Key takeaways
- A cash register totals sales, holds cash and prints a tape. A POS system also records every item, tracks stock, links to payment terminals and gives you reports you can use.
- Both can meet IRAS record-keeping rules: IRAS accepts serially numbered receipts or cash register tapes as sales records, kept for at least five years.
- The usual triggers to upgrade are a rising share of cashless payments, GST registration, stock you can’t track, more than one staff member on the till, or a second outlet.
- A POS system with a cash drawer keeps cash handling familiar while adding the records and controls a register can’t.
Last checked against IRAS, NETS, EnterpriseSG and Star Micronics pages: September 2026.
What a cash register does, and doesn’t do
A traditional point of sale cash register is a self-contained machine. Staff key in prices or department keys, the register adds up the sale, the drawer opens, and a paper tape records the day’s takings. At closing, you print a total and count the drawer.
For a small stall with a short menu, mostly cash customers and one person on the counter, that’s often enough. It’s simple, fast and needs no internet.
What a basic register doesn’t do is tell you much. It knows totals, maybe by department, but not which items sold at which hour. It doesn’t know your stock. It doesn’t talk to the NETS terminal or the PayNow QR code, so card and QR sales have to be reconciled by hand. And the data stays in the machine.
What a POS system adds
A POS system does the register’s job and records everything around it. If you want the basics first, our guide on what a POS system is explains the parts. In short, a POS adds:
- Item-level records: every item, modifier, discount, void and staff member, time-stamped.
- Reports: sales by item, hour, payment method and staff, available from a phone or browser.
- Stock: deductions as items sell, so you see what’s running low.
- Linked payments: the amount goes to the payment terminal, so staff don’t key it twice.
- Customers: loyalty points, vouchers and marketing, if you want them.
Cash register vs POS system: side by side
| Basic cash register | POS system | |
|---|---|---|
| Reporting | Daily totals, sometimes by department | Sales by item, hour, staff, outlet and payment type |
| GST records | Register tapes and receipts | Itemised receipts and exportable sales records |
| Inventory | Not tracked | Stock deducted as items sell |
| Cashless payments | Separate terminal or QR; manual reconciliation | Often linked to terminals, with payment-method totals |
| Cash control | Drawer count vs tape | Per-staff logins, void and discount logs, drawer reports |
| Access | At the machine only | Back office on a phone or browser |
| Up-front cost | Usually lower | Usually higher; may be grant-supported |
Records and GST: what IRAS expects
You don’t need a POS system to comply with IRAS. On its GST record-keeping page, IRAS lists “serially numbered receipts issued or cash register tapes” as acceptable sales records, and says records must be kept for at least five years. It also says you can keep records electronically without approval, if you meet its guides. Its company record-keeping page warns that keeping only bank statements is poor record keeping, with penalties of up to $5,000.
What changes the picture is GST. IRAS says you must register for GST when taxable turnover exceeds $1 million in a calendar year, or is expected to in the next 12 months. Once registered, the obligations grow:
- Prices shown to the public must include GST. IRAS’s price display page says failure to comply can mean a fine of up to $5,000.
- Receipts must be serially printed with the date, your business name and GST number, the total including GST and the words “Price payable includes GST”, according to IRAS’s invoicing page.
- GST-registered customers need a tax invoice, or a simplified tax invoice for amounts up to $1,000.
- You file GST returns for each accounting period, and need clean sales and payment totals to do it.
A register can print compliant receipts if it’s set up correctly. But pulling quarterly totals by payment type, reconciling card and QR settlements, and handing clean data to your accountant is far easier from a POS.
Cashless payments change the maths
For many small shops, the real reason to upgrade is how customers pay. A register was designed around cash. Once a large share of your sales is NETS, cards and QR, the register only records half the story, and someone has to match terminal settlements against the tape.
You can accept QR payments without any terminal. NETS says its SGQR label lets merchants accept NETS QR with no hardware, with same-day settlement and reconciliation through the NETS Merchant Portal or NETSBiz app. For card and NETS card payments, NETS’s NETS POS page says NETS payments reach your bank the next working day, and that terminal and transaction fees apply. Our comparison of a hawker POS vs SGQR goes deeper for stalls.
A POS system brings those payment types into one record. ChaChaCha accepts PayNow, PayLah!, NETS, Visa and Mastercard, and GrabPay through DBS, UOB and 2C2P, with split payments and automated reconciliation. AppsPOS is a NETS Certified Vendor, listed on the NETS POS page.
The POS cash drawer: keeping cash handling familiar
Upgrading doesn’t mean going cashless. A POS system with a cash drawer works much like a register at the counter: ring up the sale, the drawer opens, give change.
Most POS cash drawers open on a signal from the receipt printer. Star Micronics, for example, describes its CD4 cash drawer as using standard printer-driven communication, rated for at least one million opens, with a key lock for manual release. Star also sells a controller that lets tablets and mobile POS devices open the drawer directly, and its mPOP combines a small printer and cash drawer in one unit for tight counters.
The difference from a register is the audit trail. With per-staff logins, every drawer opening, void and discount is logged against a name. Our guide to cash control and theft prevention covers the end-of-shift routine. Check with your vendor, including us, which drawer models work with your printer and terminal.
Upgrade triggers for hawkers
- Queues build because one person takes orders, cooks and collects payment.
- More than half your customers pay by QR or card, and you reconcile by scrolling through app notifications.
- You’ve added a second person on the counter and the takings no longer match the count.
- You want to take pre-orders for collection.
At this point, a simple tablet or all-in-one POS, with QR ordering and a queue display if you need one, usually pays back in time saved. If you are choosing between a payment app and a full system, see which type of POS your outlet needs. See our hawker POS page.
Upgrade triggers for minimarts and small shops
- You don’t know what’s in stock until the shelf is empty.
- Prices change often and keying them into the register takes too long.
- You’re close to the $1 million GST threshold, or already registered.
- Several staff share the till and you can’t tell who voided what.
Our retail POS page covers barcode-based selling and stock.
Upgrade triggers for small cafés
- Orders have modifiers (less sugar, oat milk, extra shot) that the register can’t record and the barista can’t read.
- You want kitchen or bar tickets printed automatically.
- You’d like to see which items sell at which hour to plan staff and prep.
- You want loyalty or stamps without a paper card.
ChaChaCha handles custom modifiers, English and 中文 kitchen tickets, and loyalty points and stamps. See our café POS page.
Cost, grants and making the switch
A cash register is usually cheaper up front. A POS system usually costs more, often as a monthly subscription plus hardware. Before you compare, read our guides to free POS systems, which explain where the costs hide, and the best POS systems for small businesses.
Grants can help. EnterpriseSG says its EDGE Grant offers up to 70% support for SMEs, with support levels varying by activity. EDG, MRA and PSG cease on 29 September 2026, and applications for business grant support move to the EDGE Grant from 30 September. AppsPOS has been a PSG pre-approved vendor and is approved under the EDGE Grant. See our POS grant guide for how it works.
ChaChaCha pricing is quote-based, with hardware supplied by AppsPOS as part of the package. To switch smoothly, run the register and POS side by side for a day, load your menu or product list first, and train staff on voids and refunds before go-live. Talk to us about what your shop needs.
