Phuket developers price off-plan units at a 10-25% discount to comparable completed stock. That discount is the buyer’s compensation for taking construction risk — the risk that the developer overruns on schedule, runs out of money, or fails to deliver. The payment schedule determines how much of that risk the buyer actually carries. This article covers what normal payment schedules look like in 2026, the structures used by larger versus smaller developers, and the contract terms that move risk between parties.
What a normal Phuket off-plan schedule looks like
For a typical THB 10M condo at a reputable Phuket developer with an 18-24 month build cycle:
| Stage | Timing | Cumulative % | Why this milestone |
|---|---|---|---|
| Reservation deposit | Day 0 | 1-5% | Hold the unit while SPA is drafted |
| SPA signing (1st instalment) | Day 14-30 | 15-30% | Lock in the purchase, fund early construction |
| Foundation complete | Month 3-5 | 35-45% | First objective progress milestone |
| Structure (low-rise) or floor 5/10/etc. (high-rise) | Month 6-12 | 50-65% | Mid-construction verification |
| Roof / envelope complete | Month 14-18 | 70-80% | Building weather-tight, fit-out begins |
| Fit-out 50% complete | Month 18-22 | 85-90% | Optional intermediate milestone |
| Handover (final balance + transfer fees) | Month 20-24 | 100% | Title transfer and key handover |
The shape — front 25-35%, middle 35-45%, end 20-30% — is the structure that most established Phuket developers use in 2026.
Where the variation actually lives
Two structural variations matter most.
Front-loaded vs back-loaded schedules. A 50/50 front-loaded schedule (50% before construction milestones, 50% at handover) puts the construction risk entirely on the buyer until the handover stage. A back-loaded 15/85 schedule (15% on signing, balance at handover, no milestone payments in between) puts the construction risk on the developer because they must fund the build themselves. Most schedules are somewhere in between. The 25-30% front, 50-60% milestones, 15-20% handover pattern represents a balanced risk allocation typical for mid-to-large developers.
Lump-sum vs milestone instalments. Some developers structure the middle payments as a single large milestone payment (e.g., 50% at “structure complete”). Others break it into 3-5 smaller instalments tied to specific milestones. Smaller, more frequent instalments are buyer-friendly because each payment is contingent on verifiable progress and the buyer can stop paying if progress stalls.
What different developer tiers actually offer
Tier 1 (Sansiri, Singha, Banyan Group, Boutique Corporation, Botanica). The Phuket-active first-tier developers used as the reference set elsewhere in this KB. Twenty-plus-year track records, multiple completed Phuket projects, audited financials and balance-sheet capacity to self-fund construction. Origin Property is a more recent entrant with strong Phuket project activity and can sit alongside tier 1 in practice. Typical schedules: 20-30% across signing and first instalment, 40-60% across 3-5 milestone instalments, 20-30% at handover. Often Escrow Act-covered. Material delay clauses (6-month grace, then buyer rescission right) standard.
Tier 2 (regional Thai developers with multiple completed Phuket projects). Established Phuket-specific developers like Laguna Property, Andaman Asset Solution, Layan Green Park Group, Anchan Villas. Schedules similar to tier 1 but escrow coverage less consistent. Negotiating on payment terms more flexible — these developers will often add buyer-protective clauses if asked.
Tier 3 (boutique villa developers and first-project condo developers). Schedules vary widely. Some are buyer-friendly; many use front-loaded structures (40-60% before any milestone) because they need buyer money to fund construction. The discount on tier-3 projects is typically larger, reflecting the risk. Due diligence on the developer’s track record, financial backers, and completed-project quality is critical.
Tier 4 (single-project developers and offshore-funded vehicles). Highest risk. Often offer aggressive discounts and front-loaded schedules. 2023-2025 saw several high-profile Phuket project failures in this tier, with buyers losing deposits and partial payments. For tier 4 projects, the safe approach is to wait until construction is well advanced and buy at the resale or near-handover stage, accepting the smaller discount.
