Key money in Thai property leases: what it is and how to protect yourself

What key money is

'Key money' (sometimes rendered as an 'entry payment' or 'access fee') is a lump sum paid by a tenant to a landlord at the time of signing, on top of the regular rent. In exchange, the monthly rate is set below the market level. In economic terms, it is simply a portion of the total lease cost paid upfront.

The complication is that the term has no single agreed meaning. In different countries 'key money' refers to entirely different things, and in Thailand that ambiguity regularly leads to disputes when a lease expires or renewal comes around.

In international practice 'key money' can refer to:

• a premium paid to a departing tenant in exchange for the assignment of a favourable lease where the rent is below market;
• an informal 'goodwill' payment to the owner in exchange for access to the premises;
• a security deposit.

In the Thai context the term most commonly denotes the first of its local meanings: a one-off component of the rent, encountered especially in commercial property leases.

How it works in practice

Consider a three-year commercial lease at an annual rent of THB 150,000. On top of that rent, the owner may request key money of roughly THB 100,000 to THB 500,000 - the exact figure depends entirely on negotiation. There are no fixed rules for calculating it.

The commercial logic is straightforward: the officially declared rent is kept below market, and the shortfall is 'hidden' under the label of key money. This is attractive to landlords because, as a rule, they do not declare such a payment as taxable rental income.

A significant consequence follows from this: key money is typically demanded again at renewal. It is not a one-off lifetime investment but a payment tied to a specific lease term.

Assignment presents a separate trap. If you take over someone else's lease at a suspiciously low rent, there is a good chance the previous tenant paid key money 'in an envelope', and when the lease is renewed that sum will be demanded from you.

Legal status in Thailand

It is necessary to be candid here: there is no formally defined concept of 'key money' in Thai law. It is a product of freedom of contract, not a distinct legal institution.

Leases as such are governed by the Civil and Commercial Code of Thailand. The key provisions are:

• Section 537 CCC - the general definition of a hire-of-property contract: one party makes property available for use in exchange for remuneration.
• Section 538 CCC - a lease of immovable property for a term exceeding three years is valid only if registered with the Land Department; otherwise it is enforceable for no more than three years.
• Section 540 CCC - the maximum term for a lease of immovable property is 30 years; any agreement for a longer term is reduced to 30 years.

Key money sits alongside these provisions. It is itself lawful as part of an agreed price, but precisely because it has no statutory definition it is essential to record its nature in writing: whether it is a component of the rent, a security deposit, or a non-refundable payment for the right to enter into the lease.

If that nature is not documented, a dispute is almost guaranteed. Foreigners on three-year leases regularly consult lawyers believing they have been deceived by the owner, when the real problem is a failure to understand what the payment was actually for.

Key money, deposit and rent: the differences

Why this matters for foreigners

For a non-resident buyer there are two related points that are often confused with lease payments.

First, the condominium foreign ownership quota. Under the Condominium Act, foreigners may own outright no more than 49% of the total unit area in a building. Long-term leases are a common way to work around the restriction for houses and land, and it is precisely in those arrangements that key money appears most frequently.

Second, bringing funds into the country. Where a condominium is being purchased by a foreign national, the funds must arrive from abroad in a foreign currency and the bank issues a FET (Foreign Exchange Transaction Form, formerly Tor.Tor.3). This is not formally required for a lease, but any large undocumented cash payment outside the contract creates risks, both in any subsequent resale of rights and in the event of a dispute.

What to check and what to watch out for

• Record the nature of the payment in writing. The contract must state expressly whether key money is a component of the rent, a deposit, or a non-refundable access fee.
• Clarify what happens at renewal. Whether key money is payable again on renewal and in what amount must be agreed before signing, not at the end of the term.
• Check refundability. Treat key money as non-refundable by default; if you expect it to be returned, that must be set out separately in the contract.
• Check the term and registration. A lease exceeding three years must be registered with the Land Department (Section 538), and the maximum permissible term is 30 years (Section 540).
• Be wary of a 'low rate'. A below-market rent in an assignment transaction often signals a concealed key money payment that will be demanded from you at renewal.
• Avoid payments 'in an envelope'. Undocumented sums cannot be defended in a dispute and will complicate any future transfer of lease rights.
• Verify the landlord's authority and title to the property before making any substantial payment.
• Engage an independent lawyer to review the contract, particularly for long-term leases of a house or land.