How Thai Condo Contracts Handle the Same Completion Delay

A buyer sees a revised completion estimate in their inbox. It looks natural to start a clock from the earlier brochure date and apply the penalty percentage. Yet the promise to finish construction may sit several months away from the obligation to register ownership. An inspection appointment, a handover of keys and registration of the condominium unit are also distinct events. A contractor can be behind schedule without the buyer necessarily having an established 120-day late-transfer claim.

Two actual documents make that distinction visible. The publicly available SO Lagoon Cherngtalay agreement is bilingual and prominently marked DRAFT; the MODEKO Residential Freehold Agreement is another bilingual text published online. Neither publication identifies the final signed and amended contract applicable to a particular buyer. Nor do they tell us whether a project has missed its obligations. The exercise compares words in the available agreements, not the conduct or solvency of either seller.

Here is the shared hypothetical: a THB 5,000,000 condominium purchase, THB 2,000,000 of receipted instalments, no title transfer, a buyer who has fulfilled the relevant obligations and no legally effective extension. Assume that 120 chargeable calendar days have passed after each agreement's own established transfer deadline. The 120 days, price and payments are invented for the calculation; they are not descriptions of either development. We count the day after the operative deadline as day one and do not count that deadline twice.

Now put two calendars side by side. In one, the promised date links completion, condominium registration and readiness to transfer. In the other, a defined construction Completion Date comes before an outside period for registering title. If both buyers look only at the day advertised for finishing the building, one could already be past a transfer obligation while the other's 180-day registration window is still relevant. But once we establish 120 days beyond each legally operative transfer deadline, we finally have equivalent inputs for a penalty illustration. Those periods need not occur in the same months—or even the same year.

That choice of starting point is the entire point of the comparison. It avoids turning a construction update into a legal finding. Whether the seller can register title, whether the buyer can complete the purchase, and whether any extension survives scrutiny are separate facts that a published specimen cannot settle.

SO Lagoon clause 4.4 places three things against 29 December 2027 in its posted DRAFT: completion of the condominium, condominium registration and readiness to transfer ownership. It calls for at least 30 days' notice of the intended title-registration appointment, with registered post and email specified in the English text. Clause 4.5 refers to the same date and has conditional language about no further notice in certain circumstances; clause 4.6 ties acceptance to the agreed construction requirements. Their interaction with the general 30-day notice provision needs the executed version. Those are features of a posted draft, not independently verified dates for the development or any final signed SPA.

MODEKO's document uses a different sequence. Clause 1.2.1 defines 1 February 2026 as the construction Completion Date. Clause 4.1 then provides for title registration immediately after completion and, in any event, within 180 days, subject to a possible extension under clause 5.3. The buyer is to receive at least 30 days' notice before registration. Adding 180 calendar days to the printed date gives 31 July 2026, assuming no extension and the ordinary calculation that starts on the following day. That is a worked reading of an online agreement, not a finding that MODEKO missed a deadline. The interaction between 'immediately' and the outer 180-day limit may itself require contractual interpretation; the latter is not necessarily a free pass to delay without explanation.

Extension provisions make the calendars more complicated. In SO Lagoon clause 5.6, the seller describes causes outside its control, written notice supported by evidence within 15 days after the event ends, and a postponement corresponding to the interruption, subject to a one-year ceiling. MODEKO clause 5.3 instead asks for notice with written supporting evidence within 30 days of the event occurring. It refers to a one-year limit and says the right to extend is waived if the seller does not notify. For a disruption lasting weeks, the different starting points for notice are far more important than comparing the numbers 15 and 30 in isolation.

There is a separate legal benchmark. Clause 5.3 of the prescribed O.Ch.22 condominium agreement addresses work interrupted through no fault of the seller. Its notice-and-evidence requirement runs for seven days after the interruption ends, with an extension no longer than the actual disruption and an overall one-year cap. The prescribed form also treats failure to notify as a waiver of the extension right. Clauses 4.4 and 7.3 address readiness for transfer and the remedies associated with an unfulfilled deadline. Section 6/2 of Thailand's Condominium Act requires the prescribed ministerial agreement form for transactions falling within its scope; a non-conforming provision that disadvantages the purchaser may be ineffective. That is a reason to compare the applicable signed Thai documents with O.Ch.22, not a basis for announcing that either publicly posted clause is automatically invalid. The seller's legal identity and the actual type of transaction matter.

