PMI Calculator
Calculate your private mortgage insurance (PMI) cost and determine when you can cancel it. Input your home value, down payment amount, annual PMI rate, mortgage interest rate and loan term to see your monthly and annual PMI cost, total PMI paid over the life of the loan, and the month when you can request PMI cancellation (at 80% LTV) and when it automatically cancels (at 78% LTV based on the original amortization schedule). The calculator follows the Homeowners Protection Act (12 U.S.C. 4901) and shows you exactly when PMI obligations end. Understand the full cost of a down payment below 20% and see how extra principal payments affect your PMI cancellation date. Perfect for evaluating whether putting down more to avoid PMI makes financial sense compared to paying PMI for several years.
On a $400,000 home with $40,000 down (90.0% LTV), at 0.85% annual PMI rate, monthly PMI is --. PMI can be requested for cancellation in approximately --.
How PMI cost and cancellation are calculated
Monthly PMI is computed as a percentage of the outstanding loan balance. Lenders typically quote an annual rate, which is divided by 12 for the monthly premium. The CFPB PMI guide explains your cancellation rights under the Homeowners Protection Act.
LTV = loan / home value x 100
monthly PMI = loan x (annualPmiRate / 100) / 12
monthly P+I = loan x r x (1+r)^n / ((1+r)^n - 1) where r = rate/100/12, n = term x 12
cancellation month: first month where scheduled balance < 0.80 x original home value
Worked example
$400,000 home, $40,000 down (10%), 0.85% PMI rate, 6.5% mortgage rate, 30-year term:
- Loan amount = $400,000 - $40,000 = $360,000
- LTV = $360,000 / $400,000 = 90.0%
- Monthly PMI = $360,000 x 0.0085 / 12 = $255.00
- Monthly P+I = $360,000 x 0.005417 x (1.005417)^360 / ((1.005417)^360 - 1) = $2,275.58
- 80% LTV threshold = $400,000 x 0.80 = $320,000. Reached around month 99 (year 9).
Your rights under the Homeowners Protection Act
The Homeowners Protection Act of 1998 (12 U.S.C. 4901), which became effective in 1999, gives borrowers on conventional mortgages two key rights:
- Borrower-requested cancellation: You may submit a written request for PMI cancellation when the loan-to-value ratio based on the original purchase price and the original amortization schedule reaches 80%. Your lender must respond within 30 days. You must be current on payments and have a good payment history (no payments 60 or more days late in the prior 24 months).
- Automatic termination: The servicer must automatically terminate PMI on the date the scheduled balance first reaches 78% of the original purchase price, provided you are current on payments. No action on your part is required for automatic termination.
This calculator shows the month for each threshold based on the standard amortization schedule. If you make extra principal payments, you may reach the thresholds sooner. Contact your servicer to confirm the process for requesting early cancellation after additional payments.
Note: the Homeowners Protection Act applies to conventional loans closed on or after 29 July 1999. FHA and VA loans follow separate rules; FHA loans use mortgage insurance premium (MIP), which has different cancellation rules.
PMI calculator: frequently asked questions
What is PMI and why is it required?
Private mortgage insurance (PMI) is an insurance policy that protects the mortgage lender if the borrower defaults. Lenders typically require it when the borrower's down payment is less than 20% of the home's purchase price, because the loan-to-value ratio is higher and therefore riskier for the lender. PMI protects the lender, not the borrower. The premium is paid by the borrower, usually added to the monthly mortgage payment.
When can I remove PMI from my loan?
Under the Homeowners Protection Act (12 U.S.C. 4901), you have the right to request PMI cancellation in writing when the loan-to-value ratio (based on the original purchase price and original amortization schedule) reaches 80%. Your lender must also automatically terminate PMI when the scheduled balance reaches 78% of the original purchase price, provided you are current on payments. You may be able to request early cancellation if the home has appreciated significantly, but the lender may require a new appraisal.
Can I avoid PMI without a 20% down payment?
Yes, there are a few strategies. One is a piggyback loan (sometimes called an 80-10-10), where you take a first mortgage for 80% of the value, a second mortgage (home equity loan or HELOC) for 10%, and make a 10% down payment. Another is lender-paid PMI, where the lender pays the premium in exchange for a higher interest rate on the loan. A third option is some specialty loan programs (VA loans, for example) that do not require PMI at all.
How does FHA mortgage insurance differ from conventional PMI?
FHA loans require mortgage insurance premium (MIP), not conventional PMI. FHA MIP has two components: an upfront premium of 1.75% of the loan amount (usually rolled into the loan) and an annual premium ranging from 0.15% to 0.75% depending on the loan term, amount, and LTV. Unlike conventional PMI, FHA MIP on loans with less than 10% down cannot be cancelled for the life of the loan (as of recent HUD rules). Conventional PMI is typically cheaper and cancellable once you reach 80% LTV.
What PMI rate should I use?
PMI rates vary from roughly 0.2% to 2.0% of the loan amount per year, depending on the loan-to-value ratio, your credit score, the loan type, and the insurer. The default 0.85% in this calculator is a common mid-range estimate for a borrower with good credit and around 10% down. Your actual rate will be quoted by your lender or PMI provider before closing. The CFPB recommends asking lenders to disclose the PMI rate alongside the loan estimate.
Does PMI cancellation happen automatically?
Automatic cancellation is required by the Homeowners Protection Act at 78% LTV based on the original scheduled amortization (not early payoff). However, you can request cancellation earlier at 80% LTV by submitting a written request to your servicer, provided you have a good payment history and no junior liens. Servicers must respond to cancellation requests within 30 days. Check with your loan servicer for their exact process.
Official sources
- PMI cancellation rights: CFPB, When can I remove PMI from my loan?
- Homeowners Protection Act: 12 U.S.C. Chapter 49, US Government Publishing Office.
Reviewed by the CalculatorHub team, edited by James Graham, 12 June 2026. See our methodology. General information only, not financial advice.