Intermediate Quick Answer
What if I sell through multiple channels — Shopify, Amazon, and my own website?
⚡ TL;DR
Multi-channel compliance requires consolidating sales across all channels for nexus threshold purposes — $60K on Amazon plus $50K on Shopify equals $110K, which crosses the $100K threshold in most states. Amazon handles collection on marketplace sales; you collect and remit on direct channels. A single compliance platform connected to all channels is the most operationally efficient approach.
Multi-channel compliance requires consolidating all channel data but treating each channel’s tax collection separately.
Key takeaways
- Amazon (and other marketplaces): marketplace facilitator law requires Amazon to collect and remit state sales tax on your behalf; you don’t collect tax separately on Amazon orders; Amazon generates its own sales tax remittances for those transactions
- Shopify / own website / DTC: you configure and manage your own tax collection; a calculation engine integrated with Shopify handles rate determination; AutoFile handles return submission
- Wholesale / B2B orders: may be exempt if customers provide valid resale certificates; exempt sales need to be tracked separately from taxable sales in every channel
- Nexus threshold aggregation: most states require you to add up sales across all channels when assessing whether you’ve crossed the economic nexus threshold — $60K on Amazon + $50K on Shopify = $110K total, which crosses $100K in most states
- Marketplace sales on state returns: some states require all sales (including marketplace-facilitated) to be reported on your return with a deduction for marketplace-collected amounts; others only require you to report the sales you collected tax on directly, check state-specific instructions
- Reporting reconciliation: your books should show gross sales by channel by state, with a clear mapping of which sales had tax collected by you vs. by the marketplace; this is essential for accurate state return preparation and for audit defense
- Single compliance platform: the most operationally efficient approach is a single compliance platform connected to all sales channels, aggregating data, calculating tax for direct-sale channels, and generating consolidated filing reports
Frequently asked questions
How do I handle sales tax when I sell on Shopify, Amazon, and my own website?
Each channel handles tax differently. Amazon collects and remits sales tax on marketplace-facilitated sales, so you don't collect tax separately on Amazon orders. Shopify and your own website require you to configure sales tax collection and remit it yourself. For state filing, you generally exclude marketplace-facilitated sales from the tax you collected and remit, since Amazon already paid it, but some states want those sales reported on your return (with a marketplace deduction) for informational purposes.
Do Amazon sales count toward my economic nexus threshold?
It depends on the state. Some states count all sales into the state toward the threshold, including marketplace-facilitated sales. Other states explicitly exclude marketplace-facilitated sales from the threshold calculation. This matters most for sellers who primarily sell on Amazon, in states that exclude marketplace sales, a pure Amazon seller may not have nexus even with significant sales volume.
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