A detailed legal guide to disciplinary procedures in the workplace in Turkey, covering internal rules, investigations, written defense, valid and just-cause dismissal, wage deductions, employee privacy, mediation, and HR compliance.
Disciplinary procedure is one of the areas where HR decisions most quickly become legal disputes. A late arrival, an insubordination claim, a harassment complaint, misuse of company systems, a refusal to perform duties, or a conflict with a manager may look like an internal management issue. Under Turkish law, however, disciplinary action sits inside a much wider legal framework. It touches employment contracts, workplace rules, dismissal law, employee privacy, anti-discrimination rules, personality-rights protection, and mandatory mediation. For that reason, disciplinary procedures in the workplace should not be managed as ad hoc reactions. They should be built as legally structured HR processes.
A useful starting point is that Turkish labour legislation does not create one single “disciplinary code” article that answers every question. Instead, the legal boundaries are spread across several rules. Labour Act No. 4857 provides the framework for equal treatment, valid-reason dismissal, written termination notices, the employee’s defense right in conduct- and performance-based dismissals, immediate termination for just cause, strict time limits for using just-cause dismissal, wage-cut penalties, and personnel-file confidentiality. The Turkish Code of Obligations adds the employer’s duty to protect the employee’s personality and to maintain workplace order consistent with honesty. KVKK regulates how investigation records and employee data may be processed. The Labour Courts Act then makes mediation mandatory before most employment claims reach court.
1. Disciplinary rules must have a legal source
The first legal boundary is simple: HR cannot invent sanctions without a lawful basis. This is clearest in Article 38 of the Labour Act, which states that the employer may not impose a wage deduction penalty except for reasons shown in the collective labour agreement or the individual employment contract. The same article requires that the employee be notified immediately, together with the reasons for the deduction, and it limits deductions to no more than two daily wages in one month. The law also requires these deducted amounts to be paid into a Ministry-designated bank account within one month and kept in a separate account for use in employee education and social services. This shows that even one of the most common disciplinary sanctions is tightly regulated.
This rule has a broader implication beyond wage deductions. If the employer wants to operate a real disciplinary system, the system should be reflected in the employment contract, collective agreement, or valid workplace rules connected to the employment relationship. A disciplinary policy that exists only as an unwritten managerial habit is weak. Turkish law does not let the employer treat wage penalties, formal sanctions, or dismissal grounds as purely discretionary. A defensible HR system should therefore define misconduct categories, sanctions, and procedure in advance rather than improvising after conflict arises.
2. Internal investigations are part of the employer’s duty of workplace order
Disciplinary procedure is not only about punishment. It begins with investigation. Article 417 of the Turkish Code of Obligations states that the employer must protect and respect the employee’s personality in the employment relationship, maintain workplace order in line with honesty, and, in particular, take necessary measures so that employees are not exposed to psychological or sexual harassment and so that those who have been exposed do not suffer further harm. This means HR is not free to ignore complaints or serious allegations on the theory that they are “personal issues.” Once conduct in the workplace affects dignity, order, or safety, the employer has a legal reason to investigate.
That same article matters in both directions. It requires the employer to protect the complaining employee and the wider workplace, but it also supports a disciplined and fair investigation process. HR should collect facts, identify the relevant policy or legal duty, hear the people involved, preserve confidentiality within lawful limits, and document what was found and why a sanction was or was not imposed. A disciplinary process that punishes first and investigates later is difficult to defend because the legal framework expects the employer to maintain an honest and orderly workplace, not simply to react with managerial force.
3. Employee data in disciplinary files are legally sensitive
A workplace investigation almost always produces personal data. Interview notes, witness statements, emails, CCTV extracts, attendance records, access logs, screenshots, complaint forms, and medical or harassment-related documents all fall within the data-processing framework of KVKK. Article 4 of the Personal Data Protection Law requires personal data to be processed lawfully and fairly, for specified, explicit, and legitimate purposes, in a relevant, limited, and proportionate manner, and only for as long as necessary. Article 5 adds that personal data generally cannot be processed without explicit consent unless one of the statutory grounds exists, including legal obligation, contractual necessity, rights protection, or legitimate interest that does not override the employee’s fundamental rights and freedoms. (KVKK)
This is especially important in disciplinary cases because employers often collect more data than they need. The safer legal approach is to process only the information genuinely necessary to investigate and decide the matter. A lateness case does not justify collecting unrelated health or family information. A harassment case may involve highly sensitive details and should therefore be handled with narrower access and stronger retention discipline. If special category data are involved, Article 6 becomes critical. It classifies health data, union membership, criminal-conviction data, biometric data, and several other categories as special category personal data and permits processing only under specific conditions, including where it is explicitly provided by law, necessary for the protection of a right, or necessary for legal obligations in employment and occupational health and safety. (KVKK)
KVKK also requires transparency and data security. Article 10 obliges the data controller to inform data subjects about identity, purpose, transfer recipients, and legal basis when data are obtained. Article 11 gives employees rights to learn whether their data are being processed, seek correction, request erasure where lawful conditions are met, object to purely automated adverse outcomes, and seek compensation for unlawful processing. Article 12 requires the controller to take technical and organizational security measures, and Article 13 requires requests to the controller to be answered within the shortest time and no later than 30 days. For HR, that means investigation files should not be handled casually through open email chains or loose access rights. (KVKK)
4. Not every sanction is legally equal
One of the most common HR errors is to treat all misconduct as if it leads naturally to the same kind of sanction. Turkish law requires a sharper distinction. A written warning, a wage deduction, a suspension-like internal measure, a role change, and termination are not the same legal act. Wage deductions are expressly regulated by Article 38. A role change may trigger Article 22 if it amounts to a substantial change in working conditions. Dismissal for conduct or performance falls under Articles 18 and 19 in job-security cases, while immediate dismissal for severe misconduct falls under Article 25. HR should therefore decide the legal category of the sanction before taking action.
