The Wisconsin surplus lines tax is 3% of gross premium. SLTax360 builds the file the state asks for and keeps the confirmation once it is submitted.
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.
Wisconsin sets its own filing channel, fees and deadlines. We keep the Wisconsin rates and rules current and apply them to every invoice, so nobody on your team has to check a bulletin by hand.
Each Wisconsin transaction we file is itemized into its components: surplus lines tax (3%). Your audit trail shows exactly which line went where. Confirmations are kept, 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).
In a 15-minute call we show you how your Wisconsin volume would run end to end, and what changes in the other states you write.