Tail spend calculator
Paste supplier and amount lines from your accounting export. The calculator sorts suppliers by spend, finds the ones that cover 80% of it, and shows what's left: the tail, in money and in supplier count.
Nothing you paste here leaves your browser.
How the tail is found
Suppliers are sorted from biggest to smallest. Starting at the top, they're added up until they reach the head share, 80% by default. The supplier that crosses the line counts as head. Everyone after it is the tail.
With the sample data, 3 of 13 suppliers make up the head, and the other 10 suppliers are the tail: about 12% of the money and 77% of the supplier list. That's the usual shape. The tail is small in money and large in the number of suppliers, purchases and approvals someone has to handle.
Getting the data
Most accounting tools export spend by vendor for a period. Keep two columns, supplier and amount, and paste the lines. A header row is skipped, and the same supplier on several lines is added together.
What to do with the tail
The tail is the purchases nobody negotiates: office supplies, a part for a site, equipment for a new starter. Atta is built for that spend. Requests come in from chat, the agent buys within the rules you set, and every purchase lands on one record. See tail spend management.
Questions
What is tail spend?
The part of spend spread across many small suppliers and purchases, usually defined as what's left after the suppliers that make up 80% of spend.
Is my spend data sent anywhere?
No. It's parsed and added up in your browser.
Related
- Tail spend management for small, frequent purchasesTail spend is the long run of small purchases nobody sources. Atta takes them in chat, applies your approval rules and keeps a record for each one.
- What is tail spend?Tail spend is the many small, infrequent purchases that add up to a fifth of spend but get no procurement attention. Definition with a worked example.
- What is spend under management?Spend under management is the share of total spend that flows through a managed process with contracts, approvals and visibility. With an example.