An “invitation to explanation” is a mechanism whereby the tax administration offers the taxpayer an opportunity to clarify their declarations before a formal tax audit is initiated. This article explains how the process operates, what its key advantages are, and what actions taxpayers should take. For further information, please contact our office.
Under Article 370 of the Turkish Tax Procedure Law No. 213, an invitation to explanation is a procedure through which the administration requests a written explanation from the taxpayer when indications or findings suggest a potential tax loss. This mechanism entered Turkish tax law through legislative amendments in 2016 and was updated in 2019. Its principal objective is to establish communication between the administration and the taxpayer—before a tax audit or a process before the appraisal commission (takdir komisyonu) begins—in order to clarify potential issues at an early stage. In this way, the taxpayer may correct the matter without being penalized, or by facing a significantly reduced penalty, while the administration can resolve the issue without engaging in lengthy audit procedures.
In short, the invitation to explanation is a constructive instrument that allows taxpayers to correct inaccurate or incomplete declarations and to present their justifications before being subjected to a full tax audit.
Legal Basis and Regulatory Framework
The legal basis of the invitation to explanation is Article 370 of the Turkish Tax Procedure Law. This article was re-regulated under the heading “Invitation to Explanation” by Law No. 6728 dated 9 August 2016, and later amended by Law No. 7194 in 2019. Article 370 authorizes the administration to invite taxpayers to provide an explanation where “preliminary findings” (ön tespit) indicate that a tax may have been underpaid.
The procedural rules and principles governing the invitation to explanation are further detailed in General Communiqués issued by the Ministry of Treasury and Finance. In particular, the first implementation framework was set out under the Tax Procedure Law General Communiqué No. 482 (2017). Subsequently, the scope was expanded and certain updates were introduced by General Communiqué No. 519 (2020). The Revenue Administration (Gelir İdaresi Başkanlığı) has also published guidance brochures and infographics to enhance the clarity and accessibility of the procedure for taxpayers.
The rationale behind this mechanism is to promote voluntary tax compliance and to treat administrative penalties as a measure of last resort. In doing so:
- potential disputes between the administration and the taxpayer are reduced at an early stage,
- administrative time and resources are used more efficiently, and
- taxpayers are enabled to clarify the underlying substance of the facts by responding to the administration’s observations.
Accordingly, the invitation to explanation may be viewed as a preventive oversight mechanism that fosters voluntary compliance.
How Does the Invitation to Explanation Process Work?
The process typically begins when the Revenue Administration or the Tax Inspection Board identifies an inconsistency in a taxpayer’s declarations or transactions through risk analysis. Following this “preliminary finding,” the administration sends an official invitation to explanation letter, before launching a formal tax audit. This letter sets out the relevant details of the identified issue, the potential tax differences, and what the taxpayer is expected to clarify.
The invitation letter is served on the taxpayer by official notification, and in practice it is most commonly delivered through the Revenue Administration’s electronic notification system (e-Notification). While taxpayers may receive an email or SMS alert, legally the notification is deemed served when it is delivered to the system.
Upon service, a critical statutory period begins: the taxpayer must submit a written explanation to the authorized commission within 30 days from the date of service. If the taxpayer fails to submit an explanation within this timeframe, they will not benefit from the invitation to explanation mechanism and the matter may proceed directly to a tax audit or appraisal procedures.
The explanation petition must be addressed to the authority specified in the invitation letter. In practice, the competent body is generally the “Preliminary Findings and Explanation Assessment Commission” (Ön Tespit ve İzah Değerlendirme Komisyonu) established at the provincial level.
Taxpayers may submit their explanation via a traditional written petition, or through digital channels. As of 2023, it is possible to submit explanations online via the Digital Tax Office system (formerly the Interactive Tax Office). Taxpayers can access the relevant notification and submit their response electronically through the menu path “My Information > Invitation to Explanation Transactions.” This allows the process to be managed without visiting the tax office in person.
The commission reviews the explanation petition and any supporting documents. Under the relevant rules, the commission is expected to conclude its assessment promptly—generally within a few weeks after submission—while current practice envisages finalization within a maximum of 45 days.
