Why E-Invoicing Accuracy Matters in 2025
E-Invoicing has become essential to digital taxation and business transparency in Malaysia. It’s no longer just about meeting compliance requirements.
As the Inland Revenue Board of Malaysia (LHDN/IRBM) brings in e-invoicing for all taxpayers by July 2025, mistakes during rollout can lead to big problems:
- Invoices not accepted
- Payments held up
- Possible fines for non-compliance
If you’re a small business using the MyInvois portal or a big company connecting through API knowing and steering clear of these usual slip-ups will help your e-invoicing launch run without a hitch.
A Quick Look at Malaysia’s E-Invoicing System
LHDN brought in the MyInvois System to update tax compliance and digital reporting.
Key Implementation Timeline (as of 2025)
| Business Type | Go-Live Date |
| Large taxpayers (≥ RM100m turnover) | 1 Aug 2024 |
| Medium taxpayers (≥ RM25m–RM100m) | 1 Jan 2025 |
| All remaining taxpayers (SMEs, microbusinesses, individuals) | 1 July 2025 |
These dates mark when Malaysian businesses must start issuing e-invoices for B2B, B2C, and B2G transactions through:
- MyInvois Portal (manual entry) – LHDN provides this interface at no cost
- API/Peppol Integration – This allows direct submission from ERP or billing software
All invoices need to include the Tax Identification Number (TIN) and get LHDN’s approval before reaching the buyer.
How E-Invoicing Works
1. Creating Invoices
Companies make invoices using the MyInvois portal or their own ERP/HRMS/Accounting system (API link).
2. LHDN (IRBM) Checks
The invoice goes to IRBM’s checking system. It looks at:
- XML/JSON format
- Supplier & buyer TINs
- Invoice number style and totals
After approval, LHDN gives a Validation Code and QR code showing it’s real.
3. Sending Invoice to Buyer
The supplier adds the validation QR code to the invoice and sends it to the buyer. The QR has a link to LHDN’s MyInvois database for checking.
4. Keeping & Storing
Companies need to keep verified e-invoices for at least 7 years, in digital or paper form.
5. Time to Say No or Cancel
- Buyer says no: Within 72 hours of getting the invoice
- Supplier cancels: Within 72 hours after checking
After these times, changes need a credit or debit note.\
Common Mistakes in Setting Up E-Invoicing
Even companies that plan well see rejections or cancellations in their first e-invoicing round. Here are the main reasons why.
1. Structural Non-Compliance (XML/JSON Errors)
API-submitted e-invoices must follow LHDN’s prescribed XML or JSON schema.
Your invoice file will face automatic rejection by the MyInvois system if it has an incorrect hierarchy, format, or missing tags.
Fix: Make sure your ERP or e-invoicing software sticks to the latest LHDN JSON schema version and checks data before submission.
2. Missing or Incorrect TIN (Tax Identification Number)
Each e-invoice needs to have valid TINs for both supplier and buyer.
Common mistakes include:
- Typo in the TIN (wrong number or format)
- Using company registration numbers in place of TINs
- No TIN for foreign buyers (B2B international situations)
Solution: Use your e-invoicing software to check TINs or verify them through MyInvois Portal > TIN Verification Tool.
3. QR Code Problems
LHDN creates a QR code specific to each invoice after validation.
Issues that cause rejection include:
- Wrong or out-of-date QR code included
- No QR code in buyer’s copy
- Changing QR code data by hand
Fix: Use the QR code that LHDN’s system validates — don’t make or change it yourself.
4. Wrong Tax or Currency Codes
When dealing with transactions across borders or bills in multiple currencies, people often enter the wrong tax type or currency code.
Examples:
- Using “MYR” when the transaction is in USD
- Picking the incorrect SST or zero-rated tax code
- Not including foreign exchange rates
Fix: Make sure your system updates on its own with LHDN’s master data codes for tax type, currency, and country fields.
5. Invoice Numbers That Repeat
If someone uploads an invoice with the same invoice number and supplier TIN again, MyInvois will turn it down.
This happens often when businesses upload rejected invoices again without changing invoice numbers.
Solution: Set up internal invoice numbering checks in your HRMS/Accounting system to stop duplicates.
6. Buyer Information That’s Not Complete or Correct
Invoices that don’t have required fields like buyer name, address, or email will get turned down.
Solution: Use templates that are already filled out from your ERP or e-invoicing system to make sure customer data fields stay the same.
How to Steer Clear of E-Invoicing Mistakes in Malaysia
1. Teach Your Finance & HR Teams
Make sure all billing and accounting staff know about:
- LHDN’s newest e-invoicing rules
- Checks for valid data and reasons for rejection
- When to submit MyInvois
Training often stops data entry errors and helps follow the rules.
2. Use a Peppol-Ready System to Do the Work
Don’t enter data by hand. Pick an e-invoicing program with APIs that works with your accounting and HRMS systems.
Benefits of Automation:
- Checks invoices right away
- Makes XML/JSON in the right format
- No double entries
- Adds TIN and QR codes without extra work
Our Peppol-Ready E-Invoicing Software connects straight to LHDN’s MyInvois platform. This makes sure every invoice passes validation checks right away.
3. Check Buyer Info Before You Send
Before you send an invoice double-check key details with your customer. Pay close attention to their TIN, address, and tax status.
This quick check helps avoid costly rejections and builds trust between you and your clients.
4. Pick a Good ERP or Accounting Tool
Your ERP or accounting system should:
- Sync invoice data on its own
- Create reports to track compliance
- Store records for 7 years ready for audits
When your systems work together (HR, accounting, invoicing), you can stay compliant without extra paperwork.
Team Up with for Flawless E-Invoicing
Setting up Malaysia’s e-invoicing system can be straightforward.
As a Peppol-Ready Solution Provider (PRSP), our software helps businesses of all sizes switch over with:
- Automatic invoice creation & checking
- Built-in TIN & QR checks
- Quick submission to MyInvois
- Links to HRMS, Payroll & Accounting modules
- LHDN-approved audit trail & document storage
Our cloud software lets you create, follow, and store e-invoices from any device — safely and following all rules.
Last Thoughts
E-Invoicing marks a big step towards tax clarity and digital change in Malaysia.
Steering clear of common mistakes — from structure problems to missing QR codes — is crucial to avoid rejections and fines.
With the right tools and training, companies can turn e-invoicing compliance into a business edge — boosting accuracy, productivity, and confidence.