Washington State B&O Tax
- Prepare and file monthly, quarterly, and annual Washington B&O tax returns.
- Reconcile revenue with bookkeeping records to avoid reporting errors.
- Review past filings, correct errors, and prepare amended returns when necessary.
Our goal is to help business owners stay compliant, avoid costly mistakes, and pay only the taxes they legally owe.
At BookSmart Accounting, we help contractors, subcontractors, and real estate professionals navigate Washington State Business & Occupation (B&O) tax requirements. Unlike income tax, B&O tax is generally based on gross revenue rather than profit.
We handle monthly, quarterly, and annual filings, reconcile business income, identify eligible deductions, and correct reporting errors. Common mistakes we see include misclassifying revenue, reporting non-business deposits as income, claiming incorrect deductions, and missing filing deadlines.
Who usually owes B&O tax?
- General contractors and subcontractors performing construction services in Washington State.
- Real estate agents and brokers earning commissions from real estate transactions.
- Self-employed individuals and business owners providing taxable services in Washington.
- B&O tax is generally calculated on gross business revenue, not net profit, subject to applicable deductions, exemptions, and credits.
- Even businesses with little or no profit may owe B&O tax.
What we handle for clients
- Prepare and file monthly, quarterly, and annual Washington B&O tax returns.
- Review business income, sales reports, invoices, and bank deposits to determine taxable gross revenue.
- Reconcile revenue with bookkeeping records to avoid reporting errors.
- Identify allowable deductions, exemptions, and credits.
- Help construction businesses properly account for retail sales tax, wholesale activities, and subcontractor payments.
- Assist real estate professionals with reporting commission income accurately.
- Review past filings, correct errors, and prepare amended returns when necessary.
- Help clients meet Washington Department of Revenue deadlines and avoid unnecessary penalties.
Common mistakes we see
- Confusing gross revenue with net profit: Reporting income after deducting operating expenses.
- Including non-business deposits as revenue: Mistakenly reporting owner contributions, loans, or transfers as sales.
- Incorrect sales tax deductions: Assuming all payments to subcontractors or suppliers qualify for the sales tax paid at source deduction.
- Misclassifying construction income: Reporting wholesale construction, retail construction, or service income under the wrong tax classification.
- Incorrect commission reporting: Real estate agents reporting the wrong commission amount or applying unsupported deductions.
- Missing filing deadlines: Assuming no tax due means no return is required.
- Poor recordkeeping: Incomplete invoices, sales reports, and bank statements leading to inaccurate returns.
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