A POS (point-of-sale) system is the hardware and software a business uses to take payments, record each sale, and update inventory the moment a transaction happens.
By the Orkids engineering team · Reviewed against BIR RR 11-2025, RMO 9-2021 (POS/CAS), and standard retail-systems practice · Updated June 2026
Table of contents
| Layer | What it does | Examples |
|---|---|---|
| Hardware | Where the sale physically happens | Terminal or tablet, cash drawer, receipt printer, barcode scanner, card/QR reader |
| Software | Records the sale and the rules around it | Item catalogue, pricing, discounts, tax, user roles, receipts |
| Data layer | Turns sales into a live picture of the business | Real-time inventory, daily sales, Z-reading, reports |
| Integrations | Connects the till to the rest of the business | Inventory, accounting, e-invoicing, loyalty, ecommerce |
What does a POS system actually do?
At its simplest a POS system rings up a sale: it looks up an item, applies the price and any discount, computes the tax, takes the payment, and prints or sends a receipt. The difference between a POS system and a plain cash register is everything that happens around that sale.
A real POS system deducts the item from inventory the instant it is sold, so stock on hand is always current. It records who made the sale, at which branch, and when. It rolls every transaction into a daily total — the close, or Z-reading — that has to reconcile to the cash and card settlements. And it feeds all of that into reports a manager can act on: best-sellers, slow movers, hourly traffic, branch-versus-branch.
POS hardware vs POS software
People often picture the hardware — the terminal, the cash drawer, the receipt printer — when they hear POS. But the hardware is the cheap, commodity part. The value is in the software: the catalogue, the pricing and discount rules, the tax handling, the user permissions, and the reports.
Modern POS software runs on ordinary tablets or PCs, so the same system can drive a fixed counter, a roaming line-buster on a phone, and a self-checkout — all sharing one catalogue and one set of numbers. That is why the software is what you are really choosing when you choose a POS.
Cloud POS vs on-premise POS
A cloud (or hosted) POS keeps the catalogue and sales data on a server you reach over the internet, so head office sees every branch in real time and updates a price once for everyone. An on-premise POS keeps the data on a machine in the store, which keeps working if the internet drops but makes multi-branch reporting and updates harder.
Most multi-branch retailers in the Philippines now run cloud POS for the central visibility, with an offline mode so a single store can keep selling through an outage and sync when the connection returns. The practical question is not cloud-versus-on-premise in the abstract — it is whether the system keeps selling offline and reconciles cleanly afterwards.
| Item | Cloud POS | On-premise POS |
|---|---|---|
| Multi-branch view | Real time, central | Manual consolidation |
| Price/menu updates | Once, for all branches | Per machine |
| Works without internet | Offline mode + later sync | Yes, but isolated |
| Upfront cost | Lower; usually subscription | Higher; licence + server |
| Maintenance | Vendor-managed | Your IT or the vendor on-site |
POS systems in the Philippines: BIR rules you cannot skip
In the Philippines a POS system is not just a retail tool — it is a tax instrument. A POS that issues official receipts or sales invoices must be registered with the Bureau of Internal Revenue, and from 2024–2025 the rules tightened considerably.
Under Revenue Regulations 11-2025 and the e-invoicing push, covered taxpayers must issue electronic invoices and transmit sales data to the BIR. A POS that prints receipts but cannot register with the BIR, produce a compliant Z-reading, or transmit to the Electronic Invoicing System (EIS) is a liability, not an asset. This is the single most common way a cheap or foreign POS fails a Philippine business — the retail features look fine, but the compliance layer is missing.
What a BIR-ready POS must handle
- Registration with the BIR and a machine-readable permit
- Sequential, non-resettable receipt and invoice numbering
- A daily Z-reading that reconciles to sales and is retained
- Senior-citizen and PWD discounts applied and reported correctly
- Electronic invoicing / EIS transmission where the taxpayer is covered
Buying a POS vs building one
For a single store, an off-the-shelf POS subscription is usually the right answer — it is cheap, fast, and good enough. The calculus changes for multi-branch operators and enterprises, where per-terminal and per-branch fees compound every month, the BIR rules are non-negotiable, and the business has workflows a generic product cannot model.
