HomeLife Frontier Realty Inc., Brokerage Joonghyun Ahn, Sales Representative

Group: Buying and selling process

Counter-offer (sign-back)역제안 (사인백)

In one sentence

Sending an offer back with changed terms (price, dates, conditions) instead of accepting it as it is. A counter-offer ends the original offer and starts a new one with its own deadline for the other side to accept.

Last checked Oct 31, 2026

What is it?

A counter-offer is when the side that receives an offer (a written proposal to buy) says "not as written, but I will if you change this", and sends it back with changed terms. Ontario agents usually call it a sign-back, because the changed offer is signed and sent back.

Usually the seller signs back the buyer’s offer, but the buyer can also sign back the seller’s counter-offer. It goes back and forth until both sides sign the same terms.

Price is not the only thing that can change. The closing date, the deposit, the deadlines of conditions (financing, home inspection), included items (fridge, light fixtures) and the irrevocable time can all be countered.

How is it done in practice?

In Ontario, offers are usually written on the OREA (Ontario Real Estate Association) standard form (Form 100), and the sign-back is made on that same paper or electronic document. The common way is below. Confirm the exact steps and wording in the contract you sign and with your agent.

  1. Strike out the term you want to change (for example, the price $950,000) and write the new one (for example, $975,000).
  2. The person making the change initials each changed spot. If the other side accepts, they initial the same spots. A change becomes part of the contract only when both sides have initialled it.
  3. Write a new irrevocable time: "this counter-offer is open for acceptance until <date and time>". If the other side does not accept by then, the counter-offer expires.
  4. Sign it and send it to the other side’s agent. The law (the TRESA regulation) requires agents to pass on written amendments to offers to their client as soon as possible, just like the offer itself.
  5. If the other side signs it as is within the time, you have a contract. If they change something again, that is a new counter-offer with its own new irrevocable time.

In electronic signing systems a new version may be issued instead of strike-outs. Either way, check every change, one by one, before you sign.

What does it mean legally?

Under the general rules of contract law, a counter-offer rejects the original offer and makes a new one. So the moment the seller sends back $975,000, the buyer’s original $950,000 offer is gone. If the buyer rejects the counter, the seller cannot later say "fine, I accept your $950,000". A new offer has to be written.

A contract is formed when one side accepts the other side’s latest offer (or counter-offer) without changes, within its irrevocable time, and that acceptance is communicated to the other side. Until then, nobody is bound. The contract usually also says how and by when acceptance must be communicated, so check it.

This is the general principle. Ask a real estate lawyer how it applies to your situation.

How many rounds are there?

There is no limit. Sometimes one round settles it; sometimes there are three or four. But remember that every counter-offer carries a new deadline, and during that time the other side can keep looking at other homes (or other buyers).

RECO (the regulator of real estate agents in Ontario) warns sellers that a seller may keep negotiating only to find that the offer was already the best the buyer could present, while the other buyers have found new homes.

Irrevocable times on sign-backs are usually short, a few hours to about a day, so the receiving side cannot hold your offer while negotiating with someone else. There is no fixed rule, so decide with your agent.

In a multiple-offer situation

When several offers come in, the seller can sign back one of them, or ask some buyers to improve and resubmit. The seller decides, with the agent’s advice.

Signing back two buyers at the same time risks being bound to two contracts if both accept. That is why sellers normally sign back only one buyer at a time. This is practice, not law, so sellers should confirm with their agent and lawyer.

As a buyer: a sign-back means the seller is interested in your offer. But the deadline is short, so decide quickly and stay within your budget.

Strategy in plain words

  • Decide how far you can go before you write the first offer. Then a counter-offer will not rattle you.
  • Look beyond price. Matching the other side’s closing date or shortening a condition period can matter as much to them as money.
  • Check every change in every round. People sometimes find that the included items or the closing date changed along with the price.
  • A verbal promise is not a contract. Even if your agent reports that "the seller said this price is fine", nothing is settled until the signed sign-back comes back. The law requires agents to use best efforts to make sure real estate agreements are in writing.
  • Do not miss the deadline. Irrevocable times on sign-backs run through weekends and holidays. If the time passes before you answer, the counter-offer is gone and the other side is free to deal with someone else.

What to watch for

  • Initials from both sides: a change initialled by only one side is not agreed. Check every changed spot before the final signature.
  • Get a copy: once the contract is formed, you should receive a copy of the final version signed by both sides. Agents must use best efforts to make sure every party gets one.
  • Condition deadlines in a conditional offer may stay the same or move during the sign-backs. Count the days again on the final version.
  • If you offer on another home while a sign-back is pending, you could end up bound to both. Finish one before you start the next.

Example

Example

A North York condo is listed at $699,000. The buyer offers $680,000, closing in 60 days, with a 5-day home inspection condition, irrevocable until 11 p.m. tonight. The seller strikes out the price and writes $692,000, changes closing to 45 days, initials both spots, writes a new irrevocable time of 6 p.m. tomorrow, and signs it back. At that moment the buyer’s $680,000 offer is gone.

