Financial & Enterprise
Design ROI Calculator
The business case for design, as a tool
By Hiram BarskyFounder & Principal Designer
Role
Product Design · Full-stack · AI
Timeframe
2026
Published
August 2026
Outcome
Live at roicalc.site
Built with
In-house, AI-assisted · Figma Design · Claude Code · Netlify
The result
Live at roicalc.site: enter your before-and-after design metrics and get a defensible business case — total value, ROI, payback, a transparent calculation, conservative-to-optimistic pressure-tests, and CFO / CPO / CEO talking points ready to paste.
Overview
“Prove the ROI of design” is the hardest ask in the field — and most designers answer it with a screenshot and a hopeful adjective. This tool answers it in the language budgets are actually decided in: enter your before-and-after metrics and it returns total business value, ROI, payback, and a pitch you can hand a CFO.
The problem
Design loses budget arguments it should win, because the argument happens in finance terms and designers show up with craft. A portfolio proves you can do the work; it doesn’t prove the work was worth the money. Without a defensible number — revenue, payback, a model that survives scrutiny — “good design” stays a matter of taste, and taste gets cut first.
Research
Talk to designers about proving their value and the same three walls show up every time — none of them about the design itself.
Design gets cut in rooms it isn’t in
Budget decisions happen in finance language. Craft screenshots don’t translate; revenue, payback, and ROI do.
→ Drove: Outputs framed as business value and payback — not before/after mockups.
Borrowed stats get dismissed
Generic ‘$100 back for every $1’ claims collapse under one skeptical question. The number has to be yours.
→ Drove: Your own before/after inputs plus a visible calculation methodology, so the figure is defensible.
A number isn’t a pitch
Even a strong ROI figure dies without a narrative — and each stakeholder cares about a different thing.
→ Drove: Tailored CFO / CPO / CEO talking points, plus scenario modeling to disarm “what if you’re wrong?”
The approach
- 1
Turned the whole business case into a fill-in model: two numbers — traffic and average order value — scale everything, then you enter each UX metric before and after (conversion, task success, satisfaction, accessibility) and the tool computes revenue, cost savings, payback, and ROI.
- 2
Made it honest by design, because a number no one can check gets waved away. It loads a worked sample so you see the output first, labels every template value as illustrative — not a measured average — and shows the exact calculation, so the result reads as evidence, not a boast.
- 3
Built the last mile most calculators skip: sensitivity analysis that names which metric actually drives the result, scenario modeling (conservative / realistic / optimistic) to pre-empt pushback, and stakeholder talking points tailored to a CFO, CPO, and CEO — ready to paste.
Our thought process
The hardest sentence in design is “here’s what it was worth.” we built the tool we always wished we had walking into a budget meeting — one that turns a designer’s outcomes into a case a finance team can’t hand-wave away.
What didn’t work
The first version just spat out one big number. It got waved away — a figure with no method reads as a guess, and a guess loses to a spreadsheet. The turning point was making the math visible and forcing real inputs: trust came from transparency and ‘these are YOUR numbers,’ not from a bigger, bolder total.
The outcome
A shipped, live tool that takes a designer from “I improved conversion” to “$1.8M in business value, a 41x return, six-day payback — and here’s the CFO version of that sentence.” The business case for design, no longer improvised in the meeting.
What this means for your project
Struggling to prove design’s value to leadership, a board, or a client? That’s the problem this tool exists to solve. We turn UX outcomes into the language budgets are decided in — revenue, payback, and a model a finance team can’t wave away.
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