How the condo common area fee works in Thailand, and what a fair rate looks like

Key Highlights

• The formula has only two inputs, your unit size in square metres from the title deed, multiplied by the building's monthly rate per square metre
• Rates across the Bangkok market run from roughly 20 baht to 200 baht per square metre per month, and five commonly cited sources give five different ranges, so always ask the building for its actual figure
• Expressed as a share of what the unit is worth, a sensible rate across every grade sits in a narrow band of roughly 0.41 to 0.63 percent of unit value per year, which gives you a test you can run yourself
• The one-time sinking fund runs about 500 to 800 baht per square metre, and together with a year of common fees paid in advance it forms a transfer-day cash outlay most buyers never budget for
• Arrears carry a surcharge of up to 12 percent a year, rising to up to 20 percent a year once six months overdue, and no unit can be transferred without a debt-free certificate

What is the condo common area fee and why must owners pay?

The condo common area fee is the money every co-owner pays into the building's shared budget so the juristic person can run and maintain everything nobody owns individually. That covers lifts, common area power, fire systems, security staff, the pool, the gym, and the people who manage all of it. It attaches to ownership rather than to occupancy, so an owner who leaves a unit empty for a year pays exactly the same as a neighbour who lives there every day.

Section 18 of the Condominium Act sets the principle. Co-owners share the cost of common property in proportion to their interest in that common property. In practice that proportion tracks unit size, which is why buildings quote the fee in baht per square metre per month.

For anyone buying here from abroad, this is one of the few recurring ownership costs that is fixed by the building rather than by your own usage, and it is also one of the easiest to verify before you commit. What follows is how to read the number you are quoted.

1. How is the fee calculated and what is the market rate?

Two inputs, and only one of them can change

Monthly fee equals unit size in square metres multiplied by the building's rate per square metre per month. Sansiri's buyer guide, updated 2 June 2026, uses a project charging 50 baht per square metre, where a 34.75 square metre unit pays 1,737.50 baht a month.

Your unit size is fixed by the title deed and cannot move. The rate can, but only by resolution of the general meeting of co-owners. A management company cannot raise it on its own, a point confirmed by both Ananda's calculation guide published 5 May 2026 and CheckRaka.

One detail that catches new buyers off guard is the billing cycle. Most buildings collect six months to a full year in advance on transfer day, not monthly the way rent works.

Five sources, five different ranges, and how to read them

We checked the five references people rely on most for this question. Every one of them gives a different range. None of them is wrong. They simply sample different groups of buildings.

Source	Data date	Range given
Plus Property	Updated 10 July 2026	Bangkok average 35 to 45 baht per square metre per month, top tier 95 to 150 baht
Sansiri	Updated 24 November 2025	40 to 85 baht per square metre per month
Superagent	No date given	Budget buildings 25 to 40 baht, mid tier 50 to 70 baht, high end 100 to 200 baht
CondoDee	Published 1 May 2025	Budget 20 to 30 baht, mid range 35 to 50 baht, luxury 60 to 90 baht and above
PropertyScout accumulated market data	From earlier research	Broad market range roughly 23 to 75 baht per square metre per month

The right way to use this is not to pick one range as the standard and treat everything else as an outlier. Read all five together as evidence that the market spreads from roughly 20 baht to 200 baht per square metre per month, then change the question. Ask the building for its current rate schedule and its annual budget instead of hunting for an average that does not exist.

The higher the tier, the less predictable the number

Line the five ranges up and a pattern appears that none of these sources points out. At the budget end the sources agree closely, clustering between 20 and 40 baht, a combined spread of about 20 baht. At the luxury end they run from 60 baht all the way to 200 baht, a combined spread of about 140 baht, seven times wider.

The practical reading is straightforward. If you are looking at budget or mid tier stock, a published benchmark is close enough for a first estimate. If you are looking at the high end, estimating from a benchmark can be off by thousands of baht a month, and only the building's own figure will do.

2. Fees by building grade against price per square metre

Knowing that a grade charges a certain number of baht still does not tell you whether it is expensive, because a building charging 130 baht per square metre is usually one where each square metre is worth several times more than in a building charging 30 baht. So we paired each grade's fee range with the price per square metre range for that same grade, using the market segmentation Scope Collection published on 2 June 2026, then converted the result into a share of unit value per year.

Economy Class

Metric	Economy Class figure
Price per square metre	50,000 to 80,000 baht, midpoint 65,000 baht
Common fee per square metre per month	20 to 40 baht, midpoint 30 baht
Annual fee as a share of unit value	0.55 percent

Main Class

Metric	Main Class figure
Price per square metre	80,000 to 120,000 baht, midpoint 100,000 baht
Common fee per square metre per month	35 to 70 baht, midpoint 52.5 baht
Annual fee as a share of unit value	0.63 percent

High Class

Metric	High Class figure
Price per square metre	160,000 to 250,000 baht, midpoint 205,000 baht
Common fee per square metre per month	50 to 90 baht, midpoint 70 baht
Annual fee as a share of unit value	0.41 percent

Luxury Class

Metric	Luxury Class figure
Price per square metre	250,000 to 350,000 baht, midpoint 300,000 baht
Common fee per square metre per month	60 to 200 baht, midpoint 130 baht
Annual fee as a share of unit value	0.52 percent

What the four grades together tell you

The headline rate varies more than fourfold between the bottom grade and the top one. Converted into a share of unit value per year, all four grades collapse into a narrow band of 0.41 to 0.63 percent. That is the real answer to the question of how much is too much. A fee is not expensive because the per square metre figure looks high. It is expensive when it is out of proportion to the value of the square metres you own.

