If you are writing the correct formula and when you update sheet, the SUMIF function doesn't return updated value. It is possible that you have set formula calculation to manual. Press F9 key to recalculate the sheet. Check the format of the values involved in the calculation.

Why Excel sum is not working?

Possible cause 1: Cells are formatted as text

Cause: The cell is formatted as Text, which causes Excel to ignore any formulas. This could be directly due to the Text format, or is particularly common when importing data from a CSV or Notepad file. Fix: Change the format of the cell(s) to General or some other format.

How do I get Sumif to work?

If you want, you can apply the criteria to one range and sum the corresponding values in a different range. For example, the formula =SUMIF(B2:B5, "John", C2:C5) sums only the values in the range C2:C5, where the corresponding cells in the range B2:B5 equal "John."