Off-Plan Payment Milestones in Thailand: What to Expect
Off-plan payment schedules in Thailand typically follow 5-6 milestones spread over 2-4 years of construction. The reservation deposit is usually 50,000-200,000 THB, followed by 25-35% at SPA signing, then 10-15% payments triggered by construction stages (foundation, structure, interior finishes), with the remaining balance due at handover. Each milestone is triggered by verified construction progress, not calendar dates.
For the wider decision this page sits under, whether to buy off-plan at all, start with the off-plan versus resale guide.
Why Milestone-Based Payments Exist?
The milestone structure is embedded in the Sale and Purchase Agreement (SPA), which is the legally binding contract you sign within 30-60 days of your reservation. Understanding every milestone, what triggers it, how to verify it, and what your rights are if it’s missed, is essential before committing.
Stage 1: Reservation Fee
- 50,000-100,000 THB for budget to mid-range condos
- 100,000-200,000 THB for mid-range to premium condos
- 200,000-500,000 THB for luxury villas and high-end units
- Some developers accept $2,500-5,000 USD equivalent
The reservation locks in your unit at the quoted price and takes it off the market for 7-14 days, giving you time to arrange legal review and SPA signing preparation.
Refundability: Reservation fees are usually non-refundable once the hold period passes, typically after 7-14 days. Some developers offer a 48-hour “cooling off” window, but this is not standardized in Thai law. Confirm refund conditions before paying. See Reservation Agreement in Thailand for the full breakdown.
Stage 2: SPA Signing (25-35%)
Key things the SPA governs:
- Exact payment schedule with all milestones defined
- Completion date (and grace period, typically 12-24 months beyond projected finish)
- Penalty clauses if either party defaults
- Unit specifications (size, fixtures, finishes, furniture package if included)
- Common area descriptions (pool, gym, reception, what’s confirmed vs indicative)
- Force majeure provisions (pandemic, natural disaster, how delays are handled)
The SPA payment is due within 30-60 days of reservation. Transfer this amount from your overseas bank account to receive the FET certificate required for foreign freehold registration. See our guide on bank transfers for Thai property for the correct process.
Stage 3: Foundation Complete (10-15%)
How to verify: Reputable developers send progress reports with photos and construction updates. For additional confidence:
- Request certified architect or engineering sign-off on the stage
- Visit the site yourself if you’re in Phuket (or have an agent do so)
- Some developers use third-party project monitoring services
Payment method: Transfer from your overseas account. Always keep records of each transfer, you’ll need them for the FET certificate process at final registration.
Stage 4: Structure Complete (10-15%)
On a 36-month construction cycle, this milestone typically falls around months 12-18. In practice, you should expect delays of 3-6 months as normal for Phuket construction (weather, supply chain, permit processing).
Stage 5: Interior Works Complete (10-15%)
What to watch for: Some developers issue an interior milestone invoice when work is only 50-60% complete. Your SPA should define what “interior complete” means specifically; if it doesn’t, push for clarification in writing before paying.
Stage 6: Handover / Completion (Remaining Balance)
- You conduct a snagging inspection (walk-through to identify defects)
- The developer rectifies agreed snags (or you negotiate a retention amount)
- You transfer title at the Land Office
- You receive keys and ownership documents
Do not pay the final balance before completing your snagging inspection. This is your last point of leverage. See Handover Risks for Off-Plan Projects in Thailand for common issues and how to handle them.
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Want to review an off-plan payment schedule before signing? MORE Group provides free contract review support for buyers.
How to Verify Construction Milestones?
1. Site visits If you’re in Phuket, visit the site personally before making each payment. If you’re overseas, appoint a local representative under Power of Attorney to inspect on your behalf.
2. Progress reports Reputable developers provide monthly or quarterly construction updates with photos, video walkthroughs, and progress percentages. Request these if not provided automatically.
3. Third-party project monitors Some buyers engage independent construction consultants to verify milestone completion, particularly for high-value purchases above $500,000. Cost is typically $500-2,000 per inspection.
4. Architect certification Request that milestone completion is certified by the developer’s lead architect or structural engineer before each payment. This creates a paper trail and adds accountability.
What Happens If the Developer Misses a Milestone?
- Grace period: Developer typically gets 12-24 months beyond projected completion before buyer can formally claim breach
- Penalty interest: Some SPAs entitle buyers to 0.01-0.1% per day of delayed payment on the outstanding balance
- Termination right: If delay exceeds grace period, buyer may have right to terminate and receive refunds (typically principal only, not investment return)
- Force majeure: COVID-19 established precedent for broader force majeure claims, check if your SPA includes modern language
If a developer defaults: Engage a Thai property lawyer immediately. Options include negotiated settlement, lodging a complaint with the Consumer Protection Board, or civil litigation. Prevention is far better than cure, always buy from developers with a track record of completed projects.
