Instrument (TKI):
1 TKI 
per Person

Did you know?
The TKI was first published 50 years ago — Since 1974, more than ten million TKIs have already been sold worldwide!
The Thomas-Kilmann TKI Conflict Model
Thomas-Kilmann TKI Model Diagonals
Link to TKI Landing Page

Take the Thomas-Kilmann Instrument (TKI assessment tool) from the person who actually co-created it: Dr. Ralph H. Kilmann. Ralph’s e-learning platform offers all his university research, online courses, and TKI certification.

If you want to read the most up-to-date and comprehensive information about the TKI tool in one single document, consider purchasing Ralph’s first TKI Book (published in 2023): Mastering the Thomas-Kilmann Conflict-Mode Instrument: Celebrating More Than 50 Years of Resolving All Kinds of Conflicts.


Just like “death and taxes,” conflict is inevitable! Why? Because no two individuals have exactly the same needs and concerns, conflict is a natural part of our interactions with others—whether in our personal life or in our organizational life.

The ONLINE Thomas-Kilmann Conflict Mode Instrument (TKI) will take you about 15 minutes to respond to all 30 items on the assessment—using a computer, laptop, or mobile device. Right afterwards, you can download your personalized TKI Report.

Click here to see: Sample TKI Profile and Interpretive Report.

Your personalized TKI results will reveal which of the five conflict modes you might be using too much or too little… or just right. With such enhanced self-awareness about your conflict-handling behavior, you’ll be able to easily recognize the most appropriate uses for each of the five conflict-handling modes depending on the key attributes of the situation, which will significantly enhance your skills for resolving all kinds of conflicts and problems—whether at work or at home.

Just so you know… the TKI has been the world-wide leader in conflict resolution assessment for more than forty years. Since 1974, more than 10 million copies of the TKI have been sold.

Taking the TKI assessment in different languages: If you wish to take an online TKI from Kilmann Diagnostics in Latin American Spanish, Brazilian Portuguese, Chinese (Traditional or Simplified), Japanese, or Swedish, you have two options: (1) taking your TKI in the chosen language, yet your TKI Report is provided in U.S. English or (2) taking your TKI in the chosen language and then downloading your TKI Report in that same translation. You can also purchase a TKI paper booklet or self-scorable TKI ebook from The Myers-Briggs Company in more than ten different languages. To learn more, visit: Translations for the TKI Assessment.

Watch our FREE, very informative, Videos About the Thomas-Kilmann Instrument and Your Conflict Resolution Skills. You can also read many Full-Length TKI Articles and TKI Blogs. Lastly, you’ll learn a lot from Dr. Kilmann’s question-and-answer exchanges: FAQs About the TKI Assessment.

NOTE: To make sure you are interpreting the TKI results accurately and that you are therefore using this assessment tool to its full potential, take our course collection and then earn your TKI Certification: The TKI Package of Three Courses on Conflict Management

ALSO NOTE: If you are interested in significantly improving the conflict-handling behavior of a group of 2 to 15 or so members, consider purchasing the TKI Team Report, which has been especially created just for that purpose. After each team member has completed their TKI assessment (either with the standard or with modified TKI instructions), each member will receive a personalized report that recommends exactly how the team as a whole can resolve its most challenging conflicts and thus improve its performance and satisfaction.


take the TKI on your laptop or desktop computer, or on your tablet or smartphone


average time to complete one TKI assessment on the publisher’s Elevate platform


download your personalized TKI Report as soon as you’ve completed the assessment


to ensure you are using the TKI accurately and to its full potential, take this course collection:

Kilmann Diagnostics Benefit 1

THE MOST KNOWLEDGEABLE EXPERT AT YOUR DISPOSAL: Dr. Ralph Kilmann is the co-author of the Thomas-Kilmann Instrument: If you have any questions about how to administer the TKI assessment or interpret your results, you won't be able to find another person who has more TKI knowledge and experience.

Kilmann Diagnostics Benefit 2

LEARN ALL ABOUT YOUR CONFLICT BEHAVIOR: The Thomas-Kilmann Instrument is a self-report assessment that allows you to discover whether you might be overusing (a high score) or underusing (a low score) one or more of these five conflict-handling modes: competing, collaborating, compromising, avoiding, and accommodating.

Kilmann Diagnostics Benefit 3

COMPARE YOUR RESULTS TO THOUSANDS OF OTHERS: To determine which of your TKI mode scores are high or low, your results are compared to a. U.S. research sample of 8,000 men and women who were drawn from a pool of 59,000 TKI respondents in order to mirror the demographic distribution of the U.S. population. A subsequent cross-cultural research sample of 6,000 men and women from 16 different countries revealed only minor variations from the U.S. norms. These rather surprising results demonstrate that the TKI is measuring an aspect of conflict-handling behavior that is fairly consistent across different countries and cultures.

