Calculate Pre-Tax and Post-Tax

Calculate Pre-Tax

• Pre-tax amounts are applied to an item subtotal. Once pre-tax is calculated, regular taxes are applied.
  For example, on a $20 item calculate a regular tax of 10% after applying a 4% pre-tax: ($20 + 4% pre-tax = $20.80) + 10% overall tax = $22.88. The total tax for this transaction is $2.88.

Calculate Post-Tax

• Post-tax is an additional tax calculated after regular taxes are applied.
  For example, on a $20 item calculate a regular tax of 10% + a 4% post-tax: $20 (10% regular tax + 4% post-tax) = $22.80. The total tax for this transaction is $2.80.