Purchase
Purchase contract

The purchase offer is binding: what buyers must know before signing

Why a purchase offer binds when buying property: offer and acceptance, the acceptance period, the distinction from record of main points and preliminary contract.

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16 June 2026 · Mag. Bernhard Brandauer, Rechtsanwalt

Many buyers sign a purchase offer at the estate agent or during a viewing in the belief that it is only a non-binding declaration of intent. That is a dangerous mistake. A written purchase offer is usually a binding offer to conclude a purchase contract. Whoever signs it is bound by it.

The consequence is far-reaching: if the seller accepts the offer within the acceptance period, the purchase contract comes into being, entirely without an additional signature under a long contract text. The buyer can then no longer simply withdraw and in the worst case owes damages or an agreed forfeit money.

This post explains from a lawyer perspective when a purchase offer binds, what role the acceptance period plays and how offer, written record of main points and preliminary contract differ. This way you know before signing what you are committing to.

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Answer one or two questions on signature, acceptance and the period. You receive an initial classification of your binding.

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01 Question 1

Have you already signed the purchase offer?

A written purchase offer is usually a binding offer to which you are bound for the duration of the acceptance period.

All paths at a glance

Overview of all answers.

01

Before signing you are not bound by anything.

As long as you have not signed the purchase offer, you are free. Use this phase to check the content: purchase price, property, acceptance period, conditions and any withdrawal clauses. With your signature you bind yourself for the duration of the acceptance period. A prior review of the offer protects you from a hasty commitment. An overview is given in our post on how to review a property purchase contract before signing.

Have the offer checked before you sign.

02

Through acceptance the purchase contract has already come into being.

If the seller accepted your offer in time, the purchase contract has validly come into being. You are now both bound. A unilateral exit is only possible through an agreed right of withdrawal, through forfeit money or through the statutory remedies. The available routes are explained in our post on withdrawal from a property purchase contract.

Have the next steps of the settlement accompanied by a lawyer.

03

You are bound by your offer until the period expires.

While the acceptance period is running, you are bound by your purchase offer. You cannot simply revoke it, because during this time the seller can bring the contract into being by mere acceptance. A revocation only works if it reaches the seller before or at the same time as the offer. Therefore check carefully whether the offer contains a withdrawal clause or a reservation.

Have your binding and possible ways out checked quickly while the period is running.

04

Without timely acceptance your offer has lapsed.

If the acceptance period has expired without the seller accepting, your offer lapses. You are then no longer bound. A later consent of the seller counts in law as a new offer, which you can now accept or reject. Make sure that a late acceptance does not unintentionally bind you again.

Record the expiry of the period and check any late response of the seller.

Why the purchase offer binds

Under Austrian law a contract comes into being through matching declarations of intent, that is through offer and acceptance. The purchase offer is the offer of the buyer. It is binding if it lays down the essential content of the future contract, in particular the property and the purchase price, and shows the intention to be bound. These basic rules of contract conclusion are found in the provisions on offer and acceptance in the Austrian Civil Code.

With the signature the buyer makes a binding declaration. He can no longer unilaterally withdraw it once it has reached the seller. A revocation only works if it reaches the seller before or at the latest at the same time as the offer. From receipt onwards the buyer is bound by his word for the duration of the acceptance period.

If the seller accepts the offer within the period, the purchase contract is concluded. A separate, fully drafted purchase contract is not strictly necessary for the contract to come into being. The fully drafted contract then only serves the precise settlement and the registration in the land register. What matters in this contract is shown in our post on how to review a property purchase contract before signing.

The acceptance period and the receipt of the declaration

The acceptance period determines how long the buyer remains bound by his offer. If a period is named in the offer, that period applies. If the seller accepts only after expiry, no contract comes into being, unless the buyer lets the late acceptance count against him. A late acceptance counts in law as a new offer.

If the offer contains no express period, the buyer is nonetheless bound for a reasonable time. How long this binding lasts depends on the circumstances of the individual case, for example the type of transaction and the usual time for reflection. For this reason alone every offer should contain a clear acceptance period so that both sides know where they stand.

For the binding what matters is receipt. The offer becomes effective as soon as it reaches the seller, and the acceptance becomes effective as soon as it reaches the buyer. Whoever cleanly documents the timing of offer, period and acceptance can later prove whether and when the contract came into being.

Distinguishing offer, written record of main points and preliminary contract

In practice several terms appear around the conclusion of a contract that have different legal consequences. The purchase offer is the binding offer of one party. If it is accepted, the purchase contract is concluded. The label as offer, purchase offer or purchase proposal changes nothing about the binding effect.

The written record of the main points is a written fixing of the main points of a transaction, that is above all the object and the price. If the parties agree on these main points and fix them in writing, the contract has already validly come into being, even if secondary points are still open. A signature meant as such a record can therefore already bind.

The preliminary contract is the obligation to conclude a main contract in the future. From it one party can demand performance, that is the conclusion of the main contract. The preliminary contract too therefore binds, even if in a different form than the immediately effective offer. Which type of contract is present in the specific case follows from the content of the declaration, not from its heading.

The terms compared

Offer, written record of main points and preliminary contract

These three forms meet buyers before the purchase. They bind differently but are all more than mere declarations of intent.

Comparison of purchase offer, written record of main points and preliminary contract by binding effect and legal consequence
Form What it means Binding effect
Purchase offer Binding offer of the buyer Binds until the acceptance period expires The contract arises with acceptance
Record of main points Written fixing of the main points Agreement on object and price suffices The contract is valid despite open secondary points
Preliminary contract Obligation to a later main contract Claim to conclusion of the main contract Performance can be demanded
Non-binding enquiry Mere expression of interest without intention to be bound No legal obligation No contract, free negotiation

What is decisive is the content of the declaration, not its label. Even an agreement on property and purchase price can be binding.

Caution with the purchase offer: Never sign a purchase offer in the belief that it is non-binding. With acceptance by the seller the purchase contract is concluded and an exit is only possible through an agreed right of withdrawal, forfeit money or the statutory remedies. Have the offer checked before signing. Booking an initial consultation (72 euro) can quickly bring clarity.

Consequences of the binding and how to protect yourself

Whoever wants to break free after the contract has come into being without legal grounds risks consequences. The seller can insist on performance or demand damages. If forfeit money is agreed in the offer, withdrawal against payment of this amount may be permitted. Which exit routes exist is dealt with in our post on withdrawal from a property purchase contract.

The most important protection lies before signing. Clarify the financing before you bind yourself, or include a financing condition in the offer. How such a condition is drafted is explained in our post on the financing condition and the condition precedent.

In addition, check the property itself before you submit an offer. Which encumbrances and rights are registered in the land register you recognise with the encumbrances and land register check. This way you do not bind yourself to a purchase whose risks you do not yet know.

Frequent questions

Purchase offer and binding effect.

Is a purchase offer really binding? +

Yes. A written purchase offer is usually a binding offer to conclude a purchase contract. It binds the buyer for the duration of the acceptance period. If the seller accepts in time, the purchase contract comes into being without a further signature being needed.

Can I withdraw a signed purchase offer? +

A revocation only works if it reaches the seller before or at the same time as the offer. If the offer has already been received, you are bound for the duration of the acceptance period. An exit is then only possible through an agreed withdrawal clause, forfeit money or the statutory remedies.

What happens when the acceptance period expires? +

If the acceptance period expires without the seller accepting, your offer lapses and you are no longer bound. A later consent of the seller counts in law as a new offer, which you can accept or reject.

Topics
Purchase offerContract conclusionAcceptance periodRecord of main pointsPreliminary contract

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