Oregon Revised Statutes Revenue and Taxation § 315.266

(1) In addition to any other credit available for purposes of ORS chapter 316, an eligible resident individual shall be allowed a credit against the tax otherwise due under ORS chapter 316 for the tax year in an amount equal to eight percent of the earned income credit allowable to the individual for the same tax year under section 32 of the Internal Revenue Code.  1

(2) An eligible nonresident individual shall be allowed the credit computed in the same manner and subject to the same limitations as the credit allowed a resident by subsection (1) of this section.  However, the credit shall be prorated using the proportion provided in ORS 316.117.

(3) If a change in the taxable year of a taxpayer occurs as described in ORS 314.085, or if the Department of Revenue terminates the taxpayer's taxable year under ORS 314.440, the credit allowed by this section shall be prorated or computed in a manner consistent with ORS 314.085.

(4) If a change in the status of a taxpayer from resident to nonresident or from nonresident to resident occurs, the credit allowed by this section shall be determined in a manner consistent with ORS 316.117.

(5) If the amount allowable as a credit under this section, when added to the sum of the amounts allowable as payment of tax under ORS 316.187 or 316.583, other tax prepayment amounts and other refundable credit amounts, exceeds the taxes imposed by ORS chapters 314 and 316 for the tax year after application of any nonrefundable credits allowable for purposes of ORS chapter 316 for the tax year, the amount of the excess shall be refunded to the taxpayer as provided in ORS 316.502.

(6) The Department of Revenue may adopt rules for purposes of this section, including but not limited to rules relating to proof of eligibility and the furnishing of information regarding the federal earned income credit claimed by the taxpayer for the tax year.

(7) Refunds attributable to the earned income credit allowed under this section shall not bear interest.