Tail spend management providers at a glance: A comparison of S2P suites, marketplaces, and single-creditor services. Includes selection criteria, cost-benefit analysis, and a five-step implementation guide.
Those searching for a tail spend management provider primarily find tools for the predictable part of procurement: suites, catalogs, and platforms. However, the real pain point is rarely standard demand. It lies in the many small, irregular orders that require a new supplier to be set up, vetted, and paid every single time. This article categorizes the provider landscape, outlines selection criteria, and shows how the single-creditor approach fills the gap that catalogs leave behind.
Tail spend refers to the long tail of indirect procurement: many orders with low individual value, spread across a vast number of suppliers. It is typically characterized by three features: low volume per order, lack of repetition, and procurement effort that is disproportionate to the order value. We covered the fundamentals and the most important levers for reducing this effort in our article Tail Spend Management.
The true scale of the potential impact only becomes clear when you look at your own numbers: compare the number of order transactions with the order volume. As a rule, a large share of the transactions accounts for only a small share of the volume. Procurement teams therefore spend most of their operational time on the area that moves the least volume. This is precisely why a dedicated approach for this area is worthwhile.
Classic solutions like catalogs, framework agreements, and bundling work well where requirements are recurring and standardizable. This does not apply to a significant portion of tail spend: spare parts from niche suppliers, one-off services, software licenses outside of framework agreements, or trade fair supplies. These one-off requirements do not fit into any catalog, and every single order currently triggers the full process: supplier setup, compliance checks, payment, and master data maintenance.
The single-creditor approach addresses this exact gap. Instead of setting up a new supplier for every one-off requirement, a single creditor is set up once in the ERP system. From then on, every one-off requirement is processed as a standard order to this single creditor: they place the order with the respective supplier, handle the payment, and provide a consistent, auditable invoice at the end. The delivery arrives directly from the supplier to the requester.
Important for context: A single-creditor provider like Pedlar is a managed service, not software or a marketplace. There is nothing to implement, no catalog to maintain, and no users to train. The ordering process remains the same; only the counterparty is always the same.
From the perspective of the departments, little changes, and that is the whole point: report the need, order, and receive. Order processing, payment, and invoice verification are handled by the service provider, while approvals and budget responsibility remain within the company.
Tail spend management providers can be roughly divided into three categories. They compete less with each other than it might seem at first glance, as they solve different problems.
1. Source-to-Pay suites. Comprehensive process platforms for strategic procurement: tenders, contract management, approval workflows, and reporting. Strong in managing large commodity groups. In practice, tail spend is often left out because the effort required for proper integration rarely pays off for minor requirements.
2. Catalogs and marketplaces. Digital product ranges with negotiated terms, where departments can order independently. Ideal for recurring standard requirements such as office supplies or standardized consumables. The limitation lies in the assortment: what is not listed is excluded. How catalogs and the single-creditor model relate to each other is shown in the comparison Single-creditor model or catalog.
3. Single-creditor service providers. Managed services with an open supplier base: any item, any service, any provider, consolidated via a single creditor. They do not replace suites or catalogs, but rather handle the part that neither covers. For many companies, this is the missing third layer alongside suites and catalogs.
A simple rule of thumb helps with classification: the suite manages strategic procurement, the catalog handles recurring standard requirements, and the single-creditor service provider covers the unpredictable remainder. If you already have a suite or a catalog in place, you are not replacing anything. This third category complements the first two where they structurally fall short.
Providers differ significantly within each category. Six criteria have proven effective for selection, which can be formulated as concrete questions for evaluation.
The economic leverage in tail spend is almost never in the purchase price, but in the process. Up to €500 in process costs can be saved per one-off order by eliminating supplier onboarding, audits, and manual coordination. In addition, there are two silent benefits: vendor master data remains clean because no more "dead" records are created, and maverick buying decreases because the official route suddenly becomes the fastest. Neither effect appears in a single KPI, but both are clearly noticeable in day-to-day operations: fewer new entries, fewer queries between purchasing, accounting, and departments, and fewer exceptions to the standard process.
The calculation is simple: count the one-off orders in a year and compare your internal process costs per order with the service provider's price. Even with moderate volumes, it becomes clear that process costs replace the purchase price as the largest cost block.
See how this looks in practice in the Witzenmann Case Study: 85% lower process costs per order, a calculated annual saving of €35,700, and a return on investment of 3.3. Over 100 companies now handle their one-off requirements via Pedlar.
Getting started requires neither a project nor a system decision. In practice, five steps have proven successful.
Tail spend is the sum of a company's small, irregular expenditures. One-off requirements are its biggest driver: needs that occur exactly once but still trigger the full procurement process. Solving for one-off requirements means solving the most time-consuming part of tail spend.
Yes, because the approaches complement each other. Suites and catalogs handle the predictable portion, while a single-creditor service provider takes care of off-catalog requirements. Together, they cover almost the entire indirect procurement spectrum without needing to replace any existing systems.
Implementation consists of a one-time vendor setup in the ERP system. There is no software implementation and no training required; the first order can be placed immediately afterward. At Pedlar, every request is processed within 24 hours, with a dedicated contact person.
Companies that regularly procure items outside of their catalogs and framework agreements: manufacturing SMEs with spare parts and maintenance needs, as well as corporate divisions whose e-procurement systems do not cover the unpredictable remainder. A good indicator is the number of vendors with only one order per year.
A marketplace is an assortment: it bundles listed vendors under one interface, and what isn't listed stays out. A single-creditor provider works without assortment limits. They procure the specific requirement from the appropriate supplier and consolidate the order, payment, and invoice through a single creditor; the delivery comes directly from the respective supplier.
That depends on the provider's cost structure. Suites and platforms usually work with license and operating costs, while single-creditor service providers like Pedlar charge a price per order based on order value, with no fixed costs and no minimum volume. This is offset by the process costs saved on each one-off order.
Would you like to know how much tail spend is hidden in your vendor master data and what the 1-creditor model means for your procurement? Schedule a non-binding initial consultation.
