C-Corp Tax Planning in Washington State

Mastering the WA B&O Tax, Federal Compliance, and the Impact of Double Taxation.

Your Tax Compliance Timeline

Navigate your C-Corp's tax responsibilities by filing frequency: initial setup, recurring payments, and annual reporting.

Concept: The C-Corp Double Taxation Trap

C-Corporations are taxed at two levels—the corporate level and the shareholder level. Click to see a simplified flow and its impact.

Double Taxation Flow:

1. Corporate Earnings: $100.00

2. Federal Corporate Income Tax (21%): -$21.00

3. Retained Earnings/Dividends: $79.00

WA's Primary Tax: B&O (Gross Receipts)

Unlike income tax, the B&O tax is assessed on **gross revenue** (total sales), not profit. The rate varies significantly by business activity, as shown below: