Proficiency Bonus by Challenge Rating

SectionMonsters
ChallengeProficiency Bonus
0+2
+2
¼+2
½+2
1+2
2+2
3+2
4+2
5+3
6+3
7+3
8+3
9+4
10+4
11+4
12+4
13+5
14+5
15+5
16+5
17+6
18+6
19+6
20+6
21+7
22+7
23+7
24+7
25+8
26+8
27+8
28+8
29+9
30+9