Wisconsin Sales and Use Tax on Materials: In Wisconsin a contractor performing real property construction is generally the consumer of the materials it furnishes and installs, so sales tax is paid to the supplier at purchase rather than charged on the improvement. The distinction that catches people is tangible personal property that keeps its character as personal property after installation, where the contractor is acting as a retailer on that item. The combined rate in Madison is 5.5 percent, being 5 percent Wisconsin state tax plus the 0.5 percent Dane County tax. Where a supplier bills without tax, Wisconsin use tax is owed and must be accrued at bill entry.
The Section 77.54(9m) Exempt Entity Exemption: Wisconsin Statute 77.54(9m) exempts building materials sold to a construction contractor where the materials are transferred to a qualifying exempt entity and become part of a facility in Wisconsin owned by that entity, which covers a large share of University of Wisconsin, State of Wisconsin, City of Madison, Dane County and school district work. The contractor claims it by providing Form S-211 to the supplier noting the exemption under section 77.54(9m). A facility does not include a highway, street or road. Because the same item is exempt on one job and taxable on the next, this belongs in the purchasing and coding workflow rather than in a year-end adjustment.
Prevailing Wage and Certified Payroll: Wisconsin repealed its state prevailing wage law covering state and local public works, so prevailing wage exposure for a Madison contractor now comes primarily from the federal Davis-Bacon Act and the Davis-Bacon Related Acts on federally funded work. In this market that means transit and airport projects, HUD-assisted housing, and federally funded construction on the University of Wisconsin campus. Where it applies, certified payroll is a weekly record keeping obligation, typically on Form WH-347 with a Copeland Act statement of compliance. The filed payroll and the labor cost sitting on the job have to agree, which is why we produce both from one payroll run.
Dwelling Contractor Certification and Renewal Costs: Residential builders and remodelers in Wisconsin need a Dwelling Contractor Certification for the business and a Dwelling Contractor Qualifier credential held by an individual, both administered by the Department of Safety and Professional Services. Renewal of the qualifier credential requires 12 hours of approved continuing education every two years, and since November 2022 four of those hours must cover construction laws, codes, contracts, liability and risk management. Those renewal fees, course costs, City of Madison permit fees, bond premiums and insurance belong in overhead where they feed your burden rate, not scattered across job expense where they distort job margin.
Worker Classification under Wisconsin Statute 103.06: Wisconsin Statute 103.06 authorises the Department of Workforce Development to conduct worker classification compliance investigations at construction worksites and to issue stop-work orders, with a daily forfeiture for violating an order. That makes the 1099 versus W-2 question an operational risk in construction specifically, not just a tax filing question. We treat it as a bookkeeping control: no subcontractor gets paid without a W-9, a current certificate of insurance and a signed agreement in the vendor record, and labor-only vendors are flagged for review rather than discovered in January.
Wisconsin Construction Lien Law and Payment Terms: Chapter 779 of the Wisconsin Statutes governs construction lien rights, and the deadlines run from dates your records have to be able to prove, in particular the last date labor or materials were furnished on each project. Wisconsin Statute 779.135(3) also voids provisions making an owner's payment to a prime contractor a condition precedent to paying a subcontractor, so a pay-if-paid clause is unenforceable here while pay-when-paid timing is not. We are not attorneys and we do not file notices. We keep unpaid balances organized by job with accurate furnishing dates so your attorney is working from records rather than from memory.
Retainage as Its Own Receivable: Retainage on Madison institutional and public work is commonly held for months after substantial completion, and if it is entered as part of an ordinary receivable it stops being visible the moment the job goes quiet. We post the withheld portion of every pay application to a separate retainage receivable by contract, note the release condition, and mirror the treatment for retainage you hold from subcontractors. That produces a real retainage aging and keeps your balance sheet from overstating what is actually collectible in the next 30 days.