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Delaware Cities Income Tax Information (Wilmington)
Additional Delaware Formulas:

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State/City Codes

City Tax Status
10/0490
Duty Station and Residence/mandatory
Withholding Formula (Effective Pay Period 12, 1983)
  1. Multiply the gross biweekly wages by 26 to obtain the annual wages.

  2. Multiply the annual wages by 1.25 percent to calculate the Wilmington city income tax withholding.

  3. Divide the annual Wilmington city income tax withholding by 26 to obtain the biweekly Wilmington city income tax withholding.