ID

Idaho Surplus Lines Tax Filing 2026

The Idaho surplus lines tax is 1.5% of gross premium, plus a 0.5% 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

Idaho Rates Snapshot
Surplus Lines Tax 1.5%
Stamping Fee 0.5%
Filing Fee (flat) $3.00

How SLTax360 Files Idaho Surplus Lines Taxes

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

Each Idaho transaction we file is itemized into its components — surplus lines tax (1.5%), stamping fee (0.5%) — 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 Idaho 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 Idaho calculation — no signup required.

Idaho Notes: Idaho: 1.5% SL tax plus 0.5% stamping fee to SLISI.

Idaho Surplus Lines FAQ

As of 2026, the Idaho surplus lines tax rate is 1.5% of gross premium. The tax base in Idaho includes policy fees.

Yes. Idaho applies a stamping fee of 0.5% 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, Idaho also applies a flat filing fee of $3.00. SLTax360 itemizes all of these on every filing so you can audit each line.

SLTax360 automates Idaho 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 Idaho rate in the public calculator before signing up.

Idaho: 1.5% SL tax plus 0.5% stamping fee to SLISI.

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

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