Sum values by month

To sum the values by month we can apply multiple Excel and VBA methods

Example: Sum values by month

METHOD 1. Sum values by month using SUMPRODUCT and MONTH functions

EXCEL

=SUMPRODUCT((MONTH(B8:B14)=C5)*C8:C14)

The formula uses a combination of the Excel SUMPRODUCT and MONTH functions to sum the values associated with the specific month. With this formula you only have to select the data (dates and associated values) and the specific month for which you want to sum the values.

METHOD 2. Sum values by month using an Array formula with SUM, IF and MONTH functions

EXCEL

{=SUM(IF(MONTH(B8:B14)=C5,C8:C14,0),0)}

This is an array formula that uses a combination of the Excel SUM, IF and MONTH functions to sum the values associated with the specific month. Given this is an array formula, after entering the formula into a cell you need to click Ctrl + Shift + Enter to make it an array formula.

METHOD 1. Sum values by month using VBA with a For Loop

VBA

Sub Sum_values_by_month()

'declare a variable
Dim ws As Worksheet

Set ws = Worksheets("Analysis")
Set smonth = ws.Range("C5")

'sum values by month using the For Loop
For i = 8 To 14

If Month(ws.Cells(i, 2)) = smonth Then

summonths = summonths + ws.Cells(i, 3).Value

End If

Next i

ws.Range("F7") = summonth

End Sub

OBJECTS
Worksheets: The Worksheets object represents all of the worksheets in a workbook, excluding chart sheets.
Range: The Range object is a representation of a single cell or a range of cells in a worksheet.

PREREQUISITES
Worksheet Name: Have a worksheet named Analysis.
Dates: If using the exact VBA code you will need to capture the dates that you are testing against in range ("B8:B14"). This is especially important for the For Loop to loop through specified rows and columns. In this example we have specified for the For Loop to loop through rows 8 to 14 in column 2 to find all of the dates associated with the third month (March).
Values: If using the exact VBA code you will need to capture the values that you want to sum that are associated with the specified month in range ("C8:C14"), which is the column next to the dates. This is especially important for the For Loop to loop through specified rows and columns. In this example we have specified for the For Loop to loop through rows 8 to 14 in column 3 to find all of the values associated with the dates that fall into the third month (March).

ADJUSTABLE PARAMETERS
Output Range: Select the output range by changing the cell reference ("F7") in the VBA code to any cell in the worksheet that doesn't conflict with the formula.
Date: Select a range that captures the dates that you want to test against by changing the i values that represent the row range and the value of 2 in the Cells reference that represents the column reference. In this example the dates are captured in rows 8 to 14 and column 2, therefore, if you are capturing the dates in different rows you will need to change the From and To i values in the VBA code. If you are capturing the dates in a different column you will also need to change the value of 2 in the Cells reference, to the column that captures the dates.
Values: Select a range of values that you want to sum that are associated with the specified month by changing the i values that represent the row range and the value of 3 in the Cells reference that represents the column reference. In this example the dates are captured in rows 8 to 14 (this example assumes that the dates and values are captured in the same row range, therefore, the row range for both dates and values need to match) and column 3, therefore, if you are capturing the values in different rows you will need to change the From and To i values in the VBA code (this will be the same as for dates, therefore, if you have already changed the i values for the dates no further action is required for the values row range). If you are capturing the values in a different column you will also need to change the value of 3 in the Cells reference, to the column that captures the values.

METHOD 2. Sum values by month using VBA with a formula for SUMPRODUCT and MONTH functions

VBA

Sub Sum_values_by_month()

'declare variables
Dim ws As Worksheet

Set ws = Worksheets("Analysis")

'sum values by month using formula
ws.Range("F7").Formula = "=SUMPRODUCT((MONTH(B8:B14)=C5)*C8:C14)"

End Sub

PREREQUISITES
Worksheet Name: Have a worksheet named Analysis.
Dates: If using the exact VBA code you will need to capture the dates that you are testing against in range ("B8:B14").
Values: If using the exact VBA code you will need to capture the values that you want to sum that are associated with the specified month in range ("C8:C14"), which is the column next to the dates.

METHOD 3. Sum values by month using VBA with a array formula

VBA

Sub Sum_values_by_month()

'declare variables
Dim ws As Worksheet

Set ws = Worksheets("Analysis")

'sum values by month using formula
ws.Range("F7").FormulaArray = "=SUM(IF(MONTH(B8:B14)=C5,C8:C14,0),0)"

End Sub

PREREQUISITES
Worksheet Name: Have a worksheet named Analysis.
Dates: If using the exact VBA code you will need to capture the dates that you are testing against in range ("B8:B14").
Values: If using the exact VBA code you will need to capture the values that you want to sum that are associated with the specified month in range ("C8:C14"), which is the column next to the dates.

Explanation about the formula used to sum values by month

EXPLANATION

EXPLANATION
To sum the values by month we can apply multiple Excel and VBA methods.

FORMULAS
=SUMPRODUCT((MONTH(dates)=month)*values)
{=SUM(IF(MONTH(dates)=month,values,0),0)}

ARGUMENTS
dates: A range of dates to be tested for the specific month.
values: A range of values associated with dates that are to be summed.
month: The month the dates are tested against to return the sum of associated values.