How to connect your POS to accounting software

Every hospitality business has a POS and accounting software. Very few have them connected. The data that lives in one is reproduced manually in the other — or is not reproduced at all, and the two systems tell different stories.

Connecting them is not technically complicated. The challenge is finding the right intermediary and getting the configuration right so the data that flows is accurate and useful.

Why the connection matters

The POS is the source of truth for your sales. It records every transaction: the time, the category, the payment method, the VAT, the discounts applied. This information exists in digital form the moment the transaction happens.

Your accounting software is where this information needs to land: as a journal entry that splits revenue by category, records VAT correctly, and matches payment methods to the corresponding bank or card account.

Without a connection, a manager or bookkeeper copies these figures from a POS report into the accounting system. This manual step introduces delay and error risk. It also loses granularity: the summary that gets entered into the accounts is often less detailed than what the POS produced, because the person doing the entry simplifies to what they think the accounts need.

With a connection, the POS data flows automatically. The journal entry is produced from the POS data directly, without interpretation or simplification. The accounts receive exactly what the till recorded.

What a direct connection requires

A direct connection between a POS and accounting software requires an API at both ends and a defined mapping between the two data structures.

Most modern POS systems — Lightspeed, Square, Tevalis — expose an API that allows other systems to pull sales data. Most accounting platforms — Xero, Sage, QuickBooks — expose an API that allows journal entries to be posted programmatically. Understanding how POS, inventory, and finance work together as three connected systems helps clarify what the mapping needs to achieve.

The challenge is the mapping. The POS organises revenue by categories and payment methods. The accounting system organises it by nominal codes. Someone has to define which POS category maps to which nominal code, which payment method maps to which clearing account, and how VAT is split and posted.

Done correctly once, this mapping runs without intervention. Done incorrectly, it produces journals that look complete but contain miscoded transactions that distort the accounts.

The intermediary approach

Most hospitality operators do not connect POS to accounting software directly. Instead, they use an intermediary: an operations platform that sits between the POS and the accounts.

This approach has practical advantages. The POS produces raw transaction data. The operations platform processes this data — applying category logic, calculating GP, managing stock deductions — and produces a clean, structured journal entry for the accounting system. The accounting system receives accounts-ready data rather than raw POS output.

The intermediary also handles the other data flows that the POS cannot. Supplier invoices, inventory movements, wastage records — none of these originate in the POS, but all of them need to reach the accounting system. An operations platform that manages all these flows produces a comprehensive accounting integration, not just a sales feed.

What to look for when evaluating integrations

Not all integrations are equal. When evaluating whether a POS-to-accounts integration will do what you need, three questions matter.

What does it actually send? Some integrations send a single daily revenue figure. Others send a full journal split by category, payment method, and VAT rate. The former is little better than a bank feed. The latter is what makes the accounts genuinely useful.

When does it send? Nightly is standard for session-based POS systems. Real-time is better for operations with multiple sessions or variable closing times. Understand the timing so you know when the accounts are current.

What happens when something goes wrong? Failed posts, duplicate entries, and mapping errors happen. The integration needs to handle them gracefully and give someone visibility when they occur. An integration that silently fails is worse than no integration at all.

The bank feed is not enough

A bank feed connects your bank account to Xero and pulls in transactions automatically. It is useful for reconciliation but it does not replace a POS integration.

A bank feed tells you that £4,320 arrived in your current account on Tuesday. It does not tell you that this represented £2,100 in food revenue, £1,680 in drinks revenue, and £540 in a card processing fee that should be coded separately. That breakdown comes from the POS. Without a POS integration, the bank feed data has to be manually categorised — which is precisely the work the integration should eliminate. For more on what Xero integrations actually do for restaurant accounts, the category mapping question is worth understanding before you begin.

Hops connects to Lightspeed, Square, and other major POS systems and sends structured sales journals to Xero automatically. The mapping from POS categories to nominal codes is configured once. After that, the accounts receive the POS data every night without manual intervention.