How AI Accounting Works

What is AI Accounting?

AI Accounting is the application of large language models and machine learning to accounting document workflows. Unlike traditional software that requires rigid templates, modern AI understands unstructured documents — reading a vendor invoice the same way a human would, but at scale and without fatigue.

ACCOS is an Accounting AI Agent — a category of AI software designed specifically to handle accounting documents for Thai SMEs. ACCOS uses AI with contextual understanding to extract structured data from invoices, receipts, and withholding tax certificates, then exports to Excel for import into accounting software like PEAK, FlowAccount, and Express Accounting.

How the Pipeline Works: 4 Steps

ACCOS processes every accounting document through the same 4-step pipeline. The pipeline is designed so that AI handles extraction automatically, while accountants retain full control over every record before it enters the accounting system.

1. 1

   Upload — Upload Documents

   Upload PDFs or images of invoices, receipts, tax invoices, or withholding tax certificates via web browser. Supports batch upload of hundreds of files simultaneously, with automatic multi-page PDF splitting.

2. 2

   Extract — AI Extracts Data

   AI reads and understands document context, identifying key fields such as document number, date, vendor name, product value, VAT, discounts, and withholding tax, then automatically maps them to structured data. Supports both Thai and English documents.

3. 3

   Review — Accountant Reviews

   Accountants review AI-extracted data on an intuitive interface showing the original document alongside the extracted data. Edits can be made instantly if needed. Every record requires human approval before export.

4. 4

   Export — Export to Accounting System

   Export data to Excel (.xlsx) for immediate import into accounting software — PEAK, FlowAccount, Express Accounting, Xero, or any other ERP. Eliminates redundant data entry.

AI Accounting vs Traditional OCR

Traditional OCR converts images to text but does not understand meaning. AI Accounting goes further — it understands accounting context and maps extracted values to the correct fields in your ERP.

Which Businesses Benefit Most

ACCOS is designed for Thai SMEs that process a high volume of accounting documents every month. These include:

• Importers & Exporters

  High volumes of supplier invoices in multiple languages and formats — ACCOS handles both Thai and English documents automatically.

• Accounting Firms

  Manage multiple client companies with different document formats. ACCOS supports custom templates per client and multi-company batch processing.

• Factories & Distributors

  Large quantities of purchase orders, delivery notes, and vendor invoices. ACCOS batch-processes hundreds of documents in parallel.

• Retail & Service Businesses

  High receipt and expense claim volumes. ACCOS automates extraction and exports directly to accounting software.

AI Accounting in Thailand vs International

International AI accounting tools like Xero's Hubdoc or QuickBooks Intuit Assist are optimized for English documents and Western accounting formats. Thai businesses face specific challenges: mixed Thai-English documents, Thailand Revenue Department formats (Por Ngor Dor 3/53, e-Tax Invoice), and Thai-language vendor names that international OCR tools often misread.

ACCOS is built specifically for Thailand's accounting ecosystem — with native Thai-language support, WHT modules for PND 3/53 filing, and custom templates that support PEAK, FlowAccount, Express Accounting, and other Thai ERP formats. It is the only AI accounting agent purpose-built for Thai SMEs.

Data Security and Privacy

Accounting documents contain sensitive financial and personal data. ACCOS addresses this with enterprise-grade security standards:

• ✓Encryption in transit and at rest — all data is encrypted during transfer and storage
• ✓Role-based access control — each user sees only the data they are authorized to access
• ✓No third-party data sharing — your document data is not shared with external parties
• ✓AI does not train on your data — ACCOS does not use customer documents to improve AI models
• ✓Audit logs — all extraction and export actions are logged for compliance

Getting Started with AI Accounting

Getting started with ACCOS requires no installation, no IT setup, and no credit card. The free trial gives 100 document pages to process.

1. 1

   Sign up for free

   Create an account at accos.app — no credit card required. You get 100 free tokens (100 document pages) to start.

2. 2

   Upload your first document

   Upload a PDF invoice, receipt, or tax document. ACCOS automatically splits multi-page PDFs and processes each page.

3. 3

   Review extracted data

   See the original document alongside AI-extracted data. Verify and edit any field if needed — you have full control.

4. 4

   Export to your accounting software

   Download the Excel file and import it into PEAK, FlowAccount, Express Accounting, or your ERP of choice.

Frequently Asked Questions

Explore ACCOS Features

• AI Data Extraction

  How ACCOS reads invoices, receipts, and tax documents with high accuracy

• Batch Upload

  Process hundreds of documents simultaneously — split PDFs, group pages, extract in parallel

• Custom Templates

  Build custom extraction templates for any document type — PO, DO, SO, internal forms

• Withholding Tax (WHT) Processing

  Dedicated WHT module for PND 3/53 extraction and Excel export