What is a competency-based interview?
A competency-based interview is a structured method that assesses whether a candidate has the competencies a role requires by asking how they behaved in specific past situations. The idea is simple: past behaviour is one of the best predictors of future behaviour. Instead of "How would you resolve a conflict?", you ask "Tell me about a time you resolved a disagreement in your team."
In free-form interviews each candidate gets different questions, assessment depends on the interviewer's impression and the decision cannot be justified later. In a structured interview every candidate answers the same questions about the same competencies, and answers are scored on a predefined scale. The result is a more accurate and fairer selection. For foreign companies hiring in Turkey, structure also makes it easier to apply a global interview standard while respecting local rules on equal treatment and personal data.
How should you prepare before the interview?
A good interview starts before the candidate walks in. Preparation involves these steps:
- Choose competencies: Based on the job description, define 4 to 6 core competencies. For a payroll specialist, for example: accuracy, legislation knowledge, time management, communication and problem solving.
- Assign questions: Write 2 or 3 behavioural questions and follow-ups for each competency.
- Define the scale: Use a 1 to 5 rating scale and write down what each score means.
- Set up the panel: Decide in advance which interviewer covers which competencies.
- Plan the time: In a 45 to 60 minute interview, allow time for the opening, competency questions, the candidate's questions and the close.
The interview is one stage of the wider recruitment process. You can follow the headcount, posting and offer steps in that guide.
How do you assess answers with the STAR technique?
The STAR technique is widely used to structure answers to behavioural questions:
- Situation: What was the context?
- Task: What was the candidate responsible for?
- Action: What did the candidate personally do?
- Result: What happened, is there a measurable outcome, and what did the candidate learn?
Candidates often speak in terms of "we" or give hypothetical answers. The interviewer's job is to reach the candidate's own actions with follow-up questions: "What exactly did you do?", "What was the outcome?", "What would you do differently next time?"
Which interview questions fit which competency?
The questions below are examples for commonly used competencies. Adapt them to your role.
Problem solving
- Tell me about a problem you faced when the available information was not enough. How did you proceed?
- Give an example of a recurring error you spotted in a process. How did you find the root cause?
Communication and collaboration
- Describe a time you had to explain a technical topic to someone outside your field.
- Give an example of a disagreement with a colleague and how you resolved it.
Ownership and results focus
- Tell me about a time a target you owned was at risk. What did you do?
- How did you act when you noticed a mistake you had made?
Prioritisation and time management
- Describe a week when several urgent tasks landed at once. What criteria did you use to prioritise?
- What did you do when you realised you would miss a deadline?
Leadership (for managerial roles)
- Describe a conversation you had with an underperforming team member.
- How did you implement a change your team resisted?
Technical and role-specific questions
Alongside competency questions, measure the technical knowledge the job needs. For a payroll role in Turkey you might ask: "Can you calculate the January 2026 net pay of an employee earning TRY 50,000 gross, step by step?" The correct answer: SGK (Social Security Institution) employee share TRY 7,000.00, unemployment insurance TRY 500.00, income tax base TRY 42,500.00, income tax after exemption TRY 2,163.67, stamp duty TRY 128.80 and net pay TRY 40,207.53. What matters more than the final number is whether the candidate accounts for the minimum wage exemption and the cumulative tax base. Use the salary calculator and payroll parameters to check.
How do you score interview answers? A sample scorecard
Use a scale based on behavioural indicators for each competency. A shared 1 to 5 scale might look like this:
| Score | Meaning |
|---|---|
| 1 | No concrete example, or the example was unrelated to the competency |
| 2 | Example given, but personal contribution unclear and no result |
| 3 | Clear example with personal action and a reasonable result |
| 4 | Strong example, measurable result and lessons learned |
| 5 | Several strong examples, behaviour that also guides others |
If competencies differ in importance for the role, use weights. Below is a weighted score for two candidates:
| Competency | Weight | Candidate A score | Candidate A weighted | Candidate B score | Candidate B weighted |
|---|---|---|---|---|---|
| Accuracy and attention | 30% | 4 | 1.20 | 3 | 0.90 |
| Legislation knowledge | 25% | 3 | 0.75 | 5 | 1.25 |
| Problem solving | 20% | 4 | 0.80 | 3 | 0.60 |
| Communication | 15% | 5 | 0.75 | 3 | 0.45 |
| Time management | 10% | 3 | 0.30 | 4 | 0.40 |
| Total | 100% | 3.80 | 3.60 |
The total alone does not decide, but it grounds the discussion in data. In the example, Candidate B is strong in legislation knowledge; if training can close that gap, Candidate A may come out ahead, and if not, Candidate B. Record the decision together with this reasoning.
