Sentence:  Business loans generally are repayable in regular installments - usually monthly , including interest at the rate of 5 - 1/2 percent per annum on the unpaid <WSD>balance</WSD> - and have a maximum maturity of 10 years ; the term of loans for working capital is 6 years . 
Meaning of the word marked with <WSD> tags:  equality between the totals of the credit and debit sides of an account