Exempt income computation for offshore banking unit investment divisions requires formula-based allocation and mandatory electronic filings. Exempt income of a specified fund attributable to an offshore banking unit's investment division is computed as the sum of four components: income from transfer of eligible capital assets on a recognised international financial services exchange paid in convertible foreign exchange; income from transfer of securities excluding Indian resident company shares; income from securities issued by non-residents not accruing in India; and income from securitisation trusts chargeable as business income. Related expenditure is not deductible against other sources. The eligible investment division must maintain separate audited accounts and electronically file Form No. 10-IK and audit report Form No. 10-IL to secure exemption.