How Fiscal Years and Corporate Tax Deadlines Work in Indonesia

Indonesia normally treats the calendar year as the tax year, but a company may use a different accounting year. Its annual corporate income tax return is generally due four months after that tax year ends. Monthly tax filings keep their own deadlines, so a foreign parent should build its Indonesian calendar from the local company’s registered books and tax obligations.

Choose the Local Year Before Building the Tax Calendar

The Directorate General of Taxes (DJP) defines a tax year as a calendar year unless the taxpayer uses an accounting year that differs from it. For an established PT PMA, check the year-end used in the company’s books, its tax profile, and the period shown in Coretax. A foreign parent’s year-end is a separate group reporting decision.

For example, a January to December 2026 accounting year ends on 31 December 2026. A July 2026 to June 2027 year ends on 30 June 2027. The annual return deadline follows the end of the applicable Indonesian tax year, not the parent’s consolidation deadline. Confirm how the tax year is labelled in Coretax before filing, especially when the accounting period crosses calendar years.

DJP’s July 2025 guidance directs taxpayers to check the accounting period under their Coretax profile and contact Kring Pajak or the tax office if the displayed period is wrong. Our guide to accounting standards for PT PMA companies covers the separate choice of financial reporting framework.

Calculate the Annual Corporate Return Deadline

DJP states that a corporate annual income tax return is due no later than four months after the tax year ends. A tax year ending 31 December 2026 therefore normally has a 30 April 2027 filing deadline. A year ending 30 June 2027 normally points to 31 October 2027. These are calculations from the general rule; check any later official adjustment before relying on a date.

DJP requires annual income tax returns for tax year 2025 onward to be filed through Coretax. Our guide to filing a PT PMA corporate return in Coretax covers preparation, submission, and the electronic receipt. The current guide focuses on selecting the right period and deadline.

If the return cannot be ready by the normal deadline, DJP provides a formal extension notification route for up to two months. The notification and supporting documents must be handled under the applicable procedure before the ordinary deadline. An extension of filing time should not be treated as an automatic extension of any tax payment due.

Keep Monthly Taxes on Their Own Schedule

A non-calendar accounting year does not move every monthly tax deadline. DJP’s Coretaxpedia summary, last updated 17 September 2025, gives a general payment date of the 15th of the following month and a general filing date of the 20th for income tax. It gives the end of the following month for VAT payment and filing. The summary expressly notes exceptions.

Map the company’s actual withholding duties and VAT registration to each tax period before putting dates in a calendar. Our guide to PT PMA tax obligations separates the types of tax that may apply. Our Coretax compliance checklist covers access, records, and review controls. Tax rates and calculations are a different decision, addressed in our corporate income tax guide.

Handle a Change of Accounting Year as a Formal Tax Decision

DJP’s guidance for a first change to the tax accounting year says the taxpayer submits an application and supporting documents through the taxpayer portal. DJP then issues an approval decision or a rejection notice. Its separate guidance covers a second or later change. A board or parent request to align year-ends is therefore a reason to assess the change, not evidence that the Indonesian tax year has already changed.

Before applying, document the current year-end, proposed period, business reason, affected returns, and the transition close. Check the DJP decision and Coretax profile before changing filing assumptions. A short or unusual transition period needs its own review; do not simply apply a twelve-month calendar to it.

Our guide to preparing PT PMA financial statements addresses the accounting close. For bookkeeping, reporting, and tax return preparation support, see InvestinAsia Accounting and Tax Reporting Services. InvestinAsia is the Indonesia market entry arm of vOffice Group; confirm the work scope for your company’s year-end and filing profile before engaging support.

Verify the Calendar Against Official Sources

Start with the tax year recorded in Coretax. Check DJP’s annual return announcement for the four-month corporate rule and its Coretaxpedia deadline page for the general monthly schedule. Then check the applicable published tax regulation and any newer DJP announcement for your specific tax type or filing year. DJP’s taxpayer portal guidance identifies the route for an accounting-year change.

Record the date you checked each source, the company-specific exception considered, and who approved the calendar. Our PT PMA compliance calendar shows how tax milestones sit alongside other corporate obligations, but the company’s own tax profile remains the controlling input.