Wisconsin Late Fee Calculator
Based on Wis. Stat. §138.04 (legal rate of interest)
QuickBillMaker applies late fees automatically based on your configured policy. Set it once and stop chasing payments by hand.
How Wisconsin late fees work
In Wisconsin, late payment fees on commercial invoices are governed by Wis. Stat. §138.04 (legal rate of interest). The legal maximum is 0.42% per month (5.04% annualized). Legal rate 5% per year; written contracts may set higher rates (no usury cap on amounts ≥ $150,000 or commercial loans).
The fee must be stated in a written agreement before the work is performed. Without a written rate, only the statutory default rate applies.
Wisconsin prompt-pay law
Wisconsin Prompt Payment Act (Wis. Stat. §66.0135 for public; §779.135 for construction) Construction subs paid within 7 days of GC receiving payment; 12% per year interest if late.
Stop calculating late fees by hand
QuickBillMaker applies your Wisconsin late fee rate automatically when invoices go overdue.
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