Mortgage insurance calculator: what PMI actually costs you
Private mortgage insurance is the most misunderstood line on an American mortgage. It protects the lender, not you, and you pay for it. If you put down less than 20 percent on a conventional loan, it is added to your payment automatically and it quietly stays there for years.
Typical annual PMI rates run from about 0.3 percent to 1.5 percent of the loan amount, driven mostly by your credit score and how little you put down. On a 315,000 dollar loan at 0.5 percent, that is roughly 131 dollars a month. It is not a fee you pay once. It is a subscription to your own lack of a down payment.
The good news, and the part most calculators never tell you, is that federal law puts an expiry date on it.
When does PMI drop off? The two dates that matter
The Homeowners Protection Act of 1998 gives you specific rights, and they are worth knowing precisely, because the difference between them is real money.
- 80 percent LTV: you can request cancellation. Once your balance is scheduled to reach 80 percent of the home's original value, you have the legal right to ask your servicer in writing to cancel PMI. They must consider it. You need to be current on payments, and they may require an appraisal.
- 78 percent LTV: automatic termination. Your servicer is legally required to cancel PMI on its own once the balance is scheduled to reach 78 percent of the original value. No request, no paperwork.
- The midpoint backstop. If you somehow have not reached 78 percent, PMI must end at the midpoint of the loan term regardless, which is year 15 of a 30-year mortgage.
Important detail people get wrong
Both thresholds are based on the home's original value, meaning your purchase price or the original appraisal, not what the house is worth today. Rising home prices do not automatically move your termination date. However, appreciation can support a separate request for early cancellation based on a current appraisal, which typically costs 300 to 600 dollars. If your home has jumped in value, that appraisal can pay for itself many times over.
FHA is a different animal
None of the above applies to FHA loans. FHA charges a mortgage insurance premium rather than PMI, with an upfront charge plus an annual premium, and on most FHA loans that premium lasts the life of the loan. The usual way out is refinancing into a conventional mortgage once you have 20 percent equity. VA loans, by contrast, have no monthly mortgage insurance at all. If you are eligible for a VA loan, that alone can be worth tens of thousands of dollars.
Paying extra: the single highest-return move available to you
Extra principal does two things at once, and most people only count the first.
The obvious benefit is interest. On that 315,000 dollar loan at 6.5 percent, adding 200 dollars a month saves about 104,950 dollars in interest and pays the mortgage off roughly 6.7 years early.
The hidden benefit is PMI. The same 200 dollars a month brings the 80 percent threshold forward by about 33 months, saving another 4,331 dollars in premiums. That is a second, invisible return on the same money, and it is why extra payments made in the early years are worth so much more than the same payments made later.
One caveat, stated plainly. Do not prepay a 6.5 percent mortgage while carrying credit card debt at 22 percent. Clear the expensive debt first with our credit card payoff calculator, and make sure your emergency fund is funded before you lock money into a house you cannot easily withdraw it from.
How much house can you actually afford?
Lenders will approve you for more than you should spend. That is not cynicism, it is how the incentives work.
The common guideline is the 28/36 rule: your total housing payment should stay under 28 percent of gross monthly income, and all your debt payments together under 36 percent. On 6,000 dollars a month of gross income, that puts housing at roughly 1,680 dollars.
Treat that as a ceiling, not a target. A payment you can technically qualify for and a payment you can comfortably live with are different numbers, and the gap between them is where financial stress lives. Enter your income in the advanced options above and the calculator will check your payment against both ratios.
15-year versus 30-year: the honest comparison
A 15-year mortgage costs dramatically more per month and dramatically less overall. On a 315,000 dollar loan, a 15-year at 6 percent runs about 667 dollars a month more than a 30-year at 6.5 percent, and saves roughly 238,298 dollars in total interest.
That comparison makes the 15-year look obvious. It is not, for one reason: the 30-year gives you an escape hatch. If you take the 30-year and voluntarily pay extra, you capture most of the benefit while keeping the option to drop back to the lower required payment if you lose your job. The 15-year locks you into the higher payment permanently. Choose it only if the payment still leaves room for retirement contributions and an emergency fund.
What is actually in your monthly payment
Lenders quote principal and interest. Your actual payment has four or five parts, commonly called PITI:
- Principal. The part that pays down what you borrowed.
- Interest. The rent you pay on the money. Early on, this is almost the whole payment.
- Taxes. Property tax, usually collected monthly into escrow. This varies wildly by state, from under 0.5 percent to over 2 percent of home value.
- Insurance. Homeowners insurance, also escrowed. Rising fast in hail and hurricane states.
- PMI and HOA. Mortgage insurance if you put down under 20 percent, and association fees if the property has them.
On a 315,000 dollar loan at 6.5 percent, the very first payment is roughly 1,706 dollars of interest and only 285 dollars of principal. That ratio slowly reverses over thirty years, and the amortization schedule above shows exactly how.
Before you commit to any of it, put the full payment into our budget planner and see whether it genuinely fits your month, not just your loan application.