What Is a PDQ Machine? UK Card Machine Guide

A PDQ machine is a card machine: the device a UK business uses to take a debit or credit card payment in person. PDQ is a long-standing UK term for a card terminal and is often said to mean 'Process Data Quickly', though the exact origin is not reliably established. It is now used interchangeably with card terminal, card machine and card reader. If a supplier quotes you for a PDQ machine, they are quoting you for a card machine.

The device itself is only part of what you are buying. Taking card payments needs three things: a merchant account or payment service agreement with a provider, a terminal that meets the applicable security requirements for handling card data, and a settlement arrangement that moves the money into your bank account. The PDQ machine is the visible part; most of the cost sits in the agreement behind it.

UK providers supply four common formats. The right one is decided by where and how you take payment, not by price.

The sequence is the same on every terminal. The customer taps, inserts or swipes; the terminal encrypts the card data and sends an authorisation request through your provider to the card scheme and then to the customer's bank; the bank approves or declines in about a second; the terminal prints or displays the result.

The money does not move at that moment. Transactions are batched and cleared overnight, then settled to your provider, who pays out to your business bank account on the schedule in your agreement. That gap between the terminal beeping and the funds arriving is your settlement time, and it varies by provider and by contract.

There is no single price for a PDQ machine in the UK, because quotes are built from several separate charges and providers weight them differently. Rather than compare headline percentages, compare the categories below and then work out your effective rate: total card payment costs for a month divided by total card turnover for that month.

Traditional acquirers usually rent the hardware on a monthly agreement. Newer providers more often sell the device outright with no rental line at all. Rental is frequently the largest recurring cost on a small UK merchant statement, and the one owners forget to include when they compare rates.

The arithmetic is worth doing before you sign. Multiply the monthly rental by the full minimum term, add any setup or service charges shown on your written quote, and compare that total with the outright purchase price of the same or a comparable device. Rental is not automatically the wrong choice, because it usually bundles replacement cover and support, but it should be a deliberate decision rather than an assumption.

A PDQ machine arrangement is usually two agreements, not one: the merchant or payment services agreement and the terminal hire agreement. They can have different lengths, different notice periods and different exit charges, and the hire agreement often outlives the merchant agreement.

Before signing, establish the initial term, the notice period, whether the agreement renews automatically, what the early termination charge would be, and who owns the device at the end. Businesses that get stuck are almost always stuck on the hardware agreement rather than on the processing itself.

Connectivity decides which machine works for you. Ethernet is the most reliable option and suits a fixed counter. Wi-Fi is flexible but only as dependable as the premises network, which matters in busy venues and thick-walled buildings. A 4G SIM keeps working away from your own network and is the usual answer for trades, events and markets. Bluetooth pairing to a phone suits occasional acceptance but ties acceptance to a charged handset.

Ask what happens when connectivity drops. Some terminals support an offline mode that stores transactions for later authorisation, which carries a risk of declines being discovered after the customer has gone. Whether that is acceptable depends on your average transaction value.

Payment terminals used in the UK should meet applicable PCI PTS/security requirements, and providers are responsible for supplying compliant hardware and for keeping supplied devices up to date. Terminals remain valid for a defined security period; older devices eventually fall outside the applicable requirements and have to be replaced.

PCI DSS obligations sit partly with you as well. Most small in-person merchants complete an annual self-assessment questionnaire and, where required, a network scan. Providers commonly charge a compliance fee, and some charge a higher non-compliance fee if the assessment is not completed, so completing it on time is usually the cheapest thing you can do in a year.

Practical basics still matter: keep terminals physically secure, never write down card details, train staff on what a tampered device looks like, and report a lost or damaged terminal immediately.

Match the machine to how you trade, then compare the commercials across providers offering that format.

Put two or three quotes side by side and price them against your own last statement rather than a sample basket. Include every fixed charge, not just the percentage, and check the terminal hire term separately from the processing term.

If you already take card payments, your existing statement is the best benchmark you have. It shows your real card mix, your real average transaction value and the total you actually paid, which is the only fair basis for comparing a new quote.