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Complete guide · 4 min read

In-Depth Interviews in India: The Complete Guide

Everything you need to know about in-depth interviews in India: what it is, when to use it, methods, deliverables, timelines and how to choose a partner.

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Quick answer

In-Depth Interviews is a qualitative research approach. One-to-one conversations that uncover the motivations behind decisions. In India it is typically delivered through face-to-face idis, telephonic idis, expert interviews, paired depths, and produces transcripts, thematic analysis, persona profiles.

At a glance

Guide type
Complete guide · 4 minute read
Method covered
In-Depth Interviews
Research family
Qualitative research
Typical timeline
4–6 weeks from guide sign-off to the thematic report
Typical sample
20–30 interviews per audience, stopping when new themes stop appearing
Written for
Teams new to the method · Brand and category managers · Consultants scoping a study

Key takeaways

  • In-Depth Interviews is best used when you need to understand the 'why'
  • India's diversity means city and language choices matter
  • Quality control is the main difference between good and poor vendors
  • Senior involvement drives the quality of insight

Reader intent

Who this guide is for

Three readers arrive here with different problems. Each should be able to act on this page without reading all of it.

  • Teams new to the method

    Start here if you know the business question but are not yet sure that in-depth interviews is the right way to answer it.

  • Brand and category managers

    Brief an agency in the method's own language, and judge what comes back on more than its price.

  • Consultants scoping a study

    The methods, deliverables and timings here map straight onto a in-depth interviews scope of work.

01

What is in-depth interviews?

One-to-one conversations that uncover the motivations behind decisions.

It sits within the qualitative family of research methods. It is often combined with other approaches to give a fuller picture.

02

When should you use it?

Use it when a business decision is uncertain and the cost of being wrong is high.

  • Launching a new product or entering a new city
  • Explaining a drop in sales or share
  • Choosing between strategic options
  • Building a business case for investors or the board

03

Methods used in India

The right method depends on your audience, budget and timeline.

  • Face-to-face IDIs
  • Telephonic IDIs
  • Expert interviews
  • Paired depths

04

Typical deliverables

  • Transcripts
  • Thematic analysis
  • Persona profiles

05

Making it work in India

India is many markets in one. Language, income, urbanisation and retail structure all vary by region, so a good study design reflects that diversity. This might mean regional quotas, local-language fieldwork, or separate readings for Tier 1 and Tier 2 cities.

06

How Market Research India can help

Market Research India designs and runs in-depth interviews projects across 50 Indian cities and 30 industries. A senior research director leads every study, and our own supervised teams handle the fieldwork. You get clear recommendations, not just data tables.

Share your objective and we will send a scoped, fixed-fee proposal within 24 hours, with a recommended method, sample and timeline.

What goes wrong

Common mistakes in in-depth interviews

Most disappointing in-depth interviews studies fail for reasons that were visible in the design, not in the fieldwork. These are the ones we see most often, and what to do instead.

  • 01

    Questions that carry their own answer

    “What do you dislike about the service?” presumes dislike. Ask what happened last time, then follow the story rather than the hypothesis.

  • 02

    Accepting the first answer

    The first response is a rationalisation. Laddering — asking why that matters, three or four times — is what separates a depth interview from a long survey.

  • 03

    Recruiting everyone from one source

    Twenty-five interviews all sourced from a single customer list describe that list, not the market. Use at least two independent recruitment routes.

  • 04

    Counting mentions as if they were data

    “14 of 25 said” lends a qualitative sample the authority of a survey it has not earned. Report themes and their reasoning, and quantify separately if you need numbers.

  • 05

    Moderator bias nobody checks

    A moderator who already believes the answer nods at agreement and probes only dissent. Brief on the decision rather than the hypothesis, and review the first session before the rest go ahead.

  • 06

    Regional language nuance lost in translation

    Category language in Hindi, Tamil or Marathi rarely survives live translation. Work in the respondent's language and translate the transcript, not the conversation.

Run through this before sign-off

Your checklist before you brief anyone

A working sequence for a in-depth interviews project. Most of it costs nothing, and it saves the two weeks a re-field would take.

  1. 1

    Write the screener before the discussion guide; who you talk to decides more than what you ask.

  2. 2

    Pilot two interviews and rewrite the guide before the rest are scheduled.

  3. 3

    Record and transcribe with explicit consent, and keep the recording in the interview language.

  4. 4

    Ladder every important answer with “and why does that matter to you?” at least twice.

  5. 5

    Code to a shared framework, so two analysts reading one transcript reach the same themes.

  6. 6

    Hold a same-day field debrief, before impressions harden into a story.

  7. 7

    Agree in writing who acts on each finding, and by when, before the debrief ends.

Need in-depth interviews?

Get a scoped proposal within 24 hours.

Explore In-Depth Interviews

Answers

Frequently asked questions

The questions buyers ask us most often before they commission in-depth interviews.

How long does in-depth interviews take?

Most projects take 3–6 weeks from sign-off to final report.

Can it be done online?

Many studies can be run fully or partly online. Some audiences still need face-to-face fieldwork.

Request a proposal

Talk to a in-depth interviews specialist.

From guide to project

Where in-depth interviews actually gets commissioned

If this guide has settled the method, these are the pages worth opening next: the service itself, and the markets where in-depth interviews is most often run for our clients.

Keep exploring

More reading on in-depth interviews

Grouped rather than listed, so you can find the one page you need instead of scanning a wall of links.

More on in-depth interviews

14

Every angle we have published on this method: what it costs, how long it takes, how large the sample should be and how to choose a partner.

Show 6 more

Other complete guide articles

19

The same complete guide written for each of our other research methods, so you can compare like with like.

Show 11 more

In-Depth Interviews city by city

50

Local field teams, local languages and the sector mix each market is strongest in.

Show 42 more

Related research services

19

Qualitative methods first — these are the ones most often combined with in-depth interviews in a single study.

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