Short answers about tail spend, the single creditor model, supplier consolidation, procurement outsourcing, e-invoicing and supplier payments. Can't find your question? Contact us.
Tail spend is the large group of small, non-strategic purchases outside your main contracts: spot buys, one-off services, C-items and web shop orders. It accounts for most of your suppliers and invoices but only a small share of total spend. Often 5% of procurement volume represents 50% of the supplier base.
A spot buy is a one-time or occasional purchase outside your existing contracts and catalogues, often from a supplier your organisation has never used before. Spot buys are a large part of tail spend.
C-suppliers are suppliers with low spend and low strategic importance, used once or a few times a year. They make up most of the supplier base but a small part of total spend.
The purchases are small, varied and spread over many suppliers, invoice formats and payment methods. Each one costs about as much administration as a large order, so the process cost is high and visibility is low.
Tail spend management is the approach and tooling to bring those small purchases under control: fewer suppliers, one buying process, digital invoices and clear reporting. Spot Buy Center does this as a managed service with its own software.
Read more: Tail spend for procurement teams · Tail spend ROI calculator
A single creditor is one external partner that acts as the creditor for all your low-value and one-off purchases. Your ERP holds one vendor instead of hundreds, and you receive one digital invoice flow with your PO numbers.
Both describe one approved vendor between your company and many small suppliers. With Spot Buy Center the single creditor also takes over sourcing, ordering, invoice checks and payment, not only the payment.
Yes. You pay Spot Buy Center on your own payment terms, and we handle payment and any discussion with the suppliers.
Non-strategic purchases outside your main contracts. Strategic and contracted suppliers stay in your own vendor base.
Read more: Single creditor services · For finance teams
Clients typically reduce their active supplier base by 50% or more, because small and one-time suppliers move to one creditor.
No. People can still buy from any supplier or web shop. The purchase simply runs through Spot Buy Center instead of a new vendor record.
No. Strategic and contracted suppliers stay with your procurement team. Consolidation targets the long tail.
Read more: Supplier consolidation
As much as you want. With Self-service you do the sourcing yourself; with Admin service we also handle the request administration; with Full service we take care of everything from sourcing to payment.
Yes. Our sourcing center finds suppliers and requests quotes for spot buys, and returns the offers to you or into your ERP.
Any non-strategic goods or services outside your main contracts, such as tools, equipment, services, events, IT accessories, spare parts and one-off requests.
You do. Your approval rules and budgets apply, and every order carries your PO number.
Read more: Procurement outsourcing · Service plans · Sourcing center
Yes. Since 1 January 2026 domestic B2B invoices between Belgian VAT-registered companies must be structured e-invoices, with Peppol as the main exchange network.
They invoice Spot Buy Center. You receive one structured digital invoice per order from us, with your PO number.
Digital invoices through your preferred channel, including Peppol, cXML, OCI and EDI.
Yes. Spot Buy Center connects to your ERP or purchase-to-pay suite, including punch-out from common purchasing tools, or runs as a stand-alone cloud solution.
Read more: P2P and e-invoicing · Our software
Yes. Spot Buy Center pays one-time and occasional suppliers for you, so you do not have to create, check and pay a new vendor for a single invoice.
Yes. We buy from suppliers and web shops worldwide and handle the payment.
Yes. Because all tail spend runs through one creditor, you can agree one longer payment term with Spot Buy Center instead of negotiating with every small supplier.
Read more: One-time vendor payments
A transparent overview of every transaction: what was bought, by whom, from which supplier and at what cost, linked to your PO numbers.
Yes. Every invoice carries your PO number and the data is digital, so it fits your ERP and reporting.
Read more: Spend visibility
We work for large organisations in Belgium, the Netherlands, France, Italy, Germany and the United Kingdom.
Yes. Our tail spend and purchase-to-pay platform OAZO was developed in-house. You can use it with our service or on its own, integrated with your ERP or stand-alone.
Contact us for a demo. We look at your current supplier and invoice data, propose a service plan and set up the integration with your systems.
Yes. Suppliers can join our network to sell to large companies through one contact, with B2B catalogues and correct, on-time payment.
Read more: About us · Contact · For suppliers
Contact us and get a demo that will change the way you see tail spend management.
As a partner, Spot Buy Center pools all your purchases and tail spend. Offering local knowledge and immediate availability. We handle everything from buying and digital invoicing right through to aftercare.