Automatic E-Invoice Accounting with 3-Way Match on ERP Việt POS

Automatic electronic invoice (E-Invoice) accounting is a process that uses 3-way match technology to reconcile incoming invoices with purchase orders (PO) and goods received notes (GRN), thereby generating accounting entries without manual data entry. In Vietnam, mini-supermarket chains and F&B stores are implementing this solution to reduce reconciliation time by 60-80% and eliminate data entry errors.

#What is 3-way match on ERP Việt POS?

3-way match is an automatic reconciliation mechanism between three documents: incoming electronic invoice (Invoice), supplier purchase order (PO), and goods received note (GRN). The ERP Việt POS system checks for consistency in quantity, unit price, tax, and payment terms before generating accounting entries.

When receiving an E-Invoice from a supplier via the tax portal or email, the accounting module of Phần mềm quản lý cửa hàng vật liệu xây dựng — POS chuyên VLXD automatically extracts data, matches it with existing PO and GRN in the system. If 100% matched, the entry is generated automatically. If discrepancies exist, the system alerts and requires manual processing.

#How does the 3-way match process work?

The process consists of 4 main steps: receiving E-Invoices from multiple sources, extracting data via OCR, performing 3-way reconciliation with PO and GRN, and generating accounting entries. The entire process takes 2-5 minutes instead of 30-60 minutes if done manually.

1. Receive E-Invoice: The system automatically retrieves invoices from the tax portal, email, or manual upload.
2. Extract data: OCR reads information: tax code, invoice number, date, quantity, unit price, VAT.
3. 3-way reconciliation: Compare invoice data with PO and GRN. Check that quantity does not exceed PO, unit price deviation is not more than 5%, and tax rate matches.
4. Generate entry: If matched, the system automatically creates accounting documents (Debit account 152/156, Credit account 331) and updates supplier payable.

Example: a convenience store chain with 15 points of sale imports 200 cases of soft drinks. The system reconciles the supplier's E-Invoice with the approved PO and actual goods received note. If the invoice quantity is 210 cases, the system alerts the discrepancy and awaits confirmation.

#Measurable benefits of automatic E-Invoice accounting

Applying 3-way match helps enterprises reduce invoice processing time by 60-80%, eliminate 90% of manual data entry errors, and shorten the accounting closing cycle from 5-7 days to 1-2 days.

Metric	Before application	After application	Improvement level
Processing time per invoice	15-30 minutes	2-5 minutes	80% reduction
Data entry error rate	8-12%	<1%	90% reduction
Monthly closing time	5-7 days	1-2 days	70% reduction
Reconciliation labor cost	10-15 million VND/month	3-5 million VND/month	60% savings

For a chain of 20 stores processing 400-600 incoming invoices per month, cost savings can reach 100-150 million VND per year.

#Comparison of 3-way match with manual method

The manual method requires accountants to print invoices, compare with paper POs and goods received notes, and enter data into accounting software. 3-way match automates the entire process, reducing the risk of errors and fraud.

• Accuracy: Manual 88-92% vs automatic 99.5%+.
• Traceability: Manual depends on paper storage, easily lost. Automatic electronic storage, instant retrieval.
• Fraud control: 3-way match detects fake invoices, unit prices higher than agreed, and quantities exceeding limits.
• System integration: Automatically connects with POS sales, inventory management, and general accounting.

#Implementing 3-way match for retail and F&B enterprises

To implement, enterprises need to prepare supplier data, set reconciliation rules (allowable deviation thresholds), and train accountants. Average implementation time is 2-4 weeks for a chain of 10-30 points of sale.

Specific steps:

1. Synchronize supplier list and purchase contracts to ERP.
2. Set 3-way match rules: quantity tolerance ±5%, unit price ±3%, tax rate must match.
3. Connect to tax portal or configure email to receive E-Invoices automatically.
4. Run a trial with 50-100 invoices, adjust rules if needed.
5. Full transition, monitor for the first 1-2 accounting cycles.

Some notes: ensure PO and GRN data is entered completely and accurately. If the supplier does not have E-Invoices, paper invoices can be entered manually and reconciled semi-automatically.

#Case study: Organic food store chain reduces reconciliation time by 70%

A chain of 12 organic food stores in Ho Chi Minh City used to spend 3-4 days each month reconciling 350-400 incoming invoices. After implementing 3-way match on ERP Việt POS, the time was reduced to 1 day, saving 8 million VND/month in labor costs.

Detailed results:

• Processing time per invoice from 25 minutes to 4 minutes.
• Data entry error rate reduced from 10% to 0.5%.
• Detected 3 cases of suppliers issuing invoices with incorrect unit prices, recovering 12 million VND.
• Closing cycle shortened from 7 days to 2 days.

#Frequently asked questions

The automatic E-Invoice accounting solution with 3-way match is being implemented for over 200 retail and F&B enterprises nationwide. Contact 0905 295 337 now for a consultation on an implementation roadmap suitable for your scale and industry.