At that scale the question becomes whether to keep paying a growing subscription for a system you do not own, or to build a POS shaped around your operation — BIR-compliant from the first receipt, with no per-terminal fee — that your company owns outright. That is the build-versus-buy decision Orkids exists to handle for Philippine enterprises.
What is a POS system? — frequently asked questions
- What is the difference between a POS system and a cash register?
- A cash register stores cash and prints a receipt. A POS system records the sale in software — deducting stock, identifying the cashier and branch, rolling into a daily close, and feeding reports — so the business gets a live picture, not just a paper trail.
- What does POS stand for?
- POS stands for point of sale — the point at which a transaction is completed. A POS system is the hardware and software used at that point to take payment and record the sale.
- Does a POS system need internet to work?
- A cloud POS needs internet for central, real-time reporting, but a well-built one keeps selling offline at the till and syncs when the connection returns. An on-premise POS works without internet but cannot give head office a live multi-branch view.
- Does a POS system have to be registered with the BIR in the Philippines?
- Yes. A POS that issues official receipts or sales invoices must be registered with the Bureau of Internal Revenue, with sequential non-resettable numbering, a retained daily Z-reading, and — where the taxpayer is covered — electronic invoicing to the BIR's EIS.
- What hardware does a POS system need?
- Typically a terminal or tablet, a cash drawer, a receipt printer, and a barcode scanner, plus a card or QR reader for cashless payment. Modern POS software runs on ordinary tablets and PCs, so the hardware is largely commodity.
- What is a Z-reading?
- A Z-reading is the end-of-day close: the cumulative sales total a POS prints when the day's transactions are finalised. It must reconcile to the cash and card settlements and, in the Philippines, is part of BIR compliance and is retained for audit.
- How much does a POS system cost in the Philippines?
- Off-the-shelf POS subscriptions commonly run a few hundred to a few thousand pesos per terminal per month. For multi-branch operators those per-terminal and per-branch fees compound, which is why larger businesses weigh a one-time custom build they own against an open-ended subscription.
- Can a POS system connect to accounting and inventory?
- Yes — that integration is the point of a POS system rather than a cash register. Each sale can post to accounting and deduct from inventory in real time, so stock on hand and the books stay current without manual re-keying.
- What is the difference between cloud POS and on-premise POS?
- Cloud POS keeps the catalogue and sales data centrally, so head office sees every branch in real time and updates prices once for all. On-premise POS keeps data on an in-store machine — it works without internet but makes multi-branch reporting and updates manual.
Key terms
- Point of sale (POS)
- The point at which a sale is completed; by extension, the hardware and software used there to take payment and record the transaction.
- SKU
- Stock-keeping unit — the unique code that identifies a sellable item, so the POS can price it and deduct it from inventory.
- Z-reading
- The end-of-day cumulative sales close a POS prints; in the Philippines it must reconcile to settlements and is retained for BIR audit.
- BIR accreditation
- Registration of a POS or sales system with the Bureau of Internal Revenue so it may legally issue official receipts and sales invoices.
- EIS
- The BIR's Electronic Invoicing System, to which covered taxpayers must transmit sales data under the 2024–2025 e-invoicing rules.
- Cloud POS
- A POS whose catalogue and sales data live on a central server reachable over the internet, giving head office a real-time multi-branch view.
Sources
- Bureau of Internal Revenue — Revenue Regulations No. 11-2025 (electronic invoicing / sales-data transmission).
- Bureau of Internal Revenue — Revenue Memorandum Order No. 9-2021 (registration of POS / CAS and the documentary requirements).
- Republic Act 9994 (Expanded Senior Citizens Act) and RA 10754 (PWD) — discount-and-reporting rules a POS must apply.