I agree with both Sh.Ganeshan Kalyani, Sir and M/s. YAGAY AND SUN, Sirs. I intend to elaborate further. In case the goods are to be transferred to your own unit/sister concern, then Central Excise duty will be paid on 100% plus 10% of cost of manufacture of goods under Rule 8 of Valuation Rules, 2000 and if stock is transferred to a depot, premises of consignment agent or any other place or the premises where the goods are to be sold after clearance from the factory duty will be paid on transaction value under Section 4 of the Central Excise Act. Here you want to transfer the goods to your Head Office which is neither registered as depot nor a unit for captive consumption. Head Office is covered under 'any other place' So method of valuation depends upon how the goods are disposed of from Head Office. On stock transfer basis duty has to be paid since the goods stand removed from the factory and duty is to be paid at the time of removal from the factory whereas VAT is to be paid only at the TIME OF SALE from depot, or any other place where the goods are to be sold. Thus you save VAT for the time being or keep VAT pending till the goods are sold.
So methodology of valuation depends upon how the stock transferred goods are disposed of from Head Office. Normally excisable goods are either transferred to a warehouse or any other place or premises where the goods are permitted to be deposited without payment of duty or are stock transferred to a depot, premises of a consignment agent or any other place or premises from where the goods are to sold after clearance from the factory.