This document presents a model analyzing absolute convergence of sectoral productivity at the regional level in Portugal based on neoclassical theory. The model uses a linear equation to examine convergence for each economic sector in Portugal's NUTS II and NUTS III regions from 1986 to 1994 and from 1995 to 1999. The results show stronger signs of convergence in the first period than the second period, with evidence of absolute convergence only for agriculture, industry and manufacturing in the second period at the NUTS II level. At the finer NUTS III level, the results for 1995 to 1999 were more satisfactory.