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Wisconsin Department of Revenue

 Check Digit WEIN Formula for WT-6 and WT-7

There is a single space between the WEIN and the check digit (use to be a hyphen).

WEIN Check Digit Calculation

  1. Multiply each digit by a weight pattern of 1, 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.

    Example:       WEIN 123456

    1. 1 X 1 = 1
      2 X 2 = 4
      3 X 1 = 3
      4 X 2 = 8
      5 X 1 = 5
      6 X 2 = 12
    2. Since the product of 6 X 2 is two digits, add the two digits : 1 + 2 = 3
    3. 1 + 4 + 3 + 8 + 5 + 3 = 24
    4. 30 - 24 = 6
    5. 6 is the check digit for WEIN 123456.

FOR MORE INFORMATION PLEASE CONTACT:

WISCONSIN DEPARTMENT OF REVENUE
Processing Bureau 3-14
2135 Rimrock Rd.
P.O. Box 8908
Madison, WI 53708-8908
Telephone: (608) 267-3285
Fax: (608) 264-6884
E-mail: Stefanie Pauls

Last updated November 21, 2007