Success by JazE Edutech / Interactive Tool
Interactive Tool
Slide home price, down payment, and credit tier to see your monthly PMI premium, the total paid until PMI ends (78% LTV automatic), and the projected month PMI cancels.
PMI (private mortgage insurance) is a monthly fee conventional lenders add to your mortgage payment when your down payment is under 20% of the home price; it protects the lender if you default, not you. It typically costs roughly 0.5% to 1.5% of the loan balance per year — the PMI Cost Lab below prices your exact monthly premium, your total cost until PMI ends (78% LTV automatic), and the month it finally cancels.
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Full written guide, sources, and FAQs
PMI is the mortgage fee most buyers never see coming. Two shaded PMI bands on one shared track, one common 78% cutoff — see what the gap between 15% down and 20% down really costs before you sign.
This resource helps readers connect what is PMI to classroom practice, standards-aware implementation, and responsible next steps for schools and sponsors.
Private mortgage insurance — PMI — is a monthly charge most conventional lenders add to your mortgage payment when your down payment is smaller than 20% of the home's price. The policy protects the lender if the loan stops being paid; it does not protect you. Industry trackers put typical premiums at roughly 0.5% to 1.5% of the loan balance per year, with your credit score, down payment, and loan type doing most of the pricing work.
This Cost Lab turns that definition into your numbers. Move the home-price, down-payment, credit-tier, and loan-type controls, and three outputs update instantly: the monthly premium added to your payment, a cumulative invisibility penalty meter that totals every PMI dollar you would pay until PMI ends automatically, and a projected cancellation month based on the federal rule that PMI terminates at 78% loan-to-value. A single shared amortization track then carries two shaded PMI bands — 15% down against 20% down — toward one common 78% line, so the old twenty-percent rule becomes visible math.
Most free calculators are built to capture a lead; this one is built to teach. The Cost Lab is a pure educational simulation — no account, no personal data, and nothing you enter is sent anywhere, because every calculation happens on the page — and its one-page printable summary is made for classrooms, first-time-homebuyer workshops, and housing counseling sessions rather than for a sales call. That is the Success voice behind every tool in this library: price the trade-off in plain numbers, show the mechanism underneath, and hand you the summary so you walk into a lender conversation already knowing what the missing five percent of down payment would cost.
The lab runs on four inputs you can set in seconds. None require personal information, and nothing you enter is sent anywhere — every calculation happens on the page. Start with a real listing price or a realistic range for your market, then adjust the other three controls to see which lever moves your premium most.
Set the lab to a $350,000 home, 10% down, and a mid-700s credit tier. Using an illustrative 0.6% annual premium on the $315,000 loan, the monthly panel posts about $158 per month, the penalty meter begins filling toward roughly $17,000, and the cancellation clock projects close to nine years of on-time payments before the balance crosses 78% loan-to-value and PMI ends on its own. The meter runs to that automatic 78% termination; requesting cancellation earlier, at 80% loan-to-value, trims the final months of the meter.
Now slide the down payment to 15% and three panels react at once. The monthly premium eases to about $149, the cancellation clock pulls in by roughly three years, and the penalty meter's final total drops to about $11,000. Slide to 20% and everything zeroes out: that band never starts, while the 15% band keeps paying for years toward the same shared 78% cutoff.
Flip the loan-type switch to FHA and the same $350,000 home at 10% down tells a different story. FHA loans carry an upfront mortgage insurance premium — about 1.75% of the loan amount for most borrowers — plus an annual premium collected monthly; at 10% down the annual premium is locked in for at least 11 years, and below 10% down it runs for the life of the loan — and either way it never stops at a 78% line the way conventional PMI does. The cancellation clock on this track is a conventional-only privilege, and watching the FHA band roll past the 78% line without stopping is the fastest way to feel the difference.
Read the outputs as a comparison, not a quote. The one shared track answers the question behind the question — what will PMI cost me? — by showing what the missing five percent of down payment saves and what it delays. Remember the flip side: cash held back for the larger down payment is not available for emergencies or other goals, so the track frames a trade-off rather than issuing a verdict.
The most common PMI misunderstanding is the direction of protection. If a borrower stops paying, the insurance pays the lender — which is exactly why lenders can accept down payments as small as about three percent. The policy does not make your payment if you lose a job, does not prevent foreclosure, and returns nothing to you no matter how many years of premiums you send.
PMI is also not homeowners insurance. Hazard coverage protects the structure and your belongings and stays required for the life of the loan; PMI protects the lender and can end. Government-backed loans replace PMI with their own versions of mortgage insurance, which behave very differently — often far less generously for the borrower.
Every estimate in this lab is transparent, simplified, and educational. The model prices premiums from illustrative annual rates by credit tier, holds them constant, and projects the payoff clock on a 30-year fixed loan at an illustrative 6.5% interest rate. Real quotes depend on the insurer, loan size, occupancy, property type, and current market pricing, so treat the outputs as a well-lit ballpark — never a Loan Estimate.
PMI is one decision point in a longer homebuying journey, and this lab sits inside the housing and mortgage collection on this site. Use the printable one-page summary as a classroom handout or a first-time-homebuyer workshop worksheet, then continue down the path below to connect the premium you just priced to affordability, savings, and loan mechanics.
This page is an educational simulation, not a lender, insurer, or adviser. Outputs are illustrative estimates built from simplified public rules and industry ranges; they are not a quote, pre-approval, guarantee, or recommendation to buy, wait, or choose any loan product. Real premiums, cancellation timing, and eligibility depend on your lender, insurer, loan documents, and personal circumstances. Confirm details in writing with qualified professionals before acting on anything you see here.
PMI is insurance that protects your lender — and charges you for it — when you put less than 20% down on a conventional mortgage. If you stop paying, the insurer pays the lender. You get the loan with a smaller down payment; the lender gets protection; you get the monthly bill until you reach 20% equity.
A common working range is roughly 0.5% to 1.5% of the loan balance per year. On a $315,000 loan, that works out to about $131 to $394 per month. Your credit score, down payment, loan type, and the insurer's pricing decide where you land inside that range — which is exactly what the lab above estimates.
Under the federal Homeowners Protection Act, servicers must terminate PMI automatically at 78% loan-to-value on the original amortization schedule, as long as your payments are current, and no later than the halfway point of the loan term. You can usually request cancellation even earlier, at 80% loan-to-value, with a clean recent payment history.
Pay extra principal to reach 80% loan-to-value, then submit a written cancellation request to your servicer, who may ask for documentation of your balance or home value. Every extra dollar of principal shortens the penalty meter in this lab. Ask your servicer exactly what evidence they require before they will cancel.
PMI insures conventional loans and can be canceled under federal rules. MIP is the government version charged on FHA loans: an upfront premium plus an annual one, and for most borrowers who put less than 10% down the annual MIP lasts the life of the loan. The lab's loan-type switch shows how differently the two behave.
Sometimes. Options include loan types without monthly mortgage insurance (such as VA loans with their one-time funding fee), lender-paid structures that trade PMI for a higher interest rate, and piggyback second-loan setups — each with real trade-offs worth comparing side by side. The shared track above shows what 20% down saves; the related affordability and mortgage guides show how to weigh the rest.
Consumer Financial Protection Bureau
Consumer Financial Protection Bureau
Consumer Financial Protection Bureau
The Urban Institute
U.S. Department of Housing and Urban Development
Board of Governors of the Federal Reserve System
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