How to Review a Merchant Agreement Properly

October 5, 2026

A card terminal quote can look attractive until the first full month of trading reveals extra fees, a long notice period or a system that does not speak to your till. Knowing how to review a merchant agreement means looking beyond the headline card rate and checking whether the whole arrangement suits how your business actually takes payments.

For a café at a busy morning peak, speed at the counter and a reliable EPOS link may matter more than saving a fraction of a percentage point. For a mobile tradesperson, a flexible agreement and dependable 4G connection may be the priority. The right agreement is not simply the cheapest one. It is the one that makes commercial and operational sense, with costs and commitments you can explain before you sign.

Start with the documents, not the sales summary

Ask for the full merchant agreement, the schedule of fees, terminal or EPOS rental terms, and any applicable service terms. A proposal or order form is useful, but it rarely contains every condition that affects your costs or your ability to leave.

First, establish who is providing each part of the service. The acquiring bank or payment processor accepts and settles card payments. A terminal provider may supply the card machine, while an EPOS supplier may provide the till software and hardware. These can be one supplier or several. If they are separate, you may have separate contract lengths, support routes and cancellation requirements.

Check that the legal business name, trading name, company number where relevant, bank account and premises details are correct. Errors can delay approval, settlement or future changes to your account. If you operate more than one site, confirm whether the agreement covers all locations and whether each terminal is assigned correctly.

How to review a merchant agreement line by line

The commercial detail is usually spread across the fee schedule and terms and conditions. Read them together. A low advertised rate may apply only to a particular card type, a limited turnover band or a specific acceptance method.

Separate card rates by payment type

Do not rely on one line marked “card rate”. Ask for a clear breakdown of what you will pay for UK consumer debit cards, UK consumer credit cards, business cards, international cards and cards issued outside the UK. Transactions taken face to face, online, through a payment link or by virtual terminal can also be priced differently.

You may see blended pricing, where one percentage rate is quoted for a category of cards. Alternatively, an interchange++ model separates interchange, scheme fees and the processor’s margin. Neither approach is automatically better. Blended pricing can be simpler to forecast, while interchange++ can offer more visibility, particularly for businesses with higher card volumes or a mixed customer base. The useful question is what your actual card mix would have cost over the past three to six months.

Check whether the provider can change its margin, introduce a minimum transaction charge or alter rates after a stated notice period. Some changes are reasonable where card schemes alter their fees, but the agreement should make clear what can change, why and how much notice you receive.

Add up the charges beyond the transaction rate

A meaningful cost comparison includes every recurring and event-based charge, not just merchant service charges. Look for terminal rental or purchase costs, SIM or connectivity charges, monthly gateway fees, PCI DSS administration fees, statement fees, chargeback fees, refund fees, authorisation charges and next-day settlement fees.

For example, a takeaway using an online ordering system may need both a payment gateway and a virtual terminal. A retailer may need several countertop readers, an EPOS software subscription and replacement cover. These may all be worthwhile, but they need to be shown as part of the total monthly cost.

Ask whether fees are charged per merchant account, per outlet, per terminal or per transaction. Also ask whether quoted prices exclude VAT. A clear illustration using your own recent volumes is more useful than a generic estimate based on an assumed average sale value.

Check settlement timing and reserve provisions

Settlement is the point at which accepted card takings reach your bank account. Confirm the expected timing for each payment type, the daily cut-off time and whether weekends and bank holidays affect it. Cash flow can be tight for hospitality, retail and events businesses, so a difference of a day or two may matter.

Read the clauses dealing with reserves, delayed settlement and withheld funds. Acquirers may use these measures where they see a higher risk of refunds, disputes or non-delivery. That can be appropriate for some trading models, but you should understand when it could happen, how much may be held and what evidence is needed to release funds. If you take deposits for future services, sell tickets or accept large orders in advance, raise this early in the application process.

Treat the contract term and exit route as a cost

A competitive rate loses value if it commits you to unsuitable equipment or a poor service for several years. Find the minimum term, the notice period, the renewal position and the cancellation process. These may be different for card processing, terminals, EPOS software and broadband or mobile connectivity.

Look carefully for automatic renewal wording. Some agreements roll into a new fixed period unless written notice is served within a defined window. Make a note of the date, the required notice method and the address or portal to use. Keep proof that notice has been given.

Early termination charges need particular attention. The agreement should explain how they are calculated. It could be a fixed fee, remaining rental charges, an estimate of lost processing income, or a combination. Ask what happens if you close a site, sell the business, change legal entity or need to replace a terminal that is no longer fit for purpose.

If equipment is rented, check who owns it and whether it must be returned. Understand the return deadline, condition requirements and potential non-return charges. Do not assume a terminal is yours simply because you have paid for it each month.

Confirm the setup works at the point of sale

A merchant agreement does not operate in isolation. It needs to support the way staff take orders, reconcile takings and deal with customers. Before signing, confirm the proposed card reader, EPOS system, payment gateway and any integrations are compatible with your exact setup.

For an independent restaurant, integrated payments can reduce manual keying and make end-of-day reconciliation quicker. For a market trader, a standalone mobile terminal may be more practical than a full till integration. A professional-services firm may need secure payment links or a virtual terminal for invoices taken by phone. Compatibility should be verified, not assumed from a product name or a general claim that a system “integrates”.

Ask who supports each part if something goes wrong. Is there a single helpdesk for terminal faults, failed settlement and EPOS issues, or will you need to contact different providers? Establish replacement arrangements, support hours and whether an engineer visit is included. A low monthly price can be a false economy if a faulty reader stops a busy Saturday’s trade.

Check security, disputes and your day-to-day responsibilities

Merchant agreements put obligations on the business as well as the provider. Most merchants will need to complete PCI DSS requirements, typically through an annual questionnaire or a supported compliance service. Check what is required, whether there is a charge and what happens if it is not completed. Non-compliance fees can appear unexpectedly on statements.

Read the rules around chargebacks and retrieval requests. You need to know how quickly you must respond, how evidence should be submitted and what fees apply. A retailer may need proof of collection; a service business may need signed terms, invoices and evidence the work was completed. No provider can remove all chargeback risk, but clear records and prompt responses put you in a stronger position.

Also check your obligations around refunds, keeping terminal receipts, protecting customer card data and reporting suspected fraud. If you take card details over the phone, confirm that your process is suitable and that staff are not writing down or storing card data where they should not.

Use your own statements to test the proposal

The most reliable comparison starts with recent merchant statements, not a guessed monthly turnover. Take three to six months of statements and identify total card turnover, transaction numbers, average transaction value, card types, current monthly fees and any one-off charges.

Then test a new proposal against those figures. Ask for the assumptions in writing, especially where rates vary by card type. Compare the likely total cost, the agreement length, the equipment supplied, settlement timing and any changes to your workflow. If the provider cannot explain a charge in plain language, pause before committing.

A payment review should also identify what is already working. You may not need to replace every part of your setup. In some cases, keeping a compatible EPOS system and changing the acquiring arrangement is sensible. In others, an integrated replacement may reduce queues, manual errors and reporting time enough to justify the change.

S2S Payments follows a review-first approach because the best route depends on your costs, contract position, trading environment and required integrations. Final approval, pricing and terms still come from the relevant acquiring and technology providers, so make sure the final documents match what has been discussed.

Before you sign, give yourself enough time to read the agreement away from the pressure of a sales conversation. A provider that suits your business should be able to explain the next step clearly, answer specific questions about costs and compatibility, and give you the information needed to make a confident decision.