Six if you have land

Since 10 January 2026, dogs and cats in Bangkok have had to be registered and microchipped.

Within 120 days of birth, or 30 days of acquisition. The stated purpose is a central database — so a lost animal can be traced to its household, and an abandoned one to the person who abandoned it.

Maximum penalty for non-compliance: ฿25,000 — and it is not a criminal fine.

And the same ordinance sets how many animals you may keep, by the size of your home.

A rented room or condominium of 20 to 80 square metres: one. Eighty square metres or more: two. Land up to 20 square wah: two. Twenty to fifty square wah: three. Fifty to a hundred: four. A hundred square wah or more: six.

Six tiers, and dogs and cats counted together. That set of numbers is the reason this article exists.

First, the useful part

If you are in Bangkok with a dog or a cat, you are inside a registration regime. Registration and microchipping are required, the deadline for the initial round has passed, and the free microchipping window that ran before it has closed.

Go to your district office and ask. That is the authoritative answer and this article is not one. The penalty is real and the ordinance is in force, so the correct move is to find out where you stand rather than to hope.

But it is worth knowing what the penalty is, because it is milder than the number suggests. The ordinance itself sets no fine — clause 25 simply says breaches are punished under the Public Health Act B.E. 2535 (1992), which is the Act the ordinance is made under. And section 73 of that Act splits local ordinances into two tiers.

Breach of the tier this ordinance is not in — ordinances made under certain other sections — carries up to six months’ imprisonment or a fine of up to ฿50,000, or both.

Breach of an ordinance made under section 29, which is this one, is a ความผิดทางพินัย: a civil penalty offence, with a payment of not more than ฿25,000 and no imprisonment. The Act on Civil Penalties B.E. 2565 (2022) converted fine-only offences into this category and carried the old amounts across as the new ceiling.

So the ฿25,000 is real and it is not a criminal conviction. That distinction is worth having if you are reading this worried, and I have not seen it made in English.

If you were already over the limit before the ordinance began, there is a clause for you and its deadline has gone. Clause 27 says an owner keeping more animals than the new limits before commencement must notify the district office, or notify electronically, within 90 days — by 9 April 2026. You are not required to give any animal up. You were required to say so.

What the ordinance does not say is what happens to a household that did not notify in time, and that is now the question to put to the district office rather than the one this article had.

And dogs registered under the old 2005 ordinance did not need doing again. Clause 26 treats those registrations as registrations under the new ordinance.

What I still could not establish: how the ordinance is being enforced in practice, and how many animals have been registered since January. Neither is in any public record I could find, and I looked at the city’s own publications rather than only at the news.

What a microchip actually does

Now the structural part, and it starts somewhere this archive has already been.

Article 30 Thirteen digits: what a Thai ID number actually tells you was about thirteen digits — the Thai ID number, and the finding that it is not merely an identifier. It is the key. Healthcare, banking, schooling, welfare, property: all of it resolves through the number. Thailand runs on registration, and to be unregistered is to be administratively absent.

Article 82 was about the street dog, and its title was Nobody’s dog.

That title was the finding. A street dog is a policy problem not because it is a dog but because no name is attached to it. No owner means no vaccination record, no responsibility, nobody to bill, nobody to hold to account, and no consequence for whoever put it there. Every part of the problem flows from the absence of an identifier.

A microchip is an identifier.

And this is, unusually for this archive, a register being extended in order to attach accountability rather than to exclude somebody. The animal acquires a number. The number resolves to a person. Abandonment stops being anonymous.

That is a real and sensible thing to have done, and if it works it will do more for Thai street animals than any amount of sympathy has.

And then the floor area

One animal in a 20 to 80 square metre room. Two above eighty. Six if you have land.

The cat, one assumes, is expected to measure the room.

Read that as a sentence about people rather than animals and it becomes something else.

Article 89’s finding is that Thai entitlements are framed as qualifications, and that the qualification is always drawn around people who already had options. Employment status. Workplace. Ability to pay a premium. Article 131 The rule was abolished found a universal health entitlement gated by a document you must collect in person.

This is the same structure with the qualification set to square metres.

It is the most literal version the archive has found. Not income, not employment, not a proxy for either. Floor area, stated numerically, in the regulation.

And it produces the distribution you would expect. Article 43 Empty by the hundred thousand counted sixty thousand empty condominium units; article 129 Have parents when you’re ready found that in Thailand every condition of a stable household is a private cost. The person in a 30 square metre rented room is not there by preference. They are capped at one animal. The person with 100 square wah may keep six.

Whether that is defensible is a real argument and I am not going to pretend it is one-sided. Space genuinely affects animal welfare. A crowded room is bad for the animals in it, and a rule with no numbers in it is a rule nobody can apply. A limit is not an unreasonable instrument.

