Square Card Reader for Business: Everything You Need to Know

For small businesses looking to accept card payments quickly and efficiently, Square has become one of the most recognised payment service providers in the UK. With products ranging from the basic Square Reader to the advanced Square Register and Square Terminal, the platform offers flexible solutions for retail businesses, mobile traders and service providers.


This guide explains everything you need to know about using a Square card reader for business, including key features, pricing, transaction fees and whether Square’s POS software is the right fit for your company.

What is the Square card reader?

The Square card reader is a mobile card reader designed to help businesses process payments securely using debit cards, chip cards and contactless payments. Businesses can connect the device to a mobile device using the Square POS app and begin accepting payments in person within minutes.

Square offers multiple hardware options, including the basic Square Reader, Square Stand, Square Terminal, Square Handheld and Square Register. These products integrate with Square’s software to provide a complete point of sale app and payment ecosystem.


You can explore the official hardware and payment options through Square UK.

How Square Reader works

The Square Reader works by connecting to the Square Reader app or Square POS app on compatible Android devices or Apple devices. Once connected, businesses can process card payments, accept contactless payments and issue digital receipts.


Customers can pay using chip and pin, Apple Pay or mobile payments directly through the reader. Funds are then transferred into the linked bank account associated with the Square account.


The setup process is relatively simple and requires an internet connection, access to the Square app and verification of your business information.

Types of Square payment devices

Square offers several devices depending on business requirements.


The basic Square Reader is designed for businesses that need a low-cost mobile card reader. It is compact, portable and ideal for sole traders, tradespeople and businesses operating at multiple locations.


Square Terminal is an all-in-one solution with a built-in receipt printer and touchscreen display. It allows businesses to process payments without needing an additional mobile device.


Square Register provides a more advanced POS system designed for retail businesses and hospitality environments. It integrates directly with Square’s POS software and supports additional hardware such as cash drawers and barcode scanners.


Square Stand transforms an iPad into a complete point of sale setup and is commonly used in cafés, salons and retail environments.


Square Kiosk is designed for self-service ordering and customer interaction in food and beverage settings.

Key features of Square POS

Square’s software is one of its strongest selling points. The free POS app includes features such as inventory tracking, sales reporting, invoice payments and customer management tools.

Square Point of Sale also supports third-party apps, online store integration and virtual terminal functionality for businesses accepting payments remotely.


For small businesses, the ability to track transactions, monitor sales performance and manage customer payments from a single dashboard is particularly useful.


Advanced users can access additional accounting and reporting features through integrations with platforms such as Xero and other accounting software providers.

Transaction fees and pricing

One of the reasons Square is popular with small businesses is its transparent pricing structure. Unlike some traditional payment providers, Square generally avoids monthly fees and setup fees on standard plans.


Instead, businesses pay a transaction fee each time they process payments. Fees vary depending on whether the payment is in person, online or manually entered using the virtual terminal.


Non-UK card transactions and international cards may incur higher fees. Businesses processing large payment volumes may also qualify for custom pricing or lower transaction fees.

Are there hidden fees?

Many business owners worry about hidden fees when choosing payment services. Square is relatively transparent compared to many POS platforms, although additional hardware, advanced software features and premium support options may involve extra cost.


Businesses should also factor in costs for accessories such as receipt printers, cash drawers and additional devices if operating across multiple locations.


Reviewing the full pricing structure before committing is essential to avoid unexpected charges.

Square vs traditional card payment providers:

Compared to traditional merchant service providers, Square offers a more flexible and accessible setup. There are no lengthy contracts for standard users, and businesses can begin accepting card payments quickly.


Traditional providers may offer slightly cheaper transaction fees for high-volume businesses, but they often involve monthly fees, long-term agreements and additional setup charges.


For many small businesses and start-ups, Square’s ease of use and straightforward pricing outweigh the benefits of marginally lower rates elsewhere.

