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Summary of significant accounting policies (Tables)
 12 Months Ended
Mar. 31, 2020
Schedule of Composite depreciation rate Depreciation is provided over the estimated useful lives of property and equipment on a straight-line basis at the following rates:
Type of Asset
 
Rate of depreciation
 
Premises
   
1.63%
 
Software and systems
   
20.00%
 
Equipment and furniture
   
10.00%-33.33%