How to Rekey Commercial Locks After Employee Turnover
Table of Contents
Why Employee Turnover Creates Real Lock Security Risks
The Hidden Danger of Unreturned and Copied Keys
When to Rekey Commercial Locks After an Employee Leaves
High-Risk Departures That Require Immediate Action
What Actually Happens During Commercial Lock Rekeying
Inside the Cylinder: Pins, Tumblers, and the New Key Pattern
Your Commercial Lock Rekeying Checklist for Business Owners
Commercial Master Key System Rekeying and Restricted Key Options
Business Lock Rekey Cost: What Drives the Price
The Cost Drivers, Ranked by How Much They Move the Number
What Keeps the Price Down
Timing: How Long a Rekey Actually Takes
How to Compare Bids Without Getting Burned
Building an Employee Key Control Policy That Actually Works
Offboarding, Key Inventory, and Access Records
Rekey, Replace, or Switch to Electronic Access?
Question 1: Is the Hardware Still Sound?
Question 2: How Serious Is the Key-Control Risk?
Question 3: Do You Need Audit Trails or Time-Based Access?
The Decision, Side by Side
A Note on Mixing Approaches
Frequently Asked Questions
Last Updated: October 15, 2026
Why Employee Turnover Creates Real Lock Security Risks
Employee turnover is one of the most overlooked threats to business security. When someone leaves with a key still in their pocket, you should rekey commercial locks so your building doesn't stay exposed long after their last day.
A restaurant manager quits. A warehouse worker is let go. Nobody asks for the key back. Months later, someone uses a copy to walk in after hours.
The problem is simple: you can't track a key you never recovered. And you can't know how many copies were made.
The Hidden Danger of Unreturned and Copied Keys
Most businesses hand out keys with no record of who got what. That's a problem when people leave.
Here's what usually happens:
Keys go missing during the exit process
Employees copy keys at hardware stores before quitting
Spare keys sit in drawers that nobody tracks
A single unreturned key means your locks no longer match your access list. Rekeying commercial locks fixes that by making every old key useless.
Watch Out Never assume a returned key means you're safe. A departing employee could have copied it weeks earlier. If you didn't control the blanks, you can't control the copies.
When to Rekey Commercial Locks After an Employee Leaves
The short answer: rekey immediately after any high-risk departure, and within a week for routine turnover. Timing depends on what the person knew and could access.
High-Risk Departures That Require Immediate Action
Treat these departures as urgent:
Terminations for cause or misconduct
Anyone who held a master key
Staff with access to cash, safes, or medication storage
For routine retirements or planned exits with keys returned on time, you can schedule rekeying within the same week.
What Actually Happens During Commercial Lock Rekeying
Rekeying commercial locks means changing the internal pins inside a lock cylinder so old keys stop working and new keys take over. The hardware stays in place, the key difference from replacement, and it saves money.
Inside the Cylinder: Pins, Tumblers, and the New Key Pattern
Every pin lock cylinder holds pins and tumblers matched to a specific key pattern. The key lifts each pin to the right height; get the heights wrong and the lock won't turn.
During rekeying, a locksmith:
Removes the cylinder from the door
Takes the cylinder apart
Swaps out the internal pins for a new configuration
Reassembles and tests the cylinder
Cuts new keys to match the new pin setup
The old keys no longer lift the pins correctly. They stop working the moment the new pins go in.
That's why rekeying is often faster and more cost-effective than replacement in many cases.
Your Commercial Lock Rekeying Checklist for Business Owners
A commercial lock rekeying checklist keeps the job organized. Use this order every time someone leaves.
List every door the employee could access
Confirm which keys they held, including spares
Check for master keys and restricted keys
Pro Tip Rekey exterior doors and any door guarding cash, records, or medication first. If your locksmith can only do part of the job today, start where a break-in would hurt most.
Commercial Master Key System Rekeying and Restricted Key Options
A commercial master key system rekeying job is more complex than a single-lock rekey. Master key setups use a hierarchy where one key opens many doors and each employee key opens only assigned areas, so rekeying means rebuilding that hierarchy so the departed employee's key no longer fits anywhere.
