Oregon follows both federal deductions, allowing the same amounts your federal return does. It taxes federal AGI from 4.75% to 9.9% after a small standard deduction, then subtracts the federal income tax you actually paid — up to $8,750 — and takes a $260 credit per filer off the result. Because that subtraction tracks your federal bill, claiming the tips deduction shrinks it, which offsets a little of the gain.
What it means on a real paycheck
Take a single filer earning $50,000 a year, $8,000 of it in tips. Against the same person with no tips to declare, the federal deduction is worth $960.
In Oregon it is worth $616 more, because the state follows the federal deduction. Together that is $1,576.
How Oregon works out the tax
Oregon charges graduated rates from 4.75% up to 9.9%, across four bands, after a standard deduction of $2,900 single or $5,800 filing jointly. It begins from your federal adjusted gross income and applies its own reliefs from there.