What every milestone clause needs
The SPA milestone definitions are where buyer-protective clauses live or die. Every milestone payment clause should specify:
1. Objective verification. “Foundation complete” must reference an engineer’s certification or independent inspector’s report, not the developer’s self-assessment. The buyer or their representative should have inspection rights at each milestone.
2. Defined timeline. Each milestone should have an expected date or window. Without dates, the developer can stretch construction indefinitely with no buyer remedy.
3. Buyer cure rights. If the developer is materially late (6+ months past a milestone), the SPA should give the buyer the right to either pause further payments, claim penalty interest, or rescind and recover prior payments. Without cure rights, the buyer is locked in regardless of developer performance.
4. Symmetric penalty structure. Most developers include penalties for buyer-side late payment (typically 0.5-1.5% per month on overdue amounts). The SPA should include matching penalties for developer-side late delivery — typically 0.5-1.0% per month of the cumulative amount paid, accruing until handover. Symmetric penalty clauses are negotiating wins.
5. Specifications attached. The unit specifications (size, finishes, included appliances and fixtures, common-area amenities) must be attached as an annex. Without this, “substantial conformity at handover” is undefined and unenforceable.
How escrow changes the math
For projects covered by the Escrow Act B.E. 2551, buyer payments go into a licensed escrow account at a Thai bank instead of directly to the developer. The escrow agent releases funds to the developer only after verifying each milestone. If the developer defaults, unreleased funds return to the buyer.
This is the single most effective buyer protection available. Escrow coverage materially reduces — does not eliminate — the risk of deposit loss on developer failure. The fee runs 0.1-0.3% of the contract value, usually split between buyer and developer.
Not every Phuket project opts into escrow. Confirm coverage before signing. If a project is not escrow-covered, ask the developer to provide voluntary escrow through a Thai bank. Reputable developers will accommodate this; the rest are signaling they need direct access to buyer money.
See Escrow for property purchases in Thailand — what the 2008 Act actually does for the full mechanics and how to verify licensed escrow-agent arrangements under the Escrow Act framework administered by the Ministry of Finance.
Red-flag schedules from 2024-2026 Phuket disputes
Patterns that have shown up in real Phuket disputes:
The 50% upfront. A developer asking for 50%+ payment within 60 days of signing, before any construction milestone, is using buyer money as construction working capital. If the project stalls, recovery is procedurally hard. Walk away unless the developer has a tier-1 track record and the project is Escrow Act-covered.
The vague milestone. “Payment due when foundation is complete to developer’s satisfaction.” This gives the developer unilateral discretion to call milestones complete and trigger payment. Insist on objective engineering certification.
The no-penalty contract. Developer-side late delivery carries no consequence in the SPA, while buyer-side late payment carries 1-1.5% monthly penalty. Asymmetric. Negotiate symmetric penalties.
The amenity bait-and-switch. Promotional materials show a clubhouse, two pools, beach access shuttle. The SPA omits the amenities or describes them as “to be confirmed.” Insist on a full amenities annex.
The completion-period clause. “Estimated handover by Q4 2027” with no penalty for delay and no buyer right to rescind. Combined with front-loaded payment, this is the worst-case structure for buyers.
What to negotiate before signing
Realistic negotiating positions on a Phuket off-plan purchase in 2026:
- Reduce front-loading. Push for total pre-construction payment under 35% of the price.
- Add cure rights. Right to pause further payments after 90 days of milestone delay; right to rescind with full refund after 6 months of delay.
- Add symmetric penalties. Developer late-delivery penalty matching the buyer late-payment penalty.
- Add inspection rights. Right for the buyer or a representative to inspect at each milestone, with a defined response window for the developer.
- Add an escrow option. If not statutorily required, ask for voluntary escrow through a Thai bank.
- Add a financing contingency if using a mortgage (see When the deposit is refundable on a Thai property purchase).
- Get specifications attached as a numbered annex.
Reputable developers will usually agree to 3-5 of these. Developers who resist all of them are telling you something about how they view the deal.