Best card machine for low monthly volume UK 2026
For UK merchants doing under £5,000 monthly card volume. Sole traders, market stalls, weekend market sellers, occasional traders, side-businesses, just-launched startups. The right card machine is no-monthly-fee, no-contract, pay-as-you-go, low hardware cost. Anything else over-charges you.
The ranking
1. SumUp Solo
4.2 / 5Best overall low-volume
Portable terminal with built-in receipt printer (Solo Lite is no-printer) · 1.69% per transaction · No contract
SumUp Solo at £99 to £149 with 1.69% per transaction wins on low-volume because there is no monthly fee. At £2,000 monthly volume the blended cost is £34/month total. Compare to a Worldpay contract at 0.6% + £20 monthly fee, which would cost £32/month at the same volume but lock you into 36 months.
2. Zettle Reader 2
4.0 / 5Best entry-level low-volume
Compact card reader (pairs with phone or tablet) · 1.75% per transaction · No contract
Zettle Reader 2 at £59 to £79 hardware with 1.75% per transaction. Cheapest UK upfront cost. No monthly fee, no contract. Best fit for occasional traders, weekend markets, just-launched testers who do not know their volume yet.
3. Tap to Pay on iPhone (no terminal)
4.2 / 5Best zero-hardware low-volume
iPhone XS or later running iOS 16.4+, no separate terminal · Same as the underlying acquirer · Same as the underlying acquirer
Tap to Pay on iPhone removes the hardware cost entirely. Zero upfront, no monthly fee, pick a no-contract acquirer. Best fit for low-volume mobile traders who already own a recent iPhone.
4. Square Terminal
4.1 / 5Best all-in-one low-volume
All-in-one countertop terminal with receipt printer · 1.75% per transaction (UK) · No contract
Square Terminal at £149 with 1.75% per transaction. No monthly fee, built-in printer, full POS. Worth the higher hardware cost if you want one device that runs the whole counter.
Quick comparison
Headline rate, hardware cost, contract and form factor at a glance.
| Rank | Terminal | Rate | Hardware | Contract |
|---|---|---|---|---|
| #1 | SumUp Solo | 1.69% per transaction | £99 to £149 hardware | No contract |
| #2 | Zettle Reader 2 | 1.75% per transaction | £59 to £79 | No contract |
| #3 | Tap to Pay on iPhone (no terminal) | Same as the underlying acquirer | £0 hardware (you already have the iPhone) | Same as the underlying acquirer |
| #4 | Square Terminal | 1.75% per transaction (UK) | £149 to £199 | No contract |
FAQs
What is the best card machine for a low-volume UK business?
SumUp Solo at £99 to £149 with 1.69% per transaction and no monthly fee is the strongest low-volume pick in 2026. For occasional or seasonal traders below £1,000 monthly volume, Zettle Reader 2 at £59 to £79 is cheaper upfront. Tap to Pay on iPhone removes the hardware cost entirely if you own a compatible iPhone.
Should a low-volume merchant pay a monthly fee for a card machine?
No. At sub-£5,000 monthly card volume, the monthly fee almost always over-charges. A £20/month fee plus a "good" 0.5% rate costs more in total than 1.69% on no monthly fee. Pay-as-you-go pricing wins until volume justifies the fixed cost.
Can I move to a contract acquirer if my volume grows?
Yes. MerchantHQ switches you to a contract acquirer (Dojo, Worldpay, Tyl) once your monthly card volume crosses about £10,000 to £15,000. We manage the cutover with zero trading downtime via /switching-help/. The right card machine changes with volume.
Are no-monthly-fee card machines slower or worse?
No. SumUp Solo, Square Terminal, Zettle Reader 2 and Tap to Pay on iPhone all run on the same Visa and Mastercard rails as the contract products. Speed of authorisation is identical. The trade-off is per-transaction rate, not technical reliability.
Methodology
Rankings are based on direct hands-on testing, published rates, settlement timing, contract terms, and acquirer reliability. We do not accept payment for ranking position. See our full methodology and editorial policy.
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Open quote form →Reviewed by Oliver Mackman, Director. Last reviewed: 2026-05-11.