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Table: Cost Modifiers for Mechanical Traps
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Feature
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Cost Modifier
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Trigger Type
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Location
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—
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Proximity
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+1,000 gp
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Touch
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—
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Touch (attached)
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–100 gp
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Timed
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+1,000 gp
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Reset Type
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No reset
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–500 gp
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Repair
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–200 gp
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Manual
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—
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Automatic
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+500 gp (or 0 if trap has timed trigger)
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Bypass Type
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Lock
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+100 gp (Open Lock DC 30)
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Hidden switch
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+200 gp (Search DC 25)
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Hidden lock
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+300 gp (Open Lock DC 30, Search DC 25)
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Search DC
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19 or lower
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–100 gp x (20 – DC)
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20
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—
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21 or higher
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+200 gp x (DC – 20)
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Disable Device DC
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19 or lower
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–100 gp x (20 – DC)
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20
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—
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21 or higher
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+200 gp x (DC – 20)
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Reflex Save DC (Pit or Other Save-Dependent Trap)
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19 or lower
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–100 gp x (20 – DC)
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20
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—
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21 or higher
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+300 gp x (DC – 20)
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Attack Bonus (Melee or Ranged Attack Trap)
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+9 or lower
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–100 gp x (10 – bonus)
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+10
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—
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+11 or higher
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+200 gp x (bonus – 10)
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Damage Bonus
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High strength rating (ranged attack trap)
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+100 gp x bonus (max +4)
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High Strength bonus (melee attack trap)
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+100 gp x bonus (max +8)
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Miscellaneous Features
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Never miss
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+1,000 gp
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Poison
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Cost of poison*
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Alchemical item
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Cost of item*
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* Multiply cost by 20 if trap features automatic reset.
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