Mobile Card Readers for Small Businesses Compared
Markets, pop-ups, fairs and mobile services all pick up as spring turns into summer, and a growing share of customers expect to tap a card or phone to pay. A mobile card reader lets you take those payments almost anywhere. This comparison looks at Square, SumUp, Stripe Terminal and Zettle by PayPal, explains what really differs between them, and gives you a scorecard and checklist to choose with confidence.
Key takeaways
- Square, SumUp, Stripe Terminal and Zettle by PayPal all offer portable card readers, but they differ in software, country availability, payout options and how they fit with the rest of your business.
- Compare the total cost of taking payments, including the reader, transaction fees and any monthly software, using current pricing pages.
- Check how each reader works with weak signal or offline, since markets and outdoor events often have poor connections.
- Think about what else you need: inventory, online sales, invoices, bookings or an existing online checkout.
If you sell at weekend markets, run a mobile service such as dog grooming or bike repair, cater events or take payments in clients' homes, a card reader is one of the most important tools you own. When it works, nobody notices. When it fails, you lose sales on the spot and maybe a customer for good. Choosing well comes down to a few practical questions, which this guide walks through one by one.
A quick note before we start: this article is general information, not financial or legal advice. Payment providers set their own fees, contract terms and account rules, which change over time and vary by country. Read the current terms carefully and talk to an accountant or adviser if you are unsure how card payments affect your bookkeeping or tax.
What a mobile card reader setup includes
A mobile card reader is only one part of the setup. When you compare options, you are really comparing a small payment system.
- The reader. A small device that accepts contactless cards and phones, and often chip and PIN cards.
- The app or point of sale software. Where you enter items, apply discounts, send receipts and see your sales.
- The payment account. The merchant account that processes payments and sends money to your bank.
- Your phone or tablet. Many readers connect to a phone by Bluetooth and use its internet connection.
- Extras. Receipt printers, charging docks, cases, barcode scanners or integrations with your accounting software.
Some setups also let you take payments directly on a compatible phone without a separate reader, sometimes called tap to pay on phone. Check whether that is available for your device and country, since it can be a handy backup.
The four readers at a glance
Here is how each option tends to be positioned. Treat these summaries as a starting point and check each provider's current features, pricing, availability and privacy policies before you decide.
Square
Square offers card readers alongside a broad point of sale app that can cover items, inventory, staff, online stores, invoices and appointments. It is popular with cafes, retailers and service businesses that want one system for several jobs. Check which features are available in your country and which require a paid plan.
SumUp
SumUp is widely used by market traders, sole traders and very small businesses, particularly in the UK and Europe. It is often chosen for a simple setup and readers that suit occasional or seasonal use. Look at its app features, payout options and whether its business account or other add-ons are relevant to you.
Stripe Terminal
Stripe Terminal brings in-person payments into the Stripe platform. It suits businesses that already take online payments through Stripe, or that have a developer building a custom checkout, because online and in-person payments can sit in one account. It may need more setup than an out-of-the-box app, so check how you would use it day to day.
Zettle by PayPal
Zettle by PayPal offers card readers and a point of sale app, connected to the PayPal ecosystem. It can appeal to businesses that already use PayPal for online sales. Check its current availability in your country, its app features and how payouts reach your bank.
Pro tip
Start from what you already use. If your online shop already runs on one provider's payments, a reader from the same provider can keep online and in-person sales in one report. Fewer systems usually means less reconciling at the end of the month.
How to compare the real cost
Card reader pricing has several layers, and providers structure them differently. Because fees change and vary by country, card type and plan, this guide does not quote numbers. Use this method with each provider's current pricing page instead.
- Estimate your monthly card sales. Use a cautious figure and a busy season figure, such as a summer market month.
- Note the transaction fees. In-person, keyed-in and online fees are often different, so note each one you will use.
- Add the hardware cost. The reader, any dock or printer, and a spare if you rely on card payments.
- Add software costs. Any monthly plan for features you actually need, such as staff accounts or inventory.
- Check payout costs and timing. Standard payouts, faster payouts and any fees for instant transfers.
- Read the account terms. Look for chargeback handling, reserves, holds and how the account can be closed.
- Total it for a year. Compare the yearly cost at both sales levels, not just the price of the reader.
Common mistake
Choosing the cheapest reader and ignoring transaction fees. The device is a one-off cost, but fees apply to every sale. For a busy trader, a small difference in fees or a monthly software plan can outweigh the price of the reader within a season. Always compare the total yearly cost.
