Magical/Psionic Armor Enhancements

Magical/Psionic Armor and Shield Enhancements
Bonus Value	Additional Cost	Hardness Increase¹	Additional hp¹
+1	+1,000 gp	+2	+10
+2	+4,000 gp	+4	+20
+3	+9,000 gp	+6	+30
+4	+16,000 gp	+8	+40
+5	+25,000 gp	+10	+50
+6	+36,000 gp²	+12	+60
+7	+49,000 gp²	+14	+70
+8	+64,000 gp²	+16	+80
+9	+81,000 gp²	+18	+90
+10	+100,000 gp²	+20	+100
+11 or more	+ bonus squared × 10,000 gp	+ enhancement bonus × 2	+ enhancement bonus × 10
Unlike the additional cost, the increase to the armor or shield's hardness and hit points are only gained from its enhancement bonus, not its special abilities. If the armor or shield has a magical bonus greater than +5 or a special ability worth more than +5, then it's epic. Multiply magic cost by 10.