How Discounts and Sales Tax Work
Whether you are shopping during a seasonal sale or trying to calculate the final invoice amount for a client, understanding the exact sequence of percentage calculations is crucial. The order in which discounts and taxes are applied drastically changes the final price.
The Standard Retail Calculation Order
In almost all retail and wholesale environments globally, the discount is applied first, and the sales tax (or GST/VAT) is applied second.
2. Final Price = Discounted Price + (Discounted Price × Tax %)
Because the tax is applied to the discounted price rather than the original price, you end up saving slightly more money than if the tax was applied upfront. Our calculator handles this specific order of operations automatically.
Why Privacy Matters
Calculating wholesale invoices or large personal purchases involves entering sensitive financial data. This tool runs 100% locally within your web browser using client-side scripts. No data is ever transmitted or logged on external servers.