# Account structure

Tyro supports businesses of various shapes and sizes with different needs and levels of complexity.
In practice, this means a business's Tyro account can be made up of one or more MIDs, with each
terminal paired to exactly one of them.

## MID and TID

- **MID** — Your business is represented by a Merchant ID (MID), which reflects the legal entity
that requested the payment facility.
- **TID** — Each individual terminal is represented by a Terminal ID (TID), and is paired with a
MID.


![A single MID connected to multiple TIDs, each representing one paired terminal](/assets/mid-tid-structure.fd721a1a3d77c3630ec3a3cad63ddf3632638dd58d3cec5bd62291ebd0c1be20.68286485.svg)

From a regulatory perspective, it's important that a terminal is paired with a specific MID. For
example, an Australian pub might have separate areas for dining, alcohol, and gambling, each
serviced by its own terminals so that revenue from each area is settled under the correct MID.

## How a structure gets configured

Onboarding
During onboarding, the structure of the business is configured. For most simple businesses this is
configured automatically; more complex businesses are supported through Tyro's account management
team.

MIDs issued
A single-location business typically operates under one MID with one or more TIDs attached to it.

Businesses with multiple locations, separate trading entities, or different pricing arrangements per
site are typically issued a separate MID for each, so that transactions, fees, and settlement can be
reported and funded independently.

Terminals paired
Each terminal is paired to one MID, which fixes where its transactions settle.

Adding a new MID, or moving a terminal to a different MID, isn't a self-service change in the POS —
it's actioned by Tyro's account team, since it affects settlement, funding, and the merchant
agreement behind each MID.