A Buyer Wants ROI Proof: Build an Honest Decision Case

Understand the situation before responding

Find out which investment question the buyer needs to answer. They may require a cost comparison, payback estimate, operational benefit or evidence of feasibility. Ask what baseline they can actually measure. Distinguish cash savings from time released, and revenue potential from realised profit. A team saving an hour does not automatically remove a salary cost. Avoid using generic industry numbers to pretend you know the buyer financial situation.

An example message to adapt

What decision does the return calculation need to support, and which baseline figures can your team verify? We can separate measurable costs from assumptions and examine a conservative scenario. I cannot guarantee the resulting return, but I can make clear what would need to happen for the investment case to hold.

Illustrative teaching example. Replace the prompts with buyer-confirmed facts; this is not a client conversation, claimed result or message to send automatically.

Prepare a useful next action

List inputs, source, owner and uncertainty. Show the proposed investment alongside implementation effort and ongoing costs. Use a range or sensitivity check where assumptions materially affect the answer. Identify what depends on client adoption, sales conversion or other factors outside your control. Where you have a genuine relevant case study with permission, explain its context and limits rather than implying the same result will recur.

Record the decision and its limits

Agree how the buyer will assess success and which evidence is still missing. If a pilot could answer a specific uncertainty, define that question and the evaluation criteria before proposing one. If the claimed benefit cannot be substantiated, reduce the claim or reconsider the offer. A credible case may support a decision to proceed, defer or decline; the purpose is clarity rather than manufacturing an attractive number.