Short answer
The irrevocable period is the time during which the party making the offer promises to keep it open. It affects when the other side can accept and when the offer expires. Do not choose the time mechanically; it should allow proper delivery and review without leaving the buyer unnecessarily exposed.
The problem the buyer is trying to avoid
A buyer signs late at night with a long irrevocable period, then finds another property or notices a mistake but cannot assume the offer can be withdrawn. Counteroffers also change who is making the open offer.
A practical Ontario example
Illustration only: A buyer submits at 7 p.m. with an irrevocable time of noon the next day, even though the seller is reviewing offers at 8 p.m. The extra time provides no strategic benefit and limits the buyer longer than intended. The Realtor should explain the seller’s process and recommend a time that matches it.
Questions to ask before signing or waiving
- When and how will the seller review offers?
- Who needs time to sign or obtain advice?
- What happens if acceptance arrives late?
- Does a counteroffer end the original offer?
- Are notice and electronic-delivery details correct?
Practical routes to compare
- Set the shortest reasonable period that supports the negotiation plan.
- Read every counteroffer as a new legal decision.
- Correct names, dates and delivery details before signing, not after acceptance.
Separate the offer from the mortgage approval
The Realtor advises on the offer and negotiation; the lawyer interprets legal wording and consequences. Rajiv checks borrower qualification, property acceptability, appraisal exposure, closing cash and lender conditions. A signed offer cannot require a lender to approve the borrower, property or price. An A lender is generally the first route when the complete file fits. Alternative lenders can consider broader income, credit or property situations at higher cost. MIC or private lending can sometimes bridge a short-term problem, but only where cost, equity and a realistic exit make sense.
Verified public guidance
An offer and counteroffer are contractual documents. The stated irrevocable time and delivery terms matter to acceptance; buyers should obtain legal advice about withdrawal, late acceptance or disputed delivery rather than relying on assumptions.
Read the primary source. Source checked 2026-09-03. RECO and CAO provide public consumer guidance; the agreement, lawyer’s advice and each lender’s current policy decide the individual file.
Pressure-test the recommendation
Ask what would make the advice fail. A condition may be too short to obtain an appraisal, the approval may still require documents, the property may be unacceptable, the buyer’s funds may be inaccessible, or the clause may not protect the issue the buyer assumes it covers. Confirm the deadline, who must be satisfied, what notice is required and what happens if the condition is not waived. Verbal reassurance should never replace the written clause, the lender’s remaining conditions or the buyer’s own ability to carry the financial risk.
Documents to have before the deadline
- Complete offer, schedules, amendments and notices
- MLS listing, property documents and comparable sales
- Mortgage approval with every outstanding condition
- Deposit and 90-day down-payment history
- Inspection, status certificate, appraisal or specialist reports when applicable
- Written lawyer, lender and Realtor explanations of unresolved risks
Related AskRajiv guidance
Continue with how competing offers work ontario buyer, buyer offer confidentiality competing offers pressure ontario.
Get a mortgage strategy review before becoming firm
Use Rajiv’s direct mortgage strategy form. Include the offer deadline and the concern you cannot afford to discover after acceptance.
Source and review
Reviewed by Rajiv Verma, Mortgage Broker on 2026-09-03. Educational information only; not legal, real-estate, inspection, appraisal, tax or mortgage approval advice.