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Payback in months, not slides: reading a vendor ROI claim

How the maths is built, and which line usually goes missing.

12 min read·Published 5 March 2026·Sourced · 4 references

Every payback slide is a model wearing the clothes of a fact, and a model is only as honest as the assumptions loaded into it.

Every ROI claim is a model

A vendor’s payback-period claim compresses labour cost, uptime, service cost and install time into a single number. Change any one input and the number moves, sometimes by months — which is why the same category of machine can carry a short payback in one deck and a much longer one in an operator’s own recalculation.

None of that makes the claim dishonest. It makes it a model, and a model is worth reading for its assumptions before it is worth reading for its headline number.

“A payback slide with no assumptions listed is not a calculation — it is a marketing number wearing a spreadsheet’s clothes.”
Operator, logistics site · Europe

The gap between a vendor’s model and an operator’s outcome usually sits in one predictable place.

The line that usually goes missing

Integration time, spare-parts logistics and the labour needed to supervise a machine through its first months rarely appear in the same slide as the payback number. A worked example published by an industry body — dated, sourced, and built from real deployment data rather than a single vendor’s projection — will usually show a longer runway to payback than a sales deck does, precisely because it counts the lines a sales deck leaves out.

None of that is a reason to distrust every ROI claim. It is a reason to ask which costs were modelled and which were assumed away, before comparing one number to another.

WHAT TO TAKE AWAY

  • Ask which inputs built the payback number — labour rate, uptime, shift length — before trusting the headline.

  • Integration time and spare-parts logistics are the lines a sales deck most often leaves out.

  • A dated, sourced worked example from an industry body is worth more than an unpublished vendor projection.

  • Rebuild the calculation with your own site’s numbers before comparing it to anyone else’s.

The maths only becomes useful once it is rebuilt around a specific site, not a generic one.

Rebuilding the maths on your job

A vendor’s model is usually built on average shift lengths, average labour costs and an assumed uptime that may not match a specific floor. Rebuilding the same calculation with the buyer’s own numbers — their shift pattern, their labour rate, their site’s realistic uptime — is the only version of the payback period worth acting on.

The rebuilt number is rarely as clean as the one on the slide, and that is exactly the point: a payback period that survives contact with a real shift is worth more than one that only survives a pitch.

EDITORIAL RULE

Sourced or silent. Every figure on this page carries an attributed, dated source. Where we could not source a number, we left it out rather than estimate it.

SOURCES

  1. 01IFR World Robotics 2025Oct 2025
  2. 02Grand View Research 2025Market sizing & methodology
  3. 03Manufacturer price listsJan–Mar 2026
  4. 04Operator interviewsMilan, London, Abu Dhabi · Q1 2026

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