Two commercial quotes with the same rent per square metre can cost very different amounts once you know the lease type behind them. Here's what gross, modified gross, net (NNN) and percentage leases actually mean, who carries the cost risk under each, and which structure is typical for office, retail, industrial and hospitality space in Thailand. General information only, never paid placement.
The four commercial lease structures in Thailand are gross (landlord absorbs costs), modified gross (base rent + a service/CAM charge — the Bangkok office norm), net/NNN (tenant pays tax, insurance and CAM on top of rent — typical for single-tenant buildings), and percentage (base rent + a cut of sales — the retail norm). Always ask for the fully loaded, all-in cost under each quote before comparing two spaces.
When two landlords quote you a rent per square metre, that number alone rarely tells you what you'll actually pay each month. The lease structure — how much of the building's operating costs (property tax, insurance, common-area maintenance, repairs) get passed on to you versus absorbed by the landlord — can shift the real, all-in cost by a wide margin, and those pass-through costs are usually not fixed for the term. A tenant comparing a lower “net” rent against a higher “all-in” rent without accounting for this is comparing two different things. Understanding the four structures below, and asking which one applies before you negotiate, is the single most useful habit for any commercial tenant in Thailand.
Under a gross lease, the quoted rent is intended to cover the landlord's property tax, insurance and common-area costs, and the tenant pays little beyond that rent plus its own utilities, telecom and interior fit-out. The landlord bears the risk that operating costs rise faster than expected. This structure is simplest for tenants to budget against, since the monthly number is close to the final number, but it's less common in Thailand for larger commercial space — it shows up most often in smaller, fully serviced or managed offices where the operator bundles everything into one fee, similar in spirit to a co-working membership.
A net lease passes some or all of the property's operating costs to the tenant on top of base rent. The “net” terminology stacks depending on how many cost categories are passed through:
NNN is the deepest form of cost pass-through and typically comes with a lower headline base rent to compensate, since the landlord is offloading cost risk. In Thailand, true NNN structures are most common for standalone, single-tenant buildings — a warehouse leased entirely to one logistics company, or a freestanding retail pad leased to a single brand — because there's only one tenant to allocate the full cost to. It's harder to apply cleanly to a multi-tenant office tower, which is why Bangkok office space more often uses the modified gross structure below.
A modified gross lease sits between gross and net: the tenant pays base rent plus a defined, usually capped slice of operating costs — most often a common-area maintenance (CAM) or service charge covering building management, security, shared utilities and upkeep of common areas — while the landlord typically continues to cover property tax and building insurance. This is the dominant lease structure for Bangkok's Grade A and Grade B office towers: a quoted rate per square metre for the base rent, plus a separately stated service charge per square metre, billed on top. When comparing office quotes, always confirm whether the advertised figure is “net” (base rent only) or “all-in” (rent plus service charge already combined) — the two are not comparable numbers unless you know which is which. See our office space guide for how this plays out district by district.
A percentage lease charges a base rent plus a percentage of the tenant's gross sales once revenue crosses an agreed threshold (the “breakpoint”), so the landlord's income moves with the tenant's trading performance. This structure is used almost exclusively in retail — shopping centres, malls, food courts, and high-footfall F&B locations — because it depends on the landlord being able to verify the tenant's sales, typically through point-of-sale data-sharing or audited reporting written into the lease. It rewards a strong-performing tenant with landlord alignment (the landlord wants you to succeed) but requires giving up some sales visibility. It's rare outside retail: office, industrial and most other commercial tenants don't disclose revenue in a form landlords can verify, so the model doesn't translate. See our retail space guide for typical Thai mall and shophouse lease norms.
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General information only — not legal or tax advice. Commercial lease structures, terminology and market norms in Thailand vary by landlord, building and negotiation, and change over time. Have any commercial lease reviewed by a qualified Thai lawyer before signing. BAANLYY never takes paid placement.
Primary and official sources are cited above. Government rules, fees and procedures in Thailand change over time and vary by office; always confirm current requirements with the relevant authority before relying on them. BAANLYY never takes paid placement in editorial content.