The outcome may take one of three forms:
1) Explanation Deemed Sufficient
If the taxpayer’s explanations are found convincing and consistent, and the commission concludes that no tax loss has occurred, the decision is notified to the taxpayer in writing and no tax audit or referral to the appraisal commission is initiated in relation to the specific issue. The process ends in the taxpayer’s favor.
2) Explanation Deemed Insufficient / Request to File or Amend Returns
If the taxpayer’s explanations partially or fully acknowledge that a tax loss occurred, or if the commission finds the explanation unpersuasive, the taxpayer may be asked to correct the relevant declarations for the period and tax types identified in the invitation letter. The administration notifies the taxpayer and requests amendment of missing or incorrect returns.
In such cases, the taxpayer must file or amend the relevant tax returns within 30 days following the date of the notification and must pay the underpaid tax together with late payment interest. If the taxpayer fulfills these requirements, the tax loss penalty will be imposed at a reduced rate. The details of this reduction are addressed further below.
3) No Explanation / No Action Taken
If the taxpayer fails to submit an explanation within the 30-day period or does not take any corrective action, the invitation to explanation mechanism becomes ineffective and the administration refers the matter directly to a tax audit. At that stage, the taxpayer faces the conventional audit process, and assessments with full penalties may arise for any identified tax differences.
Following the commission’s assessment, an official notification is served on the taxpayer. If the explanation is accepted, the letter confirms that the matter is closed. If it is rejected and correction is required, the letter sets out the timeframe and obligations for filing amended returns and making payment. If the taxpayer corrects the issue and pays within the prescribed period, a tax loss penalty of 20% is imposed by law and the file is not referred to audit. However, if the taxpayer misses this second opportunity or fails to comply within time, the reduced-penalty benefit is lost and the standard process begins, potentially leading to full-rate penalties through audit or appraisal procedures.
In summary, the invitation to explanation offers a one-time opportunity window. Proper steps taken within this 30-day window can protect the taxpayer from severe penalties. If not, the process reverts to the standard route, resulting in both a lengthy audit and significant financial exposure.
Moreover, obtaining professional support from a tax law practitioner before preparing the explanation petition will generally enhance the legal robustness of the submission. When managed correctly and strategically, an explanation petition can help taxpayers avoid substantial tax loss penalties. For professional assistance in tax law matters, please contact our office.
Common Topics Triggering an Invitation to Explanation
The administration does not use the invitation to explanation mechanism in every situation; it applies only to certain types of inconsistencies or risk indicators. The topics initially listed under the General Communiqué No. 482 (16 headings) were expanded further by General Communiqué No. 519.
Below are the most common triggers in practice:
BA–BS Form Inconsistencies
Discrepancies between purchase and sales notification forms (Forms BA and BS) filed by companies may trigger an invitation to explanation. For example, if one company reports TRY 500,000 in sales but the counterparty does not report the corresponding purchase—or reports a different amount—cross-checks may flag a tax risk and an explanation may be requested.
Mismatch Between Card/E-Commerce Turnover and VAT Declarations
If turnover reflected through POS devices or e-commerce platforms is materially higher than what is reported in VAT returns, this is a frequent trigger. Data obtained from banks may be compared with VAT filings. Where the VAT base appears disproportionately low relative to POS turnover, the administration may suspect tax loss. In recent years, the Revenue Administration has intensified monitoring of e-commerce using data analytics, and such discrepancies may lead to an invitation to explanation.
Suspicion of Use of Fake or Misleading Invoices (SMİYB)
As a rule, the use of fake invoices or invoices misleading in content (SMİYB) is treated as a serious offense under Article 359 of the Tax Procedure Law. However, where the amount involved is relatively low (below certain thresholds), the administration may apply the invitation to explanation route. For example, if the total amount of such invoices does not exceed a specified annual threshold (stated in your text as TRY 700,000 for 2025) or does not exceed 5% of total purchases, the taxpayer may receive an “SMİYB preliminary finding letter,” which operates as a form of invitation to explanation. The intent is to allow the taxpayer either to justify the genuine nature of the invoices or to remove them from the records through corrective filings, thereby preventing more severe consequences.
