Buying Off-Plan vs Resale in Bangkok: Real Numbers, Real Risks

How does the payment structure differ between off-plan and resale?

This is the biggest practical difference, and the one buyers underestimate. The off-plan structure is gentler on cash flow: you might put 900,000 THB into a 4.5M THB unit over three years, then need 3.6M THB at the end. That final payment is the danger point: if your finances, the exchange rate, or your home-country property sale goes wrong in year three, you are committed. Resale is the opposite: brutal upfront (you need nearly the full amount within weeks), but over fast. For both routes, foreign buyers must route funds from abroad correctly for freehold registration, and for off-plan, every installment should come in from overseas in foreign currency, not just the final payment.

• Off-plan booking fee: 50,000-100,000 THB, sometimes 200,000 THB for larger units, usually credited against the price.
• Off-plan contract signing: 5-15% within 2-4 weeks of booking.
• Off-plan construction installments: the balance up to roughly 20-30% total, spread monthly or tied to construction milestones over 24-36 months.
• Off-plan final payment at transfer: the remaining 70-80% when the building is completed and registered.
• Resale booking/deposit: usually 5-10% held in escrow or by the agent.
• Resale balance: at the Land Office on transfer day, typically within 30-60 days of agreeing the deal.

What is developer risk, and how do I check a developer?

Developer risk is the chance the project is delayed, downgraded in spec, or never completed. It is the single biggest risk unique to off-plan. Bangkok has a generally good recent record with major developers, but delays of 6-24 months are common enough that you should plan for them, and stalled or cancelled projects do happen, especially with smaller developers during credit squeezes. Opinion, clearly marked: I am comfortable recommending off-plan from large, listed Bangkok developers with a visible completed track record. I actively talk clients out of off-plan from small first-time developers, no matter how good the showroom looks.

• Track record of completed buildings. Not launched, completed. Visit a finished project from 3-5 years ago, look at the common areas, ask residents how defects were handled in the first year.
• Listed vs private. Developers listed on the Stock Exchange of Thailand publish audited financials. Private developers are not automatically bad, but you have far less visibility.
• Sales velocity of the project itself. A project 70% sold with strong Thai domestic demand is much safer than one 30% sold mostly to overseas investors, because construction financing depends on presales.
• Contract quality. Have a lawyer read the sales and purchase agreement before you pay the contract installment: completion date clause, delay penalties, and what happens to your money if the project is cancelled.
• Where your money sits. Thailand does not generally require buyer installments to sit in a protected escrow account for condo projects. Your installments fund construction, which is why the checks above matter so much.

What is EIA approval and why does it matter?

EIA stands for Environmental Impact Assessment. Large condo projects in Thailand must receive EIA approval before construction can legally proceed. If a project is being sold before EIA approval, there is a real chance the design changes (height cuts, unit reconfigurations) or the timeline slips by a year or more. Some developers sell pre-EIA at attractive prices to fund land costs; that can work out fine, but you are taking approval risk on top of construction risk. How to check: ask the sales agent directly and ask to see evidence, or have your lawyer verify it. Vague answers like approval is expected soon are your answer. My rule of thumb: pre-EIA pricing is only interesting if the discount is genuinely large and you can afford the timeline to slip. For most foreign buyers wiring money from Europe, I suggest sticking to post-EIA projects.

How do off-plan and resale prices per square meter actually compare?

Here is where I need to be honest instead of repeating the marketing line that off-plan is always cheaper. As of July 2026, in several Bangkok districts, new launches price at or above nearby resale. Developers price for tomorrow; sellers of resale units price off what they paid years ago. Illustrative example, clearly labeled as illustrative, not live market data. Imagine a mid-Sukhumvit location: a new off-plan launch at 180,000-210,000 THB/sqm early-bird, rising to 200,000-230,000 THB/sqm by the final phase, against resale units in a well-maintained 2016 building 300 meters away at 140,000-165,000 THB/sqm, negotiable. In this pattern, which I see regularly, the cheap off-plan unit is 20-30% more expensive per square meter than the resale alternative down the street. The reverse also happens where developers discount aggressively to hit presale targets. The lesson: before you buy anything, pull asking prices per square meter for three to five comparable completed buildings within 500 meters, and compare. Any decent agent will do this with you.

When does off-plan win?

In my experience, off-plan is the right call in these situations:

• You want a specific unit. Floor, facing, stack, layout. Early buyers get the pick of the building; resale gives you whatever happens to be on the market that month.
• Early-bird pricing is real. First-phase prices are commonly 10-20% below later phases, and launch events often stack furniture packages or fee waivers. Verify against resale comps so the discount is not just off an inflated list price.
• You want to stage your cash. Spreading 20-30% over two to three years suits buyers accumulating funds or unwinding assets at home. FX cuts both ways.
• You are buying to hold long-term. On a 10+ year horizon, a newer building with modern facilities and a fresh sinking fund tends to hold tenant appeal better than a 2012 building with aging common areas.
• Transfer costs are often shared or promoted. Developers frequently offer to split or cover transfer fees at launch; on resale, fees are a negotiation between buyer and seller.

When does resale win?

Resale wins more often than the developer showrooms would have you believe:

• You want yield now. A resale unit can be tenanted within weeks of transfer. An off-plan unit produces zero income for two to three years while you fund installments. Three years of 4-6% gross yield is a serious head start, and you see actual rent achieved, not a brochure projection.
• What you see is what you get. You inspect the actual unit, the actual view, the actual noise from the actual construction site next door. Off-plan buyers regularly discover at handover that the garden view is a wall.
• You can check the building's health. Juristic management, sinking fund balance, percentage of units in arrears on common fees, rental vs owner-occupier mix. All inspectable on resale, all unknown on off-plan.
• Negotiating room. Individual sellers have individual motivations; developers have a price list and a target. Some of the best deals I have put together were resale units from owners who needed to exit.
• The foreign quota is confirmed. On resale you can verify the unit sits in the foreign freehold quota today, at the Land Office. Off-plan, you are trusting the developer's quota allocation; get it in writing.

Can I flip or assign an off-plan contract before completion?

Yes, usually, and it is a legitimate strategy in Bangkok: buy at early-bird pricing, sell the contract (an assignment) before or around completion, capture the uplift without ever paying the 70% balance. But the details are controlled by the developer, not by you. Read the assignment clause before you sign, not when you want to sell.

• Name-change fees: most developers charge an assignment fee, commonly a flat fee or around 1-5% of the price. Some waive it for the first assignment as a launch perk.
• Payment thresholds: many contracts only allow assignment after you have paid a minimum percentage, or past a certain construction stage.
• Approval: the developer typically must approve the new buyer, and assigning into a foreign buyer requires foreign quota availability.
• Taxes: flipping within a short window can trigger specific business tax on the eventual transfer, and any profit is income. Get tax advice before building a strategy around this.

So which should you choose?

My honest summary, opinion clearly marked. Choose off-plan if you have a 10-year horizon, want a specific unit, value staged payments, and are buying from a developer whose completed buildings you have personally walked through. Choose resale if you want rental income this quarter, want to inspect exactly what you are buying, or find that comparable resale is 15%+ cheaper per square meter, which as of July 2026 it frequently is in established Bangkok districts. If you cannot visit Bangkok for any of this, the whole process can be run remotely with a power of attorney. Whichever route you take: compare price per square meter against three to five nearby completed buildings, have a lawyer read the contract, and never let a launch-event countdown timer make a financial decision for you.

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