How to File Annual Individual Tax Returns on Coretax; Late Filing Incurs Administrative Penalties

Many individuals remain uncertain about how to file their Annual Individual Tax Returns (SPT Tahunan Orang Pribadi) on Coretax in 2026. The filing deadline is 31 March 2026, with administrative penalties imposed for late submissions.

The Directorate General of Taxes (DJP) requires all taxpayers holding a Tax Identification Number (NPWP) to submit their Annual Tax Returns through Coretax beginning in 2026. “The introduction of Coretax is not merely a technical system update, but rather a fundamental restructuring of tax administration in Indonesia,” explained Irwan, as reported on 9 March 2026.

The key advantages of Coretax include real-time data validation, which mitigates audit risks. Filing Annual Tax Returns is relatively straightforward once the proper procedures are understood. Detailed instructions are available on the official tax website at pajak.go.id.