Card Machines for Builders & Contractors UK 2026

Builders and contractors face a payment challenge most office-based businesses never encounter: you finish a job on a muddy site, hand over an invoice, and then wait days for a bank transfer that may never arrive on time. Accepting card payments on the spot removes that friction, cuts late payment disputes, and gets money into your account faster. The right card machine for a contractor needs to work reliably away from Wi-Fi, hold its charge through a full working day, and cost less than chasing invoices does.

Who Is This Page For?

This page is written for self-employed builders, general contractors, groundworkers, scaffolders, and small construction firms who want to accept card payments from domestic or commercial clients. It covers sole traders taking deposits on the doorstep, small building firms processing stage payments of hundreds or thousands of pounds, and contractors who move between multiple sites in a single week. If you run a larger construction company with a dedicated accounts team, a full merchant account is likely a better fit than the portable readers covered here.

What Does a Builder or Contractor Need from a Card Machine?

Battery life and connectivity are the two most important factors for builders. A reader that needs a Wi-Fi connection is useless on a new-build plot or a rural renovation. You need a device that connects over 4G independently, holds a charge through an eight-hour working day, and can survive the dust and occasional knock that comes with construction work. The SumUp Solo and Zettle Terminal both connect via 4G without needing a paired smartphone, which makes them far more practical on-site than Bluetooth-only cube readers.

Transaction size also matters more for contractors than for most trades. A plumber might take a £200 payment; a builder might take a £5,000 deposit on a kitchen extension. Many portable readers cap contactless at £100, so you need chip-and-PIN for larger amounts. You should also check whether your provider supports payment links, because some clients prefer to pay remotely by card once they receive a written quote. Providers like Square and SumUp both offer payment links at no extra monthly cost, which is useful when you invoice after the job rather than collecting on-site.

Fee Comparison: Best Options for Builders & Contractors

Our Top Pick for Builders & Contractors

SumUp is the strongest overall choice for most builders and contractors in 2026. The SumUp Solo with Printer is a standalone 4G terminal with a built-in receipt printer and an all-day battery, sold as a one-off hardware purchase of around £99. There is no monthly fee on the pay-as-you-go plan, and the 1.69% transaction rate applies to all UK and European personal Visa and Mastercard payments. On £8,000 of monthly card turnover, that works out at roughly £135 in fees, with no contract tying you in if work slows down over winter.

The SumUp One subscription, at £19 per month, reduces the transaction fee to 0.99% for the same cards. At £8,000 monthly volume that saves around £56 a month after the subscription cost, so it pays off at roughly £2,700 monthly card turnover. SumUp also offers free payment links, a basic invoicing tool, and next-business-day settlement into a UK bank account. Settlement is confirmed by 7am, which is useful when you need to check your account before buying materials in the morning.

The honest weakness is that SumUp's customer support is email and chat only. If your terminal stops working mid-job, you cannot phone a helpline and speak to someone immediately. For most contractors that is an acceptable trade-off given the low cost, but it is worth keeping a backup payment link option available just in case. Read the full SumUp review on Compare Card Fees for a detailed breakdown of hardware options and fees.

Runner-Up Options

Zettle by PayPal

Zettle is a strong runner-up, particularly for contractors whose monthly card volume varies significantly between busy and quiet periods. The tiered rate structure means you pay 1.75% on the first £2,000 each month and just 1% on everything above that, with no monthly subscription required. On a £12,000 month, that blended rate works out at approximately 1.13%, which is competitive without any commitment. The Zettle Terminal 2 connects over 4G independently and has a quoted battery life of eight hours of active use. One drawback is that settlement goes via PayPal first, which adds a step if you prefer funds directly in your business bank account. You can set up automatic transfers to your bank, but it is an extra configuration step that some users find frustrating. Read the full Zettle review on Compare Card Fees for hardware costs and settlement details.

Square

Square is the best choice for builders who invoice clients after completing a job rather than collecting payment on-site. The free invoicing tool lets you send a professional invoice with a built-in card payment link directly from the Square app, and clients can pay by Visa or Mastercard without needing a card reader present. In-person transactions cost 1.75% per transaction, the same as Zettle, but there is no tiered discount at higher volumes. The Square Reader is Bluetooth-only and relies on a paired phone for connectivity, which is a limitation on sites without mobile signal. If you need a fully standalone 4G terminal, Square is a weaker choice than SumUp or Zettle on that specific point. Read the full Square review on Compare Card Fees for a full comparison of hardware and invoicing features.