Reframing Infrastructure Spend as Unit Economics: Compare Cost per Transaction, Not Totals

The problem: the buyer sees a bigger bill, not a better ratio

Your platform costs more per month than the alternative, and the procurement lead has already circled the line item. Every slide you show compares totals. Totals only go one direction as the customer grows, so your price looks worse each time the volume rises.

The way out is to change the unit of comparison. Infrastructure spend is a cost of serving customers, and the number that matters is what each unit of business activity costs to serve.

Pick one unit the buyer already tracks

A good unit is something the business counts without your help: an order, a transaction, an active user, a processed document or an API call. Ask the buyer which one finance reviews. If they have none, offer two candidates and let them choose.

Then gather two figures from the buyer’s data: total infrastructure and operations cost for the workflow, and volume for the same period. Dividing one by the other gives their current cost per transaction. Do not use your own estimate for this baseline, since the buyer will defend their own figure far better than yours.

Show how the curve bends as volume grows

Architecture efficiency rarely shows up at today’s volume. It shows up when volume doubles. Walk through the scaling behavior that differs between the options: fixed overhead, manual operations that grow with headcount, and capacity that must be provisioned ahead of demand.

• Today: the baseline unit cost from the buyer’s data.
• At 2x volume: which costs stay flat and which grow.
• At 5x volume: where the alternative needs a step change in spend.

Label every assumption and keep the volume forecast the buyer’s own. If you cannot support a number with their data or a measured test, leave it out.

Handle the fixation on per-seat price

When a procurement lead anchors on seat price, do not argue. Ask whether seats are the driver of the buyer’s costs or whether volume is. If volume drives it, the per-seat figure is a small part of the real cost curve, and the conversation can move to the unit.

Decision and check

Decide which unit you will use and who on the buyer’s side owns the volume forecast. The check is that the buyer’s finance partner can reproduce your cost per transaction at today’s volume and at double volume using their own inputs. If they cannot, the model is not ready to present.

At SE Ignite, we teach this in a free curriculum built on the 80% philosophy: learn the few repeatable habits that carry most of the deals you will face.