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The best payment system for a small business is the one that fits how customers buy, how quickly the business needs reliable payment status and how the total cost changes as sales grow.
A shop counter, an invoice and a subscription service do not need the same payment journey. Most businesses will use two or three methods rather than force every customer through one route.
This comparison covers six practical options for UK small businesses. It avoids promotional headline rates because provider pricing and contract terms change. Check the live price, hardware, payout and support terms before choosing.
Quick comparison
| Payment system | Best fit | How costs are usually charged | Important check |
|---|---|---|---|
| Pay by Bank | Invoices, payment links, QR journeys and higher-value sales | Fixed fee or subscription allowance | Bank coverage, customer journey and the status shown to staff |
| Card terminal and POS | Fast, familiar counter payments | Hardware plus a percentage or transaction fee | Contract length, payout timetable and offline behaviour |
| Online card checkout | Ecommerce and saved-card journeys | Percentage plus a fixed transaction fee | Integration, fraud controls and payout terms |
| Payment links | Remote services and simple invoices | Depends on the underlying card or bank payment | Expiry, reference handling and confirmation |
| Direct Debit | Regular bills with variable amounts or dates | Fixed fee, percentage or a blend | Mandate setup, notice requirements and collection timing |
| Manual bank transfer or cash | Occasional low-volume use | Often no acceptance fee | Matching, errors, security and admin time |
1. Pay by Bank
Pay by Bank lets a customer approve a prepared account-to-account payment through their bank. The business creates the request with the amount, recipient and reference. The customer selects their bank, authenticates there and authorises the payment.
That sequence matters. Authentication confirms the customer to their bank. Authorisation records their approval. A later payment status reports what happened to the payment. These stages should not be collapsed into one message saying that money has arrived.
Pay by Bank can work well for payment links, invoices, QR payments and businesses that want an alternative to percentage-based card charges. Wonderful publishes its current subscription allowances and overage fees on its plans and pricing page. Check that page for the live position rather than relying on an old article.
Choose it when: a prepared payment, clear reference and direct bank approval suit the sale.
Check first: supported banks, customer adoption, integrations and exactly which payment status the business receives. Our step-by-step Pay by Bank guide explains the full sequence.
2. Card terminal and point of sale
Card terminals remain the familiar option for fast counter payments. A modern POS can combine checkout, receipts, stock and staff reporting. That convenience can be valuable even when another method has a lower acceptance cost.
Compare more than the advertised transaction rate. Include hardware rental or purchase, minimum terms, premium card rates, optional POS software and the provider's payout timetable. Card authorisation at the till is not the same event as the later payout to the merchant.
Choose it when: speed, broad familiarity and a conventional counter journey matter most.
Check first: total monthly cost at realistic sales, contract length, connectivity and access to funds.
3. Online card checkout
An online card gateway accepts card details within an ecommerce or booking journey. It is often the most straightforward way to serve customers who expect to pay by card and can support repeat purchases where the provider and customer permissions allow it.
The commercial model usually combines a percentage and a fixed amount per transaction. International cards, currency conversion, fraud tools and premium features may change the final cost.
Choose it when: an established ecommerce integration and card familiarity are central.
Check first: the full fee schedule, payment failure handling, payout timing and whether the checkout works well on mobile.
4. Payment links
A payment link turns a remote request into a guided payment. It can be sent with an invoice, by message or after a job. The link is only the delivery method: the underlying payment may still be a card payment or Pay by Bank.
Good links carry the correct amount and reference, expire when appropriate and return a useful result to the business. They reduce the need for customers to copy bank details, but the business still needs to distinguish a viewed link, an authorised payment and a completed payment status.
Choose it when: the business needs to collect a one-off payment without building a checkout.
Check first: what the customer sees, when the link expires and how the payment is reconciled.
5. Direct Debit
Direct Debit is designed for collections initiated under a mandate. It is useful for regular bills where the amount or date may vary, such as memberships, utilities or ongoing services. It is not the same as a customer approving a new Pay by Bank payment at checkout.
The collection timetable, mandate process and required customer notices affect the experience. Compare providers on setup, collection and failure handling, not only the transaction fee.
Choose it when: predictable repeat collection matters more than immediate customer approval for every payment.
Check first: mandate administration, notice periods, collection dates and reconciliation.
6. Manual bank transfer or cash
A manual bank transfer can look free, but it moves work into administration. Customers must enter the right payee, amount and reference. Staff then have to identify the receipt and match it to the sale. Cash creates its own handling, counting, banking and security work.
These methods can still be sensible for occasional use. The right comparison includes staff time, error handling and the delay between a customer saying they have paid and the business confirming the correct receipt.
Choose it when: volume is low and the existing process is genuinely simple.
Check first: reconciliation time, controls around bank details and cash handling.
How to choose
- Start with the sale. Write down where customers pay: at a counter, on a website, after an invoice or on a schedule.
- Model the full cost. Include subscriptions, hardware, percentage fees, fixed fees and staff time.
- Separate the payment stages. Decide what staff need to know at authorisation, processing, execution and receipt.
- Check access to funds. Read the provider's current payout or payment-status terms.
- Test the customer journey. Run a real mobile payment before committing.
- Keep a fallback. One method will not suit every customer or every outage.
For a closer look at the trade-offs, use our Pay by Bank decision guide and payment-cost comparison.