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Pathfinder Unchained / Fractional Base Bonuses

Base Attack Bonus

Source Pathfinder Unchained pg. 40
There are three base attack bonus progressions. For classes with a d6 Hit Die, their BAB increases by 1/2 per level. For classes with a d8 Hit Die, their BAB increases by 3/4 per level. For classes with a d10 or d12 Hit Die, their BAB increases by 1 per level (so it’s not necessary to round the BAB for these classes). A multiclass character’s base attack bonus will only ever improve using this variant.

For example, a character who’s a 2nd-level rogue and a 9th-level wizard would have a BAB of +5 in the core rules: +1 from her rogue levels and +4 from her wizard levels. Using the fractional system, that character’s BAB would be +6, with +1-1/2 from her rogue levels and +4-1/2 from her wizard levels—enough for her to gain a second attack at a +1 bonus.

Archives of Nethys

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Base Attack Bonus