Article 22 is particularly important where the employer uses discipline to justify a major change in duties, workplace, schedule, or status. It states that the employer may make a substantial change in working conditions arising from the contract, annexed personnel regulations, similar sources, or workplace practice only by notifying the employee in writing. Changes not made in that form and not accepted in writing within six working days do not bind the employee. If the employee rejects the change, the employer may terminate only by complying with notice and by stating in writing that the change was based on a valid reason or that another valid reason existed. In practical terms, HR cannot disguise a contractual downgrade as an ordinary disciplinary instruction.
5. Dismissal for conduct must follow the right legal path
Where discipline leads to dismissal, Turkish law distinguishes between valid-reason dismissal and just-cause dismissal. Article 18 provides that, in workplaces with 30 or more employees, an employer terminating an employee with at least six months of seniority under an indefinite-term contract must rely on a valid reason connected with the employee’s capacity, conduct, or the operational requirements of the workplace or business. The same article also lists reasons that do not constitute valid grounds, including union activity, filing complaints with authorities, and grounds such as race, sex, family responsibilities, pregnancy, religion, political opinion, and similar protected characteristics.
Article 19 then adds the core disciplinary-procedure safeguard: the employer must issue the termination notice in writing and state the reason clearly and precisely. More importantly, it says that an employee’s indefinite-term contract may not be terminated for reasons related to the employee’s conduct or performance without first taking the employee’s defense against the allegations. This is one of the most load-bearing rules in Turkish dismissal law. It means that, in an ordinary misconduct case that does not rise to the special Article 25 level, HR must hear the employee before ending the contract. A dismissal letter drafted without a prior defense stage is procedurally exposed.
This defense requirement is not a mere formality. It is part of the distinction between ordinary conduct-based dismissal and immediate dismissal for exceptional misconduct. HR should therefore present the employee with the concrete allegations, identify the relevant facts, allow a meaningful response, and document that response before making the final decision. A paper exercise where the outcome is predetermined may still look weak if later reviewed in mediation or court.
6. Immediate dismissal for just cause is narrower than many employers assume
Article 25 allows the employer to terminate immediately, without waiting for the notice period, in limited situations. These include certain health-related cases, serious immoral or bad-faith conduct, force majeure, and detention or arrest beyond the Article 17 notice period. In the misconduct field, Article 25 includes situations such as misleading the employer on essential qualifications, insulting or assaulting the employer or coworkers in the ways listed, sexual harassment of another employee, dishonesty and breach of trust, theft, being drunk or under drugs at work, repeated unauthorized absence, refusal to perform assigned duties after reminder, and causing serious damage through intent or gross negligence. These are much narrower than “the employee behaved badly.”
This matters because some HR teams overuse Article 25 simply because they want a cleaner exit. That is dangerous. If the facts do not genuinely fit the statutory just-cause categories, the dismissal may be recharacterized as an invalid conduct-based termination or even as an unlawful dismissal. Article 25 is not a general disciplinary shortcut. It is a specific statutory response to especially serious conduct. A prudent HR function should therefore classify Article 25 cases conservatively and only after a careful fact review.
There is also a strict time limit. Article 26 states that the right to terminate under the morality and good-faith grounds in Articles 24 and 25 must be exercised within six working days from the day the other party learns of the conduct, and in any event within one year from the occurrence, unless the employee obtained a material benefit from the act. This is one of the most overlooked legal boundaries in disciplinary practice. Even a strong just-cause ground can be weakened if the employer waits too long after learning the facts.