Differences Between Declared Income and Banking/Third-Party Records
If declared income is inconsistent with banking records or third-party reporting, this may trigger a notification. Rental income is a classic example: if tenants report withholding taxes or payments via their filings but the landlord does not report rental income in the annual return, an invitation to explanation may follow. Similarly, if a company’s bank inflows suggest higher sales than reported, the administration may request clarification.
Excessive or Non-Deductible Expense/Allowance Claims
Overstated deductions exceeding legal limits in personal or corporate income tax returns can also be flagged. For example, certain donations or education/health expenses are deductible only up to specific limits; claiming amounts above these limits may lead to an invitation to explanation. Other technical areas include improper offsetting of prior-year losses, failure to declare withholding on profit distributions, or exceeding thin capitalization thresholds through related-party financing.
These examples illustrate when the invitation to explanation mechanism may be triggered. The key point is that if the administration’s data materially diverges from the taxpayer’s declarations, an explanation may be requested before punitive measures are applied. This can be a meaningful opportunity for taxpayers and an efficient audit-alternative for the administration.
Advantages and Potential Risks of the Invitation to Explanation
When managed correctly, the invitation to explanation can be highly beneficial for taxpayers. The principal advantages include:
Avoiding a Full Tax Audit
If the taxpayer provides a satisfactory explanation demonstrating that no tax loss occurred, the taxpayer will not be subjected to a tax audit (limited to the relevant issue). This avoids months of audit procedures and reduces disruption to business operations.
Reduced Penalties
If the taxpayer acknowledges the error and corrects the declaration, severe penalties generally do not apply. Instead of the standard tax loss penalty (typically 100% of the tax underpaid), a reduced penalty—commonly 20%—may apply. Procedural penalties are also typically avoided. Furthermore, the 20% penalty may be eligible for additional reductions under Article 376 of the Tax Procedure Law (e.g., reductions in exchange for timely payment).
Limited Additional Financial Burden Beyond Interest
Where tax was underpaid, the taxpayer is required to pay the principal tax amount and late payment interest (referred to in your text as “explanation interest”). However, since full tax loss penalties and additional procedural penalties are typically avoided, overall financial exposure can remain significantly lower.
A More Cooperative Relationship with the Administration
The process promotes early resolution through communication. Taxpayers can demonstrate good faith and transparency, and issues can be resolved before escalating into a contentious procedure. For companies, this can be important for reputational and operational stability.
That said, the mechanism must be handled carefully. Common risks include:
Missing the Deadline
Failing to respond within the 30-day period is one of the most critical risks. The taxpayer loses all advantages of the mechanism, and the administration may proceed with a full audit and full-rate penalties.
Submitting an Insufficient or Inconsistent Explanation
A timely response alone is not enough; the explanation must be persuasive and supported by documentation. A rushed, unsupported, or contradictory petition may be rejected and can undermine the taxpayer’s credibility.
Misconception Regarding “Voluntary Disclosure” (Pişmanlık)
Taxpayers sometimes assume they can ignore the invitation and instead file under the “voluntary disclosure” mechanism (Article 371). However, once an invitation to explanation has been served, taxpayers cannot benefit from voluntary disclosure for the issue covered by the invitation. Therefore, voluntary disclosure must be used before service of the invitation, not after.
Misunderstandings About Further Reductions and Settlement
After the 2019 amendments, additional reductions (e.g., under Article 376) may still be available, and settlement may be possible in some cases—however, for certain scenarios such as those involving fake invoices, settlement may be restricted. These issues should be evaluated professionally to avoid unrealistic expectations.
In summary, while the invitation to explanation offers substantial benefits, it will not deliver the desired outcome unless managed correctly and within the prescribed timelines. Where needed, taxpayers should seek specialist legal support to avoid procedural mistakes that could nullify the protections offered by the mechanism.
