Illinois answers the marketplace-seller question by looking at eBay's numbers, not yours.

The Bottom Line for Illinois eBay Sellers

Illinois is built around a facilitator-first test that most sellers never learn about until they go looking: whether you owe your own registration for marketplace sales depends on whether eBay itself has crossed Illinois's own tax-remittance threshold, not on your personal sales volume. For any seller on a platform the size of eBay, that test resolves itself immediately, but the mechanism matters for understanding what an LLC does and doesn't change.

The Illinois Department of Revenue's own flowchart for remote and marketplace sellers routes the question through the facilitator's aggregate Illinois receipts across all the sellers on its platform, not through any individual seller's numbers. When the facilitator clears that bar, which a platform eBay's size does without question, the department's guidance states plainly that the facilitator is the retailer for those sales, not you, and your own remote-retailer registration calculation gets to exclude those receipts entirely. An LLC doesn't change that mechanism. What it changes is exposure once you've activity Illinois's marketplace test doesn't resolve for you: direct sales, wholesale purchases, or a registered-dealer relationship with a supplier.

If every one of your sales into Illinois runs through eBay, you do not need your own Illinois sales-tax registration — eBay is the one collecting and remitting. Illinois counts marketplace sales toward the $100,000 threshold only in some circumstances: Illinois evaluates the $100,000 tax remittance threshold separately for the marketplace facilitator (aggregated across ALL of its marketplace sellers' Illinois sales) and for the individual remote seller's own non-marketplace sales. Per the Department of Revenue's official guide PIO-125: if the marketplace facilitator itself meets or exceeds $100,000 in aggregate Illinois gross receipts (true for virtually all major platforms such as eBay/Amazon/Etsy), the facilitator alone is liable to collect and remit tax on those facilitated sales, and the individual marketplace seller does not need to fold those sales into its own threshold analysis for that purpose. Only if the facilitator itself falls short of $100,000 in aggregate Illinois sales does responsibility -- and the seller's own threshold determination -- shift back to the individual marketplace seller. In practice, for eBay sellers specifically, eBay's own Illinois marketplace sales volume is certain to exceed $100,000, so a typical eBay-only seller's marketplace sales do not need to be added to that seller's own threshold count.. Illinois sets its own 1099-K threshold at $1,000 and 3 transactions, well below the federal $20,000 and 200 transactions — so a Illinois seller can get a 1099-K on volume that would trigger nothing federally.

eBay Collects Illinois Sales Tax. What Is Still Yours?

If every one of your sales into Illinois runs through eBay, you do not need your own Illinois sales-tax registration — eBay is the one collecting and remitting.

Because Illinois evaluates the facilitator's own aggregate threshold rather than yours, a seller whose only Illinois activity runs through eBay effectively has nothing of their own to register, the department's guidance instructs you not to include gross receipts made over a marketplace that has already met the state's remittance threshold when you work out whether you're a "remote retailer" subject to registration. That framing is different from most states in this cluster, which ask a simpler yes-or-no about the seller's own sales. It also means the exemption is not really about you at all: if you ever sold through a smaller platform that had not itself crossed Illinois's threshold, the calculus would flip and your own sales would suddenly count. For eBay specifically, that scenario does not arise, but understanding the mechanism matters if your business ever diversifies onto a platform that isn't already collecting at scale.

Do Your eBay Sales Count Toward Illinois's Nexus Test?

Illinois counts marketplace sales toward the $100,000 threshold only in some circumstances: Illinois evaluates the $100,000 tax remittance threshold separately for the marketplace facilitator (aggregated across ALL of its marketplace sellers' Illinois sales) and for the individual remote seller's own non-marketplace sales. Per the Department of Revenue's official guide PIO-125: if the marketplace facilitator itself meets or exceeds $100,000 in aggregate Illinois gross receipts (true for virtually all major platforms such as eBay/Amazon/Etsy), the facilitator alone is liable to collect and remit tax on those facilitated sales, and the individual marketplace seller does not need to fold those sales into its own threshold analysis for that purpose. Only if the facilitator itself falls short of $100,000 in aggregate Illinois sales does responsibility -- and the seller's own threshold determination -- shift back to the individual marketplace seller. In practice, for eBay sellers specifically, eBay's own Illinois marketplace sales volume is certain to exceed $100,000, so a typical eBay-only seller's marketplace sales do not need to be added to that seller's own threshold count..

