Chartered Accountant
                
                   1948 Points
                   Joined October 2012
                
               
			  
			  
             
            
             There are two transactions here. One is incurring of expenditure outside India. Second one is the reimbursement received from your client in India.
As far as first transaction is concenred, depending on the nature of expenses, place of provision of service (POPS) shall be determined. POPS in most of the expenses like lodging, traveling and food would be outside taxable teritorry and hence not subject to service tax.
In second case, as far as you are acting as a pure agent the reimbursement amount shall not be included in taxable value in terms of ST determination of value rules (Rule 5(2)).