Using a unique panel of Chinese firms with export and rebates information,we explore the impact of VAT rebate efficiency on firm export.Results show that the rebate efficiency improvement sub-stantially promotes firm export sales.Decreasing delay ratio by 10 percentage points can cause about 15.3%increase in export value.Furthermore,we find the mismatch pattern in allocating rebates:export-ers with tighter financial constraints respond more elastically to rebates delay,yet they are also more likely to have a higher delay ratio.In such case,local governments could promote export by optimizing the rebate allocation under local fiscal constraint.