Illinois runs two separate threshold calculations at once, one for the facilitator, aggregated across everything it sells into Illinois on behalf of every seller on its platform, and one for you, covering your own direct receipts. A seller with both eBay sales and a direct Illinois-facing storefront needs to keep those two ledgers apart, because only the direct-sales ledger currently counts toward your personal registration threshold as long as eBay's own aggregate stays above the state's bar. That's a genuinely different structure from states where a seller's marketplace and direct sales get summed into one running total, and it's worth understanding precisely because it's easy to misapply if you assume Illinois works like its neighbors.

Illinois's 1099-K Threshold

Illinois sets its own 1099-K threshold at $1,000 and 3 transactions, well below the federal $20,000 and 200 transactions — so a Illinois seller can get a 1099-K on volume that would trigger nothing federally.

Illinois sets its own dollar-and-transaction-count figure for when a third-party settlement organization must report your activity, and that figure sits well below the federal test, Illinois's statute expressly overrides the federal de minimis limitation with a lower bar of its own. Practically, that means an Illinois-based eBay seller can receive a 1099-K on volume that would generate nothing at all under the federal rule, so the form is likely to show up earlier in a seller's growth here than in a state that simply defers to the IRS. As always, the number on the form is gross payment volume, not profit, subtract fees, refunds and cost of goods before treating it as a tax bill.

Buying Inventory to Resell in Illinois

Illinois accepts a resale certificate issued by another state, so you can buy inventory for resale without registering here first.

Illinois's own Certificate of Resale (Form CRT-61) has an explicit checkbox: 'The purchaser is an out-of-State purchaser authorized to do business out-of-State and not required to be registered as a retailer or reseller in Illinois... Enter the other state name and account/registration number (or attach copy of registration to Form CRT-61).' The instructions also state acceptable resale documentation includes 'the purchaser's Illinois retailer account ID number, Illinois reseller account ID number, or a Certificate of Resale to an out-of-State purchaser.' This CORRECTS the commonly-reported position that Illinois refuses out-of-state resale certificates, Illinois's own form explicitly accommodates an out-of-state seller's home-state registration number as sufficient proof, with no Illinois registration required.

There's a persistent claim that Illinois refuses out-of-state resale certificates, and it's wrong: Illinois's own current resale certificate form has a dedicated checkbox letting an out-of-state purchaser certify their status using their home state's account or registration number, with no Illinois registration required. A supplier here who insists otherwise is applying a rule that isn't on the form. On used goods, Illinois's one statewide resale-dealer statute is narrow by design. It covers jewelry, stamps, electronics, and precious metals specifically, and explicitly exempts pawnbrokers and coin dealers from its scope. It doesn't reach an ordinary reseller of clothing, books, or general merchandise at the state level; that gap is filled locally instead, with cities including Chicago and Peoria running their own secondhand-dealer licensing separate from anything in state law.

Illinois leaves second-hand dealer licensing to cities and counties, so check your own. Illinois's one statewide statute in this space, the Resale Dealers Act (815 ILCS 398), does NOT reach general resale of ordinary used goods: its definition of 'resale dealer' is limited to businesses buying/selling jewelry, stamps, electronic equipment (including wireless communications devices), or precious metals previously owned by a consumer (815 ILCS 398/5), and it explicitly excludes pawnbrokers, coin dealers, and recyclable-metal dealers (815 ILCS 398/10). Even for the categories it does cover, the Act imposes recordkeeping/reporting duties, not a license or permit. General secondhand-dealer licensing for ordinary used goods (clothing, furniture, general merchandise) is instead handled by individual municipalities, e.g., Chicago requires a BACP 'Secondhand Dealer' license under Municipal Code Ch. 4-264 with 24-hour transaction reporting to police, and Peoria issues its own Secondhand Dealer License. There is no single state license reaching general online resale.

