Vertical AI Micro-SaaS: Construction & Trades Accounting

Construction subcontractors — electricians, plumbers, HVAC crews — handle some of the most specialized accounting in any industry. AIA progress billing, certified payroll, job costing by phase, and Work-in-Progress schedules aren't optional extras; they're requirements for getting paid and staying compliant. Yet the tools available to them are either $200+/month enterprise packages built for general contractors, or generic small-business accounting that can't generate a G702 form. This micro-SaaS unifies job costing, AIA billing, and WIP reporting in one cloud platform priced at $20–50/month, specifically for trade subcontractors with under 20 employees. The construction accounting software market sits at $2.7B and is growing at 6.9% annually, while construction remains the least-digitized industry in the U.S. AI handles the painful parts: auto-categorizing expenses from receipt photos, pre-filling AIA billing from timesheets and purchase orders, and flagging WIP anomalies before they become cash flow problems. No existing competitor delivers this combination at a price subs can actually afford.