Sesion / Blog / Mobile Key vs Plastic Keycards: The Real Cost

Mobile Key vs Plastic Keycards: The Real Cost

2026-08-294 min readBy the Sesion advisory team

Quick answer

Keycards cost little per card but carry a constant operational load of encoding, replacing and reordering. Mobile keys move that cost into lock hardware and a subscription, and only pay back when combined with online check-in that removes the desk visit. Over five years the totals are closer than either vendor suggests, so model both including installation and battery maintenance.

TL;DR

  • Keycards are cheap per unit and expensive in accumulated front desk time
  • Mobile keys shift cost to lock hardware, installation and a recurring subscription
  • The saving only appears when online check-in removes the desk visit as well
  • Batteries across every door become a scheduled maintenance cost, so include it
  • You will keep a card or code fallback either way, so budget for both

The true cost of a keycard

The card itself is inexpensive, and that is why the comparison is usually framed around it. The real cost is time: encoding at every arrival, reissuing when a card demagnetises, extending on a stay change, handling the ones that leave in guests' pockets and reordering stock.

None of that appears on an invoice. Estimate the arrivals per year and the minutes each card interaction consumes, then value it at your reception cost. That number is the honest baseline for any comparison.

Where mobile key money actually goes

Not to the app. It goes to lock hardware or retrofit modules, the installation labour across every door, the network coverage you may need to add, and the subscription. The per room monthly fee that leads the quote is typically the smallest line.

Batteries are the recurring item people forget. Across every guest room and back of house door, replacement becomes a scheduled task with an annual cost, and a door with a dead lock at midnight is an operational incident.

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The saving is conditional

A mobile key on its own does not remove the desk visit if the guest still needs a person to check a document or take a deposit. The time saving arrives when the key is combined with online check-in and identity capture, so the guest can go straight to the room.

That is why keyless projects that only replace the card rarely show a return. The three pieces have to be planned together, or you have bought hardware to solve the smallest part of the arrival.

You will run both anyway

Some guests have no compatible phone, a flat battery or no interest. Group arrivals are faster with cards. Staff need physical credentials for back of house. Every keyless hotel keeps a card or code path, so the cards do not disappear from the budget, they shrink.

Model five years with both models running in parallel at a realistic split, and include the fallback. That comparison is far less flattering to the keyless quote and far more useful for the decision.

Common questions

Do guests actually use mobile keys?

Adoption varies a lot by segment and by how the key is delivered. Frequent business travellers use them readily. Delivery matters as much as the guest: a key added to the phone's own wallet or opened from a link is used more than one behind an app download.

What happens if the guest's phone dies?

They come to reception for a card or a code, which is why the fallback must stay quick. Any keyless design that assumes a working phone will produce a queue at exactly the wrong moment.

Are keycards being phased out?

Not in the near term. Most keyless deployments run alongside cards rather than replacing them, and card technology has continued to improve. Treat this as adding an option for the guests who want it, not as an end of life decision.

Does the environmental argument hold up?

Partly. Plastic cards are waste, and many hotels have moved to recycled or wood based cards to address it. Mobile keys reduce that waste but add electronic hardware with its own footprint. It is a reasonable secondary argument and a weak primary one.

How do staff credentials work with mobile keys?

Usually through the same system with role based access, which is a genuine improvement because a departing employee is revoked instantly rather than after collecting a card. Confirm that back of house doors are included in the quote from the start.

What does a keyless project usually miss in the first quote?

Network coverage at the doors, back of house and common area locks, spare hardware, staff training, and the ongoing battery programme. Ask for a fixed price after a physical survey rather than an estimate built from a room count.