The Definition
Kai-Fak (ขายฝาก) is a Thai legal transaction often translated as sale with right of redemption. In Thailand, the seller transfers ownership to the buyer immediately, keeping a contractual right to buy it back within an agreed period by repaying the price plus lawful charges. It differs from a mortgage because the title actually transfers to the buyer immediately.
In Thailand, Kai-Fak is governed by the Civil and Commercial Code. Unlike Western mortgages where the borrower retains ownership, Kai-Fak transfers ownership immediately to the buyer, granting the seller only a strict contractual right of redemption. If the seller fails to redeem on time, the buyer retains permanent ownership. This structure poses severe risks if misunderstood as a simple loan. Furthermore, since Thailand generally prohibits foreigners from owning land directly, using Kai-Fak for land transactions is legally problematic and highly unadvisable for non-Thai nationals.
Let’s look at a real-world scenario to understand how Kai-Fak (Sale with Right of Redemption) is applied during a property transaction.
At month 16, the seller is ready to repay the total agreed amount within the redemption period. The buyer must then transfer the title back at the Land Office.
No. A mortgage keeps ownership with the borrower, while Kai-Fak transfers ownership to the buyer immediately and gives the seller only a strict right of redemption.
Generally no. Foreign land ownership is restricted in Thailand. Foreigners should use lawful structures like condo freehold, leasehold, or usufruct instead.
The buyer normally keeps the property because they are already the registered owner. This is the primary legal risk of Kai-Fak for the seller.
Kai-Fak can look like a simple financing tool, but it legally transfers ownership immediately. Misunderstanding these rules can lead to permanent property loss or costly disputes.
Always have a Thai property lawyer review the redemption clause and Land Office paperwork. Exact wording on the redemption period, possession, and payment timing is crucial.

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