Question 1

Is the coupon applied before or after discount?

Accepted Answer

This calculator applies the main discount first, then applies the coupon to the discounted price.

Question 2

Is sales tax calculated before discount?

Accepted Answer

No. Tax is calculated on the post-discount taxable amount in this calculator.

Question 3

Can discount and coupon together exceed 100%?

Accepted Answer

Each percentage is clamped between 0 and 100. Sequential discounts reduce the remaining price and do not create a negative price.

Question 4

Does this work for GST pricing?

Accepted Answer

Yes. Select GST 5%, 12%, 18%, or 28% to add tax after the discount and coupon are applied.