The observation is narrower: the limit is a property qualification, and property qualifications sort people. Somebody drafting it chose square metres because square metres are measurable — the same reason the land tax in article 136 Two hundred plants per rai chose plants over intentions. Measurable is not the same as fair, and it is not the same as related to the thing you care about.

And there is a second qualification in the ordinance that is sharper than the first.

If you rent, you cannot register your animal without your landlord’s written consent. It is on the list of documents in clause 16, beside the owner’s ID card and the rabies certificate, and it appears again in clause 14 for a transfer to a new owner.

Read that against the rest of the regime. Registration is compulsory. Failing to register is the penalty. And whether you can register at all is, for every tenant in Bangkok, somebody else’s decision.

The floor-area ladder allocates by how much space you have. The consent requirement allocates by whether you own it. Article 89’s category, drawn twice on the same page — and the second one is invisible in every summary of the ordinance I have read.

The part that works against itself

Here is the tension inside the ordinance, and I think it is the most important thing in this article.

The registration provisions exist to prevent abandonment. The numerical limits, applied to households already over them, give some people a reason to abandon.

If you keep three cats in a 60 square metre rented room, the ordinance has made two of them a problem. The compliant response is to rehome them. The cheap response is the one that produced article 82 Nobody’s dog.

The drafters saw this, and clause 27 is the answer to it. Nobody who was already over the limit has to give an animal up. They had to declare, within ninety days, and the ninety days ran out on 9 April 2026.

So the tension is smaller than I first wrote, and it has moved. It is no longer “will people abandon animals to comply”. It is what the position now is for a household that was over the limit, did not declare, and is holding animals the ordinance neither authorises nor requires them to surrender. The ordinance is silent. The district office is the place to ask, and this article is not going to guess.

And the incentive did not vanish; it changed shape. A declaration is a record of being over the limit, attached to a name and an address, made to the authority that can act on it. Some people will have preferred not to make one, and for them the pressure the article describes is exactly as it was — with the added feature that the compliant route is now closed.

One more line drawn by category

Clause 21 says that a person under fifteen or over sixty-five may not take a special-control dog outside the place where it is kept unless it is in a cage or a restraint strong enough to keep it away from other people. Special-control dogs are the breeds the ordinance names — pit bull terrier, bull terrier, Staffordshire bull terrier, Rottweiler, Fila Brasileiro, or others the city announces — and any dog with a history of attacking or trying to attack a person.

The reasoning is obvious and the drafting is a category again. Physical control of a large dog is the thing being aimed at; age is the observable proxy, stated as two numbers, applied to everybody on either side of them. It is the same instrument as the square metres, and it will be right about many people and wrong about many others.

What the enforcement can actually reach

Article 81’s finding and article 134’s, together, predict how this will go.

Registration and microchipping are legible. A chip either exists or does not; a registration either was made or was not. A vet can check in seconds. The state can audit a database. These provisions will be enforced, because they can be.

How many cats are inside a rented room is not legible. Nobody is entering homes to count. That provision will be enforced when something else brings the household to official attention — a complaint from a neighbour, a noise issue, a dispute — which means it will function less as a limit and more as an additional charge available once you are already in trouble.

That is not a criticism of the drafters. It is what happens to any rule about the inside of a home. But it does mean the two halves of this ordinance will behave completely differently, and only one of them will be applied evenly.

There is a third half, and it is the one that reaches the animals in article 82 Nobody’s dog. Section 30 of the Public Health Act says that where an officer finds an animal in a public place in breach, with no owner apparent, it may be detained for at least thirty days; if nobody produces evidence of ownership in that time the animal becomes the property of the local authority. It may be sold or auctioned sooner if detaining it would harm it or cost too much, and an owner who reclaims it pays the actual cost of its keep.

That is the mechanism the microchip plugs into. Before the chip, “no owner apparent” was the normal state of a street animal and the thirty days ran out by default. After it, the phrase means something a scanner can settle.

What I would want to know

How many registrations have been made since January, against an estimate of the Bangkok dog and cat population. That single ratio tells you whether this is a functioning register or a paper one.

Whether abandonment has moved. Shelters and rescue organisations would know before anybody else, and they usually keep records.

And whether anybody has been fined. ฿25,000 is a serious sum. A regime with no prosecutions is article 81 The fine nobody paid again, and a regime with many is a different story worth telling.

Common misconceptions

“It’s voluntary.” Registration and microchipping are required for dogs and cats in Bangkok, with a penalty of up to ฿25,000.

“The deadline is coming.” It was 10 January 2026. The free microchipping window before it has closed.

“There’s no limit on how many pets I can have.” The ordinance sets numerical limits by dwelling size — one for 20–80 square metres, up to two above eighty, up to six on 100 square wah or more.

“The microchip is for finding lost pets.” That is one purpose. The stated aim also includes tracing abandonment to a responsible person.

“Existing pets are obviously exempt.” This article could not establish whether grandfathering applies, which is why it says so rather than reassuring you.