Everything small UK businesses need to know about electronic point of sale systems
← Back to Till SystemEPOS stands for Electronic Point of Sale. It is a digital system that replaces the traditional mechanical cash register with a computer-based solution for processing sales transactions. At its core, an EPOS system records every sale, calculates totals, applies discounts and VAT, and stores a complete record of all transactions.
A typical EPOS setup consists of several components working together: a touchscreen display or tablet for the operator, software to manage products and process sales, a receipt printer, a cash drawer, and often a barcode scanner and card payment terminal. However, modern web-based EPOS systems like Mini Till can run entirely in a browser on any device, making them accessible to even the smallest businesses without significant upfront investment.
When a customer makes a purchase, the EPOS system looks up the product price, adds it to the transaction, calculates any applicable discounts or taxes, processes the payment, and records the complete sale. This data then feeds into reports that help you understand your business performance, manage stock levels, and meet your legal obligations to HMRC.
Tip: You do not need expensive hardware to start using EPOS. A tablet or even a smartphone running a web-based till system is sufficient for many small businesses, market stalls, and pop-up shops.
Traditional mechanical cash registers served businesses well for over a century, but digital EPOS systems offer significant advantages that can transform how you run your operation. Here are the key benefits.
Digital tills eliminate manual price entry errors. Products are pre-loaded with their correct prices, so the operator simply selects the item or scans a barcode. This speeds up transactions and reduces costly mistakes. A traditional register relies on the operator to key in the correct price every time, which is prone to human error, especially during busy periods.
Every transaction is automatically recorded with a timestamp, itemised list, payment method, and total. This creates a complete audit trail that is invaluable for tax returns, VAT submissions, and resolving any disputes. With a traditional till, you are reliant on paper rolls that can fade, tear, or be lost.
EPOS systems generate real-time reports showing your daily takings, best-selling products, busiest trading times, and payment method breakdowns. This data helps you make informed decisions about stock ordering, staffing, pricing, and promotions. A traditional register simply totals the day's takings with no further analysis.
Web-based EPOS systems can run on hardware you already own. A tablet, laptop, or even a smartphone can serve as your till. There is no need to purchase a dedicated register, and many EPOS solutions (including Mini Till) are completely free to use.
Modern EPOS systems come with a range of features designed to streamline your business operations. Here is what the most common features do and how they benefit you.
Stock management tracks how many of each product you have available. When a sale is made, the stock count decreases automatically. This helps you know when to reorder, prevents you from selling items you have run out of, and reduces waste from over-ordering. For businesses selling perishable goods, this feature is particularly valuable.
Reports summarise your trading data over any period you choose: daily, weekly, monthly, or custom date ranges. Typical reports include total revenue, number of transactions, average transaction value, payment method breakdown, and product-level sales data. These reports are essential for understanding your business performance and for completing tax returns accurately.
Barcode scanning allows you to process sales quickly by scanning product barcodes rather than searching through a product list. This is especially useful for retail businesses with large product catalogues. USB barcode scanners are inexpensive (from around £20) and work with most EPOS systems. Some systems also support scanning via a smartphone camera.
EPOS systems let you apply percentage or fixed-amount discounts to individual items or entire transactions. You can set up promotions such as buy-one-get-one-free, happy hour pricing, or loyalty discounts. The system calculates the adjusted total automatically, ensuring accuracy and consistent application of your pricing rules.
Organising products into categories (such as food, drink, retail, and other) makes it quicker to find items on the till screen and enables category-level reporting. You can see at a glance how much revenue each category generates, helping you focus on your most profitable lines.
Every UK business, regardless of size, has a legal obligation to keep adequate records of its income and expenses. HMRC requires that you maintain records that are accurate, complete, and up to date. For businesses that take cash or card payments through a till, this means keeping detailed transaction records.
HMRC expects you to keep records of:
Self-assessment records must be kept for at least five years after the 31st January submission deadline of the relevant tax year. Limited company records must be kept for at least six years from the end of the last company financial year they relate to. VAT records must be kept for six years.
Important: HMRC can impose penalties for inadequate record keeping. Using an EPOS system that automatically records all transactions makes compliance significantly easier and reduces the risk of errors or omissions.
Making Tax Digital (MTD) is HMRC's initiative to modernise the UK tax system. It requires businesses to keep digital records and submit tax information using compatible software. MTD is being rolled out in phases and affects how you use your till system.
Since April 2022, all VAT-registered businesses must keep digital VAT records and submit VAT returns through MTD-compatible software. Your EPOS system can help by providing accurate, digital records of all VAT-applicable sales. You can export this data and feed it into your accounting software or hand it to your accountant for submission.
MTD for Income Tax Self Assessment (MTD for ITSA) requires self-employed individuals and landlords with income above certain thresholds to keep digital records and submit quarterly updates to HMRC. The rollout began in April 2026 for those with qualifying income over £50,000. If you are self-employed and use a till system, ensuring your sales data is stored digitally will help you meet these new obligations.
An EPOS system that exports sales data in CSV or spreadsheet format makes MTD compliance straightforward. You can import your till data into accounting packages such as Xero, QuickBooks, or FreeAgent, which are all MTD-compatible. This eliminates the need to manually transcribe figures from paper till rolls, reducing errors and saving time.
Note: Mini Till allows you to export all sales history as CSV files, making it easy to import your transaction data into MTD-compatible accounting software.
Getting started with a digital till does not need to be complicated or expensive. Follow these steps to set up your first EPOS system and start processing sales.
For a simple setup, a tablet (iPad or Android) or laptop is all you need. Mount it on a stand at your counter or till point. If you need to print receipts, add a thermal receipt printer (available from around £50). For card payments, you will need a separate card reader from a provider such as SumUp, Square, or Zettle.
