Glossary
What is Tail Spend?
Last updated July 2026
Tail spend is the large number of small, fragmented purchases — often the bottom 20% of spend across 80% of transactions — that rarely gets managed and leaks value.
Also known as: tail-end spend, long-tail procurement
MRO is a classic tail: only 5–10% of COGS but 70–80% of procurement transactions. The process cost and off-contract leakage far outweigh the line-item value.
Because it's high-volume and low-value per event, tail spend is exactly where automation and fair-value benchmarking pay off fastest.
20–30% of indirect spend leaks to maverick buying.
Sources: McKinsey (via GEP), Centerpoint Group
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