Portland Business Filing Deadlines & Ongoing Requirements

Annual federal income tax return (extensions available via Form 7004 / 4868).

Free, one-time federal tax ID needed for tax filings, payroll and bank accounts.

Businesses holding property that has gone unclaimed — uncashed payroll or vendor checks, customer credits and refunds, unused gift cards, deposits — must report and turn it over to the state each year, after sending the owner a due diligence notice before the deadline. The annual report and payment are due November 1 for general property. A negative report is required even when the business holds nothing. Which state's law applies depends on the owner's last known address, or the business's state of incorporation when there is none, so a business can owe reports to several states.

Fee: $100. Required to keep the entity in good standing.

A person or service with a physical Oregon address to receive legal notices and service of process; listed with Oregon Secretary of State, Corporation Division.

Corporate excise tax and Corporate Activity Tax (CAT, gross receipts over $1 million); minimum excise tax by sales. $250 plus 0.57% of Oregon commercial activity above $1 million; no tax is owed at or below $1 million. Tax is due only when annual revenue exceeds $1,000,000.

Oregon business personal property returns are due to the county assessor by March 15 each year; late returns incur penalties of 5%, 25% and 50%. Returns are filed on Form OR-CPPR by email, mail or the county's Smartfile portal.

Portland and Multnomah County levy business income taxes; many cities require business licenses.

The commercial space must be approved for its intended use before operating.

Businesses with Portland-source income file the City Business License Tax and Multnomah County Business Income Tax through the Revenue Division; Metro supportive housing and Preschool for All taxes apply to higher-income owners.

Withheld income tax, Social Security and Medicare, plus employer share, via EFTPS.

Quarterly reconciliation of wages and payroll taxes.

Annual FUTA return and payment.

Wage statements to employees and transmittal to the SSA.

Employment eligibility verification, retained for 3 years after hire or 1 year after termination.

Employers must post the FLSA minimum wage, FMLA (50+ employees), EEO, OSHA, USERRA and related notices in a conspicuous place.

Employer account for state unemployment insurance contributions.

Withhold state income tax from wages and remit on the assigned deposit schedule; file annual reconciliation and W-2s.

Quarterly wage report and contribution payment. Oregon taxes the first $56,700 of each employee's wages (2026); new employers pay 2.4%, and experience-rated rates range from 0.9% to 5.4%.

Federal law requires reporting each new hire within 20 days of hire (some states require sooner).

Required at: 1 employee.

Employers remit contributions quarterly with payroll tax reports.

Oregon employers without a qualified plan must register and facilitate payroll deductions, or certify an exemption (renewed every three years). Registration phases by size have ended. The commissioner can fine up to $100 per eligible employee, capped at $5,000 a year; employees cannot complain until two years after the employer's deadline.

Oregon requires employers with 1+ employees to provide paid sick leave, post notice and keep records.

State minimum wage, unemployment insurance, workers' compensation and anti-discrimination notices must be posted where employees can see them.

Employers with payroll in the TriMet district (parts of Multnomah, Washington and Clackamas counties) report and pay the transit payroll tax on Form OQ each quarter, due April 30, July 31, October 31 and January 31 (next business day if a weekend or holiday). The rate is set each year (0.8037% in 2023); a late payment adds 5%.

Employers offer withholding of Metro's 1% supportive housing services tax on income above $125,000 (individuals) or $200,000 (joint), with payment due on the same dates as federal and Oregon withholding deposits. Reported separately from other local taxes. Applies to workers in the Metro district (Multnomah, Washington and Clackamas counties).

Employers with a Multnomah County location withhold the Preschool for All personal income tax (1.5% above $125,000 or $200,000 joint, and more above $250,000 or $400,000; rates rise in 2026) from employees who work in the county and earn $200,000 or more in the year. It has its own withholding return remitted to the City of Portland.

Employers with more than 10 employees keep Forms 300 and 301 for work-related injuries and illnesses, and post the Form 300A summary for the previous year at each establishment from February 1 through April 30. Records are kept five years. Report a work-related fatality within 8 hours and an inpatient hospitalization, amputation or loss of an eye within 24 hours.

Applicable large employers (50 or more full-time employees, counting part-time hours as full-time equivalents) give each full-time employee a Form 1095-C. The January 31 deadline is extended automatically by 30 days, to March 2 in most years (March 1 for the 2026 forms).

The transmittal Form 1094-C and each Form 1095-C are due to the IRS at the end of February on paper or March 31 electronically; employers filing 10 or more information returns in total must file electronically. Penalties apply per late or incorrect form.

Private employers with 100 or more employees file annually through the EEOC's online system; federal contractors with 50 or more employees and certain contracts have also filed. The EEOC sets each year's window (the 2024 report was due June 24, 2025, with no extensions), so check its data collections page.

Establishments with 250 or more employees submit their Form 300A summary through OSHA's Injury Tracking Application by March 2. Establishments with 20 to 249 employees in designated higher-hazard industries must also submit the summary, and those with 100 or more in the most hazardous industries submit Forms 300 and 301 data.

Quarterly estimated payments by owners on business income (Form 1040-ES), including self-employment tax.

Required for each non-employee paid $2,000 or more in the year (payments made after 2025).

Oregon has no sales tax; see the Corporate Activity Tax under entity taxes.

Home-based businesses need a home occupation permit and must comply with zoning limits (signage, customers, employees).

Oregon registers assumed names at the state level.