Sales tax, income tax, VAT, nexus rules: ecommerce taxes are complex. Learn what you owe, which states apply, and how to set aside tax reserves without overpaying.
StoreWiz Team
Dec 23, 2025 · 13 min read
TL;DR
In 2026, online sellers must collect sales tax in every state where they have economic nexus (typically $100K in sales or 200 transactions). Marketplace facilitator laws mean Amazon and Walmart handle tax on their platforms, but you still owe tax on Shopify direct sales. FBA sellers have physical nexus in 25+ states via inventory placement. International sellers face VAT in the EU (standard rate 20–27%), UK (20%), and Canada (GST 5% + provincial). This guide covers every tax obligation, filing deadline, and compliance strategy for ecommerce in 2026.
Ecommerce tax is not optional and it is not simple. Since the 2018 Wayfair decision gave states the power to tax remote sellers, the landscape has gotten progressively more complex. In 2026, 46 states plus DC and multiple territories charge sales tax, each with different rates, rules, and filing frequencies.
Ignore it and you face back taxes, penalties (typically 10–25% of unpaid tax), and interest charges that compound monthly. This guide covers everything you need to know to stay compliant without spending all your time on tax paperwork.
Sales tax is a consumption tax collected by the seller at the point of sale and remitted to the state. The rate is based on the destination of the shipment, not your business location (in most states).
| Concept | What It Means | Who It Affects |
|---|---|---|
| Physical Nexus | Office, warehouse, employee, or inventory in a state | FBA sellers, anyone with a warehouse |
| Economic Nexus | Exceeding a revenue or transaction threshold | All online sellers above thresholds |
| Marketplace Facilitator | Platform collects and remits tax for you | Amazon, Walmart, Etsy, eBay sellers |
| Origin vs. Destination | Tax rate based on seller (origin) or buyer (destination) location | Varies by state — most use destination |
Every state with sales tax now has an economic nexus law. Most use a $100K revenue threshold, but several differ:
| Threshold | States |
|---|---|
| $100K revenue OR 200 transactions | Most states (AL, AZ, AR, CO, CT, GA, HI, ID, IL, IN, IA, KS, KY, LA, ME, MD, MA, MI, MN, MS, NE, NV, NJ, NM, NY, NC, ND, OH, OK, PA, RI, SC, SD, TN, UT, VT, VA, WA, WV, WI, WY) |
| $100K revenue only | CA, FL, TX (no transaction count threshold) |
| $500K revenue | TX (effective 2026), NY (for certain categories) |
| No sales tax | AK (local only), DE, MT, NH, OR |
Critical for FBA Sellers
Amazon distributes your inventory across fulfillment centers nationwide. Having inventory in a state creates physical nexus, which means you owe sales tax there regardless of whether you have crossed the economic nexus threshold. Check your FBA Inventory Placement reports quarterly to know which states hold your inventory.
Marketplace facilitator laws require platforms like Amazon, Walmart, Etsy, and eBay to collect and remit sales tax on your behalf. As of 2026, all states with sales tax have these laws in effect.
Shopify offers built-in tax calculation, but you need to configure it correctly:
If you sell internationally, you face an entirely different tax system. VAT (Value Added Tax) and GST (Goods and Services Tax) apply in most countries outside the United States.
| Region | Tax Type | Rate | Registration Threshold |
|---|---|---|---|
| EU (IOSS) | VAT | 17–27% (varies by country) | €150 per shipment for IOSS |
| United Kingdom | VAT | 20% | £85,000 annual (UK sellers); £0 for non-UK sellers |
| Canada | GST + PST/HST | 5–15% (varies by province) | CAD $30,000 annual |
| Australia | GST | 10% | AUD $75,000 annual |
| Japan | JCT | 10% | ¥10M annual |
For shipments to the EU valued under €150, the IOSS system lets you charge VAT at checkout and remit it through a single EU filing. This speeds up customs clearance for your customers and avoids surprise duties at delivery.
Missing a filing deadline triggers penalties and interest. Here are the key dates:
| Tax Type | Frequency | Key Deadlines |
|---|---|---|
| Federal Income Tax (sole prop) | Annual | April 15, 2027 (for 2026 tax year) |
| Federal Estimated Tax | Quarterly | Apr 15, Jun 15, Sep 15, Jan 15 |
| State Sales Tax | Monthly or Quarterly | Varies by state (typically 20th of following month) |
| EU VAT (IOSS) | Monthly | End of month following reporting period |
| UK VAT | Quarterly | 1 month + 7 days after quarter end |
These deductions reduce your taxable income. Many sellers miss several of them:
Manual sales tax compliance across 20+ states is impractical. These tools automate the process:
| Tool | Starting Price | Best For | Key Feature |
|---|---|---|---|
| TaxJar | $19/mo | Small-to-mid sellers | AutoFile in 30+ states |
| Avalara | Custom pricing | Complex multi-state sellers | 12,000+ jurisdiction rates |
| Shopify Tax | Included with Shopify | Shopify-only sellers | Built-in, no extra integration |
| Tax Compliance by Vertex | Custom pricing | Enterprise sellers | International VAT support |
Platforms like StoreWiz integrate with these tax tools and help track your nexus obligations by monitoring sales volume per state in real time — alerting you before you cross thresholds.
Key Takeaways
You still owe sales tax in states where you have physical nexus (your home state, FBA warehouse states). The $100K threshold applies only to economic nexus. Additionally, some states have a 200-transaction threshold that you might hit before reaching $100K in revenue. Always register in your home state regardless of revenue.
Most states offer voluntary disclosure agreements (VDAs) that reduce penalties for coming into compliance voluntarily. The typical terms are: pay back taxes for 3–4 years (instead of the full lookback period), reduced or waived penalties, and a payment plan. Consult a sales tax professional before filing a VDA — the specifics vary significantly by state.
It depends on the state. Some states tax shipping charges, others exempt them if listed separately on the invoice, and some have complex rules based on whether shipping is a flat fee or calculated. TaxJar and Avalara handle this automatically per jurisdiction. As a general rule, if you offer free shipping (built into the product price), the full amount including the embedded shipping cost is taxable.
Yes. The EU, UK, and many other countries require VAT on digital products and services sold to consumers. The EU uses the OSS (One-Stop Shop) system for digital services, which lets you file a single return for all EU countries. If you sell digital products, subscriptions, or downloadable goods internationally, you likely have VAT obligations.
Written by StoreWiz Team
Tax Specialist
The StoreWiz team writes about ecommerce automation, AI operations, and growth strategies for modern online sellers. Our insights come from building technology that helps brands scale without scaling headcount.
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