Educational debt as part of household debt remains a problem for Thailand. The significant factors of household characteristics with regard to educational debt are shown by constructing a Tobit-piecewise regression for three different clusters, namely poor, middle and affluent households in Thailand. It was found that household debt is likely to be significant for educational debt in all clusters, with much greater effect in poor households. Household income directly influences the educational debt in households with only moderate economic status. Nevertheless, the result of this study indicates that an effect of the administrative area on educational debt was not found.