A card machine for tradesmen solves the oldest problem in the trade: finishing the job, sending the invoice, then spending three weeks chasing the money. Take payment on the doorstep before you pack the van and that problem disappears. This guide covers the readers that actually work for plumbers, electricians and builders, what a £280 job really costs you in fees, and how to take deposits for materials without any awkwardness.
Why tradesmen should take card payments on the doorstep
The single biggest reason to carry a card reader is not convenience. It is that 'I'll do a bank transfer tonight' sometimes means tonight, sometimes means next month, and occasionally means never. A tap on a reader before you leave the job means the money is already on its way to your account.
There is also a quieter benefit: customers who pay on the spot rarely dispute the bill later. The work is fresh, they have seen it done, and the transaction is closed. Chasing an invoice six weeks on, when the memory of the leaking pipe has faded, is a much harder conversation.
And the cash-in-hand era is genuinely winding down. Plenty of customers simply do not carry £280 in notes anymore, and HMRC's appetite for digital records grows every year. Card payments create a clean trail that makes your bookkeeping and VAT returns easier, not harder.
The best card machine for tradesmen: what to look for
You need three things in a van: a reader that works without Wi-Fi, no monthly contract, and a fee you can actually calculate. That points squarely at pay-as-you-go readers rather than rented terminals with 18-month agreements.
The main contenders look like this:
- SumUp: £19 reader, 1.69% flat per transaction, no contract. Pairs with your phone for connectivity.
- SumUp Solo (~£79): has its own SIM, so it works on any job with mobile signal even if your phone battery dies.
- Square: £19 reader, 1.75% flat, plus free invoicing software that suits quoted work.
- Zettle: £29 reader, 1.75%, pays into a PayPal account, which suits you only if you already live in PayPal.
- Dojo, Worldpay and Tyl: quote-based contracts, generally aimed at busier fixed premises. Get a written quote and check the exit terms before signing anything.
The fee maths on a £280 job
Say you charge £280 to replace a consumer unit. On SumUp at 1.69%, the fee is £4.73, so you keep £275.27. On Square at 1.75%, it is £4.90. Either way, you have given up less than a fiver to be paid before you have even started the van.
Compare that to the real cost of an unpaid invoice: the second visit to drop a reminder through the door, the awkward phone calls, the hour of admin. If chasing money costs you even one billable hour a month, the card fees have paid for themselves several times over. Run your own numbers through our card machine fee calculator with your actual job values.
One caveat: if you regularly take very large payments, say £3,000 for a bathroom refit, flat-rate fees start to sting. £3,000 at 1.69% is £50.70. At that level it is worth comparing providers properly on our card machine comparison, or splitting the job into a deposit and balance.
Pay-by-link for invoiced work
Not every job ends with the customer standing next to you. For commercial work, landlords, or jobs where you invoice after the fact, a payment link does the same job as the reader: you text or email a link, they tap it, they pay by card from wherever they are. Most of the app-based providers include this at no extra monthly cost.
Some providers also offer a virtual terminal, which lets you type a customer's card details into your phone or laptop while they read them out over the phone. Handy for deposits from customers who will not touch a link. Note that card-not-present payments usually carry a slightly higher fee than tapping the reader, because the fraud risk is higher.
The trick is to put the payment link on the invoice itself. An invoice with a 'pay now' button gets settled faster than one ending with sort code and account number, because you have removed every excuse to put it off until payday.
Taking deposits for materials
If you are fronting £600 of boiler before you have earned a penny, a deposit is not cheeky, it is basic cash flow. A card deposit taken at the quote stage, by link or over the phone, commits the customer and funds the merchant's trip.
Keep it simple and in writing: state the deposit amount, what it covers, and when the balance is due. A short line on the quote is enough. If the customer pushes back on a reasonable materials deposit, treat that as useful information about how the final invoice might go.
Card deposits also give the customer some protection, since card payments carry dispute rights that a bag of cash does not. That cuts both ways, so do the work you quoted and keep photos. Check your provider's current terms on how deposits and disputes are handled.
Records, VAT and keeping the taxman happy
Every card payment lands in your account with a timestamp, an amount and a paper trail. Come January, your accountant reconciles a clean statement instead of deciphering a glovebox full of receipts. If you are VAT registered, or heading toward the threshold, that record-keeping stops being a nice-to-have and becomes essential.
Most reader apps also produce simple sales reports, and providers like Square bundle free invoicing that keeps quotes, invoices and payments in one place. See our tradesmen POS guide for how far you can get without paying for software.
Yes, card income is visible income. If your business model depends on it not being visible, a card reader is the least of your problems.
Who should buy what: the short version
Sole trader doing domestic jobs: buy a SumUp or Square reader for £19, pay the flat rate, done. If you work in areas with patchy phone reception or you are hard on phone batteries, the SumUp Solo with its own SIM is worth the extra. Browse the full field of no-monthly-fee card readers before you buy.
Bigger outfits with several vans and £20,000+ a month going through cards: a quote-based provider like Dojo or Worldpay may undercut the flat rates, but only with volume, and only if the contract terms suit you. Never sign without knowing the exit fee. Check your agreement carefully.
Who should walk away from card payments entirely? Almost nobody, honestly. The only tradesperson who does not benefit is one whose every customer is a builder's merchant account or a commercial client on 30-day terms, and even then a payment link on the invoice speeds things up.
FAQs
What is the best card machine for tradesmen in the UK?
For most sole traders, a SumUp reader (£19, 1.69% per transaction, no contract) or Square reader (£19, 1.75%, free invoicing included) covers everything. If you work in areas with poor phone signal, the SumUp Solo at around £79 has its own SIM card and works independently of your phone.
How much does a card machine cost a plumber or electrician per job?
On a £280 job, a 1.69% flat fee costs £4.73 and 1.75% costs £4.90. There are no monthly fees on pay-as-you-go readers, so quiet months cost you nothing. On very large jobs the percentage adds up, so compare providers if you regularly take £2,000+ in one payment.
Can tradesmen take card payments without a card machine?
Yes. Payment links sent by text or email let customers pay by card remotely, and a virtual terminal lets you key in card details given over the phone. Both suit invoiced and deposit work, though card-not-present rates are usually slightly higher than in-person taps.
Should tradesmen take deposits by card?
Yes, especially when you are buying materials upfront. A card deposit taken by payment link commits the customer and protects your cash flow. Put the deposit amount and what it covers in writing on the quote, and check your provider's current terms on deposits.
