Fiscal year
Learn what a fiscal year is, how it works in Indonesia and which tax deadlines depend on it.
Published Wednesday 30 September 2026
Table of contents
Key takeaways
- A fiscal year is any 12-month period a business uses for its accounts and tax reporting
- In Indonesia, the tax year (tahun pajak) follows the calendar year unless your business keeps a different book year (tahun buku)
- A non-calendar book year must be used consistently and reported to your local tax office
- Annual tax returns are due three months after year end for individuals and four months after for companies
What is a fiscal year?
A fiscal year is the 12-month period your business uses to record income and expenses, prepare accounts and work out tax. It can start on any date.
Think of it as your business's own calendar for money. A café that opens in July might run its books July–June. Each year's figures then match a full trading cycle.
Fiscal years usually carry a single year label, which gets confusing when the period spans two. The Directorate General of Taxes (DJP) names a non-calendar tax year after the calendar year holding its first six months or more. Under the DJP's tax year naming rule, a book year of 1 July 2008–30 June 2009 counts as tax year 2008.
Fiscal year vs calendar year vs financial year
These terms overlap, but each describes a slightly different period:
- A calendar year always runs from 1 January to 31 December
- A fiscal year is any 12-month period used for accounting and tax, and it can match the calendar year
- A financial year is another name for a fiscal year
- A tax year is the period your tax is worked out on, called the tahun pajak in Indonesia
- A book year is the period your company keeps its accounts for, called the tahun buku in Indonesia
When does the fiscal year start and end in Indonesia?
In Indonesia, the tax year runs from 1 January to 31 December by default. If your business uses a different book year, your tax year follows that book year instead, as set out in the legal definition of tahun pajak.
So your dates depend on the book year you set up. A company on the calendar year closes its books on 31 December, while one using an April–March book year closes on 31 March.
Indonesia's government fiscal year
The government's fiscal year, or tahun anggaran, is fixed at 1 January–31 December under Law 17 of 2003 on State Finances. It governs the state budget.
That's separate from your business's own year. A ministry's 2026 budget means calendar year 2026, even if your book year runs July–June.
Fiscal quarters explained (Q1 to Q4)
A fiscal quarter is one of four three-month blocks in your fiscal year. Quarters give you checkpoints to spot trends before year end.
On a calendar-year fiscal year, the quarters fall like this:
- Q1 covers January–March
- Q2 covers April–June
- Q3 covers July–September
- Q4 covers October–December
If your fiscal year starts on 1 July, Q1 becomes July–September and Q4 ends in June. Reviewing each quarter alongside a cash flow forecast helps you plan for busy and quiet months.
Why your fiscal year matters
Your fiscal year sets the timetable for most financial tasks. Your year end decides when you prepare financial statements and file your annual tax return (SPT Tahunan).
It also shapes the months between those deadlines. Here's what ties back to it:
- monthly returns for income tax (Pajak Penghasilan, PPh) and value added tax (Pajak Pertambahan Nilai, PPN)
- the annual report your directors present to shareholders
- budgets and sales targets for the year ahead
- year-on-year comparisons of your results
You file these returns through Coretax, the DJP's Core Tax Administration System. It's been in effect since 1 January 2025, according to the DJP's Coretax announcement.
How to choose your fiscal year
Choose the 12-month period that fits how your business trades. The calendar year is the simplest option because it matches the default tax year.
Before you decide, think about:
- your busiest season, so year end lands in a quieter month
- your accountant's availability for year-end work
- the reporting year of any parent company or investors
- your choice of cash or accrual accounting, which affects when income and costs count
If you pick a non-calendar year, you'll need to use it consistently for 12 months and report it to your local tax office (KPP). DDTC's explainer on tax years covers this rule in more detail.
Article 28 of Indonesia's tax procedures law holds bookkeeping to the consistency principle (taat asas), so changing your book year needs the Director General of Taxes' approval.
Key dates and deadlines for your fiscal year
Your key deadlines count forward from the day your fiscal year ends. The DJP's annual filing deadlines set the return dates, and other rules add monthly dates.
Here are the main dates to plan around:
- individual annual returns, due within three months of year end (31 March on a calendar year)
- company annual returns, due within four months of year end (30 April on a calendar year)
- an extension of up to two months, if you give the DJP written notice under its extension guidance
- monthly income tax payments, including Article 25 instalments, due by the 15th of the next month under Minister of Finance Regulation (PMK) 81/2024
- the annual general meeting of shareholders (RUPS), held within six months of book year end under Law 40 of 2007 on Limited Liability Companies
Keeping your bookkeeping current makes these dates easier to meet.
Stay on top of your fiscal year with Xero
A clear fiscal year and up-to-date books turn year end into a routine task. Xero brings in transactions automatically through bank feeds, and you can customise financial reports for any period, including each quarter.
Share your figures with your accountant in real time, so returns are ready early. Try Xero today and get one month free.
FAQs on fiscal year
Here are quick answers to common questions about fiscal years in Indonesia.
Is a fiscal year the same as a tax year?
For most Indonesian businesses, they cover the same 12 months, since your tax year follows your book year. The year labels can differ, so check which tax year name belongs on your return.
Can I change my company's fiscal year?
Yes, you can apply to the KPP where your business is registered, and the new book year then needs to be used consistently. Plan the switch with your accountant so your records line up across both periods.
What happens if I miss a filing deadline?
Late annual returns attract a fine of IDR 100,000 for individuals and IDR 1,000,000 for companies, according to the DJP's late-filing penalties. Late monthly returns cost IDR 500,000 for VAT and IDR 100,000 for other returns.
What does FY26 mean?
FY26 is short for fiscal year 2026. For a calendar-year business in Indonesia, it runs 1 January–31 December 2026, so check the dates behind the label for any other book year.
How long do I need to keep financial records?
You need to keep your books and supporting documents in Indonesia for 10 years, under Article 28(11) of the tax procedures law.
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Disclaimer
This glossary is for small business owners. The definitions are written with their requirements in mind. More detailed definitions can be found in accounting textbooks or from an accounting professional. Xero does not provide accounting, tax, business or legal advice.