Nor should an overseas buyer throw away an earlier brochure. Section 6/1 can make promotional materials part of the relevant condominium contract and calls for purchaser-favourable interpretation of conflicts in its scope. The brochure may be evidence; it does not, by itself, settle when the daily contractual penalty starts. To establish that date, the purchaser needs the operative transfer obligation, any supportable extension, proof of notice, and evidence that registration could and should have occurred.

Side-by-side wording from the posted SO Lagoon DRAFT (clauses 4.4, 5.6, 8.3) and MODEKO agreement (1.2.1, 4.1, 5.3, 7.2), reviewed on 11 October 2026. Neither column establishes a signed contract, an actual breach or an enforceable outcome.

The money example starts only after the legal timing question has been answered. Each hypothetical purchase has a THB 5,000,000 price, THB 2,000,000 in documented instalments and 120 chargeable days beyond its own operative title-transfer deadline. The buyer is ready to perform, the seller has not registered title, and there is no valid extension. These assumptions were invented for illustration; none is a statement about a SO Lagoon or MODEKO purchaser. We will examine continued performance and cancellation separately because the contractual options are not necessarily cumulative.

Both publicly posted texts use 0.01% of the purchase price per day, subject to a total ceiling of 10%: SO Lagoon clause 8.3.2 and MODEKO clause 7.2. On those assumptions, THB 5,000,000 multiplied by 0.0001 is THB 500 a day. Multiply by 120 eligible days and the illustrative figure is THB 60,000. The stated cap would be THB 500,000. Day one is the day after the legally effective deadline in this example. Actual notice requirements, payment status and a supportable extension could change the count or the entitlement. There is no evidence here that either seller owes this amount.

SO Lagoon clause 8.3 sets out different paths after a failure to transfer by the date required under clause 4. Under clause 8.3.1 the purchaser may terminate and seek back amounts paid with interest expressed at 2.5% per year. The same provision contains a deduction for promotional items already received, measured by their purchase value. If the buyer keeps the agreement alive instead of electing that cancellation route, clause 8.3.2 describes a daily penalty up to the 10% ceiling, with a further termination possibility if the maximum has been reached and continued performance appears impossible. Clause 8.3.3 addresses yet another situation, where the seller cannot continue the project for specified external reasons; that provision refers to a Krung Thai Bank fixed-deposit interest benchmark. Treating these paragraphs as one automatic package of payments would misread the alternatives. Whether a gift deduction or any individual term is legally effective must be assessed separately.

MODEKO's clause 7.2 creates an especially useful contrast. It says the accumulated daily penalties are to be deducted from the final instalment under Schedule 1. Suppose, purely for illustration, that the unpaid THB 3,000,000 balance in our model is entirely the final scheduled instalment. Applying a THB 60,000 credit would reduce that payment to THB 2,940,000. That example falls apart if the actual schedule assigns a different amount to the final instalment. More importantly, a reduction of a future payment is not THB 60,000 received in a bank account. It may become usable only if the transaction proceeds to the point at which the credit can be applied. If it never reaches that point, the buyer's position requires further analysis rather than an imaginary cash receipt. Clause 7.2 also contemplates termination if transfer still does not occur after electing the penalty route; that does not establish an automatic right to stack every amount.

MODEKO also offers an alternative in clause 7.2: termination and return of the amounts paid, plus 5% yearly interest from the date each amount was paid. That structure makes a dated receipt for every instalment indispensable. It does not mean that 5% can be applied to the full THB 2,000,000 from the first booking date, or that the refund arrives immediately. The posted document says the timing for repayment is to be agreed between the parties after termination. SO Lagoon's 2.5% termination clause does not, on its own, resolve every question about the accrual period or its promotional-item deduction. Comparing the two percentages as though they were ready-to-collect annual returns would conceal exactly what a buyer needs to know.

A reliable refund calculation therefore needs the payment ledger, the contractual interest start and end dates, the legally relevant day-count convention, and any permissible set-off. Only then can the amounts for each instalment be calculated and aggregated. With just an overall paid principal of THB 2,000,000 and a 120-day late-transfer period, there is no defensible single 'net refund' figure. Nor should the illustrative daily penalty be added to an assumed full refund without examining the election and interaction of remedies. Lost rental income is a further, separate allegation requiring its own legal basis and evidence, not another name for the 0.01% formula.

