You punch your numbers into a mortgage calculator, see a comfortable payment, and start house-hunting with confidence. Here's the problem: most of those calculators are quietly leaving out a cost that can add real money to your bill every month. They show you a payment that doesn't exist — and the gap between the fantasy number and reality has surprised a lot of buyers at closing.
The cost they hide: mortgage insurance
The number most calculators show you is just principal and interest — maybe with taxes and insurance. What they routinely skip is mortgage insurance (MI), the extra charge that often applies when you put down less than 20%. Leave it out and the payment looks smaller, but the real one is bigger.
The big bold price is the base fare. Then come the taxes, the seat fee, the bag fee — and the total at checkout is nothing like the headline. A P&I-only calculator is the bold headline price. Mortgage insurance is one of those fees that doesn't show up until the bill is real. You want the checkout total before you fall in love with a house.
The three loan types handle MI very differently
This is where it gets important, because "mortgage insurance" isn't one thing.
| Loan type | How MI works | When it can end |
|---|---|---|
| Conventional (PMI) | PMI generally applies when you put down under 20%. | Can often drop as you reach ~20% equity; lenders generally must remove it automatically at a set point. |
| FHA (MIP) | FHA charges a mortgage insurance premium. | With under 10% down, the annual MIP can last the life of the loan — often removed only by refinancing. |
| VA | No monthly mortgage insurance for eligible borrowers. | N/A (a one-time funding fee may apply instead). |
Conventional: PMI can be temporary
On a conventional loan, PMI is often the easiest to shed. As you pay down the balance and build equity — commonly around 20% — you can typically request cancellation, and under federal rules lenders generally must remove it automatically once you hit a set threshold. That makes "put less than 20% down now, drop PMI later" a real strategy for many buyers.
FHA: the trap people miss
FHA is different, and this is the part that catches people. If you put down less than 10%, the annual MIP can stick around for the life of the loan. Building equity alone may not remove it — often the only exit is refinancing into a different loan entirely. That doesn't make FHA bad; it makes it a cost you need to see clearly before you choose it.
VA: no monthly MI
For eligible borrowers, VA loans generally carry no monthly mortgage insurance at all — a meaningful advantage. There can be a one-time funding fee, but the absence of a recurring MI line can make the true monthly payment noticeably friendlier.
Use a calculator that tells the truth
The fix is simple: use a calculator that breaks out MI as its own line so you see the real PITI + MI total — not a flattering P&I-only number. Our Mortgage Payment + MI calculator is built to show that line, so the payment on the screen is the payment you'd actually budget for.
Questions to ask before you commit
- "What's my full PITI + MI payment, not just principal and interest?"
- "On this loan, when could the mortgage insurance come off?"
- "If I go FHA with low down, does the MIP last the life of the loan?"
- "How would a bigger down payment change my MI line?"
Want the real payment, MI and all?
Grab the free Stuck Homeowner's Playbook and run your scenario with a calculator that shows mortgage insurance as its own line.
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Related free tools: Mortgage Payment + MI calculator · down payment comparison
Educational content only — not financial, mortgage, or legal advice, and not a loan offer or solicitation. Timothy George is the founder of Infinity Financial Mortgage Corporation with 20+ years in mortgage and auto finance; this is independent educational material and he is not acting as a currently-licensed loan originator. Mortgage insurance rules, rates, and cancellation terms vary by loan type and program — confirm specifics with a currently-licensed professional before you act.