Licence and terms
This licence is the agreement between you and the seller, Stephen Register, sole proprietor, trading as Marginrule. It covers the Marginrule Pricing Workbook, the Marginrule Pricing Workbook Lite and the free calculators on marginrule.com.
It is our own grant of use, made by the seller. It sets what you may do with the files. Payhip's default end user licence doesn't govern how you may use these files. Payhip provides the checkout and delivery only.
You agree to this licence when you tick the box at checkout or download the free Lite workbook.
The licence we grant you
When you buy the workbook, we grant you a licence to use it that isn't exclusive and can't be transferred. The same goes for Lite when you download it.
Business and commercial use is allowed. Use it in your own business, including for products you sell and for prices you set for clients you work with.
Let people who work in your business use it, such as staff or a bookkeeper.
Change it as much as you like and keep copies and backups for your own use.
One purchase covers one business. If you run more than one business, buy one copy for each.
What you can't do
Sell, share or give away the workbook, or a copy of it, changed or not.
Put it in a template pack, course or bundle, or upload it anywhere others can download it.
Pass it off as your own work.
The free Lite workbook
The same licence applies to Lite. You may link to the Lite page on marginrule.com, but please don't host the file yourself.
The calculators on this website
You can use the calculators and read the fee pages for free. You may quote a fee or a worked example if you link back to the page it came from. Please don't copy whole pages or the fee data in bulk to republish them.
How purchases work
Payhip provides the checkout page and sends the download link. Payhip checkout pays into the seller's PayPal account, including card payments made through PayPal. Refunds are issued by us, the seller, through PayPal, as set out on the refunds page at marginrule.com/refunds.
Updates
If we fix a mistake or update the fee presets, we may send a new version to past buyers through Payhip. We don't promise updates for any set period.
No guarantee on results
The workbook and the calculators do the math on the numbers you enter. Platform fees change, and your own rates may differ from the presets. Check each platform's fee page before you set prices. Sales tax is never counted as profit. VAT, shipping, ads, currency conversion and monthly plan fees are not included. This is a calculator, not tax, legal or accounting advice.
The workbooks and calculators are provided as they are. To the extent the law allows, we are not liable for losses that come from using them, and our total liability to you is limited to what you paid for the workbook. Nothing here limits rights you have under the consumer law where you live.
Changes to this licence
If this licence changes, the date below changes too. The licence in place when you bought applies to that purchase.
Questions
Email help@marginrule.com.
This licence is governed by the laws of the State of Florida, United States.
Marginrule. Last updated 14 Nov 2026