The buyer accepts $692,000 but needs 60 days to close. So the buyer changes only the closing back to 60 days, initials it, sets the irrevocable to 10 p.m. tomorrow and sends it back (a second counter-offer). That evening the seller initials the change and signs, and when the buyer’s agent receives it, the contract is formed. Both sides receive the final copy the next day.

What the law and official sources say

Quotes are copied word for word. The "In plain words" lines are our explanation, not an official translation.

TRESA General Regulation — Amendments to offers must be conveyed tooO. Reg. 567/05 (General), s. 22.10 (5) (a)
Subsections (1) to (4) also apply, with necessary modifications, to, (a) written amendments to written offers and any other written document directly related to a written offer;

In plain wordsThe duty to pass a written offer to the client as soon as possible also applies to written amendments such as counter-offers and any document directly related to the offer.

Source: ontario.ca/laws/regulation/050567 · checked Oct 30, 2026

TRESA General Regulation — Written and legible agreementsO. Reg. 567/05 (General), s. 13.2
A registrant who represents a client in respect of a trade in real estate shall use best efforts to ensure that any agreement that deals with the conveyance of an interest in real estate is in writing and that the written agreement is legible.

In plain wordsAgents must do their best to make sure a real estate purchase agreement is in writing and legible. A verbal deal is not something to rely on.

Source: ontario.ca/laws/regulation/050567 · checked Oct 30, 2026

TRESA General Regulation — Copies of agreementsO. Reg. 567/05 (General), s. 13.3 (1)
If a registrant represents a client who enters into a written agreement that deals with the conveyance of an interest in real estate, the registrant shall use best efforts to ensure that all parties to the agreement receive a copy of the agreement as soon as possible after the agreement is entered into.

In plain wordsOnce the agreement is made, the agent must use best efforts to get a copy to every party as soon as possible. Make sure you receive the final version after the sign-backs.

Source: ontario.ca/laws/regulation/050567 · checked Oct 30, 2026

Trust in Real Estate Services Act, 2002 — Offers in writingTrust in Real Estate Services Act, 2002, S.O. 2002, c. 30, Sched. C, s. 35.1 (1) (a)
No registrant shall, (a) while acting on behalf of a purchaser, present an offer to purchase real estate except if the offer is in writing;

In plain wordsAn agent acting for a buyer may present an offer only in writing. A price said only out loud cannot be presented as an offer.

Source: ontario.ca/laws/statute/02r30 · checked Oct 30, 2026

RECO — Dealing with competing offers (information for sellers)Real Estate Council of Ontario, "Dealing with competing offers", Tips for sellers
Even in a competing offer situation, buyers have other options and may choose not to continue to participate. A seller may attempt to negotiate only to find out that it was the best offer the buyer could present. In the meantime, other buyers have found new properties they are interested in.

In plain wordsIf a seller pushes for more, the offer may turn out to have been the buyer’s best, and the other buyers may have moved on to other homes in the meantime.

Source: reco.on.ca/consumers/information-for-sellers/dealing-with-competing-offers/ · checked Oct 30, 2026

Common questions

Do I have to respond to a counter-offer?

No. It simply expires when its irrevocable time passes. Telling the other side you are not interested lets them plan their next step. If you want to keep negotiating, send your own counter-offer before the deadline.

Can the seller sign with someone else after sending me a counter-offer?

Until you accept, sign and your acceptance is communicated, there is no contract. What the seller may do can depend on the contract’s wording and the situation, so if you intend to accept, sign and send it right away, and ask a lawyer about the details.

I rejected the counter-offer. Can we go back to my original offer?

As a general rule, the original offer disappeared the moment the counter-offer was made, so you need to write a new offer. The other side may have changed their mind in the meantime.

What else can be countered besides the price?

The closing date, the deposit amount and timing, condition deadlines, included and excluded items, and the irrevocable time: almost everything in the contract. Meeting what matters to the other side can settle a deal without moving on price.

Can sign-backs be done with electronic signatures?

Electronic signing of real estate agreements is widely used in Ontario. Whatever the method, confirm that every change is acknowledged by both sides and that you receive a copy of the final version. Ask your agent and lawyer about the specific requirements.

Guides that use this term

Sources checked

  1. O. Reg. 567/05: General (TRESA regulation) ss. 13.2, 13.3, 22.10 (e-Laws) · checked Oct 30, 2026
  2. Trust in Real Estate Services Act, 2002, s. 35.1 (e-Laws) · checked Oct 30, 2026
  3. RECO, Dealing with competing offers (information for sellers) · checked Oct 30, 2026
  4. RECO Bulletin 4.3 Managing a pre-emptive offer (short irrevocable periods) · checked Oct 30, 2026
  5. OREA Standard Forms page (Form 100 itself is members-only) · checked Oct 30, 2026