Access control is unusual among building systems in that the purchase is the smaller half of the decision. What it costs to keep running, in money and in somebody’s time, is what determines whether it is still being maintained three years later.
The parts that recur
Credentials for new people, and the admin time to issue and revoke them. This is the cost nobody estimates and everybody pays. A building with high turnover pays it constantly.
Software or licensing, if the platform charges per door, per user, or per year. Whether this applies depends entirely on the platform, and it is worth establishing before choosing one rather than after.
Door hardware, which is mechanical and wears out. Strikes, closers, and the doors themselves are the parts that actually fail, far more often than the electronics.
Battery backup, which has a finite life and gets forgotten until the day it is needed.
The cost that is not money
Somebody has to own the system. Somebody removes the leaver’s credential on the day they leave, not the following month. Without a named owner, an access control system degrades into an expensive door opener with a permission list that no longer reflects who works there, and that is the most common end state.
Ask who that person is going to be before the system is installed. If there is no answer, the design should be simpler than whatever is being proposed.
Questions worth asking before you buy
Is there a recurring license, and what happens to the system if it lapses? Can you administer it yourself, or does routine change require a callout? Are the credentials proprietary to one supplier? If you stop working with the installer, who else can service it?
That last question is the one that separates a system you own from a system you rent, and the answer is rarely volunteered.
Why no figures appear here
Because a number in an article is a number for somebody else’s building. Door count, door condition, credential type and how much of the existing hardware survives all move it, and they move it a lot. Anyone quoting a per-door price before seeing the doors is quoting an average.
Starting smaller on purpose
A common and avoidable mistake is putting every door on the system at once because the pricing per door got better with volume. It usually did. The running cost went up with it, and so did the number of doors somebody now has to administer.
Most buildings have a small number of doors where controlled access genuinely changes something and a larger number where a good key policy would have done. Doing the first set properly and leaving the rest is a legitimate design, not a compromise.
It also leaves room to find out how the system is actually used before committing further. Six months of real use will tell you which doors people wanted and which ones nobody has opened, and that is better information than anybody can produce at design stage.
Whatever the size, ask that the system be capable of expanding without replacing the controller, because that is the difference between adding doors later and starting again.
Elite Security scopes access control from the doors themselves and will tell you which ones do not justify it. More like this in the blog, and access control is where to start when you want it priced for your building rather than in general.