Let me put it in points
1. Any input or capital goods if consued captively with in the factory of production is not liable for Excise duty,provided the final product is dutiable and duty is paid. [Notification No.67/95-C.E dated 16.3.1995]
2. Related party Sale - Assessable value is the cost of production on which ED is to be paid. Say. COP is Rs 100 . ED on Rs 100 need to be paid.
3. Related party captive consumption - Assessable value is COP * 110%. Say, COP is 100. AV is Rs 110 and ED to be paid on Rs 110.
4. Captive consumption means consumption of goods manufactured by one devision and consumed by another devision(s) of the same organisation or related undertaking for manufacturing another Product(s).
5. If it is the case of captive consumption, there is no question of sale and profit margin , as the goods are being used in the factory for further production.
6. If a proper sale is being made to your related party, then it is NOT captive consumption and the rule of 110% is not applicable.
Kindly analyse you fall under which aspect.
Thanks.