The Wisconsin surplus lines tax is 3% of gross premium. SLTax360 automates every filing so MGAs, wholesalers, and retail brokers stay compliant without manual entry.
Rates effective from 2026-07-24
| Surplus Lines Tax | 3% |
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.
Filing surplus lines tax in Wisconsin means navigating Wisconsin's specific submission channel, fee structure, and deadline rules. SLTax360 abstracts that away: we maintain the Wisconsin rate configuration in a versioned table and apply it automatically to every invoice you submit.
Each Wisconsin transaction we file is itemized into its components: surplus lines tax (3%). Your audit trail then 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 Wisconsin 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 Wisconsin calculation (no signup required).
A 20-minute demo will show you exactly how your Wisconsin volume runs end to end, and what changes in the other states you write.