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Automation project

Invoice Processing Automation

Extract invoice data with AI, validate it and post it to your accounting sheet.

Intermediate~5 hoursn8nOpenAIGmailGoogle Sheets

System workflow

  1. InputInvoice email
  2. AIAI extraction
  3. AutomationValidate + post
  4. OutputLedger updated

The problem

Finance teams re-type invoice details by hand, causing delays and errors.

The solution

Invoices arriving by email are parsed by an LLM into structured fields, validated against rules and written to the ledger — exceptions go to a reviewer.

Build steps

How you’ll build it

  1. 01

    Receive

    Watch a mailbox for new invoices.

  2. 02

    Extract

    Pull vendor, amounts, dates and GST fields as JSON.

  3. 03

    Validate

    Check totals, duplicates and required fields.

  4. 04

    Post

    Write to the ledger and flag exceptions.

Expected output

  • Email-triggered workflow
  • Extraction schema
  • Validation rules
  • Exception review queue

Tools

  • n8n
  • OpenAI
  • Gmail
  • Google Sheets

Skills you’ll learn

  • Document extraction
  • Data validation
  • Email automation

Build it in

Programs that include this project

  • BestsellerLive + Recorded

    AI Automation Mastery

    Build AI workflows with n8n, APIs and AI agents for real business use cases.

    • 12 weeks
    • 30+ projects
    • Intermediate
    • Certificate

    ₹14,999Original price ₹24,99940% off

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