BigCommerce Wrong Tax or Flat 10% Tax at Checkout
Quick answer
Wrong tax is a missing tax zone, a wrong product tax class, or the automatic tax provider falling back to a flat 10% rate when it cannot connect or the origin address is missing.
Most likely fix: Check basic tax
How to fix it
Try these in order — the most common fix is first.
1. Check basic tax
- Open Settings > Tax and the Tax Rates & Zones section
- Confirm a zone covers the address and rates are enabled
- Set Tax Calculation Priority if there are several rates
Did this fix it?2. Check tax settings
- Confirm whether prices are entered with or without tax
- Confirm the calculation address method
- Review shipping and handling tax classes
Did this fix it?3. Fix flat 10%
- Confirm the shipping origin in Shipping settings
- Check your tax provider's status
- Review the fallback option; disabling it blocks checkout on failure
Did this fix it?
Symptoms
Tax is zero, too high or exactly 10% at checkout.
Why it happens
- Missing or disabled tax zone or rate
- Product has the wrong tax class
- Prices entered with the wrong tax setting
- Automatic tax provider connection failed and fallback applied
- No shipping origin set
This guide also covers
- bigcommerce tax wrong checkout
- bigcommerce 10% tax
- bigcommerce tax not calculating
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