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Utility Lab · live calculation

AI ROI Calculator

Honest numbers, no vendor sales sheet. Enter people, hours saved, salary cost, tool cost and one-off setup. The calculator returns year-one savings, payback in months, three-year net value and a tier judgement on whether the case is worth taking to your board.

Your inputs

How many staff will use the AI tool as part of their job?

people

Be conservative — what does a sensible weekly time-saving look like once they're trained?

hours

Salary plus on-costs. UK SME knowledge worker is typically £25–£45.

£

How many of those people will actually use the tool well? Most projects land 50–75%.

%

Sum of all licence fees. Include any per-seat uplift.

£

Setup, integration, consulting, data prep. Use a realistic figure, not the vendor's best case.

£

Workshops, internal time, comms. The line item most underestimated.

£

All calculations run in your browser. Nothing you type leaves this page unless you choose to email yourself the result below.

Strong case
Annual benefit
£32,256
Year-1 cost
£17,000
Payback
6 mo
3-year ROI
234%
3-year net value
£67,768

These numbers stand up to a board challenge. Your remaining work is verifying the assumptions — particularly the hours-saved figure — with a two-week manual proof of concept before signing the contract.

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Simon receives the live numbers above plus your input assumptions, so the follow-up call goes straight to the weak points in the case rather than starting from scratch.

What gets sent with your enquiry
Tier: Strong case
Annual benefit: £32,256
Year-1 cost: £17,000
Payback: 6 months
3-year ROI: 234%
3-year net value: £67,768

Inputs:
  - People: 10
  - Hours saved per person per week: 3
  - Hourly cost: £32
  - Adoption: 70%
  - Tool annual cost: £6,000
  - Implementation: £8,000
  - Training: £3,000

How this is calculated

Assumptions in plain English

  • • Annual benefit = people × adoption % × hours saved per week × 48 working weeks × fully-loaded hourly cost.
  • • Year-1 cost = tool subscription + one-off implementation + training/change cost. Year 2 & 3 assume tool subscription only.
  • • Payback = year-1 cost ÷ annual benefit, expressed in months. 3-year ROI = 3-year net value ÷ total 3-year cost.
  • • Tier bands: Strong (ROI ≥ 200% AND payback ≤ 12 months), Workable (ROI ≥ 50% AND payback ≤ 24 months), Marginal (ROI ≥ 0%), otherwise Don't proceed.
  • • Designed to be conservative. The number that breaks most board cases is over-stated hours saved per person per week — sanity-check it with a two-week manual pilot before signing anything.
  • • All maths runs in your browser. Nothing is sent or stored unless you email yourself the result.

A weak business case kills more AI projects than weak technology.

Bring your ROI numbers to a free 30-minute call. We'll stress-test the assumptions and decide together whether the project is worth the risk.

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