🧾 Margin and Sales Tax Calculator
Calculate your profit margin and the final customer price after sales tax, all in one place.
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Margin and Sales Tax Calculator
This calculator combines two common retail calculations: your profit margin on a sale, and the final price a customer pays once sales tax is added.
The Formula
Profit = Selling Price – Cost. Margin = (Profit ÷ Selling Price) × 100. Sales Tax Amount = Selling Price × Sales Tax Rate. Final Price = Selling Price + Sales Tax Amount.
Note: This tool is for general business and educational purposes only; actual sales tax rates and rules vary by location and product type.
Last reviewed August 2026