Fresh 2026

Create purchase orders

How to create purchase orders in customer ERP/accounting platforms and track billing using the Merge Accounting API.

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You have already followed the "Sync Customers or Suppliers" use case to ensure the vendors across your database and your customer's accounting/ERP system are in sync.

You'll have to specify a general ledger account or item on each line item of the purchase order. We suggest keeping this data in sync by storing the data in the GET /accounts and GET /items endpoints.

Identify when to send Purchase Orders to your customer's accounting platform. This could be a button or form within your app's frontend or event-based logic built within your backend.

Submit a POST /purchase-order request to create the purchase order in your customer's Accounting platform.

Utilize the GET /Invoices endpoint to follow the purchase order through the billing process. Once billed, an invoice will exist with a reference to the created purchase order through the purchase_orders field.

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