Dismissing the appeal of the revenue the Tribunal held that the assessee did not recover overdue interest from financial year 1996-97 and stopped accounting for it from that year onwards. Collectable is different from accrual. Under the mercantile system, interest income accrues with time. Interest charged and debited to account as income is recognised under the accrual system but not in the cash system. As the overdue interest was not collectable from financial year 1996-97, a prudent businessman, following Accounting Standard 9 of the Institute of Chartered Accountants of India, would not recognise the said income; there was no question of claiming it as bad debt because it was not accountable owing to uncertainty of its collection. (AY. 2009-10 to 2012-13)