Loan-to-Value: The Number That Drives Your Rate and PMI

Every mortgage quote you’ll ever get starts with one ratio: how much you’re borrowing against what the home is worth. That’s loan-to-value, or LTV – and understanding it puts you in control of your rate, your mortgage insurance, and your options.

What is loan-to-value (LTV)?

Loan-to-value is the size of your mortgage expressed as a percentage of the home’s value. Borrow $320,000 against a $400,000 house and your LTV is 80%. Put another way, LTV is the mirror image of your equity: an 80% LTV means you hold 20% of the home’s value, and the lender is exposed for the rest.

That exposure is why lenders care so much. If a loan ever goes bad, the equity cushion is what protects the lender from a loss. A borrower with 25% equity is simply a safer file than a borrower with 3% – so nearly everything about your loan, from pricing to mortgage insurance to program eligibility, is tiered by LTV.

How to calculate your LTV

The formula is one line: loan amount ÷ home value × 100. The nuance is which “value” counts:

• On a purchase, lenders use the lesser of the purchase price or the appraised value. If you’re paying $400,000 and the appraisal comes in at $395,000, the LTV is figured on $395,000.
• On a refinance, there’s no purchase price – the appraised value is the denominator. In a market like the East Valley, where values have moved a lot over the past several years, a Gilbert or Chandler homeowner who bought at 95% LTV may be sitting near 70% today without paying a dollar extra toward principal.

Quick worked example: $380,000 loan on a home that appraises at $475,000. 380,000 ÷ 475,000 = 0.80, so that’s an 80% LTV – right at the line where conventional PMI typically falls away.

Why LTV drives your mortgage rate

Lenders don’t price loans one at a time – they price them in risk buckets, and LTV is one of the two biggest inputs (credit score is the other). Conventional pricing uses a grid of adjustments, often called loan-level price adjustments, that step up or down by LTV tier. Cross from one tier into the next and the pricing on the same loan can shift, even though nothing else about you changed.

Two practical consequences:

• A slightly bigger down payment can outperform a much bigger one. Moving from 81% to 80% LTV can matter more than moving from 80% to 70%, because 80% is where a pricing tier and the PMI requirement both break. We routinely structure files around those breakpoints.
• LTV interacts with everything else. The same LTV prices differently on a primary residence versus an investment property, or for different credit tiers. That’s why two neighbors in Mesa with identical down payments can see different quotes – and why any specific rate you’re quoted is subject to change and depends on individual qualification.

LTV and PMI: the 80% line

On a conventional loan, financing more than 80% of the home’s value generally means carrying private mortgage insurance – a monthly premium that protects the lender, not you. PMI isn’t a penalty; it’s the tool that lets buyers get in with 3-5% down instead of waiting years to save 20%. But it’s a cost worth managing, and federal law (the Homeowners Protection Act) gives you two exits:

• Request cancellation at 80% LTV. Once your balance is scheduled to hit 80% of the home’s original value – or you get there early with extra payments – you can ask your servicer to drop PMI, typically with a good payment history and, in some cases, evidence the value hasn’t fallen.
• Automatic termination at 78% LTV. When the balance amortizes down to 78% of the original value, the servicer must cancel PMI on its own for a current loan.

There’s a third path the statute doesn’t spell out but lenders use every day: appreciation. If your home’s current value has risen enough that a new appraisal puts you at or below the required threshold, many servicers will remove PMI based on that value (seasoning rules apply), or a refinance can reset the loan at the lower LTV entirely.

Maximum LTV by loan type

Every program draws its ceiling in a different place. Maximums vary by lender and are subject to individual qualification, but these are the common marks:

Notice the pattern: the more the government stands behind the loan (VA, FHA), the higher the allowable LTV; the more the lender leans on the asset alone (jumbo, investment), the more equity they want up front.

How to improve your LTV

1. Put more down – strategicallyAim for the nearest pricing breakpoint (80% is the big one on conventional) rather than an arbitrary round number. Sometimes a few thousand dollars moves you a full tier.
2. Don’t finance what you don’t have toRolling closing costs or upgrades into the loan pushes LTV up. Paying them in cash – or negotiating a seller credit – keeps the ratio down.
3. Mind the appraisalOn a purchase, the lesser-of rule means a low appraisal raises your effective LTV. Renegotiating price or bringing the difference in cash are both options; we help you run that math before you panic.
4. Chip away at principalEven modest extra principal payments pull the amortization forward and reach the PMI-removal thresholds sooner.
5. Recheck after appreciationIf East Valley values have moved since you bought, a reappraisal may show a much lower LTV than your statement implies – the key that unlocks PMI removal or a better refinance tier.

Key terms

LTV (Loan-to-Value)

The loan amount as a percentage of the home’s value. An 80% LTV means 20% equity.

CLTV (Combined Loan-to-Value)

All loans against the property – first mortgage plus seconds and credit lines – divided by the value.

PMI (Private Mortgage Insurance)

The monthly premium on conventional loans above 80% LTV. Removable at 80% by request and automatically at 78% of original value under federal law.

Appraised value

A licensed appraiser’s opinion of the home’s market value. On purchases, lenders use the lesser of this and the purchase price to set LTV.