Accepting card payments is now a baseline expectation for UK customers, whether you run a high-street café, a plumbing business, or a weekend market stall. With dozens of providers competing for your account, choosing the right card machine for your small business takes more than picking the cheapest monthly fee. The wrong setup can quietly cost you more than you planned.
Understanding the Costs Behind Every Transaction
Most providers quote a headline transaction rate, but the full cost picture includes more than that. Look carefully at these fee categories before signing anything.
- Transaction fee — a percentage taken from each card payment, sometimes split into different rates for debit and credit cards.
- Monthly terminal rental — a fixed charge for the hardware, often between £15 and £40 per month depending on the device type and provider.
- Authorisation fees — a small flat fee charged per transaction on top of the percentage rate, common with traditional acquiring banks.
- Minimum monthly service charge — if your card turnover is low in a quiet month, some providers charge a floor fee regardless.
Always ask for the full schedule of charges in writing before committing. If a provider cannot produce a clear fee breakdown, that is a warning sign worth heeding.
Mobile Versus Countertop Terminals
The physical setup of your business should drive your terminal choice. Using the wrong type adds friction for staff and customers alike.
- Countertop terminals — designed for fixed locations such as till counters in shops or restaurants. They connect via broadband or a fixed phone line and tend to offer faster, more stable connections.
- Portable terminals — connect via Wi-Fi and can move around a premises. Suited to table-service restaurants or businesses where the customer should not leave their seat.
- Mobile terminals — use a SIM card to connect over a mobile network. Ideal for tradespeople, market traders, mobile beauticians, and delivery businesses where there is no fixed site.
Some providers now offer app-based solutions that pair with a compact card reader via Bluetooth. These can work well for very low-volume sellers but may carry higher per-transaction costs than a dedicated terminal contract.
Step-by-Step: How to Compare Card Machine Providers
- Step 1 — Estimate your monthly card turnover. Most providers tier their pricing by volume. Knowing your approximate monthly revenue from cards gives you a realistic cost comparison.
- Step 2 — Shortlist providers that match your trading model. If you work on-site at clients' premises, only consider mobile-capable solutions. Do not pay for a countertop you cannot use.
- Step 3 — Request a full written fee schedule. Ask specifically about transaction rates, rental, minimum monthly charges, and any PCI compliance fees.
- Step 4 — Check the contract length and exit terms. A rolling monthly contract gives flexibility; a 24-month fixed deal may offer lower rates but penalises early termination.
- Step 5 — Ask about settlement speed. Most providers settle funds within one to three working days. Some offer next-day settlement, which matters significantly for businesses managing tight cash flow.
Settlement Speed and Contract Length Matter More Than You Think
Settlement speed — how quickly card payments arrive in your bank account — directly affects your working capital. A provider settling on day three instead of day one can create a meaningful gap if you are paying suppliers weekly.
Contract length carries a similar weight. Longer contracts often come with reduced transaction rates, which is worthwhile if your volume is consistent. However, if your business is seasonal or still growing, a flexible rolling agreement protects you from expensive early exit fees.
How Your Card Revenue Can Support Business Finance
A track record of consistent card payments is increasingly recognised by alternative lenders as evidence of trading health. If you process card payments regularly, that data can support an application for a merchant cash advance — a form of funding where repayments are taken as a percentage of future card sales rather than fixed monthly instalments.
This makes the merchant cash advance particularly practical for businesses with variable income. Explore how Aarubi supports card-based businesses through our card machine and payments hub.
Action Checklist
- Calculate your average monthly card turnover before approaching any provider
- Request a full written fee schedule including rental, transaction rates, and minimum charges
- Confirm whether settlement is next-day, two-day, or three-day and factor this into your cash flow plan
- Check the contract length and what early termination costs
- Match the terminal type to where and how you actually trade
- Ask whether the provider reports to your bank or integrates with your accounting software
- Keep a record of your card revenue history — it may support a finance application later
