Deloitte Behavioural Interview: Competencies & STAR Tips

What a Deloitte behavioural interview actually tests

Like most large professional services firms, Deloitte uses behavioural (competency-based) questions to predict how you'll perform on the job by looking at how you've behaved in the past. Rather than asking hypothetical 'what would you do' questions, interviewers ask you to describe real situations: a time you solved a difficult problem, led a team, handled conflict, or dealt with a mistake.

The exact format varies by practice area (Audit, Consulting, Tax, Technology) and level (graduate, experienced hire, manager), and may appear as a video-based first-stage screen, a live interview, or part of an assessment centre. What stays consistent is the underlying method: they're checking for evidence-based competencies, not rehearsed opinions.

Competencies commonly assessed

Professional services firms including Deloitte generally publish the qualities they look for on their graduate and experienced-hire careers pages, and these map closely onto well-established competency frameworks used across the industry. You should expect questions probing a mix of the following:

• Problem-solving and sound judgement — how you break down ambiguous or complex issues and reach a decision
• Client focus / exceptional service — how you've understood and met a client's or stakeholder's needs, sometimes under pressure
• Working with others / teamwork — how you've collaborated, supported colleagues, or navigated disagreement in a team
• Leadership and influence — even at entry level, examples of taking initiative or motivating others without formal authority
• Talent development — how you've coached, mentored, or given feedback to help someone else improve
• Adaptability and resilience — handling change, setbacks, or shifting priorities
• Integrity and quality delivery — examples of upholding standards, owning mistakes, or delivering accurate work under deadline pressure
• Diverse perspectives / inclusion — how you've worked with or learned from people with different backgrounds or viewpoints

The STAR method: your structure for every answer

STAR stands for Situation, Task, Action, Result. It gives interviewers exactly what they need — context, your specific contribution, and a measurable outcome — without you rambling or listing generic strengths.

Situation: set the scene briefly (where, when, who was involved). Task: state what you specifically had to achieve or the challenge you faced. Action: this is the bulk of your answer — what you actually did, step by step, using 'I' rather than 'we'. Result: close with the outcome, ideally with a number, and a short reflection on what you learned.

Worked example: 'Tell me about a time you solved a difficult problem'

Here's a full STAR answer for a problem-solving question, at a length that would suit a 90-second to two-minute response:

Situation: 'During my final-year group project, our team's data collection process broke down two weeks before the deadline because a survey tool we relied on stopped working correctly.' Task: 'As the member most familiar with the data, I needed to find a way to recover our progress without delaying the group's final submission.' Action: 'I first audited what data we still had and identified which sections were salvageable. I then researched two alternative survey tools, tested them against our original questions within an evening, and proposed the quicker option to the team with a revised timeline. I also split the remaining data collection into smaller batches across the group so no single person was overloaded.' Result: 'We recovered full data coverage within four days, submitted on time, and the project received a first-class mark. The experience taught me to build contingency checkpoints into any project relying on external tools.'

Notice the answer is specific (a real tool failure, a real number of days), shows individual action within a team context, and ends with a genuine outcome plus a lesson — exactly what interviewers are listening for.

Do this, not that

Small adjustments to how you frame answers make a disproportionate difference to how competent you sound.

• Do use a specific, real example — Don't answer in the abstract ('I usually approach problems by...')
• Do quantify the result where possible — Don't end on a vague statement like 'and it worked out well'
• Do say 'I' for your actions — Don't hide your individual contribution inside 'we did X'
• Do keep Situation and Task brief — Don't spend half your answer on background before you get to what you did
• Do prepare 6–8 flexible stories that can answer multiple competencies — Don't try to memorise one script per possible question
• Do mention a mistake or setback honestly if asked — Don't claim you've never made one

How to prepare properly

Start by listing 6–8 substantial examples from work, internships, university projects, or volunteering — each one rich enough to be reshaped for different competencies (a single tricky group project can often illustrate teamwork, leadership, and problem-solving depending on which part you emphasise).

Then rehearse them out loud, under time pressure, ideally on camera. Many candidates write a strong STAR answer but freeze or ramble when actually recording themselves for a timed video interview — the format itself adds pressure that reading notes doesn't replicate. Practising with a tool like ScreenReady, which simulates the timed, one-way video format and gives feedback on pacing and structure, is a useful way to catch habits (filler words, running over time, weak endings) before the real interview.

Finally, read Deloitte's own published values and competency descriptions for the specific practice area and level you're applying to — language shifts between graduate and experienced-hire pages, and mirroring their terminology (without sounding scripted) shows you've done your homework.