What Should You Do If You Receive an Invitation to Explanation Letter? (Step-by-Step)
f you receive an invitation to explanation letter, it is essential to remain calm and proceed systematically:
- Record the Date of Service (Deadline Management)
First, determine the exact date on which the invitation letter was served. The 30-day period starts from the date of service. Under standard rules, the day of service is not counted and the period starts the following day. The deadline ends at close of business on the 30th day. If the deadline falls on a weekend or public holiday, it extends to the next working day. - Review the Content Carefully
The letter specifies which issue and period require clarification. For example, it may state that a discrepancy is detected in VAT returns between input VAT and declared sales. Review the letter line-by-line to identify the tax type (VAT, personal income tax, corporate income tax, etc.), the relevant period, and the amount of the potential discrepancy, as well as the method and authority for submission. - Prepare Your Records and Supporting Documents
Collect all accounting records, invoices, receipts, bank statements, POS reports, and platform reports relevant to the issue. Coordinate with your accountant or financial advisor to gather the required documentation. A successful explanation is almost always document-driven. - Seek Professional Support (If Needed)
The invitation to explanation process can be technically complex. In certain cases, the administration’s preliminary finding may be based on incomplete information or misinterpretation; paying or correcting without assessment may lead to unnecessary financial loss. Professional review helps determine the most appropriate strategy. - Prepare the Explanation Petition
Draft a formal petition addressed to the competent commission. Respond to the administration’s points in an organized and clear structure, preferably in numbered paragraphs. If there is an actual mistake, acknowledge it and indicate your willingness to correct. If the discrepancy is due to a misunderstanding, demonstrate this with clear documentation. List all attachments clearly under an “Annexes” section and sign the petition by the authorized person. - Submit the Petition in Time
Submit the petition through the official channel before the deadline. The Digital Tax Office is generally the fastest and most reliable option, and it provides system confirmation/records. If submitting physically, ensure you obtain a registration number and keep a stamped copy. In all cases, retain evidence of timely submission. - File Corrective Returns and Pay (If Applicable)
If you identify an error and agree that a tax loss occurred, you may choose to file amended returns and pay the underpaid tax and interest without waiting for the commission’s final assessment. Note that the “voluntary disclosure” option generally does not apply once the invitation has been served. Retain payment receipts and be prepared to submit them to the administration if needed. - Monitor the Commission’s Response
The commission’s response may take several weeks. Monitor your notifications carefully. If your explanation is accepted, the letter will confirm that no audit will be initiated and the file will be closed. If rejected or correction is required, the letter will outline the assessment and deadlines. If you disagree with the outcome, you may consider legal remedies such as settlement or litigation within statutory time limits, depending on the circumstances.
Conclusion and Overall Assessment
The invitation to explanation is both a valuable right and a responsibility for taxpayers within the Turkish tax system. Taxpayers should not panic upon receiving such a notice; rather, they should recognize it as a structured opportunity to resolve an issue through an early-stage, cooperative channel. When managed properly, the invitation to explanation can prevent a full tax audit and substantial penalties. When ignored or mishandled, it becomes a missed opportunity and can signal a more challenging process ahead.
The administration is effectively stating: “Come and clarify the matter—perhaps we can resolve it without penalties.” If the taxpayer responds promptly, in good faith, and with adequate preparation, the administration often proceeds constructively. For companies in particular, managing this process successfully can protect both financial position and reputation.
Given the complexity of tax legislation, it is not realistic to expect all taxpayers to master every technical detail. If the taxpayer lacks confidence or if the amounts involved are significant, professional support should not be delayed. Strategic mistakes at this stage can lead to outcomes that are difficult to reverse.
Accordingly, if you receive an invitation to explanation letter, remain calm, follow the required steps, and seek specialist support where appropriate. While such a letter indicates that an issue has been identified, it also provides a valuable opportunity to resolve that issue with minimal cost and disruption.
Attorney Bahadır Bektaş – Tax Law Specialist
Bektaş Law Office is a law firm specialized in tax law. Leveraging strong command of the regulatory framework, we provide tax-related legal advice and representation to both corporate and individual taxpayers throughout Türkiye. Our services particularly focus on tax audits, tax disputes, settlement procedures, invitations to explanation, and tax litigation. When our clients receive an invitation to explanation notice, we advise them on how to proceed, what their rights and obligations are, and—where necessary—support them through the entire process, from drafting explanation petitions to communicating with the administration.
Although our office is based in Ankara, we serve clients across Türkiye through digital communication channels. If you are seeking reliable specialist support for tax-law matters or an invitation to explanation notice, Bektaş Law Office is prepared to provide the professional assistance you need.