Crews order material by phone and text, and someone keys it into Sage 100 Contractor days later. Field Materials moves the whole loop into one place — the crew raises the PO, the packing slip is photographed on delivery, and the invoice is matched against both before it posts. 90% less PO and invoice processing time.
Sage 100 Contractor is the accounting and project management system of record for thousands of small and mid-sized contractors. Field Materials integrates with Sage 100 to automate purchasing and AP data entry.

Best construction purchase order software

Best AP automation software for construction
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Field Materials AI communicates with Sage 100 through a connector that you install in your office network. Completely secure, no open ports.
Every invoice type, coded correctly
Because invoices clear in days rather than weeks, project managers see committed, received, invoiced, and paid costs against the Sage 100 budget while the job is still running — not after the period closes.
AP automation for Sage 100 Contractor is software that receives vendor invoices, matches them to Sage 100 purchase orders and delivery records, codes them to the right job and cost code, routes them for approval, and posts them into Sage 100 without manual data entry. Field Materials provides AP automation and purchase order approvals for Sage 100, handling the work before a transaction reaches your accounting system.
Sage 100 Contractor does not include AP automation and it does not capture delivery records from the field or check invoice lines against received quantities. Field Materials adds that layer. Crews photograph packing slips on delivery, each invoice line is matched against both the Sage 100 purchase order and what actually arrived, and only verified, coded records post to Sage 100.
Field Materials reads every line of the invoice, matches it to the Sage 100 purchase order, and applies the job, cost codes from that purchase order. Invoices with no PO are coded from the vendor's default or from past invoices, and a single invoice can be split across several cost codes or jobs. Project managers see committed and actual costs against the Sage 100 budget while the job is still running.
Yes — Field Materials matches each invoice line against both the Sage 100 purchase order price and the quantity actually delivered. Field crews photograph packing slips in the mobile app, which creates the received-quantity record. Price and quantity discrepancies are flagged before the invoice posts to Sage 100. This is a true three-way match, not a header-total check.
Yes. Field Materials supports connecting multiple companies within a single Sage 100 instance. You can assign users to specific Sage 100 companies, allowing each user to switch between the companies they have access to while working in Field Materials.
Yes. Field Materials controls who approves purchase orders and invoices before anything posts to Sage 100 Contractor, using role-based permissions and optional dollar thresholds.
Access control
Purchase orders
Invoices
For both, approvers are notified by email, text and in-app, and Field Materials keeps an audit trail of who requested and who approved. Settings can be changed at any time.
Field Materials matches your existing Sage 100 Contractor conventions rather than forcing new ones. Supported customizations include: