Sales Tax for Online Sellers Calculator
What you remit, and what compliance costs.
Rates change with budgets and local ballot measures, and the rate that applies depends on the delivery address and product category. Treat these as planning figures, not as a filing.
Tax you must remit
$3,510
$14,040 is the marketplace's responsibility
Marketplace facilitator laws shift collection to the platform, so $14,040 never touches your return. But marketplace sales still count toward the nexus thresholds in most states, which is how sellers end up registered in states where they only owe tax on a small slice of direct sales — and paying $3,240 a year to file it.
How the Sales Tax for Online Sellers Calculator works
The tax an online seller actually remits is often a small fraction of their revenue, because marketplaces collect on their own sales. What is not small is the compliance cost — registering, filing and remitting in six or eight states can cost more than the tax on your direct sales.
Not financial advice. Marketplace fees change, and they vary by country, plan and seller status. Every rate here is an editable default, not a quoted price — check the platform's current fee schedule before you price a product against it. This is not tax or business advice.
Frequently asked questions
How much does sales tax compliance cost?
Filing fees, software or an accountant typically run £30-60 per state per filing. Monthly filing in eight states is around a hundred returns a year, which is a real cost whether you pay in money or in time.
Can I file less often?
Usually yes — most states assign filing frequency based on volume, and low-volume registrants often qualify for quarterly or annual filing. Ask; states rarely downgrade your frequency without being prompted.
Is it worth deregistering in a state?
If you have fallen well below the threshold and expect to stay there, yes — but check the trailing lookback rules first, and be aware you must re-register if you cross again. Some states require notice before you stop filing.
Should I use automated tax software?
Once you are registered in more than about three states, yes. Rate accuracy at address level is not something to maintain by hand, and the filing automation usually costs less than the accountant time it replaces.