Off-Plan Payment Schedules in Thailand: How Installments Work and What Triggers Payments
Thailand off-plan payment schedules: typical 30/20/20/20/10 structure. What triggers each payment, what happens on developer delays, and how to protect yourself in the SPA.
Off-Plan Payment Schedules in Thailand: How Installments Work and What Triggers Payments
Off-plan purchases are cash-flow schedules disguised as property sales. The common 30/20/20/20/10 structure means 30% at contract, then 20% chunks tied to construction milestones, with 10% at transfer. Variations like 30/70 reduce complexity but increase late-stage concentration. Your protection is not “trust”—it is SPA definitions: what constitutes foundation complete, what evidence counts, and what happens if the developer runs late.
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Milestone mechanics: what “triggers” really means
| Milestone | Typical evidence |
|---|---|
| Foundation | Engineer/developer certificate + photos |
| Structure | Frame completion inspection |
| Fit-out | Interior milestone definitions |
Do not accept vague language like “when developer decides.”
Delay penalties: what strong SPAs reference
Many SPAs discuss late completion penalties in the range of roughly 0.01–0.025% of purchase price per day after a defined completion date—not universal, but a negotiation anchor.
| Purchase price | 0.02%/day on $300,000 |
|---|---|
| Per day | $60/day |
If the buyer misses a payment
Developers commonly allow a grace window (e.g., 30 days) then impose penalties or pursue termination—exact terms vary. Treat deadlines as real.
Assignment before completion: fees and consent
Some projects allow assignment to another buyer before final transfer, often with developer consent and a 2–5% fee—confirm early if exit flexibility matters.
| Item | Typical question |
|---|---|
| Assignment fee | 2–5% (varies) |
| Consent | Developer approval required |
Variations: 10/10/10/10/60 and others
Some schedules front-load smaller payments; others concentrate late. The “best” schedule depends on developer risk and your liquidity.
| Schedule | Cash-flow shape |
|---|---|
| 30/70 | Fewer payments |
| 10/10/10/10/60 | More frequent checkpoints |
Protecting yourself: lawyer-led checklist
- Define milestones with objective criteria
- Escrow / project accounts (where used) understood
- Default/remedies for both parties
- FET alignment for foreign freehold funding
Construction inspection rights: know if you have them
Some SPAs include buyer inspection rights at milestones; others do not. If you cannot verify construction, you rely entirely on developer reputation.
| Right | Value |
|---|---|
| Milestone inspection | Higher confidence |
| No inspection | Reputation only |
Developer refunds: what contracts actually say
If the developer fails to meet standards, refund clauses may exist—but timing and deductions vary. Read termination sections carefully.
Bank guarantees and escrow: project-dependent
Some markets use escrow accounts more formally than others. Thailand projects vary—ask, don’t assume.
Payment plan vs construction progress: mismatch risk
If you pay fast but construction is slow, your leverage can shrink. Strong contracts align cash out with verified progress.
Practical cash planning: keep tranche liquidity
Maintain liquid cash for the next milestone 30–45 days early—wires can delay.
Table: example milestone amounts on $350,000 (30/20/20/20/10)
| Stage | Amount |
|---|---|
| SPA | $105,000 |
| Next | $70,000 |
| Next | $70,000 |
| Next | $70,000 |
| Final | $35,000 |
Foreign buyer note: each tranche and FET
Coordinate each inbound transfer with your lawyer so cumulative documentation supports final registration.
Deep dive: reading a milestone schedule like a project finance analyst
When you buy off-plan, you are effectively funding a construction project with personal cash and limited recourse compared to a bank. That means your payment schedule should be read like a draw schedule: each installment should be tied to observable progress, not vibes. If a milestone says “structure complete,” ask what independent evidence is acceptable—developer letter only, engineer certificate, or third-party inspection. If the SPA only says “developer confirms,” your leverage is weaker.
Phuket’s market includes both large listed developers and smaller boutique builders. Larger developers may publish construction updates and maintain investor relations channels; smaller developers may be fine—but diligence must be heavier. Use site visits when possible, and compare marketing renders to site photos monthly.
