If you operate a business in New Zealand (NZ) like me, chances are you too need to calculate GST on purchases & sales. Today, let me share the excel formulas needed to calculate GST as per NZ laws. I have also attached a free GST calculator template to help you if you are in a hurry.
How to calculate NZ GST using Excel?
Assuming you have the sale price in cell C5, the GST is calculated by the below formula.
=C5 * 0.15We multiply the “sale” or “service” price by 0.15 (or 15%) as the official GST rate in New Zealand is 15% [ref].

Excel formula for NZ GST from “total” price
Let’s say you want to figure out the GST from total price (GST inclusive price) of something. This is quite common in retail scenarios. You have an item for $140 on the shelves, but you need to figure out what the GST should be on this. In this case, you can use the below Excel formula.
Assuming your “total” price is in cell C15, the GST is calculated with this formula:
=C15 * 15/115
GST Reverse Calculation – What is the “sale price” if I know GST?
Occasionally, we may have the reverse problem. We know how much the GST is, but just need to figure out the total. In this case, you can use the below formula.
Assuming your GST is in cell I5, the sale price can be calculated with below Excel formula
=I5*100/15
and total price can be calculated with this formula
=I5*115/15The 3 / 23rds and 3/20ths rules
Here is a handy shortcut to quickly figure out the GST from total or sale prices.
3/23rds rule – GST from total
If your total amount is known, just multiply that with 3 and divide by 23 to get the GST.
For example, if your total is $230, then GST would be $30.
=230 x 3 / 23
=690 / 23
=303/20ths rule – GST from Sale Price
If you know the “sale” price, just multiply it with 3 and divide by 20 get the GST.
For example, if your sale price is $140, then GST would be $21
=140 x 3 / 20
=420 / 20
=21GST for hourly rates, services
If you work as a plumber / electrician / some other type of service provider and you charge by hour, then you can use below formulas for calculating GST.
Assuming your hourly rate is in cell I15 and hours worked in cell I16, the GST formula looks like this:
=I15*I16*0.15
FREE NZ GST calculator workbook

I have created a simple, plug-n-play GST calculator workbook for you. Please download it here, enter your price / total / hourly information and the file automatically calculates the GST for you. It also has the GST formulas / patterns that you can apply to your own data.
Click here to download the NZ GST Calculator.
Need Spreadsheet help?
If you are an NZ business and need spreadsheet help or automation services, please get in touch with me. I am a Wellington based Excel / automation expert and I have been helping clients for the past 15 years in creating simple & easy automation and Excel solutions. Please email me on hello@chandoo.org to discuss more.













27 Responses to “9 Box grid for talent mapping – HR for Excel – Template & Explanation”
Great stuff! I can understand how to add a slicer to the pivot table, but how do you implement the departmental selector on the 'Filter' formula scheme?
Just saw this on your Youtube channel, and it’s areat idea...!
An easy way to overcome the "ugliness" of pivot tables and get it to look nice (in the format of the Output sheet), would be to simply build a sheet with the nice map at the top, a pivot underneath it and a slicer next to formatted map and then reference each of the 9 cells in the formatted map to the “related” cell in the Pivot.
Keep up the good work!
/Claus
Thanks Claus. That is a great idea 🙂
Hi Chandoo,
This is great! Curious how to make additional columns operate the same as the Department column (ex. have a "manager column") that would allow you to sort a 9 box by manager, area, or team in addition to department?
Feel free to email me if needed! mfry01@minnetronixmedical.com
Happy New Year
Madison Fry
I am curious about the smae thing. I would like to populate the 9 box with other views as well by adding additional columns. IE., I would like to add location, region, etc. Thank you.
This is great, thank you!
How can i see the whole data set of all the teams in the output table. Need a formula that will pick up all the employees
Hello,
Love the template. Thank you. Question - the drop down to pick a department on the Output tab does not seem to work on the downloadable template. Am I doing something incorrectly?
Thank you!
Hi Heather... Thank you. I am using Excel 365 to make the calculations. If you are using an older version of Excel, then the drop-down filter won't work.
Hi
I was able to follow your 9 box grid and modified based my needs. However, you tutorial did not show how to you create the filter for the "Pick a department. Can you kindly share how to create that filter that updated the grid. Thank you.
I am working on this project but I am struggling with the data validation for the department. I copy the worksheets data entry and output as the managers want to see different tabs for each managers.
I updated the source reference for each tab but It does not update the grid based on the new source. The list was updated but it does not populate the grid based on the performance and potential listed.
In addition the hyperlink Update Data and View Talent Map no longer works. Can you please help me.
I keep getting this error message in the pivot table:
This formula is invalid or incomplete: 'The expression is not valid or appears to be incomplete. Please review and correct the expression.
The following syntax error occurred during parsing: Invalid token, Line 1, Offset 14, ‘.
Hi, I used your 9-box excel template with excel 365. First off, thank you so very much. It is incredibly helpful!! My only question is that the boxes aren't big enough for all of the employees (specifically the middle which we call 'Core Employee'). Is there a way to make the boxes larger? Even though it is in excel, I am not able to increase row height (like I normally do in a speadsheet). Any ideas? Thanks again, Jody
Hi Chandoo,
Thanks for the great content. Re. 9 box grid, pls advise how do I increase the size of the box to accommodate more names?
Hi Chandoo,
I figured it out. Excel 365 has the format row height on the ribbon. Thank you
Merci Chandoo pour le modèle proposé,
j'ai une question et un souhait est il possible de développer davantage ce modèle en insérant la photo de chaque employé.
Hi Chandoo!
Great tutorial and tool, thank you! Your tutorial didn't include how to create additional filters on the "Output" tab. Could you please share how you did it?
Can this be done exactly in google sheets?
Hi Chandoo,
Thanks for the video it was really helpful. Is there any way to multi select the dropdown to display multiple or all departments rather than just one at once?
Hello Prish
I have Microsoft 365 and I am struggling to make the boxes larger/unable to increase row height; any idea how you made this work? Specifically in the Output tab where the map is?
Many thanks
Hello Jody, I have Microsoft 365 and I am struggling to make the boxes larger/unable to increase row height; any idea how you made this work? Specifically in the Output tab where the map is? Many thanks
Is there a way to change the 9 box wording descriptions, i.e. Work Horses, to our own internal langauge?
You can edit the file. The descriptions are textboxes.
Hi Chandoo, this is awesome and has worked perfectly. Due to a big organisation the 9 box grid on the output file is too small. I tried adjusting using the row/width ribbon under the format ribbon however it doesn't seem to work. Is there an easier way to adjust this?
Thanks!
When I drag the formula, it doesn't work, and the order I use with the data changes. In the beginning, the order is it is " candidates," " potential," and " performance," but when it goes to another column, it is " Potential," Performance," and "Candidates."Can you help me? Thank you very much, sending love from vietnam
Hi- I am working on the 9 grid project and I am trying to expand the box since I have over 100 names on a few of the columns. How do I do that?
Hi, Thank you this is great stuff and really useful.
As well as department as demonstrated on your clip, how can I display all candidates on the grid at once?
Many thanks in advance