Operating Cash Registers & POS Systems

The cash register or POS (Point of Sale) system is the central tool of retail operations. Every transaction in the store - sales, returns, exchanges, price lookups, discounts, and gift cards - flows through the POS. Operating it accurately and efficiently is one of the most important skills for any cashier, sales associate, or customer-facing retail employee. This guide covers the full range of POS operations you will encounter on the job, from basic transactions to complex scenarios, along with the best practices that keep your drawer balanced and your customers satisfied.

Understanding POS Systems

What Is a POS System?

A modern POS system is more than a cash register. It is a networked computer system that:

• Processes transactions - Rings up sales, calculates totals, applies taxes, and processes payments
• Tracks inventory - Every item scanned reduces the on-hand inventory count in the system
• Records customer data - Loyalty program information, purchase history, and contact details
• Generates reports - Sales by hour, by associate, by department, by payment type
• Manages pricing - Regular prices, sale prices, markdowns, and promotional discounts
• Integrates with other systems - Inventory management, accounting, e-commerce, and loss prevention

Common POS Platforms

You may encounter any of these systems:

• Square - Popular with small businesses. Tablet-based, simple interface.
• Clover - Common in small to mid-size retail and restaurants.
• Shopify POS - Used by businesses that also sell online.
• Lightspeed - Popular with specialty retail and restaurants.
• Oracle MICROS - Common in large retail and hospitality chains.
• NCR (National Cash Register) - Used by major grocery and retail chains.
• Toshiba/IBM - Found in large department stores and supermarkets.

While the screens look different, the core functions are the same. Learning one system well gives you the foundation to learn any other.

Hardware Components

• Terminal/screen - The main display where you process transactions
• Barcode scanner - Reads product barcodes to identify items. Handheld or flatbed.
• Cash drawer - Holds bills and coins. Opens automatically during cash transactions.
• Receipt printer - Prints customer receipts. Thermal printers are most common.
• Card reader/payment terminal - Processes credit cards, debit cards, and mobile payments (Apple Pay, Google Pay)
• Scale (grocery) - Weighs produce and bulk items
• Customer display - A small screen facing the customer that shows the transaction total

Opening Your Register

Counting Your Starting Bank

Every shift starts with counting your opening bank (also called a starting till or starting drawer):

1. Receive your drawer from the manager or safe
2. Count every denomination of coins and bills:
   • Pennies, nickels, dimes, quarters
   • $1, $5, $10, $20 bills
3. Record the total on the register opening form
4. Compare to the expected amount - Most starting banks are $100-$200. If the count does not match, report the discrepancy before your shift starts.
5. Install the drawer in the register and log in with your associate ID

Organizing Your Drawer

A well-organized drawer prevents errors:

• Coins - Each denomination in its own slot, with the cup facing the correct direction for easy access
• Bills - Arranged left to right in ascending order: $1, $5, $10, $20. All bills facing the same direction with the face side up.
• Large bills ($50, $100) - Under the cash tray, not in the main slots. This keeps them separate, reduces the risk of accidentally giving one as change, and makes the drawer less of a target.
• Coupons, checks, and vouchers - Under the tray or in a designated slot

Processing a Basic Sale

Step by Step

1. Greet the customer - "Hi, did you find everything you were looking for?"
2. Scan each item - Hold the barcode under the scanner or use the handheld scanner. Listen for the confirmation beep and verify the item appears on the screen.
3. Handle non-scanning items - If a barcode will not scan, enter the SKU number manually. If there is no SKU, do a PLU (Price Look-Up) search by department or item name. Never guess a price.
4. Verify prices - Watch the screen as you scan. If a price seems wrong, the customer will likely catch it at the end. Better to verify now.
5. Apply discounts or coupons - Scan coupons or enter discount codes as prompted. Verify the discount applies to the items purchased.
6. Bag items - As you scan or after scanning all items, bag appropriately. Heavy items on the bottom, fragile items on top, chemicals separate from food.
7. Announce the total - "Your total is $47.53."
8. Accept payment - Process the payment method the customer chooses (see payment types below)
9. Provide the receipt - Hand or offer the receipt. "Here is your receipt. Thank you!"
10. Close the interaction - "Have a great day!" or "Thanks for shopping with us!"

