Key Points of Internal Control System

Invoices are among the most critical documents in business operations and serve as the primary evidence for tax audits. With the comprehensive upgrade of the Golden Tax Phase IV system, the standardization of invoice management directly impacts your enterprise's tax security. This article systematically outlines key aspects of invoice management to help businesses establish robust control systems.

Why Invoice Management Matters

Invoices are not only the foundation for cost accounting and profit calculation, but also a crucial tool for tax authorities to monitor tax compliance. In the VAT deduction chain, invoice information from upstream and downstream enterprises is collected and compared in real-time by the tax system. Any anomalies may trigger risk warnings.

Non-standard invoice management exposes businesses to comprehensive risks:

• VAT deduction risk: Non-compliant invoices cannot be used for input tax credits, directly increasing tax burden
• Pre-tax deduction risk: Non-compliant expenses cannot be deducted before tax, requiring additional tax payments
• Criminal liability: Fraudulent invoicing is a criminal offense under Article 205 of the Criminal Law

Invoice Issuance Standards

Standardized invoice issuance is key to controlling invoice risks at the source. Invoice issuance should follow the basic principles of "authenticity, completeness, and timeliness."

Basic Information Requirements

When issuing VAT invoices, buyer information must be complete and accurate. This includes:

• Enterprise name
• Unified Social Credit Code
• Address, phone number
• Bank name and account number

Since July 2017, buyers who are enterprises must provide their taxpayer identification number or unified social credit code when requesting VAT ordinary invoices.

Product/Service Classification Codes

Per the State Administration of Taxation requirements, taxpayers must use commodity and service tax classification codes when issuing invoices. Code selection errors lead to mismatches between items and tax rates, affecting downstream deductions.

Memo Field Requirements

Certain business types must include relevant information in the invoice memo field:

• Freight services: Origin, destination, vehicle type/number, cargo information
• Construction services: City/county where service occurs and project name
• Real estate leasing: Detailed property address
• Motor vehicle tax: Insurance policy number, collected amount, penalties, total

Invoice Verification Upon Receipt

Verification of received invoices cannot be overlooked. Finance personnel should establish robust verification mechanisms to prevent non-compliant invoices from entering the enterprise.

Formal Verification Points

When receiving invoices, first verify that invoice surface information is complete and clear:

• Invoice code and number match the invoice stamp information
• Invoice content is clear without alterations
• Amount and tax calculations are correct, uppercase matches lowercase
• Invoice stamp is clear and complete, name matches issuer

Substantive Verification Points

Formal verification is just the foundation—substantive verification is more important. Verify that the economic transaction recorded in the invoice actually occurred and matches contract terms. Be especially vigilant about:

• Large discrepancies between invoice amount and contract amount
• Invoice issuance date significantly different from transaction date
• Item descriptions don't match actual transaction content
• Seller differs from contract signing party
• Same supplier issues frequent large invoices in short periods

Invoice Authentication and Deduction

Authentication Period Rules

Per current regulations, VAT general taxpayers must authenticate eligible VAT special invoices within 360 days of issuance. Invoices exceeding this period cannot generally be used for input tax credits.

Non-Deductible Situations

Even with valid VAT special invoices, the following situations prohibit input tax credits:

• Items used for simplified tax calculation, tax-exempt projects, or employee welfare/personal consumption
• Abnormal losses of purchased goods and related transportation services
• Loan services, catering services, daily life services, and entertainment services
• Travel tickets with passenger identity information (when used for non-deductible items)

Lost Invoice Handling

Lost VAT Special Invoices

Per SAT Announcement No. 1 of 2020:

• If both invoice and deduction联 are lost: Use copy of invoice记账联 (stamped by seller) as credit voucher
• If only deduction联 is lost: Use copy of invoice联 as credit voucher
• If only invoice联 is lost: Use copy of invoice记账联 (stamped by seller) as credit voucher

Lost VAT Ordinary Invoices

Obtain a certificate stamped with the original issuer's official seal, including invoice number, amount, content, etc. After providing copies of handler ID and original, it can be used as accounting voucher.

Common Invoice Risk Points

1. Transaction Authenticity Risk

This is the core risk point. Some enterprises have a侥幸 mentality about "buying invoices for tax credits." In reality, tax authorities have established comprehensive invoice risk monitoring systems using big data analysis to identify mismatches between invoices and actual transactions.

2. Three-Flow Inconsistency Risk

Inconsistency between capital flow, invoice flow, and logistics/service flow is a key focus of tax audits. If payment party differs from invoice title without reasonable explanation, it may be deemed fraudulent.

3. Sensitive Industry Risks

Industries with historical invoice issues require special attention:

• Trading enterprises: Multiple trade varieties, frequent transactions，容易出现品名 mismatches
• HR enterprises: High personnel turnover, irregular labor service invoicing
• Consulting enterprises: Services hard to quantify, easy to fabricate costs
• Construction enterprises: Multiple subcontracting levels, long invoice chains

Summary

Invoice management is the foundation of enterprise tax management. Standardized invoice management not only helps enterprises avoid tax risks but also improves financial management levels and provides reliable data support for business decisions.

We recommend enterprises build comprehensive long-term invoice management mechanisms from three dimensions: system construction, personnel training, and system support.