You agreed to pay $420,000. The appraisal came back at $400,000. Your lender will not lend against the price you agreed — it lends against the value it can verify, which means the $20,000 difference is now yours to solve, in cash, before closing.
You’ll learn exactly how a low appraisal changes your loan amount and down payment, your five options, what an appraisal gap clause actually commits you to, and when a rebuttal is worth attempting.
Why the Shortfall Lands on You
Lenders size a loan against the lower of contract price or appraised value. That is not negotiable, because the appraised figure is what secures the debt if you default.
On a 20%-down purchase at $420,000, you expected a $336,000 loan and $84,000 down. With the appraisal at $400,000, the lender’s 80% is calculated on $400,000 — a $320,000 loan. The price has not changed, so you now need $100,000 down. The gap became a cash requirement.
| As expected | After a low appraisal | |
|---|---|---|
| Contract price | $420,000 | $420,000 |
| Appraised value | $420,000 | $400,000 |
| Maximum 80% loan | $336,000 | $320,000 |
| Cash required | $84,000 | $100,000 |
Your Five Options
Renegotiate the price. The strongest option when it works, and it works more often than buyers expect: the seller’s next buyer will likely face the same appraisal. Leverage depends on the market and on whether the seller has a deadline of their own.
Split the difference. A common resolution — the seller reduces by part of the gap and you cover the rest. It keeps the transaction alive without either side absorbing the whole shortfall.
Pay the gap in cash. Viable if you have reserves, but check what it leaves behind. Draining reserves to close can jeopardise the approval itself, since many programs require post-closing reserves — and it leaves nothing for the escrow increase that typically arrives in year two.
Increase your loan-to-value ratio. Instead of adding cash, borrow a higher percentage of the appraised value. Going from 80% to 90% of $400,000 gives you a $360,000 loan — but under 20% equity means mortgage insurance, which is a permanent monthly cost rather than a one-time one. Compare the two using our mortgage calculator and our breakdown of how mortgage insurance is priced.
Walk away. Available only if your contract has an appraisal contingency. If it does, you recover your earnest money. If you waived it, walking away typically means forfeiting that deposit.
What an Appraisal Gap Clause Commits You To
In competitive markets, buyers add an appraisal gap clause to strengthen an offer. It promises that if the appraisal comes in low, you will cover the difference up to a stated amount — commonly $10,000, $20,000 or more.
Two things about it deserve attention before you sign one. It is a binding cash commitment, not an expression of intent: if the gap materialises, the money is due, and there is no financing route around it because the lender’s limit is precisely what created the gap. And it does not remove your appraisal contingency unless the contract says so — if the shortfall exceeds your stated cap, you may still be able to renegotiate or exit, depending on how the two clauses interact.
The practical rule: never write a gap larger than the cash you can produce while still holding required reserves. Confirm what your program requires post-closing before you set the number, and sanity-check the whole picture with our affordability calculator.
When a Rebuttal Is Worth Trying
A reconsideration of value asks the lender to have the appraiser review the report. It succeeds when you can point to something factual and specific — not when you simply disagree with the conclusion.
Grounds that carry weight: comparable sales the appraiser missed, particularly recent ones closer to the subject property; factual errors in square footage, bedroom count, lot size or condition; or comparables that are genuinely not comparable, such as a distressed sale used against a move-in-ready home.
Grounds that do not: your opinion of value, the price you agreed, or the amount of money at stake. Your agent should assemble the comparables, since appraisers respond to sales data rather than argument. Success rates are modest, so pursue a rebuttal in parallel with negotiating rather than instead of it.
One timing warning: this all takes days you may not have. A rebuttal, a renegotiation and a reappraisal can each consume a week, and your rate lock is running throughout. If the lock expires mid-dispute you can lose the rate as well as the negotiation — our guide to what happens when a lock expires covers the cost of extending, and current rates are on our daily rates page.
The bottom line
- Lenders lend against the lower of price or appraised value, so the shortfall becomes a cash requirement.
- On a $420,000 purchase appraised at $400,000, a 20%-down buyer needs $100,000 instead of $84,000.
- Your options are renegotiate, split the gap, pay cash, raise your loan-to-value with mortgage insurance, or walk if you kept the contingency.
- An appraisal gap clause is a binding cash commitment — never write one larger than you can pay while holding required reserves.
- Rebuttals succeed on missed comparables or factual errors, not on disagreement with the value.
Frequently Asked Questions
What happens if the appraisal is lower than the offer?
Your lender caps the loan at a percentage of the appraised value rather than the contract price. You can renegotiate, cover the difference in cash, borrow a higher share of the appraised value with mortgage insurance, or exit if you have an appraisal contingency.
Who pays the appraisal gap?
The buyer, unless the seller agrees to reduce the price. Lenders will not finance above appraised value, so there is no financing route around the shortfall.
Can I get my earnest money back after a low appraisal?
Yes if your contract includes an appraisal contingency and you exercise it within its deadline. If you waived the contingency, walking away usually means forfeiting the deposit.
How often do appraisal rebuttals succeed?
Modestly. They work best when supported by specific missed comparable sales or factual errors in the report, and rarely when based on disagreement with the valuation itself.
Sources & further reading:
Consumer Financial Protection Bureau,
U.S. Department of Housing and Urban Development.