Currency Considerations Across Multiple Payments
- A 5% shift in the THB/USD rate on a $250,000 purchase is $12,500 difference
- Consider staging purchases to average the exchange rate (dollar-cost averaging)
- Some developers allow pricing in USD, this removes THB fluctuation risk
- See our Exchange Rate Risk Guide for detailed strategies
Milestone discipline on off-plan SPAs
| Milestone label | What to verify on site | Stop signal |
|---|---|---|
| Foundation | Rebar and pile caps | Waterlogged soil unresolved |
| Structure | Floor plates match plan | Repeated redesign notices |
| Finishing | MEP rough-in complete | Unpaid contractor liens rumoured |
Scenario A: investor buyer: stagger maximum cash until juristic formation is imminent. Scenario B, end-user buyer: accept earlier finishing draws only if escrow or completion bond exists. Registration in Phuket commonly runs 6-10 weeks after physical handover when FET certificates are queued correctly.
Red flags: When milestone payments go wrong
Vague milestone definitions: SPAs that use phrases like “substantial completion” or “when walls are up” instead of specific, measurable criteria. This gives developers wiggle room to claim milestones are met when they’re only partially complete.
No photographic evidence requirements: Developers who refuse to provide construction photos or site access for milestone verification may be hiding delays or quality issues. Insist on quarterly photo updates and site visit rights.
Calendar-based payments instead of milestone-based: If your SPA requires payments on specific dates rather than upon actual construction progress, you’re essentially lending money to the developer with no guarantee of matching progress.
Missing engineer certifications: Milestone payments should be backed by structural engineer sign-off, not just developer claims. Without independent verification, you’re trusting marketing over engineering reality.
Weak escrow or no escrow: If milestone payments go directly to the developer’s operating account, you have no protection if they use your money for other projects or operating expenses instead of your building.
Rushed final payments: Developers pressuring for the final 30-40% payment before you’ve completed a thorough snagging inspection typically want to close before you discover defects they’d rather not fix.
Developer financing vs bank construction loans
Pre-sales funded projects: Developer uses buyer payments to fund construction. Higher risk if sales are slow or developer has cash flow issues elsewhere. Benefits: often better pricing for early buyers.
Bank construction loan projects: Thai commercial bank provides construction financing, reducing reliance on buyer payments. Lower risk of stalled construction due to cash flow. Benefits: bank has vetted the developer and project viability.
Mixed financing: Developer uses both bank loans and buyer payments. Moderate risk depending on the mix. Most common structure for mid-market developers.
How to check: Ask your developer directly about financing structure. Bank-financed projects often advertise this as a selling point. Check whether a major Thai bank logo appears in marketing materials.
Payment schedule optimization strategies
Early completion discounts
Some developers offer 3-5% discounts for buyers willing to pay more upfront. Only consider this if the developer has multiple completed projects and strong financials. Never pay more than 50% before construction is 50% complete.
Staging large payments
For payments over $50,000, consider splitting into smaller tranches tied to sub-milestones. Instead of $100,000 at “interior completion,” negotiate $50,000 at “MEP rough-in” and $50,000 at “interior finishes complete.”
Currency hedging for milestone payments
If you’re paying in different currencies over 24-36 months, consider forward contracts for larger milestone payments. A 10% currency move on a $200,000 project costs $20,000, more than most legal fees.
Joint escrow arrangements
For high-value purchases, negotiate joint escrow accounts where both buyer and developer must approve milestone payment releases. Adds complexity but provides maximum protection for purchases over $500,000.
Quality verification at each milestone
Foundation milestone verification:
- Foundation depth matches soil report recommendations
- Reinforcement steel placement matches structural drawings
- Concrete testing certificates from batch plant
- Waterproofing membrane properly installed and sealed
Structural milestone verification:
- Column and beam placement matches architectural plans
- Floor slab thickness and reinforcement correct
- Elevator shaft and stairwell dimensions accurate
- External wall framing matches approved drawings
Interior milestone verification:
- MEP (mechanical, electrical, plumbing) rough-in complete and tested
- Wall and ceiling framing matches unit layouts
- Bathroom waterproofing complete and flood-tested
- Kitchen rough-in matches appliance specifications
Completion milestone verification:
- All fixtures, finishes, and appliances installed and tested
- Air conditioning system commissioned and cooling properly
- All doors, windows, and locks function correctly
- Common areas and landscaping substantially complete
What a milestone should say, and what it usually says
The difference between a schedule that protects you and one that does not is whether each stage names a verifiable event or a date.
