How private mortgage insurance works on conventional loans
Private mortgage insurance (PMI) is an insurance policy that protects the mortgage lender if a borrower defaults on a conventional loan. When purchasing a residential property with a conventional mortgage and putting down less than 20% of the purchase price, lenders standardly require borrower-paid PMI.
The annual cost of PMI typically ranges between 0.3% and 1.5% of the total loan amount, depending on your credit score, down payment percentage, and loan type. This annual premium is divided into 12 equal installments and added directly to your monthly mortgage payment alongside principal, interest, taxes, and homeowners insurance.
Under the federal Homeowners Protection Act of 1998 (12 U.S.C. 4901), borrowers have the statutory right to request written cancellation of PMI once their scheduled principal balance drops to 80% of the original home value. Furthermore, lenders are required by law to automatically terminate borrower-paid PMI once the principal balance reaches 78% of the original purchase value, provided mortgage payments are current.
Worked example: Purchasing a $400,000 home with 10% down
Consider a homebuyer in the United States purchasing a property for $400,000 with a 10% cash down payment ($40,000) financed with a 30-year fixed conventional mortgage at a 6.75% interest rate and an annual PMI rate of 0.60%.
The initial mortgage loan amount is $360,000.00, resulting in a loan-to-value ratio (LTV) of 90.0%. Because the LTV exceeds 80%, PMI is required.
At an annual PMI premium rate of 0.60%, the annual PMI cost is $2,160.00, resulting in a monthly PMI premium of $180.00.
Monthly principal and interest (P&I) equals $2,334.95, bringing the total monthly mortgage payment to $2,514.95 before property taxes and hazard insurance.
Under the Homeowners Protection Act, the borrower can request cancellation of PMI once the mortgage balance reaches $320,000.00 (80% of original value), and the lender must automatically cancel coverage at $312,000.00 (78% of original value).
Following the standard 30-year amortisation schedule, reaching the 80% LTV threshold takes 98 months of payments, during which the borrower pays an estimated total PMI paid of $17,640.00.
Ways to reduce or eliminate PMI on conventional loans
The simplest way to avoid private mortgage insurance entirely is to provide a 20% down payment at closing. However, if putting down 20% is not feasible, there are multiple strategies to minimize PMI costs.
Improving your credit score prior to loan application can substantially lower your PMI premium rate, as insurers price risk based on FICO scores. Additionally, making accelerated principal overpayments will reduce your loan balance faster, enabling you to reach the 80% cancellation threshold years ahead of schedule.
Inputs for the Calculate pmi on conventional loan calculator
Home purchase price
The contract purchase price or appraised value of the home.
Down payment
Your upfront cash down payment. If down payment is under 20%, private mortgage insurance (PMI) is required.
Annual PMI rate
The annual private mortgage insurance rate quoted by your lender (typically between 0.3% and 1.5%), charged when down payment is under 20%.
Mortgage interest rate
The annual fixed interest rate for your conventional home loan.
Loan term
The duration of your conventional mortgage in years (usually 30 or 15 years).
CALCULATOR QUESTIONS
PMI calculator for conventional loans questions
How much does PMI cost per month on a conventional loan?
PMI typically costs between 0.3% and 1.5% of the original loan balance per year. For example, on a $360,000 mortgage with a 0.60% PMI rate, the annual premium is $2,160, which works out to $180 per month.
When can I legally cancel PMI on a conventional mortgage?
Under the federal Homeowners Protection Act of 1998, you can submit a written request to cancel PMI once your mortgage principal balance reaches 80% of the property's original purchase price or appraised value. Your mortgage servicer must automatically terminate PMI once your scheduled balance reaches 78% of the original value, provided you are current on payments.
Can I remove PMI early if my home value increased?
Yes. Most conventional mortgage servicers (following Fannie Mae and Freddie Mac guidelines) allow borrowers to request early PMI cancellation based on current market value if the home has accumulated substantial equity due to appreciation or substantial home improvements, typically requiring a new appraisal.
Does PMI protect the homebuyer or the lender?
PMI protects the mortgage lender against financial loss if the borrower defaults on the loan and the property goes into foreclosure. Even though the borrower pays the monthly premium, the policy covers the lender.