The inflation rate in Thailand was recorded at -1.27 percent in May of 2015. Inflation Rate in Thailand averaged 4.48 percent from 1977 until 2015, reaching an all time high of 24.56 percent in June of 1980 and a record low of -4.38 percent in July of 2009. Inflation Rate in Thailand is reported by the Bureau of Trade and Economic Indices, Ministry of Commerce, Thailand.