Kilmann Diagnostics Benefit 4

THE TKI IS AMAZINGLY ACCURATE: One reason that TKI results have such cross-cultural consistency is because the assessment was purposely designed to minimize the “social desirability response bias” (which is the natural tendency for people in all societies to respond to test items in order to look good to themselves or to others). Consequently, TKI results provide an accurate picture—across the globe—of how people actually behave in conflict situations.

Thomas-Kilmann TKI Percentiles
TKI and Conflict Management Training Results 1
Online Thomas-Kilmann Instrument

Learning how to manage conflict more effectively is a vital skill for every human service professional who works with individuals, couples, groups, organizations, and/or nations. The TKI assessment, therefore, is relevant to all these OCCUPATIONAL IDENTITIES:

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Purchase the Online TKI

Only for Yourself—
Not for Anyone Else

When you click on the button at the bottom of this section, you’ll be adding 1 TKI, only for yourself, to your Shopping Cart, which you can then proceed to purchase on this website.

CAUTION 1: If you wish to purchase the TKI either for 1 other person or for a group of people—which might also include you along with the other members in your group—go to the next section on this page.

CAUTION 2: If you wish to purchase the PAPER version of the TKI assessment for yourself, which requires you to score, graph, and interpret your own results, you must go to The Myers-Briggs Company.


The price for 1 ONLINE TKI for yourself is $50. Once you complete your purchase, you have 90 days to take the TKI.

Please Note: As soon as you have completed your TKI on the publisher’s website, Elevate, you can immediately download your personalized TKI Report. At any time in the future, you can log back into your private Elevate account and download your TKI Report under the tab on your dashboard: DOWNLOADABLE ITEMS. In fact, at no extra charge, you can download your TKI Report as many times as you like.

Refund Policy: As stipulated in All Our Policies, within 30 days from the purchase date, if you happen to change your mind for any reason, just contact us and you’ll receive a full refund so long as you have not yet completed the TKI. But we do not offer any refund, in whole or in part, once this initial 30-day period has elapsed or if you have already taken the TKI assessment tool.



Thomas-Kilmann Instrument (TKI)
Purchase the Online TKI

For 1 Other Person—
Or for a Group

When you click on the button at the bottom of this section, you’ll be adding the online TKI to your Shopping Cart. In this section, you can make a purchase either for 1 other person or for a group of people (which, if you choose, can also include you).

However, the TKI will not be placed in your private account—unless (and not until) we receive your KD_Spreadsheet that includes your relevant information along with the same requested information about the other members in your group. See the section below: Completing Your KD_Spreadsheet.

CAUTION 1: If you wish to purchase 1 online TKI only for yourself (not for anyone else), go to the other section on this page that’s designed for that specific purpose.

CAUTION 2: If you wish to purchase the PAPER version of the TKI for 1 other person or for a group of people, which requires them to score, graph, and interpret their own results, you must go to the publisher’s website: The Myers-Briggs Company.



For 1 to 49 persons, each TKI is $50.00 per person.
For 50 to 99 persons, each TKI is $47.50 per person.
For 100 to 499 persons, each TKI is $45.00 per person.
For 500 to 999 persons, each TKI is $42.50 per person.
For 1000 or more persons, each TKI is $40.00 per person.

In the Quantity text box at the bottom of this page, enter the number of online TKIs that you wish to purchase for a group of participants (or leave the default as 1, if you are making this purchase for just 1 other person). If you enter 50 or more TKIs, the total charge will be based on the relevant quantity discount.

Then click on the button, ADD TO CART, so you can proceed to purchase your specified quantity of TKI assessments.

Completing Your KD_Spreadsheet

After you’ve made your quantity purchase, be sure to download the KD_Spreadsheet for Creating Group Accounts and carefully follow the instructions.

For example, if you are buying the TKI for one other person, fill out the spreadsheet for just that one person. If you’ll be taking the TKI along with other persons in your group, please make sure to also include YOUR information on the KD_Spreadsheet.

When you send your carefully completed KD_Spreadsheet to, also let us know your preferences for these four services:

  1. The date, time, and time zone when you want us to import your spreadsheet, which initiates the TKI process for your client(s) or group members.
  2. If you do NOT want to receive each separate TKI Report as soon as each of your clients completes their assessment. Otherwise, each TKI Report (as a pdf file) will automatically be emailed to you directly from the publisher’s website.
  3. If you want your clients to be able to Download their own TKI Report or… (b) if you want us to delete the download button for your group account, so only you (or a designated facilitator) can present your participants’ TKI Reports directly to them.
  4. If and when (the date, time, and time zone) you want us to send a Reminder Email (for this one time only) to your clients who have not yet completed their TKI assessment.

When we import your spreadsheet, every listed person will immediately receive an “account email” that provides your group’s unique PRIVATE LINK along with the step-by-step instructions for registering a private account on the publisher’s website and then taking the TKI assessment within the 90-day access period—which begins on the date when we import your spreadsheet. At that same time, we will also send you that same unique PRIVATE LINK with instructions, so you can email that information to your clients or group members—just in case they never received their account email from the publisher’s website (usually due to a very sensitive firewall).

