Small and Medium Enterprises are the major engine room for growth of every nation.In recent times, studies have shown that business processes have become complex and these have affected the sustainability of SMEs. Changes in business processes require organizations to be dynamic and exploit opportunities perceived to influence performance of small and medium enterprises (SMEs). The study examined the effect of financial reengineering on the growth in performance of SMEs in Nigeria. The study employed survey research design. The sampled population was 11,663 SMEs in Lagos State,the business heartbeat of Nigeria. Using Taro Yamane formula, Sample size was 387. The owners/managers of these SMEs were selected through a multi-stage sampling technique involving stratified and proportionate sampling method. 387 copies of structured questionnaire were administered with a retrieval rate of 100%. Cronbach alpha coefficient ranged from 0.707 to 0.832. Descriptive and inferential statistics were used for data analysis. The findings revealed that financial re-engineering has significant effect on sales growth of SMEs.........