Do NFC tags work on metal counters?
3 September 2026 · 3 min read
Put a plain NFC tag flat on a steel counter and most phones will read nothing at all. It is not a faulty tag — it is physics, and it is easy to work around.
Why metal breaks the read
An NFC tag is an antenna tuned to 13.56MHz. A metal surface right behind it absorbs the field into eddy currents and shifts the tuning, so the phone never gets a clean signal. Stainless counters, metal till surrounds and foil-backed laminates all do it.
The two fixes
Distance or ferrite. A few millimetres of air, plastic or felt between the chip and the metal is usually enough. A ferrite layer behind the tag works in a smaller space by redirecting the field away from the metal.
Our stands solve it by construction: the chip sits inside an acrylic body with a felt base, so there is never metal directly behind the antenna.
What about phone cases and card holders?
Same problem from the other side. A case with a metal plate for a magnetic mount, or a wallet case holding bank cards, can stop a phone reading anything. Ask the customer to try the top of the phone, or hand them the QR code instead.
Questions, answered
- Can I stick a tag on a metal A-board?
- Only with an on-metal tag, which has a ferrite backing. A standard sticker will not read.
- Does glass or wood matter?
- No. Non-metallic surfaces are invisible to the field, which is why stands work on any normal counter.