A card reader comparison template
Copy this scorecard into a spreadsheet and add one row per provider. Fill the cost column from current pricing pages and score the rest from 1 to 5 after a test. The scores and notes below are made-up examples for a fictional weekend market stall, not a ranking.
| Provider | Yearly cost estimate | Payout timing | Offline or weak signal (1 to 5) | App features we need (1 to 5) | Fits our online sales (1 to 5) | Notes |
|---|---|---|---|---|---|---|
| Square | Your figure from current pricing | Check current terms | 4 | 5 | 4 | Inventory tools helpful for our stock |
| SumUp | Your figure from current pricing | Check current terms | 4 | 3 | 3 | Very quick setup for market days |
| Zettle by PayPal | Your figure from current pricing | Check current terms | 4 | 4 | 4 | Links with the PayPal account we already use |
Add Stripe Terminal as a fourth row if you already take online payments through Stripe. Then weight the columns that matter most for your business. A market trader may weight offline use heavily, while a shop with a busy website may weight online integration.
Hypothetical example
Imagine Tom, who sells handmade soap at weekend markets from April to October and runs a small online shop. His online orders already run through one provider, so he tests that provider's reader alongside a simpler option popular with other traders at his market. At his first spring market, the field has weak signal. He finds that one app handles queued offline payments in a way he is comfortable with, and that keeping in-person and online sales in one report saves him an hour of bookkeeping each month. He chooses that setup, buys a spare reader for busy summer weekends and keeps a battery pack in his cash box.
Offline payments, signal and reliability
Outdoor markets, festivals, basements and rural venues often have weak or no mobile signal. That makes connectivity one of the most important practical tests.
- Ask about offline mode. Some readers can store payments and process them once you reconnect. Check the limits, because there is usually a risk that a stored payment is later declined.
- Test the venue. Visit beforehand or ask other traders how signal holds up on a busy day.
- Carry a backup connection. A second phone on a different network or a portable hotspot can save a busy day.
- Charge everything. Readers, phones and battery packs, every night before an event.
- Keep a fallback. A sign with a payment link or QR code, or a cash float, keeps sales going if the reader fails.
Security, receipts and record keeping
Card readers from established providers handle the sensitive card data for you, but you still have responsibilities.
Protect your account
Turn on two-factor authentication for your payment account, use a strong unique password stored in a password manager and give staff their own logins with only the access they need. Remove access promptly when someone leaves.
Receipts and refunds
Decide how you will offer receipts: by email, text or printed. If you collect email addresses at the point of sale, remember that a receipt is not permission to send marketing. In the UK and EU, PECR and GDPR rules on consent apply to marketing emails.
Bookkeeping
Export your sales and payout reports regularly, or connect the provider to your accounting software if it integrates. Payouts usually arrive with fees already deducted, so record gross sales and fees separately to keep your books accurate. Your accountant can advise on the best approach for your setup.
Your mobile card reader checklist
- List where you take payments: markets, events, clients' homes or a shop counter
- Check which providers are available in your country
- Estimate monthly card sales for a quiet month and a busy month
- Compare transaction fees, hardware, software and payout costs from current pricing pages
- Read account terms on holds, reserves and chargebacks
- Test offline or weak signal behavior before your first event
- Turn on two-factor authentication and set up staff logins
- Plan a backup: spare reader, battery pack, payment link or cash float
- Set up a routine for exporting reports or syncing with accounting software
Frequently asked questions
Can I use more than one card reader provider?
Yes. Some businesses keep a second provider as a backup or use different providers for different channels. The trade-off is extra admin, separate reports and more accounts to secure, so make sure the benefit is worth it.
Do I need a separate business bank account?
Many providers let you receive payouts to a personal account if you are a sole trader, but a separate business account makes bookkeeping much easier. Check the provider's requirements and your bank's terms for business use.
Can I add a surcharge for card payments?
Rules on card surcharges vary by country and US state, and some places restrict or ban them for consumer payments. Check the current rules where you trade and your provider's terms before adding any surcharge.
Is taking payments on my phone without a reader a good idea?
It can be a useful backup or a simple option for low-volume sellers, where available for your device and country. A dedicated reader may still be more convenient at busy events, especially if you need chip and PIN or a quicker hand-off to customers.
Related reading
The bottom line
Square, SumUp, Stripe Terminal and Zettle by PayPal can all help a small business take card payments on the go. The best fit depends on your country, how much you sell, how often you work with weak signal and how your in-person sales connect to your online shop and bookkeeping. Compare the yearly cost with your own numbers, test the reader where you actually trade and set up a backup before your busiest weekend.
Take an hour this week to fill in the scorecard and order a reader in time to practice before your first spring event. A smooth tap at the counter is a small thing that customers notice.
