Customer Discount
Apply a loyalty discount to a subtotal and then add sales tax.
About Customer Discount
The member discount is subtracted from the subtotal first, then the sales tax is applied to the reduced amount. Loyalty discounts usually apply before tax, so this order matters and is exactly how most checkout systems bill it.
Formula
Customer Discount
Discount = subtotal x rate%; total = (subtotal - discount) x (1 + tax%)
- customer discount
- Loyalty or membership percent off the subtotal
Worked example
With the default values below, Customer Discount returns Discounted Subtotal of $54.00. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Subtotalminimum 0
- 60
- Customer discountaccepts 0–100 %
- 10 %
- Tax rateaccepts 0–100 %
- 8 %
Results
- Discount Amount
- $6.00
- Discounted Subtotal
- $54.00
- Total With Tax
- $58.32
Step by step
- 1Values used
- 2Customer Discount
- 3Discounted Subtotal= 54.00
- 4Discount Amount= 6.00
- 5Total With Tax= 58.32
Assumptions and limits
- The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, fees or charges or compounding frequency into account.
- Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
How is Customer Discount calculated?
Discount = subtotal x rate%; total = (subtotal - discount) x (1 + tax%) The member discount is subtracted from the subtotal first, then the sales tax is applied to the reduced amount.
Why does Customer Discount matter?
Loyalty discounts usually apply before tax, so this order matters and is exactly how most checkout systems bill it.
What values do I need to enter?
This calculator takes 3 inputs: Subtotal, Customer discount, Tax rate. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.