Managing Global Mobility at an investment bank, where deferred compensation was a large and important component of compensation, I would spend weeks each year calculating and reporting vests and exercises for my expat population. As the numbers fell into place and the tax liabilities were calculated and paid, I would start the process of allocating the amounts across cost centers, and I’d cringe to myself knowing that these business line managers had no idea they were about to receive this hit to their budgets.