7. Anti-discrimination limits apply to discipline too
Disciplinary procedure is not exempt from equality law. Article 5 of the Labour Act prohibits discrimination in the employment relationship on grounds such as language, race, color, sex, disability, political opinion, philosophical belief, religion, sect, and similar reasons. It also prohibits direct or indirect different treatment due to sex or pregnancy in the making, conditions, implementation, and termination of the contract, unless objectively justified by biology or the nature of the work. Where the employer violates these rules, the employee may claim up to four months’ wages in discrimination compensation in addition to deprived rights.
This means HR should check whether discipline is being applied consistently across comparable employees. If similar conduct leads to a warning for one employee but dismissal for another, and the difference correlates with protected grounds or protected activity, the employer’s case becomes riskier. The same concern applies to union activity. Article 18 says union activity and participation in administrative or judicial processes against the employer do not form valid grounds for dismissal. A disciplinary process that appears to target protected conduct rather than real misconduct can therefore fail on both procedural and substantive grounds.
8. Personnel files and confidentiality are not optional
Article 75 of the Labour Act states that the employer must create a personnel file for each employee and keep the documents and records required under the Labour Act and other laws, and show them to authorized authorities when requested. The same article also requires the employer to use information about the employee in line with honesty and law and not disclose information the employee has a justified interest in keeping secret. Disciplinary records therefore belong in a legally managed personnel-file system, not in scattered email folders or informal chat archives.
This is especially important because disciplinary records often become decisive later in dismissal disputes. If the employer claims repeated misconduct, prior warnings, or a history of investigation, it should be able to show when those records were created, how the employee was informed, and how confidentiality was preserved. Weak recordkeeping can undermine an otherwise defensible sanction.
9. Most disciplinary disputes first go to mediation
Turkish employment disputes usually do not begin in court. Article 20 of the Labour Act states that an employee who claims the dismissal reason was not given or was invalid must apply to a mediator within one month of the termination notice in accordance with the Labour Courts Act. If no settlement is reached, the employee may file suit within two weeks from the final mediation report. The same article places the burden of proving the validity of the dismissal reason on the employer, unless the employee argues that the real reason was something else.
The Labour Courts Act reinforces this in broader terms. Article 3 of Law No. 7036 states that mediation is a condition of action in cases involving employee or employer receivables, compensation claims, and reinstatement claims arising from law or individual or collective labour agreements. If mediation is skipped, the lawsuit is procedurally dismissed. For HR, this means disciplinary cases should be prepared as if they will be scrutinized in mediation first. A poorly documented investigation, missing defense statement, vague dismissal letter, or inconsistent sanction history can weaken the employer before the case even reaches court. (Adalet Bakanlığı)
If the dismissal is found invalid, Article 21 sets out the consequences. The employer must re-employ the worker within one month, or else pay compensation of four to eight months’ wages, and also pay up to four months’ wages and other rights for the time the employee was not working until the judgment became final. This is why disciplinary dismissals deserve much more care than ordinary managerial friction might suggest.
10. What HR should actually do
A legally defensible disciplinary system in Turkey usually has six features. First, it has a written source: employment contracts, collective agreements, and properly communicated workplace policies define misconduct categories and available sanctions. Second, it distinguishes between ordinary corrective sanctions and dismissal-level sanctions. Third, it investigates facts before acting and documents the process. Fourth, it handles personal data proportionately and securely. Fifth, it gives the employee a real defense opportunity where Article 19 requires it. Sixth, it preserves records in the personnel file and prepares the case for possible mediation and litigation.
The practical lesson is that HR should never jump directly from complaint to dismissal without classifying the legal route. A warning may be enough in one case. A wage deduction may be lawful only if the contractual basis and Article 38 limits are satisfied. A role change may require Article 22 written process. A conduct-based dismissal may require Article 19 defense. A just-cause dismissal may require Article 25 analysis and Article 26 timing. The better the classification, the safer the procedure.
Conclusion
In Turkey, disciplinary procedures in the workplace are governed by legal boundaries that HR cannot ignore. Wage-cut penalties are tightly limited by Article 38. Conduct-based dismissals in job-security cases require written notice and a prior defense under Article 19. Valid-reason dismissal must fit Article 18, while immediate dismissal must fit the narrower Article 25 grounds and usually be exercised within the Article 26 time limits. Substantial disciplinary changes to working conditions may trigger Article 22. Employee data in investigations must comply with KVKK’s lawfulness, proportionality, transparency, security, and response rules. Personnel files must be kept lawfully and confidentially under Article 75. And most disputes will go first to mandatory mediation under the Labour Courts Act.
For HR managers, the safest conclusion is clear. Discipline should be built as a rules-based process, not a manager’s mood. When the employer defines sanctions in advance, investigates carefully, protects privacy, hears the employee where the law requires it, and documents every step, disciplinary action becomes far easier to defend. When those safeguards are missing, even a real misconduct problem can turn into an avoidable legal defeat.
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