Do You Need an EPOS System or Just a Card Reader?
Decide which till, stock, reporting and staff functions you need before paying for a larger payment and EPOS package.
The short answer
Choose the smallest setup that reliably handles your sales and administration. A reader with a suitable app may be enough for simple payments. An EPOS system becomes more useful when you need functions such as item-level stock, table management or staff controls. Check the actual software plan because the hardware name alone does not tell you what is included.
In this guide
Start with the work the system must do
A card reader accepts payment. EPOS software records and manages the sale, potentially linking products, stock, orders, staff and reports. The distinction is not always a choice between two separate boxes: a reader app can include POS functions, and an all-in-one terminal can run broader till software.
Square’s inventory documentation illustrates why plan details matter: its described stock tools connect sales with stock updates and specify eligible subscriptions and devices. Do not assume that every feature advertised for a product family is in the cheapest plan.
A suitability checklist for your business
| Your requirement | What to ask the supplier to demonstrate |
|---|---|
| Simple amount-based payments | Enter an amount, accept payment, refund and issue the required receipt. |
| Products and stock | Item lookup, variations, stock counts, returns and low-stock reporting. |
| Hospitality orders | Modifiers, tables, kitchen routing and split bills where needed. |
| Several staff or locations | Permissions, separate reporting and the cost of extra users or sites. |
| Accounting and administration | Useful exports or supported integrations that match your bookkeeping process. |
For an occasional service payment, a large product catalogue may add little value. For a shop with many variations, maintaining stock in a separate spreadsheet may be a recurring burden. Use observed work in your business to decide which functions deserve a budget.
Worked example: what does the upgrade need to justify?
Fictional setup comparison. Assume card processing is identical and exclude it from both equipment-and-software subtotals.
| Cost | Reader and included app | EPOS package |
|---|---|---|
| Initial equipment and setup | £100 | £600 |
| Required software per month | £0 | £45 |
| First-year subtotal | £100 | £1,140 |
The EPOS package costs £1,040 more in the first year. At an illustrative internal time value of £18 an hour, five useful hours released each month are worth £1,080 over twelve months. That is a modelled value of capacity, not £1,080 of guaranteed cash savings.
The £45 subscription alone equals 2.5 hours at £18 an hour each month. The extra initial equipment cost still needs to be justified. If staffing expenditure does not fall, do not describe the released time as a reduction in the wage bill.
Include the less visible parts of the upgrade
- Extra tablets, printers, scanners, drawers and kitchen devices that the workflow requires.
- Setup, catalogue entry, stock import and training time.
- Paid modules, licences per site or device, and integration subscriptions.
- Ongoing support and the process for replacing failed equipment.
- Data export, cancellation and the cost of moving again later.
A function may be useful without being worth its price to your business. Our full EPOS cost guide helps assemble the financial budget; keep expected operational benefits in a separate column.
Choose using a demonstration and a measured trial
Take a short list of real tasks to a supplier demonstration. Ask staff to follow the normal sale, correction, refund and end-of-day process. Check the reports your bookkeeper needs, not only the attractive dashboard.
Use the calculator to compare actual processing, equipment and subscription costs. Measure any time benefit separately and review it after implementation. If you already have a suitable till, connecting it to a terminal may be the relevant comparison.
Common questions
Does a free POS app mean I do not need to budget for software?
Only if its included functions meet your needs. Check paid features, device restrictions, integrations and any future upgrade you already expect to require.
Should I buy a full EPOS package when starting a business?
Base the choice on required functions and realistic trading plans. Establish the cost of adding stock, staff or another location later before selecting the starting package.
Take the next step
Ready to specify a till? Browse EPOS packages, terminals and accessories. If you only need to take payments, use the provider directory to research card-reader and payment options.
Put your own figures to work.
Use the free calculator to organise your costs and keep a report. If something is unclear, you can ask for a free initial review.
No registration required. Calculator entries stay in your open browser page unless you choose to share a report in a review request.
Sources and how to use this guide
Primary references checked on 15 October 2026:
Worked examples are original fictional scenarios, not customer results, market averages or provider quotations. Unless stated otherwise, they use a consistent VAT basis and include only the costs listed. Provider prices, eligibility and terms can change. Check your written agreement before deciding.
Our guides explain costs and comparison methods. They do not rank the whole market or claim hands-on product testing. Source links are references, not a claim of partnership. Read the calculation method and limitations, or about the service.