How long should a business keep tax records?

Oregon Business Tax Record Retention Guidelines

Maintaining proper tax records is essential for compliance and smooth business operations in Oregon. As of 2026, businesses should follow these practical guidelines for retaining tax records.

Recommended Retention Period

• Keep tax records for at least 7 years. This includes income tax returns, supporting documents, receipts, and payroll records.
• Oregon Department of Revenue and the IRS can audit returns within this timeframe, so having accessible records is critical for verification.
• If your business files employment taxes, retain payroll and employee classification documents for a minimum of 4 years after the tax period.

Types of Records to Retain

• Federal and Oregon state income tax returns
• Sales and use tax filings and exemption certificates
• Payroll tax filings and wage records
• Expense receipts and invoices
• Bank statements and canceled checks related to tax payments
• Records of business assets and depreciation schedules

Operational Tips

• Implement bookkeeping and recordkeeping automation to organize and securely store tax documents.
• Regularly back up digital records and maintain physical copies in a secure location.
• Coordinate with your accountant or tax professional to ensure compliance with both Oregon and federal recordkeeping requirements.
• Review retention policies annually to adjust for any regulatory changes.