Tax Identification Number (TIN)

A Tax Identification Number (TIN), known in Malay as Nombor Pengenalan Cukai (NPC), is a unique identifier assigned by LHDN to every registered taxpayer in Malaysia. The TIN is a foundational element of the e-invoicing system because it allows LHDN to definitively link every invoice to the issuing and receiving taxpayers, enabling automated tax reconciliation and audit. Without a valid TIN, an invoice cannot be successfully validated through MyInvois.

How TINs are structured depends on the taxpayer category. For companies registered under the Companies Commission of Malaysia (SSM), the TIN typically follows a format beginning with "C" followed by digits. For individuals — including sole proprietors and individual taxpayers — the TIN begins with different prefixes such as "SG" or "OG" depending on residency and tax status. Partnerships, co-operatives, and other entities have their own TIN prefixes. LHDN issues TINs automatically to registered taxpayers; businesses that have been filing income tax already have a TIN.

Why is the TIN required on every invoice? Under LHDN's e-invoicing guidelines, the supplier's TIN is mandatory on all invoices, and the buyer's TIN is mandatory for B2B transactions. This allows MyInvois to match the supplier's output tax records with the buyer's input tax records, creating an end-to-end audit trail. For B2C transactions where the buyer is an individual consumer, the buyer's TIN or MyKad/passport number can be used instead in some simplified invoice scenarios.

Obtaining a TIN as a new business is straightforward. Companies incorporated via SSM are automatically assigned a TIN, which can be found on LHDN's MyTax portal after first-time registration. Individuals can find their TIN by logging into e-Filing (efiling.hasil.gov.my) or by calling LHDN's customer service. For foreign entities doing business in Malaysia, TINs are available upon registration with LHDN's International Tax department.

One common challenge in the e-invoicing rollout has been businesses unable to obtain their buyers' TINs, particularly for B2B transactions with smaller local suppliers or individual contractors. LHDN's guidance permits the use of alternative identifiers (such as business registration number or MyKad number) in certain cases where a TIN cannot be obtained, but businesses should make every reasonable effort to collect TINs from their trading partners before their compliance deadline.