Setting Up to Sell on eBay from Illinois

1. Confirm which of your channels actually collect Illinois tax

   Illinois's marketplace exclusion depends on the facilitator's own aggregate threshold, not just its existence. A platform the size of eBay clears that bar easily; a smaller or newer platform might not.

2. Form the LLC before you diversify beyond a single large platform

   The entity protects you from liability regardless of which threshold mechanism applies. Filing early means the structure is already in place if your channel mix ever changes Illinois's calculus.

3. Keep marketplace and direct-sale receipts in separate columns

   Illinois evaluates your own registration threshold using only your direct, non-marketplace receipts while a qualifying facilitator handles the rest. Mixed bookkeeping makes that split impossible to reconstruct later.

4. Use Illinois's own resale certificate checkbox when buying wholesale

   Illinois's current form explicitly accepts an out-of-state account number for a purchaser not required to register here. Don't let a supplier's mistaken assumption about Illinois policy cost you the exemption.

5. Check Chicago or Peoria licensing rules if you resell used goods locally

   Illinois's statewide resale-dealer statute doesn't reach general secondhand merchandise. If your business is based in a city running its own licensing scheme, that local rule is the one that actually applies to you.

Who to Ask in Illinois

The Illinois Department of Revenue publishes an unusually detailed set of flowcharts and guides for remote and marketplace sellers, and its own "Making Sales to Illinois Customers" flowchart is the fastest way to work through your specific situation rather than relying on general summaries. The Illinois Secretary of State's Department of Business Services handles LLC formation and annual filings, entirely separately from anything the Department of Revenue tracks. If your business touches secondhand goods, check directly with the city or county where you're based, since Chicago's and Peoria's licensing schemes exist independently of state law and neither office coordinates with the state revenue agency.

Sources

• https://tax.illinois.gov/content/dam/soi/en/web/tax/research/taxinformation/sales/documents/pio-104.pdf
• https://tax.illinois.gov/content/dam/soi/en/web/tax/research/taxinformation/sales/documents/pio-125.pdf
• https://tax.illinois.gov/research/taxinformation/sales/level-the-playing-field.html
• https://tax.illinois.gov/research/publications/bulletins/fy-2026-13.html
• https://www.ilga.gov/legislation/ilcs/documents/003500050K703A.htm
• https://tax.illinois.gov/research/publications/pubs/filing-and-storage-requirements-for-employers-and-payers.html
• https://tax.illinois.gov/content/dam/soi/en/web/tax/forms/sales/documents/sales/crt-61.pdf
• https://tax.illinois.gov/content/dam/soi/en/web/tax/forms/sales/documents/sales/CRT-61Instr.pdf
• https://ilga.gov/documents/legislation/ilcs/documents/081503980K5.htm
• https://ilga.gov/documents/legislation/ilcs/documents/081503980K10.htm
• https://ilga.gov/documents/legislation/ilcs/documents/081503980K15.htm
• https://tax.illinois.gov/research/publications/bulletins/fy-2026-12.html
• https://tax.illinois.gov/aboutidor/taxrates.html
• https://tax.illinois.gov/programs.html
• https://www.irs.gov/instructions/i1099k

Federal 1099-K threshold: IRC § 6050W(e), as amended by § 70432(a) of the One, Big, Beautiful Bill Act (P.L. 119-21, July 4, 2025). A third-party settlement organization such as eBay must file Form 1099-K only if BOTH tests are met for the calendar year: gross payments exceed $20,000 AND the number of transactions exceeds 200. These are the figures for tax year 2026. There is no forward phase-in: § 70432(a) takes effect "as if included in section 9674 of the American Rescue Plan Act," so the same $20,000 / 200 figures apply retroactively to calendar years after 2021 (tax years 2022 through 2026 alike). The $600 threshold enacted by ARPA § 9674 (P.L. 117-2) was repealed before it operated, and the IRS transition-relief thresholds previously announced for 2024 and 2025 are superseded. A platform may issue a 1099-K below these figures, and a state may set a lower TPSO threshold, in which case a seller can receive a 1099-K without meeting the federal test.. Verified 2026-08-08.