What Is Lock Rekeying?
Security is a top priority for homes and businesses. But what if you could enhance security without replacing your entire lock? That’s where rekeying comes in. It’s a cost-effective way to change who has access without swapping out the whole lock mechanism. But what exactly is rekeying, and when should you consider it? Let’s break it down practically and maybe even have a little fun.

What Is the Purpose of Rekeying a Lock?
Think of rekeying as changing the secret handshake of your lock. Your current key works today, but after rekeying, it won’t. Instead, you’ll have a new key that fits the same lock. This process adjusts the lock’s internal pins, ensuring old keys no longer function.
Why Would You Want to Rekey a Lock?
- Moving into a new home or business – You don’t know who still has copies of the old key.
- Lost or stolen keys – If your keys are missing, rekeying prevents unauthorized access.
- Tenant or employee turnover – If someone moves out or leaves the company, it’s a smart security move.
- Multiple keys for different locks – Rekeying can make several locks work with a single key for convenience.
- Increased security – If you’re unsure who has a copy, rekeying eliminates that uncertainty.
Rekeying is all about control. You decide who has access without completely replacing the lock hardware.
Is It Cheaper to Rekey or Replace Locks?
The short answer? Rekeying is usually the more budget-friendly option. Swapping out an entire lock means buying new hardware, which costs more than adjusting the pins inside your current lock.
When Is Rekeying the Better Option?
- Your locks are in good condition and don’t need replacing.
- You need a quick and affordable security update.
- You have multiple locks and want to simplify key usage.
When Should You Replace a Lock Instead?
- The lock is damaged, outdated, or worn out.
- You want a different style or higher-security lock.
- You suspect someone tried to tamper with the lock.
In most cases, rekeying gets the job done for less money. But if your lock is on its last legs, replacing it might be the smarter long-term choice.

Can You Rekey a Lock If You Lost the Key?
Losing a key is frustrating. But does that mean you’re stuck replacing the entire lock? Not necessarily.
Rekeying is still possible, but it takes a little extra work. Normally, locksmiths use the existing key to rekey a lock. Without it, they have to pick the lock or disassemble it to access the internal components. This adds time and cost to the process.
What Are Your Options if You Lost the Key?
- Call a locksmith – They can rekey it without the original key, though it will take extra effort.
- Replace the lock – If rekeying isn’t an option or the lock is old, this might be the better route.
Losing a key doesn’t always mean starting from scratch. But expect a slightly more complex (and pricier) rekeying process if your original key is missing.
How Expensive Is It to Rekey Locks?
The cost of rekeying depends on a few factors:
- Number of locks – More locks mean a higher overall cost.
- Type of lock – Standard locks are easier (and cheaper) to rekey than high-security models.
- Availability of the current key – If you don’t have it, expect to pay more for the extra labor.
- Service fees – Locksmiths may charge a trip fee in addition to the rekeying service.
General Cost Estimates
- DIY Rekeying Kit – $15–$30 (if you’re comfortable doing it yourself)
- Professional Rekeying (per lock) – $20–$60
- Full Lock Replacement – $50–$300 (including hardware and labor)
If you need multiple locks rekeyed, some locksmiths offer discounts. If you’re already calling a locksmith for another service, adding rekeying to the job can be a cost-effective choice.
Additional Rekeying Considerations
Can You Rekey a Lock Yourself?
Yes, if you have a rekeying kit designed for your lock brand. But it takes patience, a steady hand, and a bit of know-how. If security is a priority, it’s often worth calling a professional.
Does Rekeying Make a Lock Less Secure?
No, rekeying doesn’t weaken the lock. It simply changes the key that works with it. If anything, it improves security by eliminating old key access.
How Long Does It Take to Rekey a Lock?
A professional locksmith can rekey a standard lock in 10–15 minutes. If you have multiple locks or complex hardware, it may take longer.
Final Thoughts: When Should You Rekey?
Rekeying is a smart, cost-effective security upgrade. If you’ve moved, lost a key, or just want better control over who has access, it’s a great option. It’s quicker and cheaper than replacing a lock entirely, as long as the lock itself is in good condition.
Need a locksmith? Call one today and keep your home or business secure without breaking the bank!
Sometimes it’s just a better option to rekey an existing lock than it is to buy a new one. And let’s be honest, it’s usually a lot cheaper too! Below we take a look at how a locksmith rekeys a lock.