> This is Payabli documentation. For a complete page index, fetch https://docs.payabli.com/llms.txt — append .md to any page URL for lightweight markdown. For section-level indexes, query parameters, and other AI-optimized access methods, see https://docs.payabli.com/ai-agents.md

# Bills and invoices

> Understand the difference between bills and invoices in Payabli

Bills are for money out. Invoices are for money in.

**Invoices** are payment requests you send to customers. When a customer pays, money flows in. In accounting terms, invoices are your accounts receivable. [Manage invoices via API](/guides/pay-in-developer-invoices-manage) or [in the UI](/guides/pay-in-portal-invoices-manage).

**Bills** are records of vendor invoices. Creating a bill records what you owe — it's a record of money owed to a vendor, not a payment. You can pay a bill directly or route it through an approval workflow first. When you pay a bill, money flows out. In accounting terms, bills represent accounts payable. [Manage bills via API](/guides/pay-out-developer-bills-manage) or [in the UI](/guides/pay-out-portal-bills-manage).