A buyer may have four documents with four slightly different stories: an early sales brochure, an English agreement emailed by an agent, a signed Thai-language set and a later message announcing a revised handover. They cannot be treated as interchangeable. The brochure records a representation; a public specimen shows possible wording; the executed SPA and its schedules identify the obligations actually undertaken. A subsequent amendment may change those obligations. Even contracts sharing a project name can be different versions, and the English text may not determine the effect of the Thai document if they diverge.

The next question is whether registration of ownership was due and possible. Under SO Lagoon clause 4.4 the seller is to provide advance notice of the registration appointment; MODEKO clause 4.1 also provides for advance notice, but works from a separate post-completion period. A finished-looking interior or an invitation to inspect does not establish registrable title. The buyer's side matters too. Instalments may have to be up to date, inspection or attendance requirements may apply, and documents needed for an eligible ownership transfer must be in order. A default or inability to complete on the buyer's side can affect an apparently straightforward seller-delay calculation.

For an extension claim, dates and causation matter more than labels. What interrupted the works? Did it prevent the relevant performance, or merely make construction more expensive? When did it begin and end? What written evidence did the seller provide, how and when was the notice delivered, and how many days of interruption does it support? These questions expose the different notice mechanisms in SO Lagoon clause 5.6, MODEKO clause 5.3 and O.Ch.22 clause 5.3. A statement saying 'force majeure' is not itself proof of an allowed one-year extension. Conversely, whether a buyer's separate signature is needed cannot be assumed from a general article: the actual agreement and applicable law must govern the answer.

Finally, the claim has to correspond to amounts and events that can be traced. Instalment receipts identify how much was paid and on which dates. Correspondence records whether the buyer elected to keep the contract alive and claim a penalty, or instead communicated cancellation. Delivery evidence matters if a contractual notice mechanism is contested. Earlier advertising may also carry legal weight under section 6/1 of the Condominium Act in transactions within its scope, so it should not simply be discarded. An updated brochure date and a spreadsheet calculation may justify a serious enquiry; they do not complete the chain needed to prove an entitlement or a payment.

Contractual entitlement and recovery are different stages. A purchaser who still wants the unit may prefer to pursue completion while asserting a delay penalty. Someone who no longer wishes to wait may be considering termination, recovery of instalments and interest. SO Lagoon addresses those routes in clauses 8.3.1–8.3.3; MODEKO puts its principal alternatives in clause 7.2. The drafting matters because the buyer's options can interact. The fact that two possible numbers appear in a contract does not establish that both can be collected together.

An effective claim generally needs to identify the agreement relied on, the operative deadline, the factual failure and the remedy being elected. A dated calculation should tie each requested amount to a clause and, for a refund, to receipted instalments. The method of sending notice and evidence of receipt can become significant if the seller contests the claim. A bare email demanding THB 60,000 because a building seems late leaves the transfer deadline and any extension unresolved. So can signing a revised completion or cancellation proposal without understanding whether it changes the earlier rights, creates a new repayment timetable or releases claims.

There is a useful ladder of certainty. A buyer calculates an amount. The seller acknowledges the correspondence. An amount is negotiated or admitted. A settlement is signed, or a competent body makes a determination. Finally, the buyer receives cleared funds, or a promised credit is actually applied. Each stage supplies different evidence. In MODEKO's described mechanism, even an accepted penalty calculation is not cash recovery if it will be used against a future final instalment. Where the buyer terminates, the agreed repayment date and proof that a transfer reached the account matter more than an impressive annual percentage in the specimen.

Thailand's Office of the Consumer Protection Board (OCPB) described two broad choices in guidance dated 8 June 2026: cancellation with a refund and interest, or continuation with a daily late-completion penalty in cases covered by the applicable framework. The agency provides official complaint channels, but lodging a complaint does not amount to a binding award or receipt of money. An OCPB report from June 2017 describes a condominium transfer dispute that ended in a recorded settlement. It shows that a consumer complaint may lead to an agreement. That report does not prove the agreed amount was later paid, and it says nothing about a claim involving either agreement compared here.

A contested matter may require review of the Thai wording, the parties' legal capacities, the available forum, applicable time limits and the evidence needed for that forum. Those are not interchangeable across a condominium freehold SPA, another ownership structure or a different seller. Before accepting a cancellation offer, the buyer should understand which obligations end, which claims are released and when the money must be returned. The central distinction survives every procedural variation: a clause describes a potential remedy, a demand asserts it, an agreement or decision may establish what is owed, and an actual credit or payment is a further event that needs proof.