1. SUMIF / SUMIFS
SUMIF and SUMIFS let you total values that meet one or more conditions. They are especially useful in financial planning when analysts need to separate data by department, time period, or expense type without creating multiple reports.
The general form is =SUMIF(range, criteria, [sum_range]) for one condition, and =SUMIFS(sum_range, criteria_range1, criteria1, [criteria_range2, criteria2]...) for multiple conditions.
For example: =SUMIFS(C2:C100, A2:A100, "Marketing", B2:B100, "Q2") calculates all marketing expenses in the second quarter. An FP&A analyst can use this to compare campaign costs against budget, highlight overspending early, and feed the results directly into monthly variance analysis.