The PMI Cancellation Gap

The two thresholds, precisely

Both come from the Homeowners Protection Act of 1998, which governs private mortgage insurance on conventional loans.

• 80% loan-to-value — borrower-requested cancellation. Once the original amortization schedule brings the balance to 80% of the home’s original value, the borrower can submit a written request to cancel PMI. The loan needs to be current with a qualifying payment history, and the lender may require confirmation that no junior lien has been added since closing.
• 78% loan-to-value — automatic termination. The lender must cancel PMI on its own once scheduled amortization reaches 78% of the original value, provided the loan is current. No request is required.

The gap between those two points is money that only gets paid because the 78% termination is passive and the 80% cancellation is not. Nothing about requesting early demands qualification beyond what the automatic cutoff already requires later — it just requires asking.

There is a third, backstop threshold worth knowing even though it never binds in any scenario below: if a loan somehow fails to reach 78% LTV on schedule — an interest-only period, for instance — the law still requires PMI to end at the midpoint of the amortization term regardless of LTV, which is 15 years into a standard 30-year loan. Every scenario here reaches 78% well before that.

What the gap actually costs

Tracking the loan balance against the home’s original price every month, with PMI at the published 0.6%/year assumption. All rows use 6.5% over 30 years.

By home price (5% down — the most common PMI-triggering profile)

By down payment ($400,000 home)

A larger down payment reaches 80% LTV sooner in absolute time, but the gap itself can run slightly longer, because the balance moves through the 80%–78% band at a different speed relative to the payment. The dollar cost scales with loan size either way.

By state, using each state’s median home value (5% down)

The gap holds steady across every state because it is driven by amortization mechanics, not by price — home price scales the dollar cost, not the timing. Median values come from the published state dataset, free to download under CC BY 4.0.

The bigger number underneath the gap

The gap is the avoidable part, not the whole cost. On the $400,000 / 5%-down example, a borrower who cancels the moment they hit 80% LTV still pays $23,560 in PMI over the year 10.3 it takes to get there — money nobody can skip, because the loan simply has not paid down that far yet. Wait for the automatic cutoff and the total rises to $25,650.

That reframes what the gap is: not the main expense of PMI, but the last entirely optional slice of a cost that is already more than a decade long.

Assumptions, disclosed

Stated plainly rather than letting a reader assume more precision than the model has.

• No home-price appreciation is modeled. These are amortization-only figures: the schedule reaches 80% and 78% LTV through principal paydown alone, with the home’s value held flat at the purchase price. Most homes appreciate, and appreciation is a separate path to cancellation — but a stricter one, not the same threshold sooner. On Fannie Mae-backed loans, cancelling on a new appraisal instead of the original schedule requires LTV at or below 75% if the loan is between two and five years old, or 80% once it is past five years; if the two-year minimum is waived because the added value came from the borrower’s own improvements, the bar is 80%. That is investor guidance rather than statute, and other investors may set comparable but not identical terms. The figures here are the floor a borrower can count on regardless of what the local market does.
• PMI is modeled as a flat 0.6%/year of the original loan amount rather than a declining percentage of the shrinking balance — the same simplification this site’s calculator uses, published on the methodology page. Real PMI pricing varies by credit score, LTV band and insurer, and some policies do step down. Individual dollar figures will therefore differ; the mechanism — a fixed window between request-eligible and automatic — does not.
• The 6.5% rate and 5% down payment are the site’s standard worked example, not a claim about the average borrower today. The tables above vary both deliberately so no reader is stuck with one scenario.
• One figure this article deliberately does not give is what share of borrowers actually miss the 80% window. It is the obvious question, and no defensible source for it was found — so it is left out rather than estimated.

How to actually request it

Cancellation at 80% is not automatic — it has to be asked for, in writing.

1. 1Check the loan balance against 80% of the home's original purchase price — not what the home is worth today.
2. 2Send a written cancellation request to the loan servicer. Nothing happens automatically at this threshold; the request is the whole mechanism.
3. 3Confirm the loan is current and the payment history qualifies: no payment 30 or more days late in the past 12 months, and none 60 or more days late in the 12 months before that.
4. 4Check that no second mortgage or home equity line has been added since closing, and expect the servicer to require evidence — typically an appraisal, at the borrower's expense — that the value has not fallen below the original.

None of that is unusual to qualify for: it is the same payment-history bar the loan has to clear for automatic termination later anyway. The only real difference is that one of the two requires a letter and the other does not.