# AP automation built for construction accounting > AI agents for construction AP: job-cost coding, 2-way and 3-way matching, pay app review, and lien waiver checks in NetSuite, Sage Intacct, or QuickBooks. - Canonical page: https://procindex.com/construction ProcIndex agents code every bill to the right job and cost code, match it to the commitment, check pay applications and lien waivers, and route approvals to the project manager who owns the job. Your team reviews exceptions instead of keying invoices. **98.1%** of invoices processed without human intervention. Invoices processed without human intervention, across all customers, January–October 2026. ## What ProcIndex handles - Codes bills to job, phase, and cost code from the PO, commitment, and vendor history - Matches invoices and pay applications against commitments and prior billing - Checks lien waivers against the draw they cover before payment - Routes approvals to project managers and answers subcontractor status questions ## Workflows ### Job-cost coding Suggests job, phase, cost code, and cost type from the PO, the commitment, and how this vendor has been coded before. ### Commitments and partial invoices 2-way and 3-way matching against POs, subcontracts, and receipts, with partial billings tracked against what remains open. ### Pay application review Checks the schedule of values, prior billing, retainage, and remaining commitment on each draw before approval. ### Lien waivers before payment Matches each waiver to the claimant, job, and through date of the payment, and holds the check until it is right. ## Where construction AP breaks A general contractor’s AP team isn’t slowed down by typing. It is slowed down by context: which job a bill belongs to, whether the subcontract has room left, whether the change order was approved, whether this month’s waiver is on file, and which PM has to sign off. Generic AP automation reads the invoice and stops there. ProcIndex works from the job, the commitment, and the payment, which is where construction exceptions actually live. ## What changes for your team - Bills arrive coded to job and cost code, with the commitment and remaining balance attached - Pay applications arrive checked: schedule of values, prior billing, retainage, stored materials - Payments with a missing or mismatched lien waiver are held with the reason visible - Project managers approve from one queue with the invoice, PO, and variance in front of them - Subcontractors asking “where’s my payment?” get an answer from live AP data ## Retainage, change orders, and draws Retainage is held on each draw and tracked to release, so it doesn’t disappear into aging. Change orders are only billed against once approved, and partial billings are matched against what remains on the commitment. For the method behind each check, see the guides on pay applications, retainage, and lien waivers below. ## Roofing and specialty contractors Roofing, mechanical, electrical, and other specialty contractors run the same AP problems at a faster pace: many small jobs, materials bought per job from a handful of suppliers, equipment rentals, and crews or subs paid against short schedules. Getting each bill to the right job, and catching supplier invoices that bill more than was delivered, matters more than on a single large project. ProcIndex codes each supplier bill to the job from the PO or delivery address, matches it to what was ordered and received, and checks subcontractor waivers before payment, so job costs stay current between jobs instead of being cleaned up at month-end. ## Connected to your ERP ProcIndex connects to NetSuite, Sage Intacct, and QuickBooks. Your ERP stays the system of record: coding, approvals, and postings land there, with the evidence behind each one kept in the audit trail. ## What customers say > Before ProcIndex, our team started every day in inboxes, portals, and approval follow-ups. Now invoices are captured, matched, and coded before anyone logs in, and the team can focus on exceptions and close instead of manual work. > > CFO, $200M revenue company ## Questions ### What is the best AP automation software for construction? Look for software that codes to job and cost code, matches against subcontracts and commitments rather than only POs, reviews pay applications, and checks lien waivers before payment. ProcIndex does all four inside NetSuite, Sage Intacct, or QuickBooks. ### Can ProcIndex code invoices to jobs and cost codes? Yes. It suggests job, phase, cost code, and cost type from the PO or commitment and from how the vendor has been coded before. Anything uncertain goes to a reviewer instead of posting. ### Does it handle subcontractor pay applications? Yes. It checks each draw against the schedule of values, prior billing, retainage, and the remaining commitment, and pairs it with a lien waiver check before payment. ### Does it work with Sage 300 CRE, Vista, or CMiC? Not today. ProcIndex currently connects to NetSuite, Sage Intacct, and QuickBooks. If you run another construction ERP, talk to us about what is on the roadmap. ## Related guides - [Lien Waiver Agent](https://procindex.com/lien-waiver-agent): Check every waiver against the draw it covers and hold payments until it matches. - [Construction AP Automation: Job Costing, Commitments, and Retainage](https://procindex.com/blog/construction-ap-automation.md): How to automate construction AP without losing job-cost accuracy. - [Subcontractor Pay Applications and Change Orders](https://procindex.com/blog/subcontractor-pay-applications.md): A line-by-line review method for subcontractor draws. - [Construction Retainage: Track It From Holdback to Release](https://procindex.com/blog/construction-retainage.md): Hold, bill, and release retainage without losing it in aging. - [Pay Application and Retainage Calculator](https://procindex.com/tools/pay-application-calculator): Work out the current payment due, retainage held, and balance to finish. Book a walkthrough on your own ERP data: https://procindex.com/book-demo --- ProcIndex builds AI accounting agents for construction and manufacturing finance teams. The agents work inside the ERP, which stays the system of record, under the customer’s own approval and matching rules. ProcIndex currently connects to NetSuite, Sage Intacct, and QuickBooks.