Best card machine for London Knowledge driver UK 2026
For green-badge London taxi drivers who have passed The Knowledge of London (320 standard routes plus 25,000 streets within 6 miles of Charing Cross) and are licensed to ply for hire anywhere in Greater London. Distinct from PCO-licensed private hire and from yellow-badge suburban-sector taxis. Same TfL card-acceptance mandate applies. This guide focuses on what works for the central-London Knowledge-driver workload.
The ranking
1. SumUp Solo
4.2 / 5Best Knowledge driver reader
Portable terminal with built-in receipt printer (Solo Lite is no-printer) · 1.69% per transaction · No contract
SumUp Solo at £99 with 1.69% rate. Dominant on the central-London Knowledge fleet because standalone 4G clears the Strand-Aldwych, Trafalgar Square, City of London and Whitehall signal blackspots without needing the driver to tether to their phone.
2. Tap to Pay on iPhone (no terminal)
4.2 / 5Best low-overhead Knowledge driver setup
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 via SumUp, Square or Stripe. £0 hardware, ideal for drivers in their first year post-Knowledge keeping fixed costs down while paying off the cab loan.
3. Verifone V200c / V400m
3.5 / 5Best meter-integrated for LEVC TX electric Knowledge
V200c countertop with built-in printer; V400m portable handheld with printer · Acquirer-dependent; blended or interchange-plus negotiated per merchant · Typically 12 to 48 months via the acquirer
Verifone V200c (Cabvision) is the standard meter-integrated terminal on the LEVC TX London Electric Vehicle Co. Knowledge fleet. Auto-prints receipt with metered fare. Higher cost but the long-tenured cab-yard standard.
4. Tide Card Reader
3.8 / 5Best for Tide Business banking Knowledge driver
Compact Bluetooth-paired reader (similar to Zettle / SumUp) · 1.5% per transaction (UK) · No contract
Tide Card Reader at £49 with 1.5% per transaction settles same-day to Tide Business banking. Cheapest dedicated hardware rate if you bank with Tide for the Knowledge-driver Ltd or sole-trader.
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 | Tap to Pay on iPhone (no terminal) | Same as the underlying acquirer | £0 hardware (you already have the iPhone) | Same as the underlying acquirer |
| #3 | Verifone V200c / V400m | Acquirer-dependent; blended or interchange-plus negotiated per merchant | Almost always rented via the acquirer; £15 to £25 per terminal per month is typical | Typically 12 to 48 months via the acquirer |
| #4 | Tide Card Reader | 1.5% per transaction (UK) | £49 hardware | No contract |
FAQs
Do all green-badge Knowledge drivers need a card machine?
Yes. TfL Conditions of Fitness Section 24 mandates card acceptance on every London Hackney carriage in service since October 2016. Green-badge (all-London Knowledge) and yellow-badge (suburban Knowledge) both included. Refusing card is a licensing offence.
Can Knowledge drivers refuse card payment for short fares?
No. TfL Conditions of Fitness explicitly prohibit refusing card for any metered fare regardless of distance or value. Some drivers historically asked for cash on short fares due to per-transaction fees making low-value fares unprofitable; this is now a licensing offence. Solution: pick a per-transaction rate (Tide at 1.5%, SumUp at 1.69%) that keeps short fares profitable.
How do Knowledge drivers handle international tourist cards?
All UK acquirers (SumUp, Square, Stripe, Adyen, Tide, Revolut, Verifone Cabvision) authorise international Visa, Mastercard and AMEX transparently. Tourist card declines are typically the tourist's home bank flagging international use, not the cab's acquirer rejecting. Suggest the tourist try their backup card.
What is the average card-acceptance rate for Knowledge drivers in 2026?
78% of London black cab fares were paid by card in calendar Q1 2026, up from 72% in 2025 and 35% pre-TfL mandate in 2015. Average per-transaction fee absorbed by driver: 1.7% to 2.0% depending on acquirer.
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: 2026-05-12.