What is trailing nexus?

Most states make you keep filing for a while after you drop below their threshold. California runs through the next full calendar year. Texas uses a rolling twelve months. We track each state's rule so you cancel on the right date, not too early.

Will I get in trouble for canceling a permit?

Not if you do it in the right order. We file every outstanding and final return first, then guide the cancellation. The real risk is canceling early or skipping a final return, which is exactly what we prevent.

Which platforms do you support?

Amazon, Shopify and WooCommerce, with BigCommerce, Etsy, Walmart and eBay supported through manual entry. You can also enter your states by hand on any platform.

Do you file my returns?

Yes. During the wind-down we file the zero-dollar returns so nothing lapses, and once you're deregistered in a state there's nothing left to file.

How is this different from Avalara or TaxJar?

They help you register and file more. We help you deregister and file less. We only charge for the states you keep.

No. TrailingZero is software that flags deregistration opportunities and handles filings. For complex situations we tell you when to bring in your accountant.

Is TrailingZero live?

Yes. Free audits are live now — run yours in minutes. Connect a store read-only or enter your registered states by hand to see which you can cancel and what it saves.

Does Illinois have a sales tax?

Yes. The statewide base rate is 6.25%. Remote sellers collect it once they have nexus.

Can I cancel my Illinois registration if I'm under the threshold?

Generally yes, after clearing Illinois's trailing-nexus window and filing a final return.

No. This page is general education built from public sources and the rules change often. Confirm your specific situation with the state's tax authority or your accountant before you register or deregister.

Seller's guide

Sales tax in Illinois

Everything an online seller needs to know about sales tax in Illinois: the rate, when you have to register, marketplace rules, filing, and when you can cancel — in plain English.

By John DoeReviewed by Jane Doe, CPAUpdated June 2026How we verify

Statewide base rate: 6.25%
Economic threshold: $100,000 in sales
Marketplace law: Yes
Trailing nexus: Minimal
Tax authority: Illinois Department of Revenue (IDOR)

Source: Illinois Department of Revenue (IDOR)

Nexus & savings calculator

Estimate whether you still have nexus in Illinois — and what canceling could save.

State

Annual sales into Illinois

Transactions (orders) per year

Illinois no longer counts transactions — only sales matter here.

I have physical presence hereFBA/3PL inventory, an employee, or an office in Illinois

Filing frequency

Cost per return

Physical presence
Sales over $100,000
Transactions (not counted here)

Likely eligible to cancel

Based on these numbers you likely no longer have nexus in Illinois. You can usually deregister after clearing the trailing-nexus window and filing your final return.

Trailing nexus: Illinois has limited or no trailing-nexus window — you can generally deregister once your nexus has ended and final returns are filed.

You could stop paying

$600/ yr

How to cancel in Illinois →

Estimate only — general education, not tax advice. Confirm with Illinois's tax authority before you register or deregister.

Do you need to collect sales tax in Illinois?

You have a duty to collect once you have nexus: physical presence (inventory, staff, an office) or economic nexus from crossing $100,000 in sales over preceding 12 months, evaluated quarterly on the last day of March, June, September, and December. Illinois used to trigger nexus at 200 transactions but removed that count in January 2026 — only the sales figure matters now.

The Illinois rate

Illinois imposes a statewide Retailers' Occupation Tax (ROT) at 6.25% on general merchandise. Qualifying food, drugs, and medical appliances are taxed at 1% state rate.

Marketplace and direct sales

Marketplaces like Amazon collect Illinois tax for you, but those sales don't count toward your own threshold. Direct sales on your own store you collect yourself.

Filing and zero returns

Once registered, Illinois requires a return every assigned period even when you owe $0 — miss one and you can face penalties. IDOR assigns filing frequency based on average monthly tax liability.

When you can cancel

If your Illinois returns are mostly $0, you may be over-registered. Canceling your Illinois sales tax registration makes sense if your rolling 12-month Illinois sales have been consistently below $100,000 and you have no physical presence in the state, because Illinois does not have a statutory trailing nexus period that would force you to stay registered. The catch is that you must file a final return (marked as such) before IDOR will process the closure, and you have the ongoing responsibility to monitor your Illinois sales each quarter — if you cross $100,000 again, you must promptly re-register.

Where TrailingZero fits

TrailingZero connects to your store read-only, maps where you actually have nexus state by state, and maps your real nexus in Illinois and flags whether you should register, keep filing, or cancel. During any wind-down it can file the zero-dollar returns so nothing lapses — and you only pay for the states you genuinely keep. Run a free audit anytime; this page is free education either way.

Illinois Sales tax guide FAQ

Does Illinois have a sales tax?: Yes. The statewide base rate is 6.25%. Remote sellers collect it once they have nexus.
When do I have to register for sales tax in Illinois?: When you have physical presence there or cross $100,000 in sales over preceding 12 months, evaluated quarterly on the last day of March, June, September, and December.
Can I cancel my Illinois registration if I'm under the threshold?: Generally yes, after clearing Illinois's trailing-nexus window and filing a final return.
Is this tax advice?: No. This page is general education built from public sources and the rules change often. Confirm your specific situation with the state's tax authority or your accountant before you register or deregister.

See what you can stop paying in Illinois

Run a free audit and see which registrations you can drop — in minutes, no card required.

Start free →Free audit · no card required.

Other states

See all states →

Sources

Primary sources reviewed for this page. Data current as of June 2026.

TrailingZerois software, not a CPA or law firm, and this page is general education — not tax or legal advice. State rules and thresholds change frequently; confirm your situation with the state's tax authority or your accountant before you register or deregister. See how we research and review this data in our editorial & accuracy policy.