Thailand Sale and Purchase Agreement Guide: What Buyers Must Know

The Sale and Purchase Agreement (SPA) is the binding contract between you and the seller or developer. In Thailand, as elsewhere, the SPA is where price, risk, and remedies are defined. Signing without independent legal review is one of the most expensive mistakes foreign buyers make.

This guide explains what a strong SPA contains, what you should negotiate, which clauses deserve skepticism, and how a competent lawyer typically reviews the document in 7–14 days after reservation.

Why the SPA matters more than marketing brochures

Marketing materials describe lifestyle. The SPA describes legal obligations. If a promise is not in the SPA (or a clear specification schedule), it is not contractually enforceable.

For foreign buyers, the SPA is also the document banks and future purchasers examine when you exit. Clean, precise language reduces friction on resale.

Essential clauses every SPA should contain

Property description

The SPA must identify the property with zero ambiguity:

• Project name, tower or building, unit number, floor, and approximate area in square meters.
• Parking allocation and storage, if included.
• Shared percentage interest in the condominium if applicable.

Vague descriptions (“approximate area subject to final survey”) should be paired with a clear remedy if the delivered area differs materially.

Purchase price and payment schedule

Total price in Thai Baht (and whether VAT is included).

Payment schedule with dates or construction milestones. For off-plan, each installment should tie to an objective milestone — not just calendar dates with no linkage to progress.

Handover date and delay remedies

A fixed handover window or completion date, with:

• A defined penalty for late delivery — often discussed as a daily rate (commonly around 0.01% per day in developer templates, which buyers sometimes negotiate upward or supplement with cancellation rights after extended delay).
• A process for force majeure events — storms, supply chain issues — with reasonable documentation requirements.

Specification schedule

A schedule that lists finishes: flooring type, kitchen appliances, bathroom brand tier, window types, and air conditioning capacity. Without this attachment, “luxury finish” is meaningless.

Common area and juristic person

For condos, the SPA should reference:

• That the unit will be part of a registered juristic person.
• Buyer obligations for common area fees and sinking fund contributions.
• Voting rights and participation in the condominium’s governance.

Warranties and defects

Define defect liability periods — typically 12–24 months for workmanship issues in new builds — and a process for reporting and rectifying defects after handover.

Cancellation rights

Understand under what conditions either party may cancel. Developer-friendly SPAs sometimes allow broad developer cancellation while restricting buyer exit. Symmetry matters.

Force majeure definition

Force majeure should be specific — not a catch-all that excuses indefinite delay. Acceptable clauses list events (natural disasters, government orders) and require notice and proof.

What to negotiate

Delay penalty rate

If the template offers a minimal daily penalty, negotiate for:

• A higher daily rate, or
• A right to terminate and receive refund if delay exceeds 6–12 months beyond the agreed window (subject to legal advice on your specific SPA).

Specification lock-in

Attach a signed specification schedule. If the developer substitutes materials, the substitution should be equivalent or better, not arbitrary.

Defect warranty period

Push for clear defect periods and a process for snagging lists before final payment release.

Payment linkage

Ensure your final payment is not released until handover and satisfactory inspection — or that a meaningful retention is held until defects are cleared.

Red flags in developer SPAs

Red flag	Why it matters
Vague force majeure	Unlimited delay risk
No firm handover window	No planning certainty
Developer may substitute materials without equivalence	Downgrade risk
No meaningful penalty for late delivery	Weak incentive to finish on time
Broad developer termination rights	Asymmetric risk
Buyer penalties for late payment that dwarf developer penalties	Imbalanced contract
Missing foreign buyer quota confirmation clause	Title risk for foreigners

If several red flags appear together, treat it as a signal about the developer’s contracting culture — not only the document quality.

Review timeline: what happens in 7–14 days

Your lawyer should:

1. Compare SPA terms against Land Department records and marketing promises.
2. Flag ambiguous clauses and propose revisions.
3. Align payment schedules with construction progress and your bank’s transfer timing.
4. Confirm transfer tax allocation between parties (who pays which fee).

Never sign under pressure during a “today only” promotion. Serious developers allow time for legal review.

Independent lawyer vs developer counsel

The developer’s lawyer drafts the SPA to protect the developer. Your lawyer works for you. Independent review is not an insult to the seller — it is standard practice in professional transactions.

Related guides

• Buying property in Phuket — complete guide
• Do I need a lawyer to buy property in Thailand?
• Phuket property due diligence checklist

Frequently Asked Questions

How long should I allow for SPA review in Thailand? +

Plan for 7–14 days for a thorough review and negotiation round. Rush reviews miss cross-references between the SPA and specification schedules. If the developer pressures same-day signing, treat it as a warning sign.

Can I negotiate the SPA with a Thai developer? +

Yes, especially on delay penalties, specification schedules, and payment milestones. Developers vary — some accept reasonable amendments, others refuse. Your lawyer advises what is realistic for that counterparty.

What if the SPA is only in Thai? +

Request an English version for your understanding, but confirm which language governs legally. Many contracts specify Thai as controlling. You should still have bilingual counsel explain obligations before signing.

Is the reservation agreement the same as the SPA? +

No. The reservation is typically a short preliminary agreement to hold the unit. The SPA is the full contract governing price, payment, and remedies. Always review the SPA before non-refundable payments.

What happens if I sign a bad SPA? +

You may be locked into unfavorable payment terms, weak delay remedies, or unclear specifications. Remedies after signing are limited and expensive. Prevention through legal review is far cheaper than litigation.