# What is an approval workflow? > An approval workflow routes a request to the right person to approve before anything happens. Where AI fits in one, and where a person must decide. Source: https://learn.ynteractive.com/content/glossary/approval-workflow · Updated 2026-10-01 · Free from Stepthrough (https://learn.ynteractive.com) [Business](https://learn.ynteractive.com/content/glossary#topic-business) · [AI glossary](https://learn.ynteractive.com/content/glossary) Updated October 1, 2026 · By [Robert Breen](https://learn.ynteractive.com/content/about) An approval workflow is a set path a request follows before it is acted on: it is submitted, checked, approved or sent back, then carried out. Automation moves the request along and does the routine checks; the approval itself stays with a named person whenever money, risk or judgment is involved. ## Why it matters for a small business Every business has approvals, even if they live in someone's head: purchases over a certain amount, refunds, client letters, time off. When the path isn't written down, requests stall in inboxes, get approved by the wrong person or skip approval entirely. Writing the steps down and automating the hand-offs makes the process faster and more consistent. AI fits in one specific place: the pre-check. It can read a request, compare it with the written rules and say what is missing or who needs to sign off. That saves the approver from sorting out incomplete requests. What it shouldn't do is give final approval on anything with real consequences. A good design says plainly which outcomes the AI may set and which it only recommends. ## In a real lesson: Build an Expense Reimbursement Form With AI Policy Checks The [AI Expense Reimbursement Form lesson](https://learn.ynteractive.com/content/expense-reimbursement-form-ai-approval-lovable-n8n) builds the first stages of one for Maple Street Bookkeeping, a made-up bookkeeping firm. Employees submit name, email, expense details and amount through a Lovable form, and the request reaches an n8n AI agent through a webhook. The agent applies the firm's written policy and gives each request one of three outcomes. A request without a receipt goes back to the employee. One for $100 or more is routed to a manager, because the agent may not approve it. Only a small, documented expense with a clear business purpose is marked approved. The request is logged to the **Expense Requests** sheet and the employee gets an email saying where it stands and what to do next. In the test, the employee says the receipt is missing, so the request is sent back with instructions. The policy, the $100 line and the final payment all stay with people; the agent just keeps requests moving and complete. [Try this lesson free](https://learn.ynteractive.com/modules/lovable-n8n-finance) or [read the step-by-step guide](https://learn.ynteractive.com/content/expense-reimbursement-form-ai-approval-lovable-n8n). ## Common confusions ### Approval workflow vs human in the loop [Human in the loop](https://learn.ynteractive.com/content/glossary/human-in-the-loop) is the general idea of a person reviewing AI output. An approval workflow is a defined business process with steps, approvers and thresholds, which may or may not involve AI. ### Approval workflow vs escalation Approval is a planned checkpoint every qualifying request passes through. [Escalation](https://learn.ynteractive.com/content/glossary/escalation) is an exception path for unusual or urgent cases. ## Tips - Write each rule as a threshold or a yes/no question, like "$100 or more needs a manager". - Log every decision with who or what made it. - Have your accountant or CPA review the policy itself; the AI only applies what you give it. ## Related terms [Expense reimbursement](https://learn.ynteractive.com/content/glossary/expense-reimbursement) · [Human in the loop](https://learn.ynteractive.com/content/glossary/human-in-the-loop) · [Audit trail](https://learn.ynteractive.com/content/glossary/audit-trail) · [Guardrails](https://learn.ynteractive.com/content/glossary/guardrails) · [Purchase order](https://learn.ynteractive.com/content/glossary/purchase-order) · [Escalation (handing off to a person)](https://learn.ynteractive.com/content/glossary/escalation) ## Where you use it: free lessons - [Build an Expense Reimbursement Form With AI Policy Checks](https://learn.ynteractive.com/content/expense-reimbursement-form-ai-approval-lovable-n8n) (Lovable and n8n, 15 min) - [AI Email Responder: Draft Gmail Replies Automatically with n8n](https://learn.ynteractive.com/content/ai-email-responder-gmail-drafts-n8n) (n8n, 12 min) - [Reply Faster to a Client Asking for a Case Update: ChatGPT for Small Law Firms](https://learn.ynteractive.com/content/chatgpt-client-case-update-email-law-firm) (ChatGPT, 10 min) ## More free tutorials [AI for Finance](https://learn.ynteractive.com/content/industry/finance) ## Frequently asked questions **Can AI approve expenses?** It can check requests against a written policy and mark simple, low-value ones that meet every rule. Anything over your threshold, unusual or involving tax questions should go to a person, and a person still makes the payment. **What are the steps in an approval workflow?** Submit, check against the rules, route to the right approver, approve or send back with a reason, then act and record the outcome. [All AI glossary terms, A to Z](https://learn.ynteractive.com/content/glossary) · [Free prompt templates](https://learn.ynteractive.com/content/prompts)