I thought it was worthwhile posting this link for anyone who hasn't seen it before, saves a lot of running around the different banks and having those sometimes bizarre conversations with bank staff about what rates of return they have currently.

http://www.bot.or.th/english/statistics/financialmarkets/interestrate/_layouts/application/interest_rate/IN_Rate.aspx

Unfortunately they don't provide details of all the specials, so the breakdown is, IMO, useless.

All the main banks have english websites, best check them out.

http://www.krungsri.com/en/banking-rates.aspx

They will give you 3.4% for 11 month deposits, suitable for your retirement visa.