PMI

Turning Loan-to-Value Into a Monthly PMI Cost and Cancellation Timeline

PMI (private mortgage insurance) is an annual rate applied to your loan balance and billed monthly, and it stops automatically once your balance falls to 78% of the home’s original value. Enter your loan amount, home value, and PMI rate to estimate the monthly cost, then add your interest rate and loan term to project how many years you’ll actually owe it before hitting that 78% cancellation threshold.

This is distinct from the Mortgage Calculator calculator, which takes a monthly PMI dollar figure as a plain input rather than estimating it — this calculator’s result is meant to feed straight into that field.

The Formula

$$\vC{\text{Monthly PMI}} = \frac{\vA{\text{Loan Amount}} \times \vB{\text{Annual PMI Rate \%}}}{12}$$ $$\vD{\text{Loan-to-Value}} = \frac{\vA{\text{Loan Amount}}}{\text{Home Value}} \times 100$$

The months remaining until cancellation come from amortizing the loan forward, month by month, until the balance falls to 78% of the home’s original value — there’s no closed-form shortcut for that step, since it depends on the loan’s own interest rate and term.

Worked Example

A $240,000 loan on a $250,000 home (96% loan-to-value), at a 0.75% annual PMI rate, 6.5% interest, and a 30-year term:

1. Monthly PMI: $\vC{240,000 \times 0.0075 \div 12} = \$150.00$.
2. Annual PMI: $150.00 \times 12 = \$1,800.00$.
3. The balance reaches 78% of the home’s value ($195,000) after about 140 months (11.7 years), for a total of roughly $21,000 in PMI paid over that time.

Source: Consumer Financial Protection Bureau: What Is Private Mortgage Insurance?

Key Factors to Consider

• PMI protects the lender, not the borrower, even though the borrower pays for it. If a borrower defaults, PMI compensates the lender for its loss on the loan — it doesn’t provide any benefit or payout to the borrower themselves, which is why removing it as soon as legally possible is generally worthwhile.
• A borrower can often request PMI cancellation earlier than the automatic 78% threshold this calculator estimates. Federal law generally allows requesting cancellation once the loan balance reaches 80% of the home’s original value (a few percentage points earlier than the automatic 78% cutoff), provided payments are current — actively requesting cancellation, rather than waiting for it to happen automatically, can shave a little time off what this calculator projects.
• Home value appreciation can reach the cancellation threshold faster than scheduled loan paydown alone. If a home’s market value rises meaningfully after purchase, a new appraisal showing that higher value can sometimes qualify a borrower for PMI removal sooner than the original-value-based schedule this calculator projects — though lenders generally require a minimum amount of time to have passed and often a professional appraisal to confirm it.
• A larger down payment avoids PMI altogether, which is worth weighing against other uses for that same cash. Since PMI exists specifically because a down payment fell below 20%, reaching that threshold upfront (via a bigger down payment, or a piggyback second loan) eliminates the cost entirely — though that means tying up more cash at closing instead of investing it or keeping it liquid.

Common Mistakes

• Assuming PMI cancels automatically the moment the balance crosses 78%. The 78% threshold is based on the loan’s original amortization schedule, not extra payments made along the way — a borrower who’s paid ahead of schedule usually needs to actively request cancellation rather than wait for it to trigger automatically.
• Forgetting that a home value decline can push the cancellation date later, not earlier. This calculator projects the timeline based on the home’s original value — if the home has actually lost value since purchase, a lender may require a new appraisal before removing PMI even after the original-value-based 78% mark is reached.
• Confusing PMI with a mortgage insurance premium (MIP) on an FHA loan. PMI applies to conventional loans and can be cancelled once enough equity builds up; FHA loans use a different insurance (MIP) with its own separate, often stricter removal rules — the two aren’t interchangeable when estimating when insurance costs will end.

Useful to Know

• Deciding how much to put down to avoid PMI in the first place? Down Payment Calculator finds the down payment needed to reach a target loan-to-value ratio.
• Need the full monthly payment picture once you know your PMI cost? Mortgage Calculator combines principal, interest, taxes, insurance, and PMI into one payment.
• Want to see your current loan-to-value ratio directly from your balance and home value? Loan-to-Value (LTV) Calculator calculates loan-to-value ratio for a mortgage or refinance.