What are the new financial requirements for extending my visa in Thailand?

Thanks all for helpful comments

I went have been 6 times in the last 12 months ,4 x 2 weeks and 2 x 4 weeks and nothing was said at immigration

Good luck!

In that state all up to immigration officer in front of you, either they have a good hair day or a bad one and make you problem

I used to enter every 8 weeks for 2 weeks - visa exempt. I once asked an I.O. at the airport if I would have a problem at some point doing that. He looked at my entry history and told me I would have no problem as I left for 8 weeks - what they were looking for was people who were spending long periods in the country, doing visa runs etc. - they were suspected of in fact living in Thailand and/or working illegally. I think that would still be valid but they have been making a lot of noise about clamping down recently - how much of that will be put into practice remains to be seen but just make sure you have all the usual entry requirements with you. I was though - eventually warned about entering visa exempt as they spotted some previous Non O's in my history and guessed I was visiting my wife. I was told to get a visa.

If you've got a visa it is different to entering with no visa.

A lot of people get confused over the names of types on entry. For tourism, there's visa exempt, visa on arrival and visa. Citizens of some countries need to apply for a visa on arrival, others have to apply for a visa for any travel at all and some need to apply for a visa for specific purposes or longer periods. UK citizens can currently enter visa exempt for 60 days (probably dropping to 30 shortly) or apply for a specific visa if they either want to stay longer or wish to enter for a purpose other than tourism. I know many, including myself, have entered visa exempt to visit their Thai wife but technically that is against the rules, they should apply for a Non O (an Immigration Officer's words, not mine).

Visa exempt will be 30 days (currently still 60) so yes, no problem.

A calendar year is irrelevant. If you are entering visa exempt the immigration officer will look at your history over the past 12 to 18 months and make a judgement based on that. If that history is under around 150 days or less you should be OK but it always pays to have the 3 proofs available... 20k baht or equivalent in cash, a ticket out and accommodation booked

Do you mean a Visa on Entry is a Tourist visa from the eVisa website?

yes as long as your past 12 to 18 month history of tourism visits doesn't look like you're abusing the system in the eyes of the IO