, your principal and interest payment comes to approximately $2,459/month— not including property taxes or homeowner's insurance.
Arizona's property tax rate of 0.62% adds roughly $217/month to your total housing cost on a $420K home. This rate is below the national average of ~1.1%, which helps keep total housing costs lower.
Arizona vs. National Average
| Metric | Arizona | National Avg |
|---|---|---|
| Median Home Price | $420,000 | $420,000 |
| Property Tax Rate | 0.62% | 1.07% |
| Avg Mortgage Rate | 6.78% | 6.85% |
| Cost of Living Index | 104 | 100 |