Which questions must not be asked in an interview in Turkey?
The equal treatment principle in the Turkish Labour Law and the legislation of the Human Rights and Equality Institution of Turkey prohibit discrimination based on language, race, colour, gender, disability, political opinion, philosophical belief, religion, sect and similar grounds. KVKK (Turkey's Personal Data Protection Law) also limits the collection of personal data unrelated to the job. These topics should therefore stay out of interviews:
- Marital status: "Are you married?", "Do you plan to get married?"
- Pregnancy and family plans: "Are you pregnant?", "Are you planning children soon?", "Who looks after your child?"
- Age: Unless the job has a legal age requirement, do not ask for age or year of birth.
- Religion, sect and belief: "Do you fast?", "What is your religion?"
- Political views and union membership: "Which party do you vote for?", "Are you a union member?"
- Ethnic origin and hometown: Questions that could lead to discriminatory assessment
- Health and disability: Do not ask about general health history; you may discuss whether the candidate can perform the essential functions of the job and any reasonable adjustments needed.
- Sexual orientation and private life: Never a topic.
If a candidate raises one of these topics, do not note it and do not factor it in. If a question stems from a real job need, ask about the requirement, not the personal characteristic. For example, instead of "Do you have children?", ask "The role involves out-of-town travel twice a month; does that work for you?" Where you are unsure about the legal position, confirm the current rules with the official source.
Refusing to hire, or terminating, because of pregnancy breaches the equal treatment principle. For how to manage maternity and nursing leave as an employer, see the maternity leave employer guide.
Which interview formats are used and when?
Competency-based interviewing is stronger when combined with other assessment methods. Common formats are:
- Phone or video screen: A short 15 to 20 minute call covering salary expectations, start date and basic fit.
- Panel interview: A structured interview with several interviewers at once. It reduces repetition and respects the candidate's time.
- Case study: The candidate works through a realistic job problem and discusses the approach. It complements competency questions well for analytical roles.
- Work sample: The candidate produces a real piece of work such as a short calculation, text or design. Keep it completable in reasonable time and do not use the output commercially.
- Meet-the-team interview: A final-stage conversation with the team or a senior leader to check mutual fit. The same prohibited topics apply here.
How do you open and close the interview?
At the start, introduce yourself and the panel, explain the length and structure of the interview and mention that you will take notes. This reduces nerves and leads to more concrete answers. At the end, give the candidate time for questions and state the next steps with a clear date for feedback. The candidate's questions also tell you about their motivation and preparation.
Which biases should interviewers watch for?
- First impression effect: The first few minutes shaping the whole interview.
- Similarity bias: Rating candidates who resemble you more favourably.
- Halo effect: One strong trait lifting scores for other competencies.
- Contrast effect: Scoring a candidate against the previous one instead of the scale.
The most effective ways to reduce these biases are to ask the same questions in the same order, take notes while the candidate answers, and enter scores immediately after the interview, independently of other panelists.
What should the employer do after the interview?
Once panelists have entered their scores, hold a short debrief. Discuss score differences for each competency; where scores differ by more than two points, go back to the notes. Record the decision and its rationale in writing.
Interview notes contain personal data. Define why they are kept, who can access them and how long they are retained, and explain this in the candidate privacy notice. For the selected candidate, move on to the hiring paperwork; development areas identified in the interview can feed into the onboarding plan and the first performance review goals.