How Mortgage Payments Work in Montana
A standard mortgage payment in Montana 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 $430K home in Montana with a 10% down payment at 6.89% over 30 years, your principal and interest payment comes to approximately $2,546/month— not including property taxes or homeowner's insurance.
Montana's property tax rate of 0.84% adds roughly $301/month to your total housing cost on a $430K home. This rate is near the national average of ~1.1%.
Montana vs. National Average
| Metric | Montana | National Avg |
|---|---|---|
| Median Home Price | $430,000 | $420,000 |
| Property Tax Rate | 0.84% | 1.07% |
| Avg Mortgage Rate | 6.89% | 6.85% |
| Cost of Living Index | 101 | 100 |