Scanning Tips

• Position the barcode toward the scanner. If the scanner cannot read it, try adjusting the angle or distance.
• Wrinkled or damaged barcodes - Gently flatten the barcode. If it still will not scan, enter the number manually.
• Multi-pack items - Some items have both an individual barcode and a multi-pack barcode. Scan the correct one.
• Weighted items - Place on the scale and enter the PLU code. The system calculates the price based on weight.
• Scan and bag rhythm - Develop a smooth rhythm of scan, bag, scan, bag. This keeps the line moving.

Payment Types

Cash

1. The customer hands you cash
2. Place the bill(s) across the top of the open drawer - Do not put them in the slot yet. This prevents disputes about which bill the customer gave you.
3. Enter the amount tendered into the POS. The system calculates the change due.
4. Count the change - Start with coins, then bills. Count up from the sale amount to the tendered amount.
5. Count change back to the customer - Place coins in their hand first, then bills, counting aloud: "Your total was $7.38 out of $20. That is 62 cents makes $8, and $2 makes $10, and $10 makes $20."
6. After the customer accepts the change, place the tendered bill(s) into the correct slot in the drawer
7. Close the drawer immediately. Never leave the drawer open.

Credit and Debit Cards

1. The customer inserts, taps, or swipes their card at the payment terminal
2. Chip cards (EMV) - The customer inserts the card chip-first and leaves it in until prompted to remove it
3. Contactless/tap - The customer taps their card or phone on the reader. Look for the contactless symbol.
4. Swipe - Only if the chip is not working. Swipe the magnetic stripe through the reader.
5. Debit PIN - For debit transactions, the customer may enter a PIN on the keypad
6. Signature - Some transactions require a signature on the screen or receipt (less common with chip technology)
7. Approval - Wait for the terminal to display "Approved." If declined, politely ask the customer for another payment method: "It looks like that one is not going through. Would you like to try another card?"

Mobile Payments

Apple Pay, Google Pay, Samsung Pay, and other mobile wallets work like contactless cards:

1. The customer holds their phone or watch near the payment terminal
2. The terminal reads the NFC signal
3. Process is the same as a contactless card tap
4. Wait for approval confirmation

Gift Cards and Store Credit

1. Scan or swipe the gift card at the payment terminal
2. The system checks the balance and deducts the purchase amount
3. If the gift card balance is insufficient, the POS prompts for a second payment method for the remaining balance
4. Print the remaining balance on the receipt so the customer knows what is left

Split Payments

Customers sometimes want to pay with multiple methods (e.g., part gift card, part cash):

1. Apply the first payment method for the specified amount
2. The POS shows the remaining balance
3. Apply the second payment method for the remainder
4. Each method is recorded separately on the receipt

Checks (Where Accepted)

1. The customer writes the check for the exact amount
2. Enter the check amount in the POS
3. Verify the check has the correct date, payee, and amount
4. Run the check through the verification system if your store uses one
5. Place the check under the cash tray

Common Transaction Types Beyond Basic Sales

Returns

1. Ask for the receipt - The receipt contains the transaction number, which makes the return faster and more accurate
2. Verify the return policy - Is the item within the return window? Is it in returnable condition?
3. Scan the item being returned or enter the transaction number from the receipt
4. Select the return reason in the POS (changed mind, defective, wrong item, etc.)
5. Process the refund to the original payment method:
   • Credit/debit card returns go back to the card
   • Cash returns are paid from the drawer
   • Gift card returns typically go to a new gift card or store credit
6. Get manager approval if required by policy (many stores require it for returns over a certain dollar amount)

Exchanges

An exchange is essentially a return and a new sale in one transaction:

1. Process the return for the original item
2. Ring up the new item
3. The system calculates the difference
4. If the new item costs more, the customer pays the difference
5. If the new item costs less, refund the difference

Price Adjustments

If a customer purchased an item that went on sale shortly after:

1. Look up the original transaction
2. Apply the price adjustment per store policy
3. Refund the difference to the original payment method
4. Document the adjustment with the reason

Voids and Cancellations

• Line void - Remove a single item from the transaction. If you scanned the wrong item, void that line and scan the correct one.
• Transaction void - Cancel the entire transaction before payment. Use when the customer decides not to purchase or when you need to start over.
• Post-void - Cancel a completed transaction after payment. Usually requires manager authorization. Used when a serious error is discovered after the sale.

