Electronic hotel locks: types and how to choose
Quick answer
For most hotels the balanced option is an encrypted RFID card lock that also supports mobile keys. The big decision is whether the lock is standalone (changes travel on the card) or online (managed in real time): the latter costs more but lets you cancel a key instantly and see the status of every door.
What is read: the credential
| Credential | Pros | Limits |
|---|---|---|
| Magnetic stripe | Very cheap cards | Wipes easily; technology being phased out |
| RFID card | Contactless, durable, wristbands too | Choose an encrypted technology |
| Phone (Bluetooth or NFC) | No handover; check-in without reception | Needs an app or wallet; not every guest will use it |
| Numeric code | Nothing to hand out | Gets shared; less suited to a staffed hotel |
In practice, RFID + mobile covers almost all guests. On the security of each card technology, see which credential to choose.
How it is managed: standalone or online
- Standalone (offline). The lock has no communication. Reception writes the room and dates to the card; the lock reads them and decides. To cancel a key early you must visit the door with a service card or issue a new one that invalidates the old.
- Update-on-card. Cards carry information back and forth each time they pass an online reader (the lift reader, say). A middle way.
- Online (wireless). The lock talks to the system by radio. You can cancel keys instantly, open remotely, see doors not properly closed and get low-battery alerts. It needs gateways in the corridors.
What to check on the doors
- Fire doors. Room doors usually are. The lock must be compatible with the door's certification; machining the leaf without respecting it can invalidate it.
- Dimensions: thickness, backset, handle-to-cylinder distance, handing.
- Existing mortice lock: sometimes reusable, sometimes not.
- Free egress: from the inside the handle always opens, with no credential.
- Privacy: "do not disturb" function and a log of staff openings.
Beyond the room
The same system should cover lifts, parking, gym or spa, meeting rooms and staff areas. Ask which wall readers the manufacturer offers and whether the guest card can activate the air conditioning.
PMS integration
Ideally the key is issued from the hotel's management software with no double entry. Confirm with both vendors (locks and PMS) that the integration exists for your version and what it costs.
Batteries, audit trail and maintenance
- Locks run on batteries: ask about expected life, low-battery warning and emergency opening.
- The opening log helps with complaints; it is personal data and must be kept only as long as needed (data protection).
- An inspection and replacement plan (maintenance).
Questions for the supplier
- Which card technology is used, and with what encryption?
- How is a lost key cancelled, and how quickly does that take effect?
- Which fire door certification is it compatible with?
- Is there an annual software fee or a per-mobile-key fee?
- What happens if the server or network goes down?
- Who provides support, at what hours, and in which languages?
If there is no reception
Apartments and unstaffed accommodation have different priorities: see self check-in for holiday rentals.
We replace locks in hotels across the Valencia region, floor by floor and without closing: hotel access control.
Frequently asked questions
Can locks be replaced without closing the hotel?
Yes, the norm is to work floor by floor or in blocks of vacant rooms, so the hotel keeps trading.
Do hotel key cards store the guest’s personal data?
Normally the card holds only an identifier, the room and the validity. Guest details are in the management system, not on the card.
This guide is for information only and is not a substitute for legal advice or for the technical design of each installation. Regulations change: always check the current text at the official source.