Got a key that's worn smooth, lost your spare, or need duplicates for a team? Understanding what's involved in professional key cutting and duplication saves time, money, and frustration.
What You Actually Need to Know About Key Cutting
Key cutting isn't just grabbing a blank and grinding it down. A properly cut key requires matching the original's precise grooves and ridges—typically accurate to within 0.003 inches. When specifications are off even slightly, you'll end up with a key that binds in the lock or fails to turn at all.
Professional locksmiths and specialized key services use either mechanical key machines or laser cutting systems. Mechanical machines (the traditional route) work well for standard residential and commercial keys. Laser systems handle more complex, high-security keys and can read and replicate electronic key cards or transponder keys.
How Much Should You Expect to Pay?
Standard key duplication typically costs between $2–$8 per key at hardware stores and $5–$15 at dedicated locksmith shops. High-security keys jump significantly higher—anywhere from $15–$50 each depending on the system. Transponder or programmable car keys can reach $100–$300 because they require specialized equipment and coding.
If you need multiple copies (say, 10+ keys for office distribution), many providers offer bulk discounts. Always ask about volume pricing before placing your order.
Turnaround Times Matter
Same-day service is standard for basic keys. Most locksmiths and security shops can cut and duplicate conventional keys within 1–2 hours. High-security keys and transponder keys typically need 24–48 hours because they require specialized machinery and, in some cases, manufacturer verification.
If you're on a tight deadline, call ahead and confirm. Some shops prioritize rush orders for a small premium (usually $10–$25 extra).
Key Types and Their Specific Requirements
Standard residential keys are the easiest and cheapest to duplicate. These usually fit pin-tumbler locks found in home doors.
Commercial keys may have restricted blanks that only certain locksmiths can access, so your original locksmith is often the best source for duplicates.
High-security keys (Medeco, ASSA ABLOY, Mul-T-Lock, etc.) have patented blanks and require proof of ownership or authorization before duplication. This protects property owners from unauthorized copying.
Car keys with chips or transponders need programming after cutting. The locksmith must have access to the correct programmer for your vehicle's make and model. Some dealerships still charge 2–3 times what independent locksmiths do for the same service.
Electronic access cards require cloning equipment and data verification rather than traditional cutting.
What to Bring to the Locksmith
Arrive with your original key in hand. If it's worn or damaged, mention that—the locksmith may ask to see both the key and the lock itself to ensure an accurate cut. For high-security keys, have your proof of purchase or ownership documentation ready. If you're duplicating vehicle keys, bring your vehicle identification number (VIN) and driver's license.
For restricted keys, be prepared to provide the key holder's name or account information tied to the security system.
How to Choose a Reliable Provider
Look for locksmiths with state licensing, specific credentials (like being certified by the Associated Locksmiths of America), and clear customer reviews. Ask how long they've been in business—established providers have better access to blank inventory and equipment.
Verify they carry the specific blank you need before you visit. Some smaller shops stock only common residential and office keys.
Price comparison matters here. Mercoly helps you compare trusted key cutting and duplication providers in your area, so you can see pricing, timelines, and specialties side-by-side.
When to Replace Instead of Duplicate
If your key is cracked, heavily worn, or missing chunks, duplication may produce a faulty copy. In those cases, buying a new blank cut to your lock's specifications is often worth the extra cost. Similarly, if you've lost all copies of a high-security key, working with your original locksmith or property manager ensures you get authorized blanks.
Frequently Asked Questions
Q: Can I duplicate a key without the original? Yes, but a locksmith will need either the lock itself or access to your lock's specifications. They'll typically charge more for this service since it requires additional work to identify the correct cut pattern.
Q: Are online key duplication services legitimate? Some are, but you're trading convenience for security and accuracy—shipping an original key carries risk, and remote services can't inspect the lock itself. Local, in-person service remains the safest choice for high-security keys.
Q: What if my duplicated key doesn't work? Reputable locksmiths will remake it at no charge if the cut is their error. Always ask about guarantees before paying.
Ready to find a trusted key cutting service? Compare providers and get accurate quotes today.