PMI usually costs between $120 and $600 a month on a Phoenix or Scottsdale purchase with under 20% down, and the exact number swings on your credit score more than anything else. On a $500,000 home with 5% down at Freddie Mac's 7.03% average for the week of September 24, the principal and interest is about $3,170. PMI on top of that is real money, and almost nobody sees the number until they are deep in a loan estimate. Here is what it costs, what moves it, and how to get rid of it.

What PMI is and who it protects

Private mortgage insurance protects the lender, not you. It is required on a conventional loan when your down payment is under 20%, and it covers the lender if you default. The Consumer Financial Protection Bureau notes it can be charged as a monthly premium, an upfront premium at closing, or both.

You pay for something that covers the other side of the table. That stings, but it is also what lets a borrower with $25,000 down buy a $500,000 house in the Valley instead of waiting years to save $100,000. PMI is a price for getting in sooner. Whether that price is worth it is a math question, not a moral one.

What PMI costs on a Maricopa County purchase

Expect to pay roughly 0.3% to 1.5% of the loan amount per year, charged monthly. Your credit score is the biggest lever, then your down payment. The table uses a $475,000 loan, which is a $500,000 home with 5% down. These are illustrative rates to show the spread, not a quote.

The gap between the top row and the bottom row is $337 a month on the same house. Same price, same down payment, same lender. Only the credit profile changed. That is why improving your score by even 20 points before you apply can be worth more than a quarter point of rate. Our guide on the credit score you need to buy a house in Arizona shows where those breakpoints fall.

PMI is not a fixed fee. It is a price tag on your credit score and your down payment.

How the down payment changes the total

More down means a smaller loan and a smaller PMI rate, until PMI disappears at 20%. The table runs a $500,000 home at 7.03% with an illustrative PMI rate that falls as the down payment grows.

The jump from 5% to 20% down saves $798 a month, but it costs you $75,000 more up front. If that $75,000 would sit in a savings account earning 4%, you give up about $250 a month in interest. The real cost of the extra down payment is smaller than it looks. If you are weighing it, our post on how much down payment you actually need in Arizona works through the trade.

Three ways to pay for PMI

Monthly PMI is the default, but it is not the only structure. Lenders can also charge it upfront or fold it into your rate, and each one changes the math.

Monthly premium. You pay it with your mortgage and it stops when you cancel. This is the most flexible option for anyone who expects to refinance or sell within a few years.

Single premium. You pay one lump sum at closing, which can run several thousand dollars on a loan this size. The monthly payment is lower, but if you sell in three years you do not get that money back.

Lender-paid. The lender covers it and raises your rate to compensate. There is no monthly line item, but the higher rate never goes away unless you refinance. On a 30-year loan that can cost more than monthly PMI would have. A broker can price all three side by side, which is the part a single-lender quote never shows you.

Run your own numbers

How and when PMI goes away

PMI is not permanent on a conventional loan. Under federal rules explained by the CFPB's PMI cancellation guidance, there are three exits:

• 80% request. Ask in writing once your balance reaches 80% of the home's original value. You need to be current, have no junior liens, and be able to show the value has not fallen.
• 78% automatic. Your servicer must end PMI when you reach 78% of the original value, if you are current.
• Midpoint. PMI must end the month after the midpoint of your loan term, about year 15 on a 30-year loan.

At 7.03%, the $475,000 loan in the first table needs about 130 payments to hit 80% of $500,000 on the schedule alone. That is close to eleven years. At a 0.75% rate, you could pay as much as $25,000 in PMI over that stretch. Waiting on the schedule is the slow route. Faster routes exist.

If Phoenix prices rise, a new appraisal can show your loan is under 80% of today's value, and you can ask to cancel early. That is the same logic behind refinancing to remove PMI. Extra principal payments speed it up too. Prepaying even $200 a month shaves years off the wait.

PMI compared with FHA mortgage insurance

FHA loans do not use PMI. They charge an FHA mortgage insurance premium instead, with an upfront charge and a monthly charge. On most FHA loans with under 10% down, that premium stays for the life of the loan. A conventional loan with PMI can be cancelled, an FHA loan usually cannot. Our FHA versus conventional comparison shows where each one wins. For buyers with a middling score, FHA can still be cheaper per month at the start. It is the long haul where conventional pulls ahead.

What this means for Scottsdale and Valley buyers

Do not chase 20% down if it wipes out your reserves. A buyer who puts every dollar into the down payment and has nothing left for a $9,000 AC replacement in July is worse off than one who pays PMI and keeps $25,000 in the bank. The Homes.com Phoenix housing market report shows where prices sit now, which tells you how fast a loan might reach the 80% mark. To see what is on the market, the Arizona Luxury Property Search covers Scottsdale and Metro Phoenix.

Our loan programs page lists the loans we shop, and our process shows how a purchase moves from pre-approval to keys. If you want to know who is running your file, learn about Pillar Mortgage Group.

Want your actual PMI cost? Start at pillarmortgagegroup.com, book a call, or fill in the form below. I will run it with you.

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