Do children under 2 years old need a visa when traveling in and out of Thailand?

We’ve just put our 9 month old on my DTV as a dependant.

Coming from the UK

this is how that works Potitato,

If the child is from a nationality where they would get in free stamp (visa exempt) there's no issue taking them out of the country with you and when you guys come back they'd get stamped in free for 60 days on the visa exempt entry program

Then you could let them overstay if you wanted until you were going to get them a visa

OR

you could apply at the immigration office for the in country 90 day Non-O visa based on being the child of a foreigner here on a Non-B visa/work permit (family can get matching visa/extensions)

remember once a child goes on overstay you can't get them a visa in country. You'd have to bounce then out/back to get them OFF the overstay and back on a free stamp entry so you could apply for a visa for them then

I know many foreigners whose children here have multi-year overstays (they are under 15 so can't be fined when they leave) and when they need to get a visa they exit/re-enter

The official rule is children under 15 can't be fined for overstay and children under 18 can't be banned

The question about insurance cover has been raised before. Adults have been refused payment by insurance companies when they have had a motorcycle accident because they were on overstay. Does this also apply to children? No idea.

If the kid is born here they don't need a visa till they turn 18. That said they can't leave the country without losing the privilege

Legally they’ll require a visa to stay 180 days.

That being said, children 14 years of age or younger aren’t prosecuted for overstays currently. There will still be a record of their overstay but they won’t be fined/blacklisted/jailed like an adult would be.

No idea if the same is true if they’re caught by the police “in the wild” as most of the time this comes up when people are “surrendering” to immigration at the airport.