SumUp has/had the cheapest rate, at 1.69% and a similar alternative is Zettle at 1.75%
They have no monthly fees, with the only other cost being the card reader itself.
A non guaranteed trick is to search for card readers on the internet and put a SumUp and/or a Zettle into the basket on a few sites. Then don’t complete the purchase. Wait and you may then get contacted with ‘reminders’ and potential offers.
Intercard advertises fees of 1%
(though I note that they also quote an ‘authorisation charge’ of 1p per transaction ….. which implies its 1% plus 1p)
That could mean that a £1 sale on all of the above would have a fee of 2p due to rounding but when transactions are higher then there begins to be a difference in the fees.
Intercard readers seem to only start with 3g connected readers, whereas SumUp and Zettle can provide cheaper Bluetooth readers as well as 3g readers.
Bluetooth readers need to be run via a smartphone or tablet with their own connection, but are cheaper (or potentially free)
An intercard probably starts at around £80, and SumUp/Zettle £40 for app based (but there are always deals to be found) and £80 plus for readers with their own connections
To process a card sale you need the reader to hand, so one reader means one person can take card payments - which can be managed by a PTA.
But if you have multiple readers then different people can log on at once and take payments separately
They can all log on to the same account and take payments without conflicting - but that potentially means they could reset the bank account, so you can create ‘staff accounts’ to let other people take payments without additional capabilities
Note that the PTA does not have to own the machines, you just need the bank account and to set up an account with the relevant processing company. Then you can borrow readers if you know people with them - or get one reader for the PTA and borrowed ones on an event day for extra stalls etc
(It’s that simple with the app based ones as you log in on the app, but independent self connected readers are set to the account it pays into)
If you want printed receipts then you need one of the upgraded readers, but the apps give the option of a text or email receipt