A spot buy is a one-off purchase made outside any contract or catalogue, usually because something is needed quickly. Spot buy procurement leaks money in three predictable ways: nobody competes the price, new vendors are added without checks, and orders get split to stay under approval limits. The fix is not a heavier process. It is a small set of rules that make the controlled route faster than the workaround.
What counts as a spot buy?
A spot buy has three features. It is not covered by an existing agreement, it is unlikely to repeat in the same form, and it is usually urgent enough that the requester wants it this week rather than after a sourcing exercise.
Typical examples:
- a replacement part for an older machine that the usual supplier does not stock
- a specialist service needed once, such as a survey, a calibration or a repair
- event materials, signage or furniture for a single occasion
- an urgent order to cover a shortfall while a contracted supplier catches up
Spot buys are not a failure of planning. Every business has them, and some categories will always be bought this way. The problem is not that they happen. It is how they happen.
Why do spot buys leak money?
Because the usual controls are designed for planned purchases, and spot buys arrive without warning. Under time pressure, people take the shortest path, and the shortest path skips the parts of procurement that protect price and risk.
No competition
The requester knows a supplier, or finds one online, and asks for a single quote. That quote becomes the price. Nobody checks whether another supplier would have done the same job for less, or delivered sooner, or offered better terms. Over a year, a long run of uncompeted small purchases adds up to a meaningful premium that never shows in any single report.
New vendors without checks
Each spot buy can create a new supplier record. Some are fine. Others have never had their trade licence, tax registration, bank details or basic capability verified. The vendor master grows, duplicates appear, and finance ends up paying invoices from companies nobody in procurement has looked at.
Split orders
When the approval threshold feels like an obstacle, a large need gets broken into several smaller orders that each fall just under it. Sometimes this is deliberate, often it is just habit. Either way, the purchase escapes the scrutiny its real value deserves, and the business loses the volume it could have negotiated with.
Paying for urgency
Rush delivery charges, premium pricing and poor payment terms are easy to accept when the need is urgent. Some urgency is real. Much of it is created by a slow internal route that makes people wait until the last minute, then buy in a hurry.
How do you keep spot buys fast and controlled?
The rules below are deliberately light. Each one closes a leak without adding a step that would push requesters back to buying around the process.
Give spot buys their own route
Requesters need one obvious place to send an unplanned need, in plain language, without filling in a requisition built for procurement experts. If that route does not exist, people will invent their own. Our guide to managing unplanned purchases covers how to design it.
Compete every request by default
Make competition the default, not an option. Even a quick round with a few qualified suppliers is enough to expose an outlier price. The point is not a full tender. It is that no spot buy is priced by a single quote unless there is a written reason, such as a sole source.
Check new vendors before the first order
Agree a short vendor check that runs before any new supplier is paid: trade licence, tax registration, bank details and a basic capability review. Better still, start from a pool of suppliers that are already vetted, so most spot buys never need a new vendor at all.
Set approval by need, not by order
Approval should follow the total value of the need, not the value of each order. Flag orders to the same supplier, for similar items, within a short window, and review them as one. Once people know split orders are visible, most of them stop.
Agree a value ceiling
Decide the order value up to which the spot buy route applies. Below it, the fast route with competition and vendor checks. Above it, normal sourcing with the category team. Our article on setting a tail spend threshold explains how to choose the line.
Write down the service level
If the controlled route takes longer than the workaround, the workaround wins. Put response times in writing, measure them, and fix the route when it slips. A fast route removes the false urgency that leads to premium prices.
Which spot buys should move to a catalogue?
Review the spot buy history every quarter. Items that keep coming back are not really spot buys: they belong in a catalogue with agreed prices, where buying them takes a click and no quote. What remains after that review is the genuinely one-off work, and that is what the spot buy route is for.
Where does METIS fit?
METIS gives spot buys the route described above. A requester describes the need in plain English by chat, email or a document. AI agents find suppliers, issue the RFQ, score the bids on price, delivery, terms and supplier risk, and negotiate inside limits you set. The result goes through your own approval chain, and the purchase order is issued with an audit trail. Recurring items move to the catalogue, and the exceptions go to a Buying Desk.
What to do next
- Pull a year of purchase orders, card spend and expense claims, and mark which were spot buys. Note how many had a single quote and how many created a new vendor.
- Look for split orders: the same supplier, similar items, close dates, values just under a threshold.
- Agree the spot buy route, the value ceiling and the vendor check, and write them down.
- Move repeat items into a catalogue.
- Measure cycle time on the new route from the first week, and make it faster than the workaround.