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.

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.

Trailing nexus

Trailing nexus in California

"Trailing nexus" is the duty to keep filing in California for a while after you drop below the threshold. Getting this window wrong is the single most common deregistration mistake — here's California's rule.

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

Has trailing nexus?: Yes
Approx. duration: 12 months
Can deregister below threshold?: Yes, after the window
Tax authority: California Department of Tax and Fee Administration (CDTFA)

Source: State rule

California trailing nexus

California has trailing nexus of roughly 12 months. A remote seller must remain registered and continue collecting use tax through the entire calendar year in which it exceeds the $500,000 threshold AND through the entire following calendar year.

What trailing nexus means

When you drop below California's threshold, the obligation doesn't end instantly. Most states make you keep the registration active and keep filing — even $0 returns — for a defined window. That window is "trailing" (or "sticky") nexus.

California's trailing-nexus rule

A remote seller must remain registered and continue collecting use tax through the entire calendar year in which it exceeds the $500,000 threshold AND through the entire following calendar year. Deregistration is permitted effective January 1 of the second year after the threshold was last exceeded, provided the seller had no physical nexus and its prior-year sales (aggregated with related persons) did not exceed $500,000. Mid-year deregistration is not permitted if the seller anticipates re-crossing the threshold during the current year.

Sellers may not deregister mid-year. Deregistration is only effective on January 1 of a subsequent year. A final return must be filed and all outstanding tax, penalties, and interest must be paid before close-out is complete. The CDTFA cautions that sellers should not close their certificate if they anticipate re-registering during the current year.

Why it matters for canceling

Canceling the day you drop below the threshold — or skipping a required final return — is exactly what triggers penalties. Clear California's window first, file every return due during it, then close the account.

Where TrailingZero fits

TrailingZero connects to your store read-only, maps where you actually have nexus state by state, and computes California's exact trailing-nexus end date so you cancel on the right day, not too early. 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.

California Trailing nexus FAQ

How long is trailing nexus in California?: Roughly 12 months. A remote seller must remain registered and continue collecting use tax through the entire calendar year in which it exceeds the $500,000 threshold AND through the entire following calendar year. Deregistration is permitted effective January 1 of the second year after the threshold was last exceeded, provided the seller had no physical nexus and its prior-year sales (aggregated with related persons) did not exceed $500,000.
Can I stop filing in California right after I drop below the threshold?: Not immediately — you must keep filing through California's trailing window. Sellers may not deregister mid-year. Deregistration is only effective on January 1 of a subsequent year. A final return must be filed and all outstanding tax, penalties, and interest must be paid before close-out is complete. The CDTFA cautions that sellers should not close their certificate if they anticipate re-registering during the current year.
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 California

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Other states

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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.