Thailand’s population is aging rapidly. As of 2011, statistics have shown that there has been a constant increase in the percentage of the population aged 60 and older. This study evaluates the causal issues of income deficiency among the elderly in Thailand. The timeline for the study includes two national representative surveys of elderly people, one in 2007 and another in 2011, with double-stage sampling techniques being utilized. The sample is comprised of 30,427 and 34,173 participants in 2011 and 2007, respectively, all aged 60 years and older. SPSS 18 was employed for logistic regression and cross-tabulation analysis. A general decrease in income deficiency was observed in 2011 (38.6%) compared to 2007 (41.9%). The northern region exhibited a higher prevalence of income insufficiency compared to the southern region. Regardless of the prevailing benefit policies for the elderly, the current results demonstrate the need for an augmented government policy that supports elderly individuals facing income deficiency.