Most homeowners underestimate how often they'll need spare keys—until they're locked out or tired of searching for the one copy that works. Key duplication is one of the most affordable locksmith services, but pricing varies widely depending on your key type, locksmith location, and local demand. Understanding what you should pay helps you avoid overcharges and make smart decisions about duplicating keys for family members, renters, or emergency backups.
Standard Key Duplication Costs
Basic residential key duplication typically runs $2 to $10 per key at a local locksmith shop. This covers traditional pin-tumbler keys for common residential locks—the kind most homeowners encounter on front doors, interior rooms, and simple deadbolts. The wider price range usually reflects geographic differences; rural locksmiths often charge less than those in metropolitan areas, while shops in high-cost cities like San Francisco or New York may push toward the upper end.
If you're duplicating multiple keys at once, some locksmiths offer bundle discounts. Duplicating 3–5 keys for the same lock might drop the per-key cost to $1.50–$3 each. Always ask about volume pricing before you pay; it's a legitimate negotiation point.
Specialty Key Types Cost More
Your actual bill depends entirely on what kind of key you're duplicating. Here's what to expect:
- Standard pin-tumbler keys: $2–$6 (most residential doors)
- Master keys or restricted keyways: $8–$20 (keys with special cuts, often used for rental properties)
- Tubular keys: $5–$12 (some deadbolts and cabinet locks)
- High-security or patented keys: $15–$40 (Medeco, Schlage Primus, or similar; require licensed locksmiths)
- Smart lock backup keys: $10–$25 (if your smart lock has a mechanical override)
- Key blanks you provide: $3–$8 (if you buy your own blank from a hardware store, many locksmiths will cut it for less)
Specialty keys cost more because they require precision equipment, more skilled cutting, and sometimes licensing agreements. If your locksmith says they can't duplicate a high-security key without proof of ownership, that's a sign they're reputable—high-security locks are designed to prevent unauthorized duplication.
When to Use a Locksmith vs. a Hardware Store
Hardware stores and big-box retailers like Home Depot often advertise key duplication for $0.99–$3 per key. The trade-off is convenience and speed, but quality control varies. Most hardware stores use basic automated key-cutting machines that work fine for standard residential keys but may struggle with worn originals or keys with complex cuts.
Locksmiths, by contrast, hand-cut or use precision equipment, inspect your key and blank for fit, and test the copy before handing it over. If your original key is slightly worn or your lock is finicky, a locksmith-made copy is worth the extra cost. For high-security or master keys, skip the hardware store entirely—you need a licensed locksmith.
Additional Costs and Considerations
Service call minimums: If you're calling a locksmith to your home instead of visiting their shop, expect a $50–$100 service call fee on top of key duplication costs. This makes sense for emergency lockouts, but for routine duplication, visiting their storefront is cheaper.
Turnaround time: Most locksmiths duplicate keys on the spot (5–10 minutes). If you need keys duplicated quickly but can't visit in person, some locksmiths offer same-day mail-in services for $15–$30 extra.
Key identification: If you're unsure which lock a key opens or need duplicates for keys without labels, tell the locksmith upfront. They may charge $5–$15 to identify the lock type before cutting.
How to Get Fair Pricing
Call 2–3 local locksmiths and describe your key type and situation. Ask for a quote over the phone; reputable locksmiths will give you a ballpark figure without a service call. Compare Mercoly's locksmith provider directory to find trusted residential locksmiths in your area with verified customer reviews and transparent pricing.
Always confirm whether the quote includes the blank key cost, any service charges, and whether they offer discounts for multiple keys. Ask if they stand behind their work with a guarantee.
Frequently Asked Questions
Q: Can I duplicate a key without the original lock present? Yes, if you have the original key, a locksmith can duplicate it without needing the lock itself. They only need the lock if the original key is lost.
Q: How long does a duplicated key last? A well-made copy from a quality locksmith lasts as long as your original—typically years. Copies from worn originals or made on cheap blanks may wear faster.
Q: Is it legal to duplicate someone else's key? Yes, duplicating keys is legal, but only the lock owner should authorize duplication of keys to that lock. Locksmiths may ask for proof of ownership or the original key to verify authorization.
Use Mercoly to compare locksmiths near you and get transparent quotes before booking.