Practical cash-flow pacing: why you keep a milestone buffer
Assume your next installment is $70,000 due in 45 days. You should have liquidity in place 30 days early because international wires can slip for compliance reasons unrelated to you. If you fund on the due date, you risk defaulting while your money is mid-air. A simple rule: fund the next milestone as soon as the previous milestone is verified, not “when the due date approaches.”
Penalty math: what 0.02%/day really means on Phuket price points
| Price | 0.02%/day | Per month (~30d) |
|---|---|---|
| $250,000 | $50/day | ~$1,500 |
| $400,000 | $80/day | ~$2,400 |
Penalties are not “optional philosophy”—they are cash. If your SPA has penalties, also check whether developer delays carry equivalent buyer protections.
Assignment strategy: when you might exit before completion
Some investors buy early tranches and later assign the contract if pricing moves. Assignment fees (often 2–5%) can still be cheaper than closing costs on a resale—sometimes. But assignment requires developer consent and a willing buyer. Treat assignment as optionality, not a guarantee.
Foreign buyer funding: align FET tranches with milestones
Each inbound transfer should be purpose-labeled consistently and mapped to FET issuance. If your SPA has five large tranches, you should have five clean bank stories—not one messy chain.
Final takeaway
Payment schedules are not “payment plans.” They are risk allocation between you and the developer. The stronger the milestone objectivity, the more sleep you keep.
Appendix: what to ask about “force majeure”
Contracts sometimes discuss delays from weather, supply chains, or permitting. Understand whether buyer protections remain meaningful if delays extend.
Appendix: site visit cadence for serious off-plan buyers
| Stage | Visit goal |
|---|---|
| Early | Foundation credibility |
| Mid | quality checks |
| Late | finishing quality |
Appendix: closing takeaway
Milestones should be observable, not poetic.
Supplement: what to do if milestones look “too fast”
If payments accelerate relative to visible construction, ask why—and escalate legally early.
Supplement: closing paragraph
A good schedule matches verified progress—full stop.
Final expansion: what to ask about “buyer default”
Understand grace periods, penalties, and whether the developer can terminate and forfeit deposits. These clauses are emotionally painful—read them calmly before signing.
Final expansion: closing
Milestones protect you only if contracts are specific.
Supplement: what to do if milestones look “too easy”
If milestones trigger without evidence, you are not buying construction progress—you are prepaying faith. Ask for objective verification every time.
Supplement: closing paragraph
A good schedule matches verified progress—full stop.
Supplement (long-form): what to do when a milestone is disputed
If the developer claims a milestone is complete and you disagree, your SPA should define dispute resolution: independent inspection, third-party engineer, or a defined arbitration path. Without this, you are negotiating from weakness after you have already paid. Keep emails factual, photograph everything, and route communications through your lawyer when stakes rise. A $70,000 installment is not the moment for casual texting.
Supplement: table of evidence types
| Evidence | Strength |
|---|---|
| Third-party engineer report | High |
| Developer letter only | Lower |
Supplement: closing
Milestone disputes are expensive—contracts exist to reduce ambiguity before money moves.
Final note (disclaimer)
This guide is for education and budgeting, not legal advice. Payment schedules, penalties, and developer practices vary by project and change over time—always confirm milestone definitions, remedies, and funding requirements with independent counsel before you sign or send money.
Review milestones like an investor—not a tourist
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Frequently Asked Questions
A commonly discussed structure is 30/20/20/20/10 tied to construction milestones, but developers use many variations including 30/70.
Contracts should define milestones with evidence such as construction certificates or defined completion stages—not vague dates.
SPAs may include late-completion penalties, but terms vary. Independent legal review is essential.
Contracts often include grace periods, late fees, and potential termination. Read default clauses carefully.
Some projects allow assignment with developer consent and a fee, commonly discussed around 2–5%—confirm in your contract.
Related Guides
- /guides/thailand-property-tax-foreigners/ — tax context
- /guides/hidden-costs-buying-property-thailand/ — broader costs
- /guides/buying-property-phuket-guide/ — Phuket roadmap
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