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##### Post-discount and pre-discount calculations

A fixed percent service charge calculates the service charge amount based on the pre-discount or post-discount check total amount, depending on the configuration of the Calculated on pre-discount or post-discount total option. The following example shows how each configuration affects the check's final total amount.

Service charge and check example:

```Check total before service charge and discount are applied = \$10.00
Discount = \$2.00 OFF
Service charge percent amount: 10%
Apply After Amount threshold: \$10.00```

For this example, the calculations for pre-discount and post-discount configurations are as follows:

Service charge configuration = Pre-discount Total

1. Calculate the service charge on the pre-discount check total: \$10.00 * 10% = \$1.00

2. Add the service charge of \$1.00 to the check total: \$10.00 + \$1.00 = \$11.00

3. Deduct the \$2.00 discount from the adjusted check total: \$11.00 - \$2.00 = \$9.00 (final check total)

Service charge configuration = Post-discount Total

1. Deduct the \$2.00 discount from the check total: \$10.00 - \$2.00 = \$8.00

2. Calculate the service charge on the post-discount adjusted check total: \$8.00 * 10% = \$0.80

3. Add the service charge of \$0.80 to the check total: \$8.00 + \$0.80 = \$8.80 (final check total)

Note that the service charge is applied in both cases because the Apply After Amount Threshold (\$10.00 in this example) is always evaluated against the check amount before any discounts have been applied (therefore, the check amount is \$10.00 in both cases).