Backup offers, explained

The short answer

A backup offer is an accepted offer that moves into first position if the current buyer’s deal falls apart. It costs little to submit and can get you a home without a bidding war, since a meaningful share of contracts fall through over inspections, financing or appraisals. Make sure your contract lets you withdraw before you’re promoted, so you can keep shopping.

How it works

The seller accepts another offer but agrees to yours as a backup, often on the same contract forms with a backup addendum.
If the first contract is canceled, yours becomes primary, usually after written notice.
Your deadlines (inspection, financing, closing) typically start when you’re promoted, not when you sign.

Try it: Backup offerEstimate how likely a home’s first contract is to fall through and what a backup offer should include.

When backup offers pay off

The first buyer’s offer had heavy contingencies, a sale contingency or a tight appraisal.
The home is older and the inspection may turn up issues.
The market is cooling and the first buyer may get cold feet.
You love the home and can wait.

Protect yourself

Keep the right to withdraw at any time before you’re promoted to primary.
Ask about your deposit: it’s often due only once you’re promoted.
Keep your financing ready: your pre-approval and rate plans should still work if you’re promoted weeks later; see the rate sensitivity tool.
Keep looking: treat it as a possibility, not a plan.

Price and terms

Offer what the home is worth to you, not just what you think the first buyer offered. If you’re promoted, the seller may be more willing to negotiate, especially if the first deal fell through over an inspection or appraisal problem. See the negotiation room tool and the appraisal gap calculator.

If you’re competing for a home now, see how to make a competitive offer and how offer rounds work.

Common questions

Is a backup offer binding?

It’s a contract, but you can usually withdraw before you’re promoted to primary if your backup addendum allows it.

Do I pay earnest money on a backup offer?

Often only once you’re promoted to primary; check your contract.

How often do home sales fall through?

A meaningful share do, most often over inspection issues, financing or appraisals, which is why backup offers can pay off.

Updated October 2026. Educational content. OfferBacked is not currently a lender and doesn’t issue pre-approvals or loans.