Article

How Many Keys Should You Cut?

Updated October 11, 2026

The formula: people plus spares plus one

Count every regular user, add one spare per lock group for lockouts, and add one sealed master spare stored off-site. A couple in a one-key house cuts four: two carried, one with a neighbor, one sealed at the office.

What raises the count

• Kids and cleaners — restricted spares beat hiding a key under the mat.
• Keyed-different groups — each group multiplies the count. Simplify first with keyed-alike.
• Rentals — tenant plus manager plus turnover spare per unit.

Price it before the counter

Standard keys cut for a few dollars; restricted and high-security blanks cost more and only through authorized shops. Run the duplication planner with your headcount, then read the move-in checklist if this is a new home.