One caveat before you use these figures. They come from the midpoints of two ranges, so treat them as a screening rule of thumb rather than an accounting standard, and not as any assurance about what a particular building will charge.

3. What does the fee cover and what is not included?

Inside the fee

Plus Property, updated 10 July 2026, breaks the spending down roughly as 65 percent on building management and security, 20 percent on common area utilities, 10 percent on maintenance, and 5 percent on resident activities and sundries.

• Round the clock security, CCTV, and lobby staffing
• Cleaning of shared areas and landscaping
• Operation and servicing of lifts, fire systems, and water pumps
• Electricity and water for common areas, including the pool and gym
• Salaries for the juristic person manager and the building's admin and accounting work

Outside the fee, where budgets usually slip

• Electricity and water inside your own unit, with the average residential tariff for the May to August 2026 cycle at 3.95 baht per unit and new cycles announced periodically
• Land and building tax, where a property that is not your registered principal home is taxed from the first baht at 0.02 percent, so a 3,000,000 baht unit costs about 600 baht a year
• The sinking fund, which is billed separately and covered in the next section
• Repairs and replacements inside the unit, from air conditioning to water heaters to bathroom fittings
• Your own contents and unit insurance, which is separate from the building policy the juristic person holds

4. What is the sinking fund and why is it billed separately?

Paid once on transfer, and not refunded when you sell

The sinking fund is a capital reserve for the large, infrequent jobs, replacing lifts, repainting the facade, renewing pipework. It is distinct from the common fee, which pays for day to day operations. Silverman, published 4 August 2026, puts the customary rate at roughly 500 to 800 baht per square metre, collected once when you buy a new unit, and not returned when you sell it on.

The legal basis buildings rely on is Section 40 of the Condominium Act, which requires co-owners to contribute start-up capital under the building's regulations. CheckRaka notes that in newer projects the sinking fund commonly lands at about ten times the monthly common fee, and Silverman offers a useful health check, that a building's total reserve should hold at least ten times its monthly common area expenses.

When the reserve runs low the juristic person can call for more, but only by resolution of the general meeting. That is exactly why you should ask for the current reserve balance before you commit. A depleted reserve means a realistic chance of a special assessment landing on you later.

The transfer-day cash nobody budgets for

Take a 35 square metre unit priced at 3,000,000 baht. A sinking fund at 500 to 800 baht per square metre comes to 17,500 to 28,000 baht. Add a year of common fees in advance at 50 baht per square metre, another 21,000 baht, and the bill payable to the juristic person on transfer day lands at roughly 38,500 to 49,000 baht.

Compare that with the Land Department side. A Thai individual buyer who qualifies for the reduced transfer and mortgage registration fees of 0.01 percent each, which the cabinet extended to 30 June 2027 for units priced up to 7 million baht, pays a combined 570 baht on a 3,000,000 baht unit with a 2,700,000 baht loan. Under that measure the juristic person's bill is roughly 67 to 86 times the government fee, which reverses the picture most buyers carry in their heads.

Two points that apply only to foreign buyers

First, that reversal does not apply to you. The reduced fee measure is limited to Thai individual buyers, so a foreign buyer paying cash for the same 3,000,000 baht unit faces the standard 2 percent transfer fee of 60,000 baht. The juristic person's 38,500 to 49,000 baht then sits at roughly two thirds to four fifths of the government fee rather than dozens of times above it. Both bills are real, and both belong in your transfer-day budget.

Second, the common fee and the foreign ownership quota are both measured in square metres. The 49 percent quota is calculated on floor area rather than on unit count, so a larger unit consumes more of the building's foreign quota and generates a larger monthly fee at the same time. If a transfer date slips because arrears need clearing, funds you have already remitted sit idle in Thailand, so ask the seller or developer to confirm in writing that the quota still covers your unit on the new date.

5. What happens when fees go unpaid and how does it affect selling?

Section 18/1 of the Condominium Act sets the surcharge on arrears at up to 12 percent a year, rising to up to 20 percent a year once payment is six months overdue, calculated without compounding. The juristic person can also suspend access to shared services and common property such as the pool, the gym, and function rooms, though Supreme Court decisions cited by TREBS confirm it cannot bar an owner from their own unit.

