How the Appraisal Sets Your Conventional Loan Amount on a Purchase

The Quick Read: On a purchase, the lender sizes your loan to the lower of the contract price or the appraised value. A high appraisal does not raise your loan, because the price is the cap. A low appraisal shrinks the value the lender uses, so the gap between price and value usually becomes cash you bring or a price cut you negotiate.

This is the rule that surprises most buyers. They assume the lender finances the contract price. It does not. It finances a percentage of the lower number, and everything else here follows from that one fact.

Key Terms Defined

Sales price: The price in your signed purchase contract.

Appraised value: An independent opinion of what the property is worth, reported by a licensed appraiser the lender engages.

Loan-to-value (LTV): The loan amount divided by the value the lender uses. A 95% LTV means the loan is 95% of that value. Final terms depend on lender guidelines, property type, leverage, and the borrower’s complete credit picture.

Appraisal gap: The shortfall when the appraised value comes in below the sales price.

Reconsideration of value: A formal request that the appraiser or lender take a second look, usually backed by new information.

Mortgage insurance: Coverage that conventional loans carry above 80% LTV. It protects the lender, and you pay for it. These specifics are subject to lender guidelines and a full review of property, leverage, and credit.

Which Value Does the Lender Use on a Purchase?

The lender uses the lower of the sales price or the appraised value. Fannie Mae’s Selling Guide states that for a purchase money loan, the value used in determining the LTV ratio is the lower of the two. Freddie Mac‘s guide builds LTV the same way: the first-lien mortgage amount divided by the “value.”

That produces three outcomes.

The “above price” row trips people up. Say you’re buying a home and the appraiser values it well over what you agreed to pay. You’ve bought at a discount to value, which is good for your equity. It does not buy you a bigger loan, and it does not remove mortgage insurance. The lender still measures against the price.

Why does the rule exist? The loan is secured by the property. If the price runs ahead of the value, the lender’s cushion is thinner than the contract suggests. Using the lower number protects that cushion.

How the Loan Gets Sized, Step by Step

Across the wholesale programs Lendmire places files with, the sequence is consistent. Here is how a purchase moves from contract to final loan amount.

1. You sign a contract. The price is set. Your planned loan is a percentage of it.

2. The lender orders the appraisal. The lender enters the sales price and the appraised value into the automated underwriting system, which calculates LTV from those inputs.

3. The appraiser gets the deal facts. Agency rules tell lenders to give the appraiser the financing data, including any seller contributions, and to make sure the value is adequately supported.

4. The appraiser reports value and marketability. If a property has features the neighborhood doesn’t accept, the appraiser must address the effect on value and marketability.

5. You receive a copy. Under the federal ECOA Valuations Rule, lenders must give applicants a copy of the appraisal. Per the federal consumer-finance regulator’s rule summary, you receive it automatically; you don’t have to ask.

6. The lender recalculates. If value is below price, the lower figure drives LTV, and the file is re-run against program limits.

7. The gap gets resolved. You and the seller decide how, covered below.

One more recalculation matters. If seller contributions exceed the allowed limit, the excess is treated as a sales concession and subtracted from the price. The lower of the reduced price or the appraised value then drives LTV.

A Worked Example With Percentages

Take a purchase contract and a planned 80% loan. The appraiser values the home at 4% below the contract price.

The lender now measures 80% against the lower value, not the price. You have two paths:

• Keep the original loan amount. The loan is unchanged in size, but it’s now a higher percentage of a lower value. It lands above 80% LTV, and mortgage insurance may become required.
• Hold to 80% of the new value. The loan shrinks. The difference between your old loan amount and the new one, plus the price gap, comes out of your pocket or out of the seller’s price. Terms depend on the lender’s guidelines, the property type, the leverage, and a full review of the credit profile.

Either way, the 4% shortfall in value has to be absorbed by someone. Extra cash from you does not create a bigger loan. It fills the gap, and it sits on top of the down payment you already planned.

Now scale it. A 2% gap is a small cash adjustment. A 10% gap can change which program tier the file fits, and it can eat the cushion you set aside for reserves and closing costs. The size of the gap, not just its existence, decides how disruptive it is.

What a Low Appraisal Does to Your Cash

A low appraisal hits three places at once.

Cash to close. Because the loan is sized to the lower value, the shortfall turns into a price reduction, extra down payment, or a mix of both.

Mortgage insurance. Conventional loans require it above 80% LTV. Per Fannie Mae’s rule, a conventional first mortgage above 80% LTV needs primary mortgage insurance unless another charter-compliant credit enhancement applies. If a low appraisal pushes you across that line, the monthly budget changes. Published typical annual premiums run from 0.58% to 1.86% of the balance. That is a range, not a quote, and your file’s actual figure depends on credit, leverage and the insurer. The exact numbers vary by lender and program and follow a full review of property, leverage, and credit.

Once you’re in, the insurance is not permanent. You may request cancellation at 80% of the original value with good payment history, no subordinate liens and no decline in value. The servicer must terminate it automatically at 78% under the Homeowners Protection Act.

Seller help. Seller concession caps are measured against the lower of price or appraised value, not against the loan. A lower appraisal shrinks the dollar amount of seller credit the rules allow. The exact limits depend on down payment and occupancy, so ask your loan officer for the current figure on your file.

