Conventional Loan
Conventional Loan Monthly Payment Example for Montana Buyers
Reviewed by the HomeMath editorial team Updated 2026-08-06
Key takeaways
- A rough monthly payment for a $300,000 conventional loan at a 6% rate over 30 years is about $1,800, including principal, interest, taxes, insurance, and PMI.
- Montana property taxes average roughly 0.8% of a home's assessed value, adding around $200 per month for a $300,000 home.
- Montana’s first‑time‑buyer assistance programs can help lower the down payment, which reduces the loan balance and monthly payment.
When a Montana buyer chooses a conventional loan, the monthly payment is built from several components: principal and interest (P&I), property taxes, homeowner’s insurance, and, if the down payment is under 20%, private mortgage insurance (PMI).
How the payment is calculated
The P&I portion comes from the loan amount, interest rate, and loan term. For illustration, assume a 30‑year fixed‑rate loan at a 6% interest rate on a $300,000 mortgage. Using the standard amortization formula, the P&I would be roughly $1,800 per month.
Montana‑specific costs
- Property taxes: Montana’s average tax rate is about 0.8% of the assessed value. On a $300,000 home, that works out to roughly $200 per month, though the exact amount varies by county.
- Homeowner’s insurance: Premiums depend on location, coverage limits, and the home’s age. A typical range for Montana homes is $70‑$120 per month.
- Private mortgage insurance (PMI): If the down payment is less than 20%, lenders usually require PMI, which can add 0.3%‑0.6% of the loan amount per year. For a $300,000 loan, that translates to about $75‑$150 per month.
Putting it together
Adding the example figures gives a total monthly payment in the neighborhood of $1,800 (P&I) + $200 (taxes) + $100 (insurance) + $100 (PMI) ≈ $2,200. The exact number will shift based on the actual interest rate, down payment, tax assessment, and insurance quotes.
Montana also offers a state‑run first‑time‑buyer assistance program that can provide down‑payment grants or low‑interest loans. Using that assistance can lower the loan balance, which in turn reduces the P&I and possibly eliminates the need for PMI.
This article provides general information and does not constitute personalized financial advice. Consult a mortgage professional or financial advisor for details specific to your situation.
FAQ
How does a conventional loan differ from an FHA loan?
Conventional loans are private‑sector mortgages that typically require a higher credit score and a larger down payment than FHA loans. FHA loans are government‑backed, allow lower down payments, and have more flexible credit requirements, but they always require mortgage insurance premiums.
What is private mortgage insurance (PMI) and when is it required?
PMI protects the lender if the borrower defaults. It is usually required when the down payment is less than 20% of the home’s purchase price on a conventional loan. Once the loan balance drops below 80% of the home’s value, the borrower can request cancellation.
Can I combine Montana’s first‑time‑buyer assistance with a conventional loan?
Yes. Many of Montana’s assistance programs are designed to work with conventional financing, offering down‑payment grants or low‑interest second‑mortgage loans that reduce the primary loan amount.
How are property taxes assessed in Montana?
Montana counties assess property taxes based on the market value of the land and improvements, using a tax rate set by local governments. The assessed value is typically updated every few years, and the tax bill is paid annually or semi‑annually.
What factors can change my monthly payment after closing?
Changes in property tax rates, homeowner’s insurance premiums, and the removal of PMI (if you reach 20% equity) can all affect the monthly payment. Additionally, if you have an adjustable‑rate mortgage, the interest rate itself can change over time.
Estimate your monthly payment →