Enter all your products with names, prices, and categories. Take the time to organise them logically - this will save you seconds on every transaction, which adds up to hours over a busy week. If you have a large product list, look for an EPOS that supports CSV import.
If you are VAT registered, set your till to calculate VAT at the appropriate rate (standard 20%, reduced 5%, or zero). Decide whether your product prices are VAT-inclusive or VAT-exclusive. Most retail businesses display prices including VAT.
Run through several test transactions before your first real trading day. Check that prices are correct, discounts apply properly, VAT calculates accurately, and receipts print as expected. Delete the test data before you start for real.
Ensure anyone who will use the till knows how to add items, apply discounts, process different payment methods, and handle common issues such as voiding an item or cancelling a transaction. A few minutes of training prevents costly mistakes.
Even as card payments become increasingly popular, cash remains an important payment method for many UK businesses. Proper cash handling procedures protect your business from theft, errors, and disputes.
Start each day or shift with a counted float - a set amount of cash in the drawer to provide change. A typical float for a small business is between £50 and £150, depending on your average transaction values. Count it, record the amount, and have a second person verify if possible.
At the end of the day, count all cash in the drawer, subtract the opening float, and compare the result against your till's recorded cash sales. Any discrepancy should be investigated and documented. Small variances of a few pence are common, but regular or significant shortfalls may indicate a problem.
Tip: Keep a cash-up sheet that records the opening float, total cash sales, total cash in the drawer at close, and any variance. This creates a paper trail and helps identify patterns in discrepancies.
Card payments now account for over 60% of all retail transactions in the UK. Offering card payment is no longer optional for most businesses - customers expect it. Here is what you need to know about integrating card payments with your till system.
For small businesses, the most popular card reader providers in the UK include:
All modern card readers support contactless payments via both physical cards and mobile wallets (Apple Pay, Google Pay, Samsung Pay). The contactless limit in the UK is £100. For amounts over this, customers must insert their card and enter their PIN. Contactless payments are faster and preferred by most customers for smaller transactions.
Card payments are not instant. The money typically arrives in your business bank account within one to three working days, depending on your provider. SumUp and Square usually settle within one to two working days. Factor this delay into your cash flow planning.
Organising your product catalogue effectively is one of the most impactful things you can do to speed up transactions and improve your reporting. A well-structured product list saves time at the till and gives you clearer business insights.
Use clear, concise product names that your staff can identify at a glance. Avoid abbreviations that might confuse new team members. If you sell multiple sizes or variants, include the size in the name (e.g., "Latte - Regular", "Latte - Large") rather than creating a separate category for sizes.
Keep your category structure simple. For most small businesses, four to eight categories is sufficient. Common structures include:
Your EPOS system makes it easy to update prices across your entire product range. Review your pricing regularly, at least quarterly, to account for cost increases from suppliers. Consider using psychological pricing (£2.99 rather than £3.00) for retail products, but round numbers (£3.00) for food and drink service where speed matters more.
Reconciliation is the process of verifying that the money in your till matches the sales recorded by your EPOS system. Performing this at the end of every trading day is essential for maintaining accurate financial records and spotting problems early.
Important: Never skip reconciliation, even on quiet days. Consistent daily cashing up is the foundation of accurate financial records and helps you identify issues before they become serious problems.
If your business's taxable turnover exceeds the VAT registration threshold (currently £90,000 per year), you must register for VAT with HMRC. Even below this threshold, you can register voluntarily. Your EPOS system plays a crucial role in managing VAT correctly.
The UK has three VAT rates that you may need to apply:
Configure your EPOS to apply the correct VAT rate to each product. For businesses selling a mix of standard-rated and zero-rated items (such as a cafe selling both eat-in and takeaway food), this is particularly important. Eat-in food is standard-rated at 20%, while most cold takeaway food is zero-rated. Getting this right is a legal requirement and mistakes can result in penalties from HMRC.
Your EPOS should provide reports showing total sales by VAT rate, making it straightforward to calculate the VAT you owe. Under Making Tax Digital, you must submit VAT returns quarterly using compatible software. Your EPOS sales data feeds directly into this process.
Not all EPOS systems are created equal. The right choice depends on your business type, size, budget, and specific requirements. Here is a guide to help you choose.
You need a portable, simple system that works without a permanent internet connection. A web-based EPOS on a tablet is ideal. Key requirements: ease of use, quick setup, offline capability, and low or no cost. Mini Till is well suited to this use case.
Speed at the till is critical. You need a system with large, easy-to-tap product buttons, quick modifier options (milk type, size), and seamless integration with a card reader. VAT handling for eat-in versus takeaway is also important. Consider systems that support kitchen display screens for food orders.
Retail shops typically have larger product catalogues and benefit from barcode scanning, stock management, and customer loyalty features. If you sell online as well as in-store, look for an EPOS that integrates with your e-commerce platform to keep stock levels synchronised.
Durability and simplicity are key. You need a system that works in all weather, is easy to clean, and can handle a limited but fast-moving menu. A tablet in a rugged case with a simple product grid is ideal. Ensure your card reader has reliable mobile data connectivity.
EPOS costs vary enormously. At one end, free web-based solutions like Mini Till cost nothing. Mid-range cloud-based systems typically charge £30-£70 per month. Full enterprise systems with dedicated hardware can cost thousands upfront plus ongoing fees. For most small businesses, a free or low-cost solution provides everything you need.
Tip: Start with a free system to learn what features matter most to your business. You can always upgrade later once you know exactly what you need. Paying for features you will never use is a common and unnecessary expense.