Restricted key systems go further, using patented key blanks only your locksmith can copy, stopping employees from duplicating keys at a hardware store.
Option | Stops Key Copying | Best For | Rekey Complexity |
Standard cylinder | No | Low-turnover offices | Low |
Master key system | No | Multi-door buildings | Medium |
Restricted key system | Yes | High-security sites | High |
Electronic access | Yes | Regulated facilities | Highest |
For businesses with real key-control problems, restricted keys are usually worth the upgrade: they make key duplication something only you can authorize.
Business Lock Rekey Cost: What Drives the Price
Business lock rekey cost depends on several factors, not a flat rate. Most commercial locksmiths price per cylinder plus a service or trip charge, then add for new keys, after-hours scheduling, and any hardware replaced. Understanding the levers lets you compare bids apples to apples.
The Cost Drivers, Ranked by How Much They Move the Number
Cylinder count. The single biggest driver. Every cylinder rekeyed is labor plus a pin kit charge, a five-door office and a forty-door warehouse are not the same job even at an identical hourly rate.
Lock type. Standard pin-tumbler cylinders are cheapest and fastest to rekey. High-security and restricted-key cylinders take longer, may require proprietary pins or blanks, and can need manufacturer authorization before keys are cut.
Master key system complexity. A single-key-per-door building is straightforward. A hierarchy with grand masters, sub-masters, and change keys must be rebuilt so the departed employee's key no longer fits anywhere, skilled work, priced accordingly.
What Keeps the Price Down
Rekeying during normal business hours instead of after close
Batching every affected lock into one visit so you pay one trip charge
Keeping your existing hardware instead of replacing it
Key Takeaway Rekeying almost always costs less than replacing hardware. You pay for labor and new keys, not new locks. The exception is old or failing hardware that needs replacing anyway, or a lock grade that no longer matches what the door protects.
Timing: How Long a Rekey Actually Takes
A single standard commercial cylinder can be rekeyed in minutes once it is off the door. On-site time is dominated by removing and reinstalling cylinders, testing every key, and walking the building to confirm nothing was missed.
If you need the work done before a specific date, say so when you book. Restricted-key systems have longer lead times because new keys may be ordered from the manufacturer rather than cut on site.
How to Compare Bids Without Getting Burned
Ask every locksmith for the same three things in writing: a per-cylinder price, a per-key price, and the trip or service charge. Then ask what is excluded, common exclusions are after-hours premiums, replacement cylinders if one fails during removal, and new keys beyond the quoted count.
Also confirm the locksmith will document the work. A written record of which cylinders were rekeyed, the date, and who received new keys proves your access control is clean if anything goes wrong.
Building an Employee Key Control Policy That Actually Works
An employee key control policy is a written set of rules for who gets keys, how they're tracked, and what happens when someone leaves. Without one, every departure becomes a scramble.
A policy that works has four parts:
A key inventory that lists every key and who holds it
A sign-out process with signatures and dates
A clear offboarding step for key return
Offboarding, Key Inventory, and Access Records
Offboarding is where most policies fall apart, keys get forgotten in the rush to close out accounts and equipment. Make key return part of the same checklist as laptop return and badge collection. No exceptions.
Keep an access record that shows:
Who holds each key
Which doors that key opens
When the key was issued
Review the record every quarter. If a name on the list no longer works for you, that's a rekey you missed.
Pro Tip Photograph or scan every key at issue and label it with a number. When a key goes missing, you'll know exactly which one to rekey instead of guessing.
Rekey, Replace, or Switch to Electronic Access?
Rekeying is the right call for most turnover situations, but not always. The wrong choice wastes money or leaves a gap open. Use these three questions, in order.
Question 1: Is the Hardware Still Sound?
Rekeying only makes sense if the lock itself is in good working condition. Inspect each cylinder first.
