A Tax Collection Letter often triggers panic the moment it lands in your inbox or mailbox. Yet once you understand what an STP is and why it is issued, responding becomes far calmer. This guide breaks it down layer by layer.
What Is a Tax Collection Letter
A Tax Collection Letter (Surat Tagihan Pajak, or STP) is a letter issued by the Directorate General of Taxes to collect tax and/or administrative penalties in the form of interest and/or fines. Its legal basis is Article 14 of Law No. 6 of 1983 on General Provisions and Tax Procedures (KUP), as amended several times, most recently by Law No. 7 of 2021 on the Harmonization of Tax Regulations (the HPP Law).
A common misunderstanding: an STP is not merely an informal warning. Under Article 14 paragraph (2) of the KUP Law, an STP carries the same legal force as a tax assessment letter. If ignored, it can become the basis for active collection, including the issuance of a distress warrant.
Legal Basis
The core provisions on the STP appear in Article 14 of the KUP Law. Relevant supporting provisions include:
- Article 14 paragraph (1) of the KUP Law: the list of conditions that trigger an STP.
- Article 14 paragraph (2) of the KUP Law: an STP has the same legal force as a tax assessment.
- Article 14 paragraphs (3) and (4) of the KUP Law: imposition of administrative penalties in the form of interest and fines.
- Article 9 of the KUP Law: the due date for tax debt stated in an STP.
- Article 19 of the HPP Law (Law No. 7 of 2021): the mechanism for the administrative penalty interest rate, set monthly by the Minister of Finance.
When an STP Is Issued
Article 14 paragraph (1) of the KUP Law sets out several conditions that lead the DJP to issue an STP, including:
- Income tax for the current year is unpaid or underpaid.
- The taxpayer is subject to an administrative penalty in the form of a fine and/or interest following a review of the tax return that reveals an underpayment due to a clerical or calculation error.
- A taxpayer registered as a Taxable Entrepreneur fails to issue a tax invoice, or issues one late or incompletely.
- A return is filed late and is therefore subject to a fine under Article 7 of the KUP Law.
In short, an STP usually arises from administrative matters: late filing, late payment, calculation errors, or failure to issue an invoice. It does not stem from an in-depth audit the way an SKPKB does.
STP vs Tax Assessment Letter
Many people confuse the STP with a tax assessment such as an SKPKB. The core difference: a tax assessment (for example an SKPKB) is generally issued after an audit and determines the principal tax still owed. An STP mostly collects administrative penalties or administrative shortfalls without a full audit.
Despite their different origins, both carry legal force and both must be addressed before their due date.
Administrative Penalties in an STP
Penalties in an STP are generally interest or fines. For interest, the HPP Law replaced the old scheme: the penalty interest rate is no longer a flat 2 percent per month. Instead it is calculated from the benchmark rate plus a set uplift, divided by 12, and determined each month by the Minister of Finance (Article 19 of Law No. 7 of 2021). The maximum interest period is 24 months.
For late-filing fines, the amount follows Article 7 of the KUP Law, for example IDR 100,000 for an individual annual income tax return and IDR 1,000,000 for a corporate annual income tax return.
How to Pay an STP
Practical steps when you receive an STP:
- Check the data: name, taxpayer ID, tax period or year, and the amount due.
- Generate a billing code (ID billing) through official DJP channels for the relevant tax type and period.
- Pay before the due date. Under Article 9 of the KUP Law, the tax owed in an STP must be settled within 1 month of the issuance date.
- Keep the proof of payment as a record.
Paying on time stops penalties from accumulating and avoids further collection action.
Worked Example
Budi, an MSME operator, filed his individual annual income tax return for fiscal year 2025 late. For this delay, the DJP issued an STP collecting a IDR 100,000 fine under Article 7 of the KUP Law. Because this is a pure administrative penalty and the data is correct, Budi's path is simple: generate an ID billing, pay IDR 100,000 before the due date, then keep the receipt. No panic, no audit.
It would be different if the STP were issued over an alleged calculation error that Budi believes is wrong. In that case, he could pursue one of the administrative routes below before paying.
If You Disagree With an STP
A taxpayer who believes an STP is incorrect does not have to pay without recourse. Routes available under the KUP Law include:
- A request to correct an STP that contains a clerical error, a calculation error, or a misapplication of the rules (Article 16 of the KUP Law).
- A request to reduce or waive an administrative penalty imposed due to oversight rather than the taxpayer's fault (Article 36 paragraph (1) letter a of the KUP Law).
Each request has its own requirements and deadlines, so read the applicable rules and time limits before applying.