Updated: January 16, 2026 2:56pm

Prism Users Guide - Chapter 5. Taxes
5.7.1 New Tax Rule

In Admin Console - Node Preferences - Transactions - Taxes - General, select the desired Tax Area from the drop-down. Click the Add button. The Add Tax Rule screen is displayed:
Enter a Name for the tax area.
In the Tax Rule Code drop-down, select the tax code that this rule will be applied to.
A set of check boxes let you designate the type of rule: Luxury, Rebate, or VAT Margin.
For each Threshold field, enter the amount at which the rate will be applied.
Note: Threshold 1 should be less than Threshold 2, and Threshold 2 less than Threshold 3.
Add Tax Rule screen:
Edit tax rule modal
Tax Rule Fields

Field Description
Name Name of the tax area. Maximum 30 characters.
Tax Rule Code  A Tax Code is a label that designates the type of tax, if any that should be applied to the item. Each item is assigned a Tax Code. By default, items are assigned a Tax Code of TAXABLE. Each Tax Area can have its own rate defined for the TAXABLE Tax Code. Other default Tax Codes in Prism include EXEMPT.
Luxury If selected, indicates that the tax rule will be applied as "Luxury Tax. Enabled = Apply tax as Luxury Tax. A Luxury Tax is different than a regular Sales Tax in that a Luxury Tax is typically only applied to the portion of an item's price above a certain threshold. This enables governments to tax so-called luxury items at a higher rate.
Rebate Designates whether or not taxes applied by the Tax Rule can be rebated with Tax Rebate. Enabled = Taxes applied with this rule can be rebated.
VAT Margin Designates whether VAT based tax values are calculated from the margin values. Normally with VAT you have a fixed sale price, a fixed VAT percentage and then calculate the price without tax from that (P$T$ - (P$T$ * VAT) = P$). If the "VAT Margin" option is selected in Prism Node Preferences > Taxes > Tax Areas, Prism will use the following calculation: (P$T$ - Cost) * Tax% / (100%+Tax %).
Threshold 1 Designates the threshold in which Tax Rate 1 begins to be applied
Rate 1 Designates the Tax Rate to be applied upon meeting Threshold 1. The actual methods for determining which portions of sale are taxed at Rate 1 may vary, depending on various settings. Specifically, the Luxury Tax flag determines if the rate slides fully or is segmented.
Threshold 2 Designates the threshold in which Tax Rate 2 begins to be applied.
Rate 2 Designates the Tax Rate to be applied upon meeting Threshold 2. The actual methods for determining which portions of sale are taxed at Rate 1 may vary, depending on various settings. Specifically, the Luxury Tax flag determines if the rate slides fully or is segmented
Threshold 3 Designates the threshold in which Tax Rate 3 begins to be applied.
Rate 3 Designates the Tax Rate to be applied upon meeting Threshold 3. The actual methods for determining which portions of sale are taxed at Rate 1 may vary, depending on various settings. Specifically, the Luxury Tax flag determines if the rate slides fully or is segmented
Char Some countries have a tax requirement to show items that are taxable or non-taxable on the Receipt when both types are sold on the same transaction. The Char field is used to satisfy this requirement.
Message Enter a string of characters. The characters can be printed along the bottom of the receipt as a Tax Code Legend (for example, "Non-taxable Item").

N