Construction Job-Costing Platform
Construction · Multifamily & Commercial
2025
enterprise
What they needed
The business runs commercial and multifamily construction projects across a dozen active job sites at any time. Job costs lived in a mix of spreadsheets, email threads, and an accounting package that couldn't track cost codes below the project level, so budget overruns often surfaced weeks after they happened. Progress billing was worse: preparing AIA G702/G703 pay applications took a project manager up to two weeks per project, manually matching percent-complete estimates to subcontractor invoices. Subcontractors routinely waited 30-45 days for payment after work was verified, straining relationships with trade partners the business depended on for repeat bids. Finance had no single view of committed versus actual costs across the portfolio, which made cash flow forecasting mostly guesswork.
What we built
Prixelo built a job costing and billing platform on Next.js and Node.js, with PostgreSQL modeling cost codes, commitments, and actuals at the line-item level for every active project. Project managers log commitments and change orders as they happen, so budget-to-actual variance updates in real time instead of at month-end. A billing module generates AIA G702/G703-style pay applications directly from the job cost ledger, auto-populating percent-complete and retainage instead of a manual spreadsheet rebuild. Once an owner approves a pay application, the platform triggers subcontractor payouts through Stripe Connect, holding retainage per contract terms and releasing it automatically on milestone sign-off. The system runs on AWS (RDS for Postgres, ECS for the Node.js services), with role-based access scoped per project for PMs and subcontractors, and portfolio-wide visibility for finance and leadership.
How we approached it
Modeled cost codes, commitments, and change orders in PostgreSQL at the line-item level, so budget-to-actual variance updates in real time instead of at month-end close.
Built an AIA G702/G703-style pay application generator in Next.js that pulls percent-complete and retainage straight from the job cost ledger, removing manual spreadsheet rebuilds.
Wired approved pay applications to Stripe Connect for subcontractor payouts, auto-holding retainage per contract terms and releasing it automatically on milestone sign-off.
Deployed on AWS (RDS for Postgres, ECS for the Node.js services) with project-scoped access for PMs and subcontractors, and portfolio-wide visibility for finance and leadership.
The impact
Faster AIA Pay Application Turnaround
Faster Subcontractor Payouts
Fewer Month-End Cost Discrepancies
"Pay applications used to take our estimator two weeks per project. Now a PM builds one in an afternoon, and our subs get paid within days of sign-off instead of a month later. Finance finally sees committed costs the same day they're entered."
CFO
Construction firm
Tell us what
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