| Weak wording | What it lets happen | Stronger wording |
|---|---|---|
| ”Month 12” | Payment falls due whether or not work has progressed | ”On completion of the structural frame to the top floor, certified by an independent engineer" |
| "On commencement of finishing works” | The developer decides when that is | ”On completion of external walls and glazing installation, verified on site" |
| "On practical completion” | Undefined term, developer’s judgement | Defined against a schedule of works annexed to the contract |
| ”Final payment on handover” | You release everything before snagging is closed | ”Final payment within X days of the snag list being closed to the buyer’s satisfaction” |
The last row is the one worth fighting for. The final tranche is the only leverage that survives to handover, and buyers routinely release it because the unit looks finished and the developer is pleasant. Once it is paid, the defect list becomes a request rather than a condition.
The three clauses to negotiate before the first payment
| Clause | Why it matters | What to ask for |
|---|---|---|
| Delay penalty | Thai off-plan has historically run 6-18 months late; this is the most likely adverse event | A per-day figure, and a long-stop date after which you may terminate and recover paid funds |
| Escrow or project account | Determines what happens to paid money if the project stalls | The receiving entity named, and the account’s status confirmed |
| Assignment | Whether you can sell the contract before completion | Explicit permission, with the fee capped, rather than silence or prohibition |
Assignment is the one nobody asks about and the one that matters if your circumstances change. Many Thai developers restrict it, charge for it, or prohibit it until a stated percentage is paid. A buyer who needs to exit at month eighteen of a thirty-six-month build has no other route, and the market for a part-paid contract is thinnest exactly when you would need to use it.
Insider tip: ask what proportion of the building is already sold and to whom before agreeing a front-loaded schedule. A developer with strong pre-sales has less need for your money early and more room to move on terms; one asking for 50% at contract on an early-stage build is asking you to fund construction on trust.
Legal protections in milestone SPAs
Delay penalty clauses
Meaningful financial penalties if the developer misses milestones. Recommended minimum: 0.1% per day of the total purchase price for delays beyond 30-day grace periods.
Termination rights
Right to cancel the contract and receive refunds if delays exceed 12-24 months (depending on project size). Include explicit refund percentages and timelines.
Force majeure limitations
Restrict force majeure claims to genuine unforeseeable events. Weather delays beyond historical norms, permit delays due to incomplete applications, and financial difficulties should not qualify.
Milestone modification procedures
Procedures for modifying milestone schedules, including requirements for engineer certification and buyer approval for any significant changes.
Quality standards
Specific quality standards that must be met at each milestone, with procedures for dispute resolution if standards aren’t met.
Frequently Asked Questions
Yes, especially for higher-value purchases. Developers often accommodate buyers requesting fewer, larger payments (e.g., combining foundation and structure milestones) or extended SPA payment timelines. However, they rarely agree to push back the initial SPA deposit percentage, as this funds early construction. Negotiation is most effective before the reservation agreement is signed.
Your SPA will specify grace periods (typically 30-60 days) before the developer can issue a formal default notice. After the grace period, developers may charge penalty interest (often 1.5% per month) and, in extreme cases, terminate the contract and retain your deposit. If you anticipate payment difficulty, communicate with the developer early; many will agree to short extensions rather than face the legal and administrative cost of termination.
No. Most milestone payments can be made by international bank transfer. You do need to be present (or have a Power of Attorney representative) only at the Land Office title transfer at final handover. The rest of the process, including SPA signing, can often be handled remotely with proper documentation and legal support.
Functionally similar but legally different. Mortgage payments go to a bank that owns the property until you pay off the loan. Off-plan milestone payments go directly to the developer, and the property isn't technically yours until handover and Land Office registration. Unlike a mortgage, most developer installment plans charge 0% interest, making them an attractive alternative to traditional financing.
Each time you transfer money from overseas to Thailand specifically for a property purchase, your Thai bank should issue a Foreign Exchange Transaction (FET) certificate for that transfer. You'll need FET certificates for all transfers (minimum totaling the purchase price) to register foreign freehold at the Land Office. Request the FET certificate immediately after each transfer, banks can be reluctant to issue them retroactively.
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Phuket Real Estate Experts
The MORE Group team has helped 500+ European and American buyers purchase property in Thailand. We provide legal support, 0% commission, and on-the-ground expertise with 8 years in the Phuket market.
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