Best Card Machine for Sole Traders UK 2026

Sole traders face a payment challenge that limited companies rarely do: you are the business, so every fee, every failed transaction, and every day of delayed settlement comes directly out of your pocket. You probably do not have a dedicated accounts team to chase invoices or a finance director to negotiate rates. What you need is a card machine that is simple, honest on pricing, and does not tie you into a contract you cannot afford to exit.

What Does a Sole Trader Need from a Card Machine?

Sole traders need simplicity above everything else. You are unlikely to need a multi-till setup or a dedicated payments manager. What you do need is a machine that works reliably off a single charge through a full working day, connects over 4G without needing a venue's Wi-Fi, and starts taking payments within minutes of arriving at a job. For trades like plumbers, mobile hairdressers, and market stallholders, a card reader with at least eight hours of battery life and offline mode capability is worth prioritising. SumUp Air, for example, is rated for up to 500 transactions on a single charge and works over Bluetooth with your smartphone.

Pricing transparency is the second priority. Sole traders are often targeted with headline rates that exclude VAT or apply only to certain card types. A 1.69% rate sounds straightforward until you discover it rises to 2.5% or more for business cards or non-UK Visa cards. Before committing to any provider, check the exact rate for the card types your customers typically use. If most of your customers are UK consumers paying with a personal Visa or Mastercard debit card, flat rates from SumUp or Zettle will serve you well. If you take a lot of corporate cards or American Express, compare carefully.

Fee Comparison: Best Options for Sole Traders

Our Top Pick for Sole Traders

SumUp is the strongest choice for most sole traders in 2026. The transaction fee of 1.69% per transaction for UK consumer Visa and Mastercard cards is the lowest flat rate available from a major UK pay-as-you-go provider. There is no monthly fee, no minimum monthly turnover requirement, and no cancellation penalty. The SumUp Air reader costs £39 plus VAT as a one-off purchase, and you can be accepting payments within a few hours of ordering. For a sole trader doing £3,000 a month in card sales, that works out to roughly £50.70 in transaction fees with nothing else on top.

Settlement lands in your linked bank account within one to two business days in most cases. SumUp also offers an optional SumUp Business Account, which can speed settlement to the same day if you choose to hold funds there rather than transfer to an external bank. The app is straightforward, the reader is small enough to fit in a jacket pocket, and customer support is available by phone during business hours. The FCA authorises SumUp as a payment institution under registration number 900593.

The honest negative: SumUp's customer support has attracted complaints about slow response times during peak periods, and its chargeback handling process can be slow if a customer disputes a payment. For most sole traders taking low-value everyday transactions, this is an acceptable trade-off. Read the full SumUp review on Compare Card Fees for a complete breakdown of fees and features.

Runner-Up Options

Zettle by PayPal

Zettle charges 1.75% per transaction across most UK consumer card types, which is six basis points higher than SumUp. That difference costs roughly £1.80 extra per £3,000 of monthly sales. Where Zettle earns its place is flexibility: if you already use PayPal for online invoicing or digital sales, Zettle keeps everything in one ecosystem and lets you move money between your PayPal balance and your card reader account without extra steps. The Zettle card reader costs £29 plus VAT for your first reader, which is cheaper than SumUp's upfront cost. There is no monthly fee and no contract. The FCA authorises PayPal (Europe) S.à r.l. et Cie, S.C.A. to operate in the UK. One real weakness: Zettle's point-of-sale inventory tools are limited compared with Square, so if you sell products as well as services, Square may suit you better. See the full Zettle review on Compare Card Fees for more detail.

Square

Square charges 1.75% per transaction with no monthly fee on its free plan, matching Zettle on price. Where Square stands out for sole traders is the quality of its free point-of-sale app. You get a proper product catalogue, basic inventory tracking, customer directory, and digital receipts at no extra cost. If you sell physical goods at markets or pop-up events, those tools save you from buying separate software. Square's free card reader is available on request, though the Square Reader for contactless and chip costs £19 plus VAT and is the more practical option. Settlement arrives in your linked UK bank account by the next business day for most major banks. The honest limitation: Square's UK phone support is not available 24 hours a day, and advanced features like team management or payroll require a paid plan starting at £20 a month plus VAT. Read the Square review on Compare Card Fees before deciding.