Security questions often come up at the most inconvenient times. An employee leaves under difficult circumstances. A key goes missing. You move into a new office and wonder who has access. If any of these situations sound familiar, understanding what is a rekey service and when to use one can save you from a serious security risk and significant cost.
What Is a Rekey Service?
A rekey service involves changing the internal pins and springs inside an existing lock cylinder so that the old key no longer works and a new key is required to operate it. The hardware itself stays in place. Only the internal configuration changes.
This is different from replacing the entire lock. Replacing a lock means removing the existing hardware and installing a completely new unit, which is more expensive and not always necessary. Understanding what is a rekey service makes clear why it is often the faster, more cost-effective option when the goal is simply to invalidate old keys.
A licensed locksmith can typically rekey a standard door lock in a matter of minutes.
Common Reasons to Use a Rekey Service
Knowing what is a rekey service is only half the picture. The other half is recognizing when your situation actually calls for one.
Employee departure: When someone with key access leaves your business, especially on poor terms, rekeying is the fastest way to remove their access without replacing all of your hardware.
Lost or stolen keys: If a key cannot be accounted for, rekeying eliminates the risk that it ends up in the wrong hands. You cannot know who has found or copied a lost key.
New tenant or ownership: Moving into a space previously occupied by another business means unknown parties may still have working keys. Rekeying on day one is a basic and inexpensive security measure.
Key control concerns: If your team has grown and you have lost track of how many keys are out there, rekeying and reissuing a controlled set of new keys restores accountability.
Security upgrade: Rekeying can also be done as part of transitioning to a higher-security key system, such as a patented keyway that limits unauthorized duplication.
According to the Associated Locksmiths of America, lost or unaccounted-for keys are one of the most common and preventable entry points for unauthorized business access, making rekeying one of the highest-value security measures a business can take relative to its cost.
When Replacement Makes More Sense
There are situations where rekeying is not the right solution. If the lock is old, worn, or no longer functioning smoothly, replacement is the better long-term investment. The same applies if you want to upgrade to a higher-security lock model, or if you are installing an access control system that requires new hardware entirely.
Our keys and locks services cover both rekeying and full lock replacement, with guidance on which option fits your specific situation and budget.
For businesses looking to take access control a step further, our commercial services include access control systems that manage entry through key cards, fobs, or credentials rather than physical keys entirely.
Talk to CSL About Your Access Security
Now that you understand what is a rekey service and when it applies, the next step is making sure your business is actually protected. A simple rekeying job can close a security gap that has been quietly sitting open.
Contact us today to schedule your rekey service or lock assessment with the CSL team, serving the St. Louis area since 1995.
