You will get an AI invoice processing workflow with n8n automation
Project details
Manual invoice processing is time-consuming and increases the risk of duplicate payments and data entry errors.
I will build a custom AI-powered invoice automation that captures incoming invoices, extracts key information from PDF files, detects duplicate invoices, and routes them based on your business rules.
The workflow can automatically log invoice data to Google Sheets, send notifications for high-value invoices, apply Gmail labels, and reduce repetitive accounting tasks.
Built with n8n, OpenAI, Gmail, and Google Sheets, the automation is fully customized to fit your workflow and thoroughly tested before delivery.
What's included:
• AI invoice data extraction
• Duplicate invoice detection
• Smart routing & notifications
• Google Sheets integration
• Gmail automation
• Custom workflow setup
• Testing before delivery
Monthly maintenance and future workflow improvements are also available if needed.
I will build a custom AI-powered invoice automation that captures incoming invoices, extracts key information from PDF files, detects duplicate invoices, and routes them based on your business rules.
The workflow can automatically log invoice data to Google Sheets, send notifications for high-value invoices, apply Gmail labels, and reduce repetitive accounting tasks.
Built with n8n, OpenAI, Gmail, and Google Sheets, the automation is fully customized to fit your workflow and thoroughly tested before delivery.
What's included:
• AI invoice data extraction
• Duplicate invoice detection
• Smart routing & notifications
• Google Sheets integration
• Gmail automation
• Custom workflow setup
• Testing before delivery
Monthly maintenance and future workflow improvements are also available if needed.
AI Algorithms
Large Language Model, Multimodal Large Language Model, Transformer ModelAI Applications
AI-Enhanced Classification, Natural Language Understanding, Text RecognitionAI Models
ChatGPT, GPT-4What's included
| Service Tiers |
Starter
$75
|
Standard
$150
|
Advanced
$300
|
|---|---|---|---|
| Delivery Time | 3 days | 5 days | 7 days |
Number of Revisions | 1 | 2 | 3 |
AI Model Integration | |||
Batch Normalization | - | - | - |
Database Integration | - | ||
Detailed Code Comments | - | - | - |
Image Upscaling | - | - | - |
MLOps | - | - | - |
Model Deployment | - | - | - |
Model Documentation | - | ||
Model Monitoring | - | - | |
Model Testing & Optimization | |||
Model Tuning | - | - | - |
Natural Language Processing | |||
NLP Tokenization | - | - | - |
Pre-Training | - | - | - |
Prompt Engineering | |||
Setup File | |||
Source Code |
Optional add-ons
You can add these on the next page.
Additional Revision
+$25
Monthly Workflow Maintenance
+$99
Additional Integration
(+ 2 Days)
+$50
Custom Business Rules
(+ 2 Days)
+$75Frequently asked questions
1 review
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JB
Jonathan B.
Feb 2, 2026
Three newsletter illustrations
Highly recommended. I've been working with Nikola for six months (since before he joined Upwork) on illustrations for my weekly newsletter , www.platformocracy.com. He is consistently professional, fast, high-quality, and original. I enjoy working with him and appreciate his talent.
About Nikola
AI Automation & n8n Specialist | OpenAI Integrations | Illustrator
Futog, Serbia - 1:07 pm local time
My current focus includes:
• AI Chatbots for websites
• OpenAI integrations
• RAG (Retrieval-Augmented Generation) systems
• Knowledge base assistants
• Lead capture and qualification workflows
• Gmail, Google Sheets, and Google Drive automations
• Telegram and multi-channel AI assistants
• Custom n8n workflow development
In addition to automation, I have over 15 years of experience as a professional illustrator and designer, working with international clients under the artistic name Chaos Theory.
My creative background helps me build AI solutions that are user-friendly, visually aligned with a brand, and focused on customer experience.
I'm reliable, communicative, and focused on delivering practical solutions that save time, improve customer support, and streamline business operations.
Steps for completing your project
After purchasing the project, send requirements so Nikola can start the project.
Delivery time starts when Nikola receives requirements from you.
Nikola works on your project following the steps below.
Revisions may occur after the delivery date.
Review Your Requirements
I'll review your invoice workflow, business rules, and sample invoices to understand exactly how your automation should work.
Build the AI Workflow
I'll create your AI-powered invoice automation, including data extraction, duplicate detection, routing, and integrations.