The heaviest consequence arrives at sale. Section 29, second paragraph, requires a debt-free certificate from the juristic person before ownership of a unit can be registered to a new owner. A unit carrying arrears therefore cannot be transferred until the balance is settled, which in practice makes unpaid common fees behave like an encumbrance running with the unit.

The practical advice for buyers and sellers alike is the same. Request the debt-free certificate well before the transfer appointment rather than on the day. Many buildings take several working days to issue it, and if the balance turns out to be disputed there will be no time to resolve it.

6. Which warning signs mean a building is charging too much?

A ten second test you can run yourself

Take the monthly rate per square metre, multiply by 12, then divide by the price per square metre of the unit. That gives you the annual fee as a share of what the unit is worth. Based on the four grade comparison above, a normal result falls somewhere around 0.41 to 0.63 percent a year. Anything above 0.8 percent a year deserves an explanation before you commit.

Run it on the same example. A 35 square metre unit at 3,000,000 baht works out to roughly 85,700 baht per square metre. At 35 baht per square metre the annual fee is 14,700 baht, or 0.49 percent of unit value, comfortably inside the band. At 50 baht it is 21,000 baht, or 0.70 percent, already above it. At 75 baht it is 31,500 baht, or 1.05 percent, high enough that there had better be a reason.

Legitimate reasons do exist. A saltwater pool system, several storeys of sky garden, or a very low unit count that pushes cost per unit up naturally will all show up in the rate. The warning sign is not a high number. It is a high number that nobody at the building can account for.

Five questions to ask the juristic person before you pay a reservation fee

• What is the current rate per square metre per month, and when was it last increased
• What is the sinking fund balance today, and how many months of common area expenses does it cover
• What percentage of billed common fees was actually collected over the past year
• Which major maintenance works are scheduled in the next three years, and will they draw on the reserve or trigger a special assessment
• May I see the financial statements and the minutes of the last two general meetings

The third question is the one that tells you the most. A building that fails to collect a meaningful share of what it bills, year after year, will eventually have to raise the rate on the owners who do pay on time, however reasonable today's rate looks.

7. How much does the common fee cut your rental yield?

For buy to let investors the common fee is not a household expense, it is a direct deduction from yield. Using the same example, a 35 square metre unit at 3,000,000 baht letting at 12,000 baht a month earns 144,000 baht a year, a gross yield of 4.8 percent.

At a rate of 50 baht per square metre the annual fee of 21,000 baht takes 0.70 points off that yield. If the building charges 75 baht rather than 35 baht, the difference is 16,800 baht a year, or 0.56 points of yield, which compounds to 168,000 baht over ten years.

These figures are a calculation under the stated assumptions, not a promise that actual returns will come out this way. Rent, vacancy, and the fee itself can all change from year to year. For a location by location view, PropertyScout's guide to buying property in Thailand walks through the wider cost picture before you commit.

Frequently asked questions about the condo common area fee

How is the condo common area fee calculated, how much per square meter

It is your unit size in square metres multiplied by the building's monthly rate per square metre. Across Bangkok those rates run from roughly 20 baht to 200 baht per square metre per month depending on the grade of the building and the amenities it runs. A 35 square metre unit at 50 baht therefore pays 1,750 baht a month, or 21,000 baht a year.

Does the tenant or the owner pay the common fee

By law the obligation sits with the co-owner, because it attaches to ownership. In practice some leases pass the cost to the tenant, so read that clause carefully before signing. If the lease is silent on it, treat it as the owner's cost.

Do I still pay if I never occupy the unit

Yes. The obligation follows ownership, not use. Even units a developer has not yet sold generate the fee, and the developer carries it until those units find a buyer.

Can the building raise the fee on its own

No. Any change to the rate, and any special assessment, requires a resolution of the general meeting of co-owners. If you are told the rate has gone up, you are entitled to see the minutes recording that resolution.

Can I sell a unit that has unpaid common fees

You can agree a sale, but ownership cannot be registered until the arrears are cleared and the juristic person issues a debt-free certificate. The amount to clear includes the surcharge under Section 18/1, which reaches up to 20 percent a year once payment is more than six months overdue.

Summary

The condo common area fee is simple to calculate and easy to underestimate. The formula is one line, unit size times the rate. The question that actually affects your money is whether that rate is proportionate to what your square metres are worth, and the test is that the annual fee should land somewhere near 0.41 to 0.63 percent of unit value, with anything above 0.8 percent needing an explanation.

Two more things worth carrying with you. The sinking fund plus a year of fees in advance is a substantial transfer-day outlay that rarely appears in cost checklists, and unpaid fees can genuinely block a transfer, so ask for the debt-free certificate early.

When you are ready to compare real stock, the PropertyScout page for condos for sale in Bangkok and the Bangkok rental listings are the fastest way to sanity check what a comparable unit actually earns before you run the yield maths.

Prices and availability are subject to change and are not guaranteed. Property information is general guidance only. This content is not legal, tax, or financial advice. Fee rates, sinking fund amounts, and building regulations differ from project to project, so confirm the figures with the juristic person of the specific building before you decide.