A worn or damaged key doesn't automatically mean you're locked out of options—most locksmiths and key-cutting shops can still duplicate it, even if the original is bent, corroded, or partially broken. The real question is whether the damage compromises the key's profile enough to prevent an accurate copy, and what you'll actually pay for the attempt. Let's break down what's actually possible, when it works, and what to expect from local providers.
When a Damaged Key Can Still Be Duplicated
If your key is worn down but structurally intact—think shiny from years of use or slightly bent—a professional key cutter can usually read it accurately. Modern key-cutting machines use optical scanning or physical tracing to capture the exact cuts and depths, so minor surface wear doesn't stop the process.
The sweet spot for duplication is keys that are functionally worn but not deformed. A key that's been used thousands of times will show polish on the ridges, but the cuts themselves remain sharp enough to trace. A locksmith can typically scan and duplicate these in 5–10 minutes.
When Damage Makes Duplication Difficult
Things get complicated when the key is bent, snapped, or so corroded that the cuts are no longer readable. A key that's cracked along the head or has chunks missing loses information the cutter needs. Similarly, keys exposed to rust or salt corrosion may have eroded cut patterns that no longer match the lock.
In these cases, locksmiths have a workaround: they can disassemble the lock itself (if you own it), measure the internal pins directly, and cut a new key from scratch using those dimensions. This requires more skill and time, often 30–60 minutes, and costs more—typically $50–$150 depending on lock complexity.
Your Duplication Options
Option 1: Direct Optical Scan (Fastest) Bring the key to a local locksmith or hardware store. They'll place it in a key-cutting machine that photographs the cuts and depths. If the machine can read it clearly, a duplicate is cut in minutes. Cost: $2–$8 per copy for standard residential keys.
Option 2: Manual Tracing For older or worn keys, a locksmith can trace the profile by hand using the original as a template. This is slower but often more reliable for irregular wear patterns. Cost: $5–$12 per key.
Option 3: Lock Decoding If the key is too damaged to read, the locksmith removes the lock cylinder, measures the pin stack directly, and cuts a new key to specification. This works for any lock you own. Cost: $40–$150, plus potential lock reinstallation fees. Timeline: 1–2 hours.
Option 4: Impression Method A locksmith can create a blank key impression by inserting a soft blank into your lock and taking a rubbing. This only works if your lock still functions and you have access to it. Cost: $10–$25.
What to Check Before You Go
Don't waste a trip. Examine your damaged key for these details:
- Structural integrity: Is it bent, cracked, or snapped? Bent keys can sometimes be straightened, but cracked ones are candidates for lock decoding instead.
- Cut clarity: Can you see distinct, sharp cuts along the blade, or is it smooth and worn flat?
- Lock access: Do you have access to the lock it fits? If yes, decoding is always an option. If no, you're dependent on reading the key itself.
- Key type: High-security keys with additional dimples, laser cuts, or restricted blanks cost more to duplicate ($15–$50) and may require a locksmith rather than a hardware store.
Real Cost Expectations
Standard residential key: $2–$8 for optical duplication, $40–$80 for lock decoding. Commercial or high-security key: $8–$25 for duplication if readable, $80–$150 for decoding.
If you're facing multiple duplications or a series of damaged keys, get quotes from at least two locksmiths. Mercoly makes this simpler by letting you compare trusted key cutting and duplication providers in your area, read reviews, and request quotes upfront—so you know exactly what you're paying before you visit.
Frequently Asked Questions
Q: Can a locksmith duplicate a key that's bent but not broken? Yes—a bent key can usually be straightened by hand or in a vice without damage, and then scanned normally. Bring it in and ask; most locksmiths can assess it in seconds.
Q: How long does key duplication actually take? Optical scanning and cutting takes 5–10 minutes for a standard key; manual tracing adds 5–10 minutes more. Lock decoding can take 30 minutes to an hour depending on lock complexity.
Q: What if the key is so damaged the cuts aren't visible? Request lock decoding instead. The locksmith will disassemble your lock (if you own it), measure the pin configuration directly, and cut a new key from scratch—no readable original needed.
Find a trusted key cutter near you on Mercoly and get started today.