When tech powers the world, CIOs face huge pressure to meet business demands; this only intensifies during macroeconomic uncertainty. When the US introduced sweeping tariffs, fears of an all-out trade war that would cause costs to skyrocket and trigger a recession were high. A 90-day pause took effect in April; by mid-May, the US and China agreed to pause retaliatory tariffs. The speed of tariff implementations, changes, and retaliations in just days underscores the need for scenario planning. CIOs must set exec expectations about the potential impact; test their underlying assumptions in real time; and recommend actions. This report gives CIOs detailed guidance for tariff scenario planning.