By Prerna Kapoor, CLHMS | REAL Brokerage | May 19, 2026
Quick answer: A backup offer is a secondary contract that automatically becomes the primary contract if the first deal collapses. Colorado uses a specific addendum to make it official, and once signed, the backup buyer puts their earnest money up too. Backup offers can protect a seller from a re-listing nightmare, but they only work in your favor if the backup buyer is genuinely qualified and the primary contract has real reasons to wobble.
I had a seller in Lone Tree last spring who got a great primary offer with weak financing. The buyer was using a lender I had never heard of, putting 5 percent down, and asking for a 21-day inspection period. Two days after we went under contract, a second buyer toured the home and wanted to write. We accepted a backup. Three weeks later, the primary buyer’s financing fell apart on the appraisal. We were back under contract with the backup buyer within four hours, closed 27 days later, and never had to put the home back on the market.
That is when backup offers work. Here is everything you need to know before you say yes to one.
What a backup offer actually is in Colorado
In Colorado, a backup offer is a fully executed contract that sits in second position. It is not a verbal promise or a written letter of intent. It uses the Colorado Real Estate Commission’s standard Contract to Buy and Sell Real Estate with the Addendum to Contract to Buy and Sell Real Estate (Backup Position) attached.
The addendum spells out the rules. The backup contract is contingent on the primary contract terminating. Until that happens, the backup buyer cannot demand the home. But the moment the primary contract dies, the backup buyer is automatically moved into the primary position with all the same deadlines starting fresh from the date of conversion.
The backup buyer commits earnest money the moment the addendum is signed. Their money goes into escrow at the title company just like a primary buyer’s would. They are not just waiting around in the abstract. They have skin in the game from day one.
The key thing sellers often miss: as the seller, you cannot force a backup buyer to wait. They can terminate their backup contract at any time, for any reason, until they become primary. So if they find another home they like better next week, they can walk and you get nothing.
The risks sellers underestimate
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Backup offers sound like pure upside. They are not. Here are the real risks.
Your primary buyer gets discouraged. The primary buyer has no legal duty to be told there is a backup, but smart listing agents often hint that there is interest behind. The intent is to push the primary forward, but it can backfire. Some buyers feel pressured, get defensive, and start looking for reasons to terminate themselves. If you have a primary buyer who is on the fence, putting a backup behind them can be the thing that tips them out.
Your backup walks while you wait. The backup buyer is shopping the entire time. If they find a better home, a better price, or a deal where they are not waiting on someone else, they are gone. Now you have one buyer left, and that buyer might be the shaky one you took the backup against in the first place.
Mandatory transparency. Under Colorado Real Estate Commission rules, your listing agent has duties of honesty to all parties. If the backup buyer asks whether the primary contract is shaky, your agent cannot lie. The agent can decline to discuss specifics, but they cannot affirmatively mislead. This limits how much you can use the backup as a pressure tactic.
Dual-tracking confusion. Two sets of contingency deadlines, two earnest money checks, two inspection objection windows in your future if the primary dies. It is more paperwork, more communication, more chances for something to slip.
When a backup actually makes sense
Backup offers earn their keep when the primary contract has real reasons to fail. Watch for these signals from your primary buyer:
Low down payment relative to the price point. Five percent down on a luxury home is a different risk than 25 percent down. The lower the down payment, the more sensitive the deal is to appraisal gaps and rate changes.
Unfamiliar lender. I am not snobby about lenders, but I do want to see someone established in Colorado who can talk to my buyer’s agent and underwriter on day one. A lender nobody in the local title and escrow community has heard of is a yellow flag.
Long contingency periods. A 21-day inspection period in a market that is normally 7 to 10 days means the buyer is leaving themselves a lot of room to back out. They may not need it, but the option is there.
Sale of another home contingency. Even when the buyer says their current home is already under contract, that contract can fall apart and yours falls apart with it.
Aggressive seller concessions. If your primary buyer is asking for $15,000 in closing cost help on a $500,000 home, they may be stretched financially.
If your primary buyer has 20 percent down, a major bank or local credit union, no contingencies on selling another home, and a normal inspection window, a backup offer is mostly noise. You are unlikely to need it and you risk losing both buyers.
How to vet a backup buyer before you accept
If you decide to take a backup, treat the backup buyer with the same scrutiny you would have given a primary. The fact that they are second does not mean their offer is less important to verify. I tell my sellers to ask for the same things every time:
Pre-approval letter, not pre-qualification. There is a real difference. A pre-approval letter means the lender has actually reviewed income, assets, and credit. A pre-qualification is more of a verbal estimate.
Proof of funds for the down payment. A recent bank statement or investment account statement showing the buyer has the cash on hand.
A realistic offer price. A backup at 15 percent below your list price is not a backup, it is a fishing expedition. If the primary dies, you do not want to be locked into a bad deal just because you have a contract in hand.
Reasonable contingencies. The backup should look like a normal Colorado contract. If the backup buyer is asking for 30 days of inspection contingency and a $1,000 earnest money deposit on a $750,000 home, that is not a serious buyer.
A backup buyer’s agent who knows the local market. Backup contracts are unusual enough that you want both sides to have agents who have done them before. If the backup buyer’s agent is confused about how the addendum works, that is a sign of friction to come.
The communication plan once you have a backup
Once a backup is signed, the work is in how you manage both relationships. Here is what I tell my sellers to do:
Tell the primary buyer there is a backup, but do not weaponize it. The point is to communicate that there is healthy interest in the home. Not to threaten or pressure. Something like, “We have a backup offer in place, so we are committed to moving forward with you on the contract terms we have.” That is enough.
Keep the backup buyer warm with weekly updates. Not specifics about the primary, just general status. “We are still under contract, inspection objection deadline passed cleanly, appraisal is scheduled for next week.” This keeps them feeling like part of the process rather than forgotten.
Have your title company and lender ready to move fast if the primary dies. The conversion from backup to primary moves quickly under the addendum. Within 24 to 48 hours of termination, the backup becomes primary with fresh deadlines. You do not want to lose momentum because nobody is ready to start the new inspection period.
Document everything. Every conversation, every text, every email. If a dispute comes up later about who knew what and when, the paper trail protects you.
If you are thinking about selling and want to talk through whether a backup offer strategy makes sense for your specific situation, I am happy to walk through it. The decision depends a lot on the strength of your primary buyer, the price point of your home, and how much your local market is moving. There is no universal right answer. There is just the right answer for your deal.
Prerna Kapoor | REALTOR® | Luxury Home Specialist
REAL Brokerage | 720-949-5450 | info@prernakapoor.com
CLHMS • RENE • PSA • ABR | International Sterling Society Award Winner
Prerna specializes in residential real estate across Parker, Aurora, Lone Tree, Castle Pines, Highlands Ranch, Cherry Creek, Greenwood Village, and Centennial. She speaks English, Japanese, and Hindi.
