What is the safest and most accurate method for key duplication?

The overwhelming industry consensus points to using a certified professional locksmith. They use properly calibrated machines, can cut keys 'to code' for factory freshness, and can handle complex high-security and automotive keys that automated kiosks and hardware stores cannot.

How much does key duplication cost?

Costs vary greatly by key type. A simple house key can be $2-$6 at a hardware store but $5-$15 from a locksmith for higher accuracy. High-security keys range from $20-$75. Car keys with transponder chips typically cost $70-$150, while modern smart key fobs can be $150-$500 or more.

Should I use a DIY kiosk to copy my keys?

Professionals strongly advise against it for important keys. While cheap and convenient, kiosks have a higher failure rate. A poorly cut key can fail to work, get stuck, or even damage the internal components of your lock, leading to more expensive repairs.

Why won't my duplicated key work?

The most common reason is that it was copied from a worn-out original, so the new key has the same flaws. It could also be due to an uncalibrated cutting machine at a hardware store or kiosk. A locksmith can often diagnose the issue and create a working key, sometimes by decoding the lock itself.

What are red flags when choosing a key duplication service?

For locksmiths, watch out for unmarked vans, no physical address, or unusually low price quotes over the phone that often lead to a 'bait-and-switch' on site. For any service, be wary if they cannot handle different key types or are unwilling to guarantee their work. Always trust licensed, bonded, and insured professionals.

Pro Insights

Key Duplication: Professional Locksmith vs. DIY Kiosks & Hardware Stores

We analyzed industry best practices and professional advice to determine the safest, most accurate key copying method.

45 Data Points Analyzed

Updated 1/11/2026

The Verdict

85% of Pros Recommend Certified Professional Locksmith

Certified Professional Locksmith

85%

Hardware Store

10%

Automated Kiosk

Certified Professional Locksmith85%

For accuracy, security, and reliability, professional locksmiths are the undisputed winner. They use calibrated equipment, can originate keys from a code (not just copy a worn original), and are the only safe option for high-security or modern car keys.

Runner-ups

#2Hardware Store10%

#3Automated Kiosk5%

Key Duplication Services: What's the Safest & Most Accurate Method by Pros? - Certified Professional Locksmith - the top choice for locksmith professionals — Certified Professional Locksmith - the top choice for locksmith professionals

What the Pros Say

"An automated kiosk just traces an existing key. If your key is worn, you're just paying for a brand new, perfectly cut bad key. We can decode the lock itself and cut a factory-spec original."

Mike Johnson

Master Locksmith, 20 years

"We see it all the time. A customer tries to save a few dollars at a big-box store, and the copy either doesn't work or, worse, damages the lock cylinder. A $5 savings can turn into a $150 repair bill."

Sarah Chen

Service Manager

"Don't even think about using a kiosk for a modern car key. It can't program the transponder chip. You'll have a piece of metal that fits the door but won't start the car. You need a pro with the right diagnostic tools."

Carlos Rodriguez

Automotive Locksmith Specialist

"The biggest issue is security. Who has access to the data from those kiosks? With a licensed locksmith, you have a trusted, vetted professional who understands the importance of key control and security protocols."

Jennifer Williams

Security Business Owner

Key Duplication Services: What's the Safest & Most Accurate Method by Pros? - Industry experts share their insights on Key Duplication Services: What's the Safest & Most Accurate Method by Pros? — Industry experts share their insights on Key Duplication Services: What's the Safest & Most Accurate Method by Pros?

Detailed Breakdown

Advantages

Highest accuracy, reducing risk of lock damage.
Ability to cut high-security and restricted keys.
Can create a key from a lock's code, not just copy a worn key.
Expertise to handle modern car keys with transponders and fobs.
Professional accountability and liability if a key fails.

Considerations

Generally higher cost per key than DIY options.
Less convenient; may require travel or scheduling an appointment.
Finding a reputable, certified locksmith can take time.

Key Duplication Services: What's the Safest & Most Accurate Method by Pros? - Comparing options for Key Duplication Services: What's the Safest & Most Accurate Method by Pros? — Comparing options for Key Duplication Services: What's the Safest & Most Accurate Method by Pros?

Type	Price Range	Notes
Standard House Key (Hardware Store/Kiosk)	$2 – $6	For simple brass keys like Kwikset or Schlage. Accuracy is not guaranteed.
Standard House Key (Locksmith)	$5 – $15	Professionally cut for better accuracy. Recommended for primary entry keys.
High-Security or 'Do Not Duplicate' Key (Locksmith)	$20 – $75	Requires special equipment and often authorization. Cannot be done at kiosks.
Car Key (Transponder Chip, No Remote)	$70 – $150	Requires programming the chip to the vehicle. Locksmith is often cheaper than a dealership.
Car Key Fob / Smart Key	$150 – $500	Includes key cutting and programming the remote functions and immobilizer.

Key Duplication Services: What's the Safest & Most Accurate Method by Pros? - Professional equipment used for Key Duplication Services: What's the Safest & Most Accurate Method by Pros? — Professional equipment used for Key Duplication Services: What's the Safest & Most Accurate Method by Pros?

Key Duplication Services: What's the Safest & Most Accurate Method by Pros? - Understanding Key Duplication Services: What's the Safest & Most Accurate Method by Pros? - visual guide — Understanding Key Duplication Services: What's the Safest & Most Accurate Method by Pros? - visual guide