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 2026-07-24

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

Estimate only. Figures are calculated from published state rates and are not a guarantee of the amounts due. Verify with the applicable state or stamping office before filing.

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%). Your audit trail then shows exactly which line went where. Confirmations are retained, deadlines are tracked, and filings are reconciled against your invoice data.

How Illinois filings are submitted: SLTax360 transmits Illinois filings electronically via REST API (IL SLAI). Confirmation numbers come back into the platform automatically, and rejections are surfaced as errors rather than left sitting as “filed.” You keep your own Illinois licence and portal login either way.

Whether you're an MGA filing a handful of Illinois transactions per month or a wholesaler running hundreds, the amounts, the deadline and the paperwork are handled in one place. Want to verify the numbers yourself first? Run a free Illinois calculation (no signup required).

Illinois Notes: Illinois: 3.5% surplus lines tax and 0.04% SLAI stamping fee. Fire marshal tax is 1%, assessed on a coverage-specific share of premium (property/fire lines only). All amounts round to the nearest whole dollar.

Illinois Surplus Lines FAQ

As of 2026, the Illinois surplus lines tax rate is 3.5% of gross premium. The tax base in Illinois does not include 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.

Yes. SLTax360 transmits Illinois surplus lines filings electronically via REST API (IL SLAI). Confirmation numbers are returned into the platform automatically and state rejections are surfaced as errors, so a filing never sits marked as filed when the state did not accept it. You keep your own Illinois licence and portal login. Try the free Illinois rate in the public calculator before signing up.

Illinois: 3.5% surplus lines tax and 0.04% SLAI stamping fee. Fire marshal tax is 1%, assessed on a coverage-specific share of premium (property/fire lines only). All amounts round to the nearest whole dollar.

Ready to Take Illinois Filings Off Your Desk?

A 20-minute demo will show you exactly how your Illinois volume runs end to end, and what changes in the other states you write.

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