IL

Illinois Surplus Lines Tax Filing 2026

The Illinois surplus lines tax is 3.5% of gross premium, plus a 0.04% stamping fee. SLTax360 automates every filing so MGAs, wholesalers, and retail brokers stay compliant without manual entry.

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Rates effective from 2024-01-01

Illinois Rates Snapshot
Surplus Lines Tax 3.5%
Stamping Fee 0.04%
Fire Marshal Tax 1%

How SLTax360 Files Illinois Surplus Lines Taxes

Filing surplus lines tax in Illinois means navigating Illinois's specific submission channel, fee structure, and deadline rules. SLTax360 abstracts that away: we maintain the Illinois rate configuration in a versioned table and apply it automatically to every invoice you submit.

Each Illinois transaction we file is itemized into its components — surplus lines tax (3.5%), stamping fee (0.04%) — so your audit trail shows exactly which line went where. Confirmations are retained, deadlines are tracked, and filings are reconciled against your invoice data.

Whether you're an MGA filing a handful of Illinois transactions per month or a wholesaler running hundreds, the workflow is the same: upload, we file, you stay compliant. Want to verify the numbers yourself first? Run a free Illinois calculation — no signup required.

Illinois Notes: Illinois: 3.5% SL tax. Fire marshal 0.5% on fire lines. 0.5% privilege tax surcharge.

Illinois Surplus Lines FAQ

As of 2026, the Illinois surplus lines tax rate is 3.5% of gross premium. The tax base in Illinois includes policy fees.

Yes. Illinois applies a stamping fee of 0.04% on top of the surplus lines tax. Stamping fees fund the state-designated stamping office that reviews and processes filings.

Beyond the base surplus lines tax and stamping fee, Illinois also applies a fire marshal tax of 1%. SLTax360 itemizes all of these on every filing so you can audit each line.

SLTax360 automates Illinois surplus lines tax filing for MGAs, wholesalers, and retail brokers. We submit each transaction through the appropriate state-mandated channel (OPTins, SLIP+, or the state's own portal where applicable), retain audit-ready confirmations, and track deadlines so nothing slips. Try the free Illinois rate in the public calculator before signing up.

Illinois: 3.5% SL tax. Fire marshal 0.5% on fire lines. 0.5% privilege tax surcharge.

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A 20-minute demo will show you how SLTax360 handles your Illinois volume end-to-end.

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