Where Leverage Limits Can Push You Out

Appraisals matter more when you’re near a program ceiling. For a principal residence purchase, the wholesale conventional programs top out at 97% LTV (3% down) on a one-unit, fixed-rate loan when at least one borrower is a first-time buyer, meaning no ownership interest in a residence in the previous three years. Fannie Mae’s 97% LTV FAQ lays out that eligibility, including the requirement that the loan be fixed-rate and underwritten through Desktop Underwriter. Otherwise the ceiling is 95% LTV (5% down). Two- to four-unit principal residences also top out at 95%. Final terms depend on the lender’s guidelines, the property type, and the borrower’s complete credit picture.

Here’s the catch. If you’re at 97% and the appraisal comes in low, holding your original loan amount would push you past the ceiling. You can’t just accept the higher LTV. The loan must shrink or the cash must go up. Buyers at the program maximum have the least room to absorb a gap, so they should carry extra reserves into the appraisal.

Buyers putting 20% or more down have more flexibility. They have a buffer before mortgage insurance enters, though a large gap still costs cash.

Occupancy also decides leverage. Second homes top out at 90% and investment properties lower still, so the same appraisal can leave different room depending on how you’ll use the home. For the exact figures on your file, the Fannie Mae Eligibility Matrix is the reference, and it changes periodically.

What to Do When the Appraisal Comes In Low

You have options. Which one fits depends on the contract and how much you want the house.

Think of it as a negotiation anchored by a neutral number. The appraisal gives you a documented reason to ask the seller for a lower price. Whether the seller agrees depends on the market and how much the seller needs the sale.

Reconsideration of value. You can challenge an appraisal you believe is inaccurate. The CFPB has said borrowers can use a reconsideration process, and some lenders include instructions for requesting one with the appraisal copy. The request goes through your lender, not directly to the appraiser. Bring something concrete: comparable sales the appraiser may have missed, or a factual error in the report such as square footage or bedroom count. Opinion alone rarely moves the number. And be realistic. It sometimes changes nothing.

Contingencies. Whether you can walk away depends on your purchase agreement and state law. If your contract has an appraisal or financing contingency, you may have a way out. If you waived it to make your offer stronger, you’ve committed to covering any gap in cash. That’s a real exposure in a hot market, and worth sizing before you waive anything.

Where the Rule Bends

The lower-of rule is the general case. A few situations work differently.

Value acceptance. On some files run through Desktop Underwriter, no appraisal is required. Fannie Mae calls this value acceptance (it retired the term “appraisal waiver”), and the agency accepts the lender’s value estimate. In a purchase, that estimate isn’t necessarily the contract price. Lenders must still order an appraisal if they have reason to think one is warranted. A related option substitutes interior and exterior property data collection for the appraisal. For more on this, see Lendmire’s piece Conventional Loan Appraisal Waiver Rules for a Condo Purchase.

Subsidized purchases. For shared-equity and certain Community Seconds transactions with a subsidized price, the system uses the appraised value alone, not the lesser of price or value. Fannie’s own example has a subsidized price well below appraised value, so the LTV is measured on the appraisal. This applies only to principal residences.

Renovation loans. For purchase renovation loans, LTV is based on the lesser of the as-completed appraised value or the purchase price plus renovation costs. The appraisal reflects what the home will be worth after the work.

Unique properties. If the appraiser can’t find market acceptance for a property so unusual that a reliable value opinion is impossible, the property isn’t acceptable as security for a loan sold to Fannie Mae. That isn’t a gap problem. It’s an eligibility problem.

Manufactured homes. These carry their own limits, so don’t assume the standard leverage tables apply.

Practical Takeaways From the Broker’s Chair

In files like these, the borrowers who handle a low appraisal well made three decisions before the appraiser arrived.

First, they knew their walk-away number. A buyer who has decided in advance how much cash they’ll add, and how much they won’t, negotiates calmly.

Second, they kept reserves separate from the down payment. A gap paid from the same pool that was supposed to cover closing costs and post-closing cushion creates a second problem.

Third, they read the appraisal when they received it. Factual errors happen, and the ECOA copy is your chance to catch them. A wrong square footage figure is easy to document and sometimes moves the value.

There’s a flip side. If you’re buying well under what comparable homes sold for, a low appraisal is less likely, and over-preparing for it can cost you the house. If the price is stretched against recent sales, expect resistance. The tradeoff is between making a strong offer and keeping a cash buffer. Neither is free.

Mortgage insurance, ratios and credit also matter here. The wholesale conventional programs generally start at a 620 decision score, and the automated finding governs most files, with a total ratio ceiling of 50%. A file that’s tight on ratios has less room to absorb extra mortgage insurance after a low appraisal. All of this is subject to lender guidelines and full file review, and nothing here is a commitment to lend.

If you want to compare structures before you shop, Lendmire’s conventional loan programs page lays out how the program fits different buyers.

If you are buying a home and want to see whether a conventional loan fits your file, Lendmire can help you compare the options and what each one asks of the file.

For your own numbers, request a scenario review with Lendmire.

About Lendmire

As a mortgage broker (NMLS# 2371349), Lendmire helps homeowners and home buyers in 16 states with FHA, VA, conventional and jumbo purchase and refinance loans arranged through wholesale lenders. Lendmire is never the lender; program terms are set by the lender and the agency guidelines. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.

References

1. Fannie Mae Selling Guide B7-1-01: Provision of Mortgage Insurance

2. Freddie Mac

3. CFPB summary of the ECOA Valuations Rule

4. Fannie Mae FAQs: 97% LTV Options

5. Fannie Mae Eligibility Matrix

6. CFPB: Mortgage borrowers can challenge inaccurate appraisals through the reconsideration of value process

7. Fannie Mae