This critical step is so often missed and it is the one that allows HR people to actually act as a business PARTNER! Show your internal customers that you can be proactive and strategic by providing them with a comprehensive prediction of assignment cost. Management may decide the assignment is not worth the money. Either way, you have added value and you avoid the calls at year end once management realizes how much this assignee is costing.
Assignment cost projections include the cost of relocation benefits, assignment compensation allowances and home and host tax accrual figures.