How to Calculate ROI Before Buying an AI Tool
By the Lucero Editorial Team \u00b7 Updated 2026-08-08 \u00b7 4 min read
TL;DR
A rough ROI estimate compares the subscription cost against realistic time saved multiplied by an hourly value of that time. If the payback period is longer than a few months, the tool is a harder sell than it first appears.
Estimate time saved honestly
Overestimating time saved is the most common mistake. Track actual usage for a week or two before committing to a number.
Multiply by a realistic hourly value
Use your actual hourly cost or opportunity cost, not an inflated number, to keep the estimate credible.
Compare against the subscription cost
If monthly time saved times hourly value clearly exceeds the subscription price, the case is straightforward; if it is close, the tool is riskier.
Factor in the learning curve cost
The first few weeks of adopting any tool cost time before they save it. Include this in the estimate rather than assuming instant productivity.
Frequently asked questions
What if the time savings are hard to measure directly?
Track a proxy, like how many fewer hours a specific weekly task takes, rather than trying to measure everything at once.
Is ROI the only factor worth considering?
No. Team adoption and ease of use matter too, as covered in how to choose the right AI tool for your team.
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