What Is Private Mortgage Insurance (PMI)? Formula, Costs & How to Get Rid of It

If you are buying a home with a down payment of less than 20%, you will almost certainly have to pay Private Mortgage Insurance (PMI). To most buyers, PMI feels like throwaway money - a monthly fee that protects your lender, not you, while adding hundreds of dollars to your mortgage payment.

But while PMI is an added cost, it's also a tool that enables millions of people to buy homes years earlier than if they had to wait to save a full 20% down payment.

Here is exactly how PMI works, what it costs, how to calculate it, and how to get rid of it as quickly as possible.

What Is Private Mortgage Insurance (PMI)?

PMI is an insurance policy required by conventional mortgage lenders for buyers who put down less than 20% of the home's purchase price.

It is crucial to understand: PMI does not protect you or your home. If you lose your job and can't make your payments, PMI does not step in. Instead, it protects the *lender* in case you default on the loan and the home goes into foreclosure. Lenders require it because loans with less than 20% equity (also known as a Loan-to-Value ratio, or LTV, higher than 80%) historically have a much higher rate of default.

Once you build 20% equity in your home (meaning your LTV falls to 80%), PMI is no longer required and can be canceled.

How Much Does PMI Cost? Step by Step

The annual cost of conventional PMI typically ranges from 0.2% to 2.0% of your total loan amount. The exact rate depends on three major variables:

Step 1: Determine your LTV category

Putting 5% down means an LTV of 95%. Putting 10% down means an LTV of 90%.

Step 2: Find your PMI rate range

*This table illustrates typical conventional annual PMI rate ranges by Credit Score and LTV:*

Step 3: Calculate the Monthly Cost

PMI is calculated annually but paid monthly.

Worked Example: The Real Cost of PMI Over Time

Let's look at a realistic scenario: Buying a $400,000 home with a 10% down payment ($40,000), resulting in a $360,000 loan amount.

Let's compare two buyers: Buyer A (780 credit score) and Buyer B (670 credit score).

Buyer A (780 Credit Score)

* Loan Amount: $360,000

* Down Payment: 10%

* Estimated PMI Rate: 0.30% (from the high-credit bracket)

* Annual PMI Cost: $360,000 × 0.0030 = $1,080

* Monthly PMI Cost: $1,080 / 12 = $90.00/month

Buyer B (670 Credit Score)

* Loan Amount: $360,000

* Down Payment: 10%

* Estimated PMI Rate: 1.10% (from the lower-credit bracket)

* Annual PMI Cost: $360,000 × 0.0110 = $3,960

* Monthly PMI Cost: $3,960 / 12 = $330.00/month

Over the course of 5 years (a common timeframe to reach 20% equity), Buyer A pays $5,400 in PMI, while Buyer B pays $19,800 for the exact same home and loan! This demonstrates why improving your credit score before buying is one of the highest-return financial moves you can make.

5 Ways to Avoid or Eliminate PMI

You don't have to keep paying PMI forever. Here are the 5 best strategies to avoid or eliminate it early:

Common Mistakes to Avoid

* Assuming PMI cancels automatically at 80%: The law only requires *automatic* termination at 78% LTV. You must manually request it at 80% to save those extra months of premiums.

* Confusing PMI with FHA MIP: Conventional PMI can be removed. FHA mortgage insurance premiums (MIP), however, typically stay for the entire life of the loan if you put down less than 10%. The only way to remove MIP is to refinance into a conventional loan.

* Neglecting home improvements: If you have done major renovations (like a kitchen or basement remodel), you can leverage that added value to request early PMI cancellation via a new appraisal.

The Bottom Line

PMI is not an ideal expense, but it is a highly functional tool. By understanding how credit scores and LTV impact your rate, you can plan your purchase strategy and set up a clear path to eliminate PMI early.

Estimate your exact PMI costs using our free PMI Calculator.