Biodiesel Tax Incentive Reform and Extension Act of 2015

This bill amends the Internal Revenue Code to revise the income and excise tax credits for biodiesel used as fuel to: (1) allow a $1.00 tax credit for each gallon of biodiesel produced, (2) provide for an increased income tax credit for small biodiesel producers, (3) revise the definitions of "biodiesel" and "eligible small biodiesel producer," (4) treat renewable diesel in the same manner as biodiesel for income tax purposes, and (5) extend the biodiesel income and excise tax credits through December 31, 2018.