Our Refund Policy and Expiration Policy

Refund Policy: As stipulated in All Our Policies, within 30 days from the purchase date, if you change your mind about using the TKI for any reason (if, for example, your training program gets cancelled), just contact us and you’ll receive a full refund for any unused TKIs. But we do not offer any refund, in whole or in part, once this initial 30-day period has elapsed or for any group members who’ve already taken the TKI assessment tool.

Expiration Policy: For most group TKI purchases, the number of persons listed on the spreadsheet will equal the quantity of TKIs that you just purchased. However, if you purchased a larger quantity of TKIs than the people listed on your spreadsheet (for the purpose of taking advantage of our quantity discounts), we’ll credit your group account with those extra TKIs, which we refer to as, “open slots.” But you’ll need to submit another (entirely new) KD_Spreadsheet when you know the participants who’ll be making use of those open slots in your account, which then initiates their 90-day access period for completing the TKI assessment.

Those “open slots” in your group account can be assigned to participants any time within ONE YEAR of the purchase date, after which, those “open slots” officially expire. But either before—or after—those slots expire, you can take advantage of our Renewal Policy to reactivate those open slots for one more year by paying 50% of the current price of that online product on our Special Payments page.

Managing Your Group Account

After you’ve sent us your carefully completed spreadsheet (which includes letting us know your preferences for the four services in the previous section), you can then manage your group account all on your own—which is the standard practice for the great majority of our TKI Buyers.

Nevertheless, we offer two additional services for your TKI project, which we have conveniently included in our Extra Services Bundle. However, since these two extra services are time-consuming for us to manage on your behalf, we charge $25 for each Extra Services Bundle (see purchasing details in the next section).

NOTE: If you purchase 10 or more TKI assessments at one time, one Extra Services Bundle is automatically included in your group account.

After you’ve automatically been assigned (or purchased) an “Extra Services Bundle,” when you send us your carefully completed KD_Spreadsheet, also let us know your preferences for these two extra services:

  1. If and when (the date and the time, between 8 a.m. and 6 p.m. Pacific Time) you want us to email you 1 Status Report that lists all those participants in your group account who have—or have not—completed their TKI assessment.
  2. If and when (the date and the time, between 8 a.m. and 6 p.m. Pacific Time) you want us to email you 1 Zip File that includes the TKI Report of all the participants in your group who have already completed their TKI assessment.

If you’d like to receive more of these two extra services for your group account, you’ll then have to purchase additional Extra Services Bundles on our website.

Purchasing an Extra Services Bundle

If you wish to purchase one or more of the Extra Services Bundle, please visit Special Payments, scroll down to the bottom of that page, enter the total amount for one or more Extra Service Bundles ($25 multiplied by the number of Bundles), and then complete your purchase. When the text box appears, Order notes, please enter: 1 Service Bundle for TKIs, 2 Service Bundles for TKIs, etc.


BASIC Training for the Thomas-Kilmann Instrument (TKI)

BASIC Training:
Discover the full
potential of the
Instrument (TKI)

During our two-hour course, BASIC Training in Conflict Management, not only will Dr. Kilmann help you interpret your TKI results, but you’ll also learn how to interpret other people’s results. Taking this course is the best way to make sure you are accurately interpreting TKI results—and using this assessment to its full potential. Click on the link below to learn how you can gain the most value-added knowledge from an individual’s Thomas-Kilmann TKI results.

  • PLEASE NOTE: This ADD TO CART button is for purchasing a single TKI assessment ONLY FOR YOURSELF—and for no one else. However, if you had intended to purchase a TKI assessment for ONE OTHER PERSON or for SEVERAL OTHER PEOPLE, then click on the ADD TO BUTTON on the other side of this purchasing section.

    If you would like to purchase the TKI TEAM Report for 2 or more team members (and NOT the TKI Individual Report), then go to the TKI TEAM Report Purchase Page to make your purchase.

    To purchase the TKI INDIVIDUAL Report ONLY FOR YOURSELF, click on the button below to complete your purchase:

    One TKI Per Person


    SKU: TKI Category:
  • PLEASE NOTE: This ADD TO CART button is for purchasing the TKI INDIVIDUAL assessment for ONE OTHER PERSON or for SEVERAL OTHER PEOPLE.

    CAUTION: There is no TKI TEAM report(s) or any Team Results Charts included when you purchase the TKI INDIVIDUAL assessment for a group of participants. If you make the quantity purchase from this page (starting at $50 per TKI Individual Report), you will have to create your own summary statistics and summary charts for a group or team.

    If you had intended to purchase the TKI TEAM Report for 2 or more team members (and NOT the TKI Individual Report), then go to the TKI TEAM Report Purchase Page to make your purchase.

    To purchase the TKI INDIVIDUAL Report (and NOT the TKI Team Report), add the quantity you wish to purchase and then click on the button below.

    One TKI Per Person – Group Purchase


    SKU: TKI - Group Category: