Also called: Terminal number, Terminal Identification Number, TID
What a Terminal ID is
A Terminal ID, or TID, is a code that identifies the specific point where a card payment entered your processing setup. That point might be a countertop terminal, a mobile reader, an online checkout, or a virtual terminal used for phone orders. Your processor or acquirer assigns the identifier, and the format varies by provider.
A TID is different from your Merchant ID (MID). The MID identifies your merchant account, while the TID distinguishes a device or payment endpoint within that setup. A restaurant with several checkout lanes, for example, can use separate TIDs to trace sales to each lane.
A TID points to the payment endpoint. Your MID points to the merchant account.
How it works
When a transaction is processed, its record includes the TID associated with the device or channel that sent it. That lets you filter processing activity by lane, store, online channel, or virtual terminal instead of searching the entire account. A TID identifies the payment endpoint, not an individual payment.
Keep it separate from a Transaction ID, which identifies a particular payment record or attempt. When you investigate a sale, match the TID with the transaction reference, amount, date, processor, and MID. That combination helps locate the right transaction and payment path.
Illustrative monthly charge for six TIDs
| Active TIDs | 6 |
|---|---|
| Hypothetical fee per TID | $10/month |
| Total | $60/month |
The $10 fee is illustrative, not a standard rate. Actual TID charges and included quantities depend on your processor’s pricing.
What it means for your costs
A TID itself is an identifier, not a card-network fee. Some processors charge a recurring fee for each active TID, so unused devices or old online endpoints can keep adding to your monthly bill. The charge and the number of TIDs included in your pricing depend on your processor’s terms.
For a simple illustration, six active TIDs billed at $10 each would add $60 per month. That is a hypothetical calculation, not a standard rate. Compare the billed quantity and per-TID price with the terminals and payment channels your business still uses.
Where it appears on your statement
Your TID can appear in transaction records, processing reports, or on a receipt labeled “Terminal ID,” “Term ID,” or “TID.” Some customer receipts leave it out. There is no single statement label for a TID charge, but a recurring line described as a terminal fee is worth checking against your active device list.
Do not assume every listed TID is a physical machine. An online store, phone-order desk, or separate checkout integration can have its own identifier. Compare the number of billed TIDs with your terminal inventory and payment channels, then flag IDs tied to closed locations or retired software.
Why it matters to your operation
TID-level reporting helps you narrow down problems. If declines, refunds, or disputes cluster around one checkout lane or online endpoint, you can investigate that location or integration without treating every part of the business as the source of the issue.
Maintain a simple map of each TID to its location or channel, the MID it uses, and the team responsible for it. When you replace a terminal or switch processors, update that map and review the first statement for charges tied to decommissioned IDs.
What you can actually change
- Map each TID. Record the location or payment channel, MID, and team responsible for every active identifier. Include online checkouts and virtual terminals, not just physical devices.
- Audit billed counts. Compare the number of TIDs on your statement with your current inventory. Look for terminal or device fees tied to closed locations, replaced equipment, or retired integrations.
- Close retired IDs. Ask your processor to deactivate TIDs you no longer use, then confirm the billed count and fees on the next statement.
Frequently asked questions
Is a Terminal ID the same as a Merchant ID?
No. A Merchant ID identifies your merchant account, while a Terminal ID identifies a device or payment endpoint within your setup. One MID can be associated with multiple TIDs, such as separate checkout lanes or online channels.
Where can I find my Terminal ID?
Look in transaction records, processing reports, or receipts for a field labeled “Terminal ID,” “Term ID,” or “TID.” Some receipts omit it, so check the transaction details in your processing system if it is not printed.
Does a Terminal ID have a monthly fee?
The identifier itself is not a card-network fee, but some processors charge recurring fees for active TIDs. Check your statement for terminal or device fees and compare the billed count with the devices and payment channels your business still uses.
Is a TID the same as a Transaction ID?
No. A TID identifies the payment endpoint, such as a terminal or online checkout. A Transaction ID identifies a specific payment record or attempt. Keep both with the date, amount, and processor when tracing a transaction.