@Bathshebahardy
A lot of mobile small businesses like window cleaners use handheld card readers these days. They only cost £50 or so to buy. You link or bluetooth them to your mobile phone.
It’s possible to get them cheaper as well.
SumUp and Zettle readers are £29.99, they have had offers such as £19.99 and Squares reader is £19.20
What you may manage to do is go onto their websites, put a card reader into the cart then leave it. The system may then later email you an ‘offer price’ as cheap as £5
For the seller using it the thing that matters is the cost of sales with any subscription fee, the transaction fee and the timing of transfer to their bank. Then compare that to the cash deposit fee into their business account.
For my friends shop pre lockdown the majority of sales were cash, so they used a card reader service that had no monthly fee, the lowest transaction fee but payments were transferred over the next x working days. But cash sales cost them to bank irrespective of amount.
The delay in banking wasn’t an issue as the shop consists of multiple traders, mostly arts and crafts who get paid for their sales each month. There was little need to have money in the bank quickly to buy in more stock - just to have enough banked at the end of the month for transfers to each trader
During lockdown card sales went up, so they are considering card processing via the bank which will incur monthly costs but a cheaper transaction charge. If enough card sales are maintained then it will be cheaper
Another friend used a card machine but she needs to restock quickly as she goes to events every weekend during the season, if she has a good show with lots of sales then she needs to replenish base materials almost immediately to allow her to then make enough goods for the next weekend. Cash sales then mean she has to bank them before paying suppliers, and she uses a card service with a slightly lower rate which gives her faster payments.
Neither should be dictated on as to whether they take card, cash or both.
They both take all options, and unless it’s a big sale then the cost difference of using cash or card is negligible.
Whether or not they handle cash or card they still need to pay suppliers. It’s not always the case that ‘cheaper for cash’ is hiding from the taxman.
Sometimes it’s cheaper to handle cash - it is spent with the wholesalers / trade store and doesnt get banking fees or transaction fees
Sometimes it influences the customer that they think they are getting an extra special deal on the side
(If your builder is doing everything normally, gives you a quote & bill, plus certificates for the work where applicable, but you’re buying materials and paying cash to the builder then that may be all above board, if they won’t give a bill then it doesn’t exist and you also have no warranty etc)