# Gratuity and service charges

Configure tips and mandatory service charges for Oracle Simphony POS+.

## Overview

Oracle Simphony manages gratuity and mandatory service charges in the POS workflow. Amounts are passed to POS+ in the SPI message and included in the authorisation sent to your acquirer.

## Gratuity (tips)

### Simphony configuration

Configure tip options in Oracle EMC:

1. Go to **Setup > Order Type Parameters**.
2. Set the tip percentage options for your venue.


When the cashier selects a tip in Simphony, the tip amount is included in the SPI payment request and in the authorisation sent to your acquirer.

Oracle Simphony v19.9 is recommended for the latest gratuity handling. See [Requirements](/guides/point-of-sale/pos-plus/oracle/how-it-works#requirements).

## Mandatory service charges

Mandatory service charges configured in Simphony (e.g., a fixed percentage for large parties) are passed through in the SPI message. Apply a charge as follows:

1. Configure the service charge rules in Simphony for your venue.
2. When a charge applies, Simphony includes the amount in the payment request.
3. POS+ includes the charge in the authorisation sent to your acquirer.