Today's buyer is tomorrow's seller. Subject-to-sale transactions work best when both sides understand the other's position and the trade-offs involved.
This guide covers what subject-to-sale offers mean, how time clauses work, and the trade-offs each party is taking on. Both buyer-specific and seller-specific sections are labelled. Use the navigation above to jump to any section.
A subject-to-sale offer means the buyer's purchase is conditional on successfully selling their current home first. The deal does not become firm until that condition is satisfied or removed.
The buyer's purchase depends on selling their existing home. Until that happens, the deal is not firm and the contract includes exit provisions for both parties.
This type of condition protects the buyer from carrying two mortgages simultaneously — a meaningful safeguard, especially when markets are uncertain or the buyer's home has not yet sold.
Coordinating the sale of one home with the purchase of another introduces logistical complexity. Timelines rarely line up perfectly and require active management by both sides.
When a seller accepts a subject-to-sale offer, a time clause is commonly included. This can protect the seller from being tied up indefinitely while the buyer waits for their home to sell.
Seller accepts the subject-to-sale offer and continues marketing the property.
A second offer comes in from a new buyer that is unconditional or stronger.
Seller notifies the original buyer, who typically has 48 hours to decide — though the notice period is a negotiated term in the contract.
Option A: Original buyer removes the subject-to-sale condition. The deal becomes firm.
Option B: Original buyer cannot proceed. They withdraw, and the seller may accept the new offer.
A subject-to-sale condition offers meaningful financial protection — but it comes with trade-offs in competitiveness and timeline certainty.
Protects against carrying two mortgages simultaneously.
Allows the buyer to sell their current home at a fair price rather than accepting a rushed or discounted offer.
Reduces pressure around interim housing, rushed timelines, and short-term rental costs.
Sellers typically prefer certainty. A conditional offer is commonly viewed as weaker than an unconditional one at the same price.
If the seller receives a better offer, the original buyer typically has a short window — often 48 hours — to decide, often without their home sold yet.
To compensate the seller for added uncertainty, subject-to-sale offers commonly need to be priced above what a clean, unconditional buyer would offer.
Due diligence costs can be incurred before the sale of the buyer's home closes.
Accepting a subject-to-sale offer means absorbing additional uncertainty in exchange for a potential sale — a trade-off that looks different depending on market conditions.
Opens the listing to buyers who have not yet sold their existing home.
Can help maintain momentum for properties that have been sitting on the market.
A time clause allows the seller to continue marketing and potentially accept a stronger offer if one arrives.
The deal remains conditional until the buyer's home sells — timelines can be unpredictable.
The property may appear under offer during the waiting period, which can deter other serious buyers.
If the buyer struggles to sell, they may return requesting a price reduction.
A subject-to-sale offer asks the seller to absorb additional risk. The more certainty a buyer can demonstrate, the less that uncertainty typically needs to be compensated through price.
A strong price and favourable terms can compensate the seller for the uncertainty the condition creates.
A firm, credible timeline is a common way buyers build confidence with sellers in this type of transaction.
Including the time clause proactively can signal an understanding of the seller's position — it is a common feature of well-structured subject-to-sale offers.
If the seller receives another offer, the original buyer typically has a short window to respond — having a plan in place before that scenario arises is common practice.
Sharing listing details and early showing activity where appropriate can support the buyer's credibility with the seller.
Subject-to-sale offers can carry additional risk when property values are falling — considerations worth reviewing before structuring this type of offer.
Depreciation during the waiting period can reduce equity and purchasing power by the time the condition is removed.
Fewer active buyers can mean it takes longer to sell, making agreed deadlines harder to meet.
Reductions to the buyer's home affect net proceeds and can impact the purchasing budget for the new property.
Lenders may reassess values during the waiting period, which can affect approvals and borrowing capacity.
As markets soften, sellers may become less willing to wait for conditional offers to resolve — time clause triggers may come sooner than expected.
In a falling market, the risk of accepting a conditional offer can be amplified — considerations worth weighing before accepting.
If the buyer withdraws after a waiting period, the seller's property may now be worth less than when the offer was originally accepted.
Every week waiting is a week of potential value erosion in a declining market.
Finding an alternative buyer can be more difficult if a conditional deal collapses in a softening market.
If the deal falls apart, subsequent offers may reflect lower current market values rather than the price originally agreed to.
Mortgage, taxes, insurance, and maintenance continue to accumulate while the property remains unsold.
The more certainty a buyer can demonstrate going in, the stronger the overall offer position tends to be.
Overpricing the current home can undermine a conditional offer quickly — a realistic list price signals credibility to the seller.
A firm date for the subject-to-sale condition gives the seller a defined timeline rather than open-ended uncertainty.
Compensating for the uncertainty through price, dates, and conditions is a common approach in this type of transaction.
Including this provision proactively is common practice — it protects the seller and can keep the overall offer more credible.
Listing details and agent information are commonly shared to support the buyer's position.
Pre-approval demonstrates readiness to act once the existing home sells.
Keeping the seller updated on the progress of the buyer's sale is common practice and helps maintain goodwill during the conditional period.
Consulting a lawyer and real estate professional to review timelines, exit terms, and the time clause wording before signing is advisable.
The more risk a seller is absorbing, the more it is reasonable to expect in return — in price, terms, and the structure of the agreement itself.
An unlisted or overpriced home is a common consideration — it can suggest the buyer's sale timeline may be longer than stated.
Typical days on market in the buyer's area is one factor in assessing whether the proposed sale deadline is realistic.
A conditional offer at the same price as an unconditional offer can be difficult to justify — the risk differential is a common negotiating consideration.
A time clause protects the seller's ability to continue marketing and accept a stronger offer — this is a commonly negotiated feature of subject-to-sale agreements.
A defined cadence for showing activity and progress updates is common practice during the conditional period.
Pre-approval, active showings on the buyer's home, and realistic pricing are all indicators worth reviewing.
Whether conditional offers are more or less attractive depends heavily on local demand and the direction values are moving.
Consulting a lawyer and real estate professional to review terms, the time clause wording, and exit provisions before signing is advisable.
Subject-to-sale offers can work when both sides understand what is being exchanged. Buyers are asking for patience and risk tolerance. Sellers are providing it. Terms commonly reflect that clearly in price, timelines, and communication arrangements.
More certainty from the buyer can mean a stronger offer. More conditions typically mean greater compensation is expected.
Clear timelines and proactive updates are common features of subject-to-sale transactions that proceed smoothly.
A real estate professional, mortgage advisor, and lawyer each play a role in reviewing terms, risks, and the wording of conditions.