Do I need to file a new TM30 every time I re-enter Thailand if registered at my Thai wife's household?

it depends on your Immigration. I got a yellow housebook and pink ID-card, my Immigration wants me to report back for a new TM30 every time I return from abroad. I however would have stayed a few nights in a hotel in Bangkok coming from abroad, before I return to my Isaan address, which means the hotel's TM30 will overwrite my existing TM30 from before. So it is quire understandable why they want me to report back

A TM30 report is generally not required if a foreigner returns to the same address after traveling abroad or visiting another Thai province, provided a valid, initial registration exists. It is also not required for short-term stays where no immigration services (visa extension, 90-day report) are needed.

Key Situations Where a New TM30 is Not Required:

Returning to the same address: If a landlord previously filed a TM30 for your residence, you do not need to refile it upon returning to that same place, including after international travel.

Moving within the same province: While you must technically report address changes, local immigration offices often do not require a new TM30 for short trips within the same area.

Staying in hotels: Hotels are required to report guests, so a personal TM30 filing is not needed for hotel stays.

No Immigration services needed: If you are not extending your visa or doing a 90-day report during a short stay, some areas may not enforce the filing.

Important Nuances:

Local Office Rules: Practices vary by province; some, such as Chonburi/Jomtien, may have specific, differing requirements, with some offices occasionally asking for re-registration after trips.

Initial Requirement: An initial TM30 must have been filed by the landlord for the, "no need to refile" rule to apply.

All aliens must notify immigration of their location via TM30 within 24 hours of arrival into Thailand even if the same address. However some immigration offices allow some discretion if travelling within Thailand. Some even ignore exit and entry. So it just depends. I found it easier just to get my wife to use the app every time I came back.

it is specific to any particular local Thai Immigration Office and more and more Thai Immigration Office require a TM.30

Also, all Thai Immigration procedures and local Thai Immigration offices don't need or care about the Yellow Thai Household Book/Yellow Tabien Baan ( ทร.13 ) and the Pink Foreigner ID Card

what is important and required is a Fresh copy of คร.2 if you have a Thai Marriage Certificate (married inside Thailand) or คร.22 if you have a Foreign Marriage Certificate (married outside Thailand) with your Thai Spouse if you are obtaining a Non–O Visa based on Marriage to a Thai Spouse or an Extension of Stay based on Marriage to a Thai Spouse

I have yellow book and pink Thai ID never had any problems not having TM30 when re entering. 90 day report starts day entered Thailand.

been living in the same house with my wife. In 3 years never filed a TM30. I fly in and out 2 times a month on average- just not practical

Depends on the Immigration office.

Yep

House book has absolutely nothing to do with TM30.