Take the Popular
Instrument (TKI)

Discover which conflict modes you’re using too much or too little, so you can improve your conflict resolution skills
The Thomas-Kilmann TKI Conflict Model

Take the TKI from Ralph Kilmann: The Co-Creator of this Assessment Tool

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 all our interactions and activities with other people.

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.

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 worldwide leader in conflict resolution assessment for more than forty years. Since 1974, more than 8,000,000 copies of the TKI have been sold worldwide.

Why purchase the TKI from Kilmann Diagnostics? 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, no other person has more TKI knowledge and experience!


Enter your email address and you’ll receive Dr. Kilmann’s article:
“Celebrating 40 Years with the TKI Assessment:
A Summary of My Favorite Insights.”

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Your privacy is very important to us.
We’ll never share your information.

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: 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.


The price for 1 ONLINE TKI for yourself is $45. Once you complete your purchase, you have 90 days to take the TKI assessment and download your personalized TKI report.



One TKI Per Person


SKU: TKI Category:
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: 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.



For 1 to 49 persons, each TKI is $45.00 per person.
For 50 to 99 persons, each TKI is $42.50 per person.
For 100 to 499 persons, each TKI is $40.00 per person.
For 500 to 999 persons, each TKI is $37.50 per person.
For 1000 or more persons, each TKI is $35.00 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 groups@kilmanndiagnostics.com, 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. At the 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).

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.


One TKI Per Person – Group Purchase


SKU: TKI - Group Category:
BASIC Training for the Thomas-Kilmann Instrument (TKI)

Our 80 Minute
BASIC Training:
Discover the full
potential of the
Assessment Tool

Watch our FREE, very informative, Videos About the Thomas-Kilmann Instrument and Your Conflict Resolution Skills. You can also read several Full-Length TKI Articles and TKI Blogs. You’ll also learn a lot from Dr. Kilmann’s question-and-answer exchanges: FAQs About the TKI Assessment. Lastly, for more detailed information about the benefits of taking the TKI assessment tool, you can also visit our website’s unabridged TKI Purchase Page.