Replace instead of rekey when you see:
A cylinder that sticks, binds, or needs jiggling to turn
Visible wear, corrosion, or damage to the cylinder or housing
A lock grade that is lower than what the door protects (a light-duty residential-grade cylinder on an exterior commercial door, for example)
If the hardware is sound, rekeying preserves it and you pay only for labor and new keys. If it is not, rekeying a failing lock just postpones a replacement you'll pay for twice.
Question 2: How Serious Is the Key-Control Risk?
This is where most businesses under-think the decision. Ask how many copies of the departed employee's key could exist and whether you ever controlled the blanks.
Low risk: A single key, returned on time, standard blank, no master key access. Rekey the affected cylinders and move on.
Medium risk: The employee held a master key, had access to multiple areas, or you cannot confirm all copies were returned. Rekey the full hierarchy the key belonged to, not just the door they used most.
High risk: Keys were lost, stolen, or copied; the employee had access to cash, records, or medication storage; or you have no key inventory at all. Rekey everything the key could open, and seriously consider moving to restricted keys or electronic access so the next departure cannot repeat the problem.
Watch Out If you cannot answer "how many copies exist and who has them," treat the risk as high. That uncertainty is the risk.
Question 3: Do You Need Audit Trails or Time-Based Access?
Electronic access is not just a security upgrade. It changes what you can prove and control.
Choose electronic access when you need:
A record of who entered which door and when
Access that expires automatically on an employee's last day
The ability to lock out a single credential without touching hardware
Electronic access removes the physical key problem entirely, no keys to lose, copy, or forget to collect. The trade-off is higher upfront cost, dependency on power and network reliability, and the need for someone to manage the system.
The Decision, Side by Side
Situation | Best Choice | Why |
Sound hardware, low key-control risk | Rekey | Cheapest and fastest; old keys stop working |
Sound hardware, high key-control risk | Rekey plus restricted keys | Rebuilds the hierarchy and blocks future copying |
Failing or under-graded hardware | Replace | Rekeying a bad lock wastes the labor |
Need audit trails or time-based access | Electronic access | Removes physical keys and adds accountability |
Frequent turnover, many doors | Electronic access or restricted keys | Reduces repeat rekeying cost over time |
A Note on Mixing Approaches
You don't have to pick one path for the whole building. A common pattern is to rekey standard interior doors, upgrade exterior and sensitive-area doors to restricted cylinders, and put electronic access on the one or two doors where audit trails actually matter, keeping cost proportionate to risk on each door.
The right choice comes down to how much control you need, how often staff changes, and what the door protects. When in doubt, rekey the doors guarding your highest-value assets first and plan the rest from there.
Frequently Asked Questions
How much does it cost to rekey a commercial lock?
Business lock rekey cost depends on the number of locks, cylinder types, and whether a master key system is involved. A single commercial lock costs less than a full suite, and after-hours or emergency service adds to the total. Master key rekeying takes more time because every cylinder must be repinned to the new hierarchy. Bay Safe and Lock provides written estimates based on your door count and hardware, so request a quote before work begins.
How long does commercial lock rekeying take?
A single lock cylinder can be rekeyed efficiently. An office suite with several doors may take a few hours, and a master key system across a larger building can stretch into a full day. Scheduling the work in one visit keeps disruption low. Ask your locksmith to confirm timing once they know your door count and cylinder types.
Can a master key system be rekeyed after an employee leaves?
Yes. Commercial master key system rekeying repins each cylinder to a new pin configuration while preserving the access levels assigned to managers, staff, and restricted areas. Every master key and sub-master key is cut to the new pattern, and the old keys stop working. If the system uses restricted key blanks, the locksmith controls duplication, which prevents unauthorized copies from being made.
What should a business do if a former employee does not return a key?
Treat the missing key as a security concern and schedule rekeying right away, especially if the key opened entry points, storage, or cash-handling areas. Document the unreturned key in your access review, note the employee's departure date, and update your key inventory. If the key was a restricted blank, contact the locksmith who issued it. Rekeying commercial locks removes the risk that the old key still opens your doors.
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