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B2B Sales · 8 min read

B2B business case and value selling: value in numbers, without making them up

How to build a business case the CFO takes seriously: cost of the problem, value levers, investment, payback, stated assumptions.

Updated October 6, 2026 · MAPS editorial team
In brief

A B2B business case shows the value of a proposal in numbers, in the customer’s terms: what the problem costs today, which levers the solution moves, how much is invested, how long until payback. Value selling is the approach that puts this value at the center of the sale. A credible business case states its assumptions and separates data from estimates.

What it contains

  • The cost of the problem — today, with the assumptions it rests on.
  • The value levers — costs avoided, additional revenue, reduced risk; each one marked as data or estimate.
  • The investment — price, implementation, the customer’s internal costs.
  • Total cost and payback — how long until value exceeds the investment.
  • Sensitivity — what happens if an assumption changes.
  • The numbers to ask for — the ones only the customer has, and whom to ask.

How to build it

  • Start from the customer’s pain and metrics, not from product features.
  • Use their numbers when you have them, and state your estimates when you don’t.
  • Show a range, not a single number: conservative, expected, optimistic.
  • Build it with the customer: a business case written together is more credible than one handed over.

The most common mistakes

  • Made-up ROI. A spectacular number with no source loses the CFO’s trust.
  • Value expressed as features. “Faster” isn’t a number.
  • Forgetting the customer’s internal costs. Time, training, process change.
How MAPS does it

In MAPS’s ABM & Sales Studio the Business Case engine (Value Selling) builds on the Challenge and constructs the cost of the problem with its stated assumptions, the value levers — each marked data or estimate —, investment, total cost, payback, and what happens if an assumption changes. It closes with the list of numbers to ask the customer for, with the role to ask. No made-up ROI. The numbers you upload in your materials — price lists, case studies — are read by this very engine.

The Business Case in MAPS: cost of the problem, value levers marked data or estimate, investment, payback

Frequently asked questions

What’s the difference between a business case and ROI?

ROI is a number: the return on investment. The business case is the full reasoning that produces it, with the problem, the levers, the assumptions and the sensitivity.

How do you build a business case without the customer’s numbers?

With estimates stated as such, based on industry data, and with the list of numbers to ask the customer for to make it precise.

Who should read it?

Above all the economic buyer and the CFO, but the champion should know it and be able to defend it.

Written by the MAPS editorial team with the help of AI, checked and reviewed by the team.

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