Customer support and reliability

Square’s support includes online resources, troubleshooting tools and access to the customer support team. Businesses can also access setup guidance and step-by-step instructions through the Square platform.


As with any cloud-based POS system, reliability depends partly on maintaining a stable internet connection. However, Square offers offline payment functionality in some circumstances, helping businesses continue trading during connectivity interruptions. Payment processing in the UK is regulated by the Financial Conduct Authority.

Refunds and chargebacks

Square includes a refund and chargeback system to help businesses manage disputed payments. Chargebacks occur when a customer challenges a transaction through their card provider.


Businesses using Square can respond to disputes directly through their dashboard, providing evidence such as receipts and transaction data. While no payment system can eliminate disputes entirely, having integrated tools simplifies the process significantly.

Is Square suitable for your business?

Square is particularly well suited to small businesses, mobile traders, hospitality venues and businesses looking for a simple POS app without high upfront costs.


The platform’s flexibility, free POS app and range of hardware options make it attractive for businesses that need to accept payments quickly and manage transactions efficiently.


However, larger businesses with highly complex POS requirements or very high transaction volumes may benefit from comparing Square with alternative providers or negotiating custom pricing arrangements.

Managing finances alongside payment systems

While Square simplifies card payments and transaction management, businesses still need effective accounting and financial oversight. Payment systems alone do not replace proper bookkeeping, tax planning or financial management.


Integrating Square with accounting software can improve accuracy and reduce manual data entry, but working with experienced accountants ensures businesses remain compliant, tax-efficient and financially organised.


10CA supports UK businesses with bookkeeping, cloud accounting integration and financial management services designed to work alongside modern POS systems and payment platforms. To learn more about professional accounting support tailored to growing businesses, visit 10CA.

Conclusion

Square offers a flexible and accessible way for UK businesses to accept card payments, manage transactions and streamline day-to-day operations. From the basic Square Reader to advanced POS systems such as Square Register, the platform provides scalable tools for businesses of all sizes.


Understanding the features, fees and limitations of Square helps business owners choose the right payment solution while ensuring strong financial management practices remain in place.

Disclaimer

This article is for general informational purposes only and reflects publicly available information at the time of writing. Features, transaction fees and software functionality may change over time. Businesses should review official provider terms and seek professional advice before making financial or operational decisions.

Are your finances at risk of cyber-attack? Planning for the worst

By Charlie Flockhart • October 5, 2026
According to the latest Hiscox Cyber Readiness Report, almost two in five small businesses in the UK suffered a successful cyber-attack in the last year, with each attack costing an average of £26,650. Globally, cyber incidents cause around 32 hours of operational disruption a year on average. Cyber-attacks are no longer exceptional events, being viewed more as recurring costs, so businesses must prepare themselves financially for the impact. How should you prepare your finances in advance of a cyber-attack? A cyber-attack is slowly and sadly becoming a reality for many SME owners across the UK. To prepare, business owners should assess the potential financial risk a cyber-attack poses and forecast cash flow to ensure their business can survive one. It could also be beneficial to value your data assets to estimate the worth of any lost revenue and recovery expenses. Business owners may also want to keep offline playbooks. These are secure, printed offline copies of critical financial contacts, account numbers and recovery protocols to ensure that your business has key information in the event of a cyber-attack. Additionally, your business should establish strict double-check procedures for unusual payment requests or changes to supplier details to prevent business email compromise. You should also factor cyber insurance premiums into your operational risk management to ensure that you are prepared for any eventuality. What should you do to get your finances back in check after a cyber-attack? Should the worst-case scenario happen, once you are back on track, the first thing you should do is speak with your accountant. Your accountant will help you to calculate the exact monetary value of damaged assets, lost revenue and stolen money so that you know exactly where your business stands. They will then review your financial data and your tax records to establish a baseline for recovery and determine if the business can continue or if restructuring is necessary. Accountants can also help during complex cyber insurance claims by submitting the required evidence to ensure fair financial assessments of the business interruption costs. Once you have received any insurance payments, an accountant can advise on the tax implications.  How can we help? Cyber-attacks are becoming more prevalent for businesses up and down the UK. That is why it is imperative that you receive advice on how you can best prepare your finances in a worst-case scenario. Our team of accountants can help you to prepare your business for a cyber-attack and in the event of a cyber-attack, we can help you pick up the financial pieces. Get in touch with our team for support with preparing your business for a cyber-attack.