Important: Every void is tracked by the POS and reviewed by loss prevention. Excessive voids are a red flag. Only void when there is a legitimate reason, and document the reason.

Suspended Transactions

If a customer needs to leave and come back, or forgot their wallet:

1. Suspend (park) the transaction in the POS
2. The transaction is saved and can be recalled later
3. When the customer returns, recall the transaction and complete the sale

End-of-Shift: Closing Your Register

Counting Your Drawer

1. Log out of any pending transactions
2. Run the register close report - This shows expected totals for each payment type
3. Remove the drawer from the register
4. Count all cash by denomination. Start with coins, then count bills.
5. Record your total
6. Subtract the starting bank - The remainder is your cash sales
7. Compare to the POS report - Your counted cash should match the system's expected cash total

Overages and Shortages

• Overage - More cash in the drawer than the system expects. Possible causes: short-changed a customer, received an extra bill, or a coupon was not scanned.
• Shortage - Less cash in the drawer than the system expects. Possible causes: gave too much change, miscounted, or a transaction was not processed correctly.
• Acceptable variance - Most stores allow a variance of $1-$3. Anything larger triggers an investigation.
• Document everything - Record the variance and any explanation on the closing form.
• Consistent shortages are a serious issue. They may result in retraining, reduced cash-handling responsibilities, or disciplinary action.

Preparing the Deposit

1. Count the deposit amount (total cash minus the starting bank for the next shift)
2. Fill out the deposit slip with the date, register number, your name, and the amount
3. Seal the cash in a deposit bag
4. Have a second person verify the count if required by your store
5. Deposit the bag in the drop safe immediately

Security and Loss Prevention at the Register

• Watch for sweethearting - Deliberately not scanning items for friends or family. This is theft.
• Verify voids and returns - Every void and return should have a legitimate reason
• Cash drop regularly - Do not allow excessive cash to accumulate in the drawer
• Be alert to distraction theft - Customers who create a commotion at the register while an accomplice steals nearby
• Counterfeit bills - Check security features on bills $20 and above (security strip, watermark, color-shifting ink)
• Never leave your drawer open or unattended
• Log out when stepping away - Even for a moment

Troubleshooting Common POS Issues

Problem	What to Do
Scanner not reading barcodes	Clean the scanner glass. Try manual entry of the barcode number.
Receipt printer not printing	Check paper roll. Clear any paper jams. Verify the printer is connected.
Card reader not working	Have the customer try inserting, tapping, or swiping. Reboot the terminal if needed. Process the card manually (imprint or phone authorization) if allowed.
POS freezes or crashes	Do not repeatedly click. Wait 15 seconds. If frozen, reboot the terminal. Notify your manager.
Price does not match shelf tag	Honor the shelf price for the customer (most stores' policy). Report the discrepancy to the department so the tag can be corrected.
Drawer will not open	Use the manual release key (usually underneath the register). Notify maintenance.

Tips from Experienced Cashiers

• "Always count change back to the customer out loud. It prevents arguments and builds trust."
• "Keep your drawer organized at all times. When you get busy, that is when a messy drawer causes a $20 error."
• "Never leave bills on top of the drawer after a transaction. Put them away and close the drawer before starting the next customer."
• "Learn the PLU codes for your most common items. In a grocery store, memorizing the top 20 produce codes saves you from looking them up hundreds of times a day."
• "When the line is long, stay calm. Rushing is when mistakes happen. A steady pace is actually faster than a panicked pace."
• "If a customer says you gave them the wrong change, stay calm. Count the drawer right there if needed. The register tape tells the truth."
• "Treat the cash in your drawer like it is your own money. That mindset keeps you careful."