This Excel based Customer Lifetime Value Estimator will allow you to estimate, not just lifetime value, but how it changes based on different variables in your business.
This tool:
Has been used in University Business schools
Estimates the ROI of customer retention investment
It is based on MS Excel but contains no macros
Please note that the Net Promoter Comparison Tester is provided on an as is basis and Genroe accept no liability for its use in any way whatsoever.