Borrowing amongst SMEs is on the rise – preparing your business for finance

By Charlie Flockhart • October 5, 2026
According to UK Finance, gross lending to SMEs from the main high street banks reached £5.35 billion in the second quarter of 2026, the highest quarterly level recorded since the pandemic. Real estate and professional service firms drove much of this growth, while manufacturers and hospitality businesses borrowed less. How can loans help SMEs? A loan can often be a lifeline for SMEs in a financial rough patch. It can help a business bridge cash flow gaps in the short term, ensuring that it has enough money to cover payroll, rent and supplier obligations. It could also be the case that a loan can help to fund expansion to increase business opportunities or hire more staff. Additionally, loans can help business owners to retain ownership of the company rather than selling equity to investors. However, SMEs need to remember that a loan must be paid back with interest regardless of business performance. How should SMEs prepare for a loan? Preparing your business for a loan can often be a tricky process. First, you will need to gather two to three years of profit and loss statements alongside cash flow forecasts and up-to-date tax filings. Next, you will have to check and correct any errors that may be on your personal or business credit reports in order to optimise your credit profile before borrowing. You will then have to create a strong business plan outlining your core growth strategy and market opportunity. There should be a clear breakdown of how the funds will be used, linking every borrowed pound to revenue generation, as well as a risk mitigation section addressing potential economic downturns. You must consider the lender that you are selecting by comparing criteria across high street banks and alternative providers.  How can an accountant help? An accountant can be one of your most valuable assets when applying for finance. They can help to improve your financial record-keeping, build advanced financial models and stress-test your cash flow to give lenders greater confidence in your business. We understand that it is tough for SMEs to obtain funding at the moment. That is why our team can help you obtain the loan that you need. For support with accessing loans, get in touch with our team.

Medium-sized companies may qualify for audit exemption

By Charlie Flockhart • October 5, 2026
The Department for Business, Innovation, Science and Trade (DBIST) initiated a ‘modernising corporate reporting’ consultation on 7 September 2026, which closes on 30 November 2026. Under the proposed overhauls, many medium-sized companies may be exempt from mandatory audits. This consultation forms part of a wider Government pledge to cut administrative burdens on businesses by 25 per cent by 2029. What is being proposed? The Companies Act 2006 considers various company size categories to assess which reporting, audit and disclosure requirements apply. For medium-sized businesses wanting to access exemptions currently exclusive to small companies, they must not exceed two of the following three thresholds: Turnover of £54 million Balance sheet total of £27 million Average of 250 employees Under these exemptions, many businesses would no longer need to have an audit, provide cash flow statements or prepare consolidated accounts. Elsewhere, the proposals from DBIST include: Introducing an SME accounting standard Allowing companies to calculate employee numbers on a full-time equivalent basis Removing strategic report requirements for most medium-sized private companies Simplifying financial reporting rules Is it always smart to forgo an audit? While the proposals mean audits may become optional for some SMEs, forgoing an audit isn’t always the smartest move. An audit can often go one step further than simple compliance and financial reporting, providing insights and peace of mind that your numbers are accurate. Lenders also often rely on audited accounts when deciding how much to lend and at which interest rate. Likewise, when it comes to selling a business, buyers and investors often look at audited figures when conducting due diligence as they offer greater credibility. For any businesses mulling the exemption, it is important to evaluate long-term plans and whether spending money on an audit could have benefits. At the moment, these changes are part of an ongoing consultation and so may be subject to change in future. We will bring you further updates as they emerge. Speak to an accountant to evaluate whether an audit may be beneficial to your business.