AI ROI Calculator
What is AI actually worth to your team?
Estimate the monthly value of AI-assisted work against what it costs to run, whether you buy seats for your team or pay per use for Claude, GPT, Gemini, Grok or Llama. Adjust the inputs to match your team.
Not sure where to start?
Describe your team and we'll fill in the calculator
Who they are, roughly how many, and what work takes up their week. Don't include names or anything confidential. Your description is sent to an AI model to suggest figures; it isn't stored.
What we assumed
These are starting points. Adjust anything below that doesn't match your team.
Your team
Fills in typical figures for that kind of team, which you can then adjust.
How many people on the team would use AI tools day to day.
What an hour of one person's time costs the business: salary plus employer NI, pension and overheads, divided by hours worked. As a guide, a £50,000 salary is about £38 an hour fully loaded.
AI providers price in US dollars; GBP figures use a fixed approximate exchange rate.
Only the work AI is suited to, such as drafting, summarising, research, analysis or code. Not their whole working week.
At 30%, a 10-hour task takes 7 hours. Start cautious: early gains are often smaller than expected.
How you'll pay for AI
Most teams buy a subscription such as ChatGPT, Claude or Copilot for each person. Pay as you go means paying per use through an AI provider's API, usually for tools you build or buy on top of it.
Used for the cost figures. Every model is compared in the chart.
Each prompt sent to the AI counts as one. 25 a week is about five a day.
AI is priced per token, roughly ¾ of a word. "Sent" is your prompt plus any documents or context you include; "received" is the AI's reply. 1,000 tokens is about 750 words, or a page and a half.
Anything else you pay each month for AI, such as other tools, or support and training you want to spread across the month.
All figures are estimates for illustration, not a quote. Prices are list prices, with no volume discount.
Estimated monthly outcome
Monthly benefit after AI costs
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Value of time saved
Hours saved × hourly cost
Monthly AI cost
Seats plus other costs
Hours saved a month
Across the whole team
How this is calculated
- Hours saved = people × hours a week on AI-suited tasks × how much faster AI makes them × 4.345 weeks a month.
- Value of time saved = hours saved × cost of one hour. This is time freed up, not cash saved: it becomes value when the team spends it on other work.
- Monthly AI cost, per-seat subscription = people × the plan's price per seat, plus other monthly costs.
- Monthly AI cost, pay as you go = for each kind of work ticked, people × requests a week × 4.345 × (tokens sent × input price + tokens received × output price), plus other monthly costs. The usage behind each kind of work is an estimate; tick "enter figures myself" to use your own.
- Benefit after AI costs = value of time saved − monthly AI cost.
It leaves out one-off costs such as rollout and training, and the time it takes a team to get up to speed.
Monthly AI cost by plan
From estimate to evidence
This is a model. FernAI measures the real thing.
We help organisations prove the financial return of their AI investment, with an auditable ledger that traces every figure back to the source data.
Talk to FernAILoading pricing source…