a standard accommodation 2BHK flat won't cost you less than 6-6.5k (Ask for company accommodation, you'll get what you want and they'll just deduct your housing allowance, which is mostly not enough)
add around 1000 for utilities (Internet, Electricity/Water)
2-2.5k minimum for grocery (depend upon you also)
if you've company provided car, (then you'll save money on taxi)

You can bet something around 17-20k! But that is what I think, maybe you deserve more depend upon the field you're working in!