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Wisconsin Department of Revenue

 Wisconsin Tax Account Number Check Digit Formula for WT-6

Wisconsin Tax Account Number Check Digit Calculation

  1. Starting from the furthest most right position, multiply each digit by a weight pattern of 2, 1, 2, 1, 2.
  2. If the product is two digits, add the two digits together.
  3. Now add all digits together .
  4. Take the sum and subtract from the next multiple of ten.
  5. The result is the check digit.

    6. Example:       Wisconsin Tax Account Number 036-1029876543-04

      4 X 2 = 8
      0 X 1 = 0
      3 X 2 = 6
      4 X 1 = 4
      5 X 2 = 10 (1 + 0 = 1)
      6 X 1 = 6
      7 X 2 = 14 (1 + 4 = 5)
      8 X 1 = 8
      9 X 2 = 18 (1 + 8 = 9)
      2 X 1 = 2
      0 X 2 = 0
      1 X 1 = 1
      6 X 2 = 12 (1 + 2 = 3)
      3 X 1 = 3
      0 X 2 = 0
      1. Since the product of 5 X 2 is two digits, add the two digits : 1 + 0 = 1
      2. 8 + 0 + 6 + 4 + 1 + 6 + 5 + 8 + 9 + 2 + 0 + 1 + 3 + 3 + 0 = 56
      3. 60 - 56 = 4
      4. 4 is the check digit for Wisconsin Tax Account Number 036-1029876543-04.

FOR MORE INFORMATION PLEASE CONTACT:

WISCONSIN DEPARTMENT OF REVENUE
Processing Bureau 3-14
2135 Rimrock Rd.
P.O. Box 8908
Madison, WI 53708-8908
E-mail: Fred Bahr
Phone: (608) 266-3120
Fax: (608) 264-6884

Last updated December 12, 2008