OBJECTIVES: To perform a partial economic evaluation of Type 2 Diabetes Mellitus (DM2) as well as its micro and macrovascular complications from the institutional point of view. (Social Security Costarican Register (CCSR)), for the year 2013. METHODS: A partial economic evaluation evaluation analysis was used to analyse the average annual cost for DM2 in costarrican patients. The analysis pays special attention related to the sickness (cardiovascular, renal, microvascular, ophthalmic  complications and acute events). Costarrican literature was reviews to obtain costs for DM2 as for its complications, also clinical practice guides for the use of resources were used and finally, this information was validated with specialist physicians from Costa Rica. Only direct medical costs were used, such as: medications, laboratory and additional studies, medical consults, hospitalizations and material; these were obtained from the Cost Model 2013 of the CCSR such as the Statistical Annual Yearbook. To prove the strength of the analysis, deterministic and probabilistic sensitivity tests were performed.  RESULTS: The average annual cost for DM2 for the year 2013 in Costa Rica was USD $1,466.17. The macro and microvascular complications related to DM2 were more expensive in 2013 for Costa Rica were the following: USD $105,865.80 for haemodyalisis during the first year, USD $21,600.40 for chronic cardiac failure during the first year, USD $15,414.40 for acute myocardial infarction and USD $15,025.39 for amputation. An average, hospitalizations represented a 27% of the resources used for treatment of complications. The sensitivity analysis proved the strength of the costs.  CONCLUSIONS: Despise the lack of information in the literature, this article is the first approximation of costs on DM2 and its complications in Costa Rica for the year 2013.