> ## Documentation Index > Fetch the complete documentation index at: https://docs.watt.ma/llms.txt > Use this file to discover all available pages before exploring further. # watt.ma tariff priority explained > Understand the deterministic hierarchy watt.ma uses to pick the applied tariff when several tariffs could cover the same charging session. Several tariffs can theoretically apply to the same charging session on watt.ma. For example, one tariff is attached to an entire site, another to a specific charger, and a third to a driver group. To avoid any ambiguity, watt.ma applies a deterministic hierarchy from the most specific to the most general. This page explains that logic and the special cases to know. ## Priority hierarchy watt.ma evaluates applicable tariffs in the following order. The first tariff found at a given level is the one that is applied. ```text theme={null} 1. Connector (most specific level) 2. Charger 3. Site 4. Driver group 5. Organization (most general level) ``` **General rule:** the closer the level is to the hardware or the driver identity, the higher it takes precedence over upper levels. ## Hierarchy explanation | Level | What it covers | Example | | ---------------- | ------------------------------------------------ | ------------------------------------- | | **Connector** | A specific physical connector on a given charger | The CCS connector on charger `CP-001` | | **Charger** | All connectors of a charger | Charger `CP-001` as a whole | | **Site** | All chargers at the same site | Green Energy Park | | **Driver group** | A set of drivers sharing a profile | Residents of Residence Al Andalous | | **Organization** | All sites and drivers of the watt.ma account | Your entire deployment | If no specific tariff is found at levels 1 through 4, watt.ma falls back to the organization level to apply the configured default tariff. ## Special cases ### Future planned tariff A planned tariff with a future effective date is not applied before that date, even if it is more specific than an active tariff. Make sure the validity period of your tariffs does not leave a gap. ### Several active tariffs on the same scope If two tariffs are active on the same site, the same charger, or the same group, **the most recent** (the one with the most recent creation or last modification date) takes precedence. To avoid conflicts, we recommend deactivating the old tariff before activating the new one. ### Guest versus registered tariffs An unauthenticated driver (charging by QR code without an account) cannot belong to a driver group. In this case, watt.ma ignores the "Driver group" level and falls back directly to the "Site" or "Organization" level. ## Concrete example: Residence Al Andalous Residence Al Andalous has configured three tariffs on the same site: | Level | Tariff | Price per kWh | | ----------------- | --------------- | ------------- | | Site | Public tariff | 2.00 MAD/kWh | | Group "Residents" | Resident tariff | 1.50 MAD/kWh | | Group "VIP" | VIP tariff | 0.00 MAD/kWh | Four session scenarios: 1. **Unauthenticated driver**: charging by QR code without an account. The group is ignored. The site tariff applies: **2.00 MAD/kWh**. 2. **Standard resident**: identified by their RFID badge linked to the "Residents" group. The group takes precedence over the site. Applied tariff: **1.50 MAD/kWh**. 3. **VIP resident**: identified by their RFID badge linked to the "VIP" group. The group takes precedence over the site. Applied tariff: **0.00 MAD/kWh** (free). 4. **Charger with specific tariff**: if an isolated charger has its own tariff at 1.80 MAD/kWh, this charger tariff takes precedence over the site tariff, even for a resident. The resident will pay **1.80 MAD/kWh** on this charger and **1.50 MAD/kWh** on the others. ## Note on product specification The exact hierarchy described in this page is currently undergoing final product specification. If you encounter a case where the applied tariff does not match expectations, or if you need a complex configuration involving several overlapping levels, contact watt.ma support. * Email: [contact@wattsc.com](mailto:contact@wattsc.com) * WhatsApp: +212 770 238 225 Create and configure your base tariffs before defining priority. Detail the price elements activated in each tariff. Learn how to create driver groups with differentiated tariffs. Discover how to bill charger occupation after the charge ends.