New Delhi-State Bank of India said in a release that customers in metro and urban centres will now have to pay Rs 15 per month plus GST. Earlier the charges were Rs 50 per month plus GST. Bank has cut down the charges for non-maintenance of average minimum balance in its savings accounts by up to 75 per cent.For semi-urban centres, the charges have been reduced from Rs 40 to Rs 12 per month plus GST and for rural centres.