Rekey After an Employee Leaves: A Business Owner's Guide
Yes, rekey when an employee leaves, and do it fast if the exit was not friendly or if that person held keys you cannot fully account for. Collecting the key you handed out does not remove the copies you never knew about. Rekeying changes the internal pins of the lock so every old key stops working, and the locks stay in place.
This guide shows you when rekeying is necessary, which doors to do first, what to do the same day, and how to build a key system so the next departure is a short job. We serve businesses and property managers in Homestead, Cutler Bay and across Miami-Dade County.
TL;DR
Rekey the same day or the next day after a firing, a dispute, or any exit where a key was not returned.
Returning one key proves nothing about copies. Rekeying is the only way to make every old key useless.
Prioritize exterior doors, cash rooms, server closets and storage with stock or records. Low-risk interior doors can wait.
Close digital access at the same time: alarm codes, door codes, key cards, fobs and passwords.
Keep a key log and issue the fewest keys possible, so the next rekey is quick and cheap.
Table of Contents
Why collecting the key is not enough
When an employee hands back a key, you know one key is accounted for. You do not know about the copy made at a hardware store kiosk, the key a coworker borrowed, or the one that sat in a car for two years. Copying a standard key takes a minute and costs very little. Nothing in the key itself tells you how many exist.
That is why a policy beats judgment. Deciding that a former employee “would never” use a key is a guess. A written rule, for example “any key holder who leaves triggers a lock review,” removes the guess and the awkward conversation about whether to trust someone.
Offboarding is also not only an HR task. The U.S. Interagency Security Committee’s guide on adverse and involuntary employee separations says removal of physical access to the facility and logical access to systems should happen closely together. A rekeyed door with a still-active alarm code is half a fix.
When you should rekey
Not every departure needs a locksmith visit. Use the exit type and the access the person had.
Situation | Rekey? | Timing |
Fired, laid off in conflict, or left angry | Yes | Same day or next morning |
Key not returned or “lost” | Yes | Same day |
Quit on good terms, returned all keys, held few keys | Judgment call, rekey the main doors | Within a week |
Held a master key or keys to the cash room, server closet or inventory | Yes, and review the whole system | Before the next business day |
Part-time or seasonal worker with a single interior key, returned | Usually no, update your log | Immediately |
Manager who knew alarm and door codes | Yes, plus change every code | Same day |
If you are unsure, ask what the person could reach alone, after hours, without anyone noticing. If the answer includes money, inventory, customer records or equipment, rekey.
Which doors to rekey first
You do not have to treat every door equally. Map your doors into three tiers before you call anyone:
High consequence: exterior doors, cash or safe rooms, server and network closets, inventory storage, file rooms with customer or employee records.
Medium consequence: back offices, loading doors, supply rooms, shared break areas with valuables.
Low consequence: interior supply closets and doors with nothing worth taking.
Rekey tier one right away. Do tier two within days. For tier three, collecting keys and updating your log may be enough. This saves money without leaving the doors that matter exposed.
If you manage a property with many tenants or staff, the cost of rekeying one door at a time adds up fast. A master key system can fix that, and we explain how in our master key system guide for Miami-Dade property managers.
Rekey or replace the lock
Most of the time, rekeying is the right answer. The hardware is working, you only need a new key combination. Replace the lock when it is worn, damaged, broken into, or too old to be trusted, or when you want to upgrade to a high-security or electronic model.
For a plain explanation of the trade-off, this guide on rekeying versus replacing locks covers the decision from the homeowner side, and the logic carries over to a small office. Our own take, with cost ranges for homes, is in rekey vs replace locks for homeowners.
A quick test: if a lock turns smoothly, latches well and has no damage, rekey it. If a deadbolt sticks, the door frame is loose, or the lock has no security rating you can name, replace it while the locksmith is there.
What to do the same day an employee leaves
A tidy exit takes about an hour of coordination. Work through this list:
Collect everything: keys, fobs, key cards, garage openers, company phones and tablets. Write down what came back and what did not.
Check your key log: compare what the person was issued with what they returned. If you have no log, assume they could have had access to any door they used.
Call a locksmith for tier one doors if the exit was hostile or any key is missing.
Change alarm and keypad codes, and deactivate the person’s code and any shared codes they knew.
Disable cards and fobs in your access control system.
Reset digital access: email, shared passwords, cloud accounts, the point-of-sale system and any vendor portals.
Tell the team: let staff know the locks changed and who holds the new keys, so no one is surprised at opening time.
Document it: record the date, doors rekeyed, who got new keys and who authorized it. If an incident happens later, this record helps with your insurer and any report.
For a longer, step-by-step version with return deadlines, see our employee key return checklist for facility managers.
Do not forget codes, cards and smart locks
A lot of Miami-Dade businesses now run keypads, smart locks and card readers next to traditional keys. The same rule applies: if the person knew the code, the code is compromised. Shared codes are the weak point, because one departure forces a change for everyone.
Our guidance on how often to change door codes lists the triggers for a reset, and an employee leaving is one of them. If you have a smart lock at the office or a rental, see how to rekey a smart lock. If you are weighing a move to individual credentials, our small business access control guide walks through the options.
Individual codes and cards are easier to cancel than shared ones. When you disable one credential, nobody else is affected, and the access log shows who entered and when.
Build a key system that makes the next exit easy
The cheapest rekey is the one you can limit to two doors. That depends on what you did before anyone left.
Keep a key log. Record who holds which key, the date issued and the date returned. Keep it current.
Issue the minimum. The UK’s National Protective Security Authority advises that only the minimum number of keys should be issued, with an up-to-date record of who holds them. It is British guidance, but the principle holds anywhere.
Stamp keys with codes, not door names. A key marked “Cash Room” tells a finder exactly where to go. A code only means something to you.
Use restricted key blanks for important doors, so a copy cannot be cut at a random kiosk. Ask us which systems fit your locks.
Check copies. When you do need duplicates, accuracy matters. We cover what to look for in our piece on key duplication accuracy.
Audit once a year. Count the keys, compare to the log, and see what is missing.
If your doors are a mix of types, our commercial door lock types guide helps you see which ones can be rekeyed, which are better replaced, and which suit a master key system.
Rental units and moves are a different case
This article is about staff departures. If the keys are leaving with a tenant who moved out, the timing and the legal position are different, since you should hold lawful possession before you change anything. Our guide to rekeying after a move, with 48-hour security steps for owners and landlords, covers that.
Our perspective
We see the same pattern again and again. A business owner calls after something has gone missing, or after a bad exit, and says they thought the key had been returned. In our experience the problem is rarely one key. It is that nobody knows how many keys exist, who has them, or which doors they open.
Our advice is to stop treating a rekey as an accusation. It is routine maintenance, like changing a password when someone leaves. When you do it every time a key holder departs, it is cheap, quick and nobody takes it personally. When you do it only after a conflict, it feels like a crisis and gets done in a panic.
We recommend three habits. First, write down who has keys. Second, rank your doors so you know the order of work before you need it. Third, have a locksmith you already know, one who answers at night and speaks both English and Spanish, because a bad exit rarely happens at 10 a.m. on a Tuesday.
— Julio Borroto
Rekeying with Progressive Locksmith
We handle commercial rekeying, lock changes, deadbolt and door lock installation, electronic and digital locks, and access control systems for businesses and property managers around Homestead, Cutler Bay and Miami-Dade County. We are available 24/7, so an after-hours firing does not have to wait until morning, and we state pricing upfront before work starts. Our team is licensed and insured.
See the full list on our locksmith services page, or contact us through the Progressive Locksmith home page to book a visit for your high-priority doors.
FAQ
How soon should I rekey after an employee is fired?
The same day, or before the next business day, is the safest approach. The employee may hold copies you do not know about, and the first hours after a termination are when the risk is highest. Start with exterior doors and any room holding cash, inventory or records.
Is rekeying enough, or do I need to replace the locks?
Usually rekeying is enough. It changes the internal pins so old keys no longer work, and you keep your existing hardware. Replace a lock only if it is damaged, worn, or not secure enough for the door it protects.
What if the employee only quit on good terms?
If they returned all keys and held access to only a few low-risk doors, you may not need a full rekey. Update your key log and change any shared codes. If they had a master key, cash room access or you cannot confirm how many copies exist, rekey anyway.
Do I need to rekey if my business uses key cards or keypads?
You do not need to rekey for cards, but you must disable the person’s card or fob and change any code they knew. Many offices use both cards and mechanical keys on some doors, so check every entry point, including back and side doors.
Can I rekey the doors myself?
Some people do it with a kit, but commercial cylinders, master key systems and high-security locks are easy to get wrong, and a mistake can leave a door that locks wrong or not at all. A locksmith also gives you a record of what was changed. For a business, we recommend a professional.
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