Procurement vs purchasing: what are the main differences?

Key takeaways

• Procurement is the end-to-end strategic process of sourcing, evaluating, and contracting suppliers, while purchasing is the narrower transactional function that raises orders, receives goods, and triggers payments.

• UK procurement can account for between 40% and 80% of a company's total costs, making it one of the most significant levers available for improving financial performance.

• Traditional UK banks often add up to 3% in FX margins and correspondent fees to every international supplier payment, while Airwallex offers market-leading FX rates from 0.5%, automated three-way matching, virtual cards with built-in spend controls, and local payment rails in 150+ countries — cutting international payment costs by up to 90% for UK businesses buying from overseas suppliers.

For UK businesses scaling beyond Britain, the true cost of buying isn't just the supplier's invoice. It includes hidden FX fees, manual reconciliation delays, and maverick spending that compounds quietly over time.

Most finance teams understand the mechanics of raising a purchase order. Fewer draw a clear line between the strategic decisions that precede it and the operational work that follows — and that gap is where cost and risk tend to accumulate.

This guide explains the difference between procurement and purchasing, maps both functions to the procure-to-pay cycle, and highlights where inefficiencies typically emerge for UK businesses.

What is procurement?

Procurement is the broader strategic discipline. It begins when a business identifies a need and continues through supplier research, evaluation, negotiation, contract award, and ongoing performance management. Its goal isn't simply to buy at the lowest price — it's to secure the best long-term outcome for the business.

In the UK, procurement controls a significant share of total costs — anywhere from 40% to 80% depending on the industry. For retail businesses, raw materials and inventory can account for around 31% of first-year budgets alone. That makes procurement strategy a direct driver of margin, not just a back-office function.

Direct vs indirect procurement

Procurement covers two broad categories:

• Direct procurement involves goods or services that go into your product or service. A Birmingham bakery sourcing flour, or a London tech firm procuring cloud infrastructure, are both direct procurement decisions.

• Indirect procurement covers everything else — office supplies, software licences, facilities management, and professional services.

Both categories carry total cost of ownership (TCO) implications that extend well beyond the unit price. A supplier offering a 10% discount can still cost more overall when you account for delivery delays, quality risk, FX exposure on international payments, and re-ordering friction.

Procurement and supplier governance

Modern procurement also covers supplier due diligence and ESG (Environmental, Social, and Governance) compliance. Since the Procurement Act 2023 came into force, contracts over £5 million must include at least three measurable KPIs. While the Act primarily applies to public sector organisations, its emphasis on transparency, strategic sourcing, and performance accountability reflects best practice across the private sector too.

What is purchasing?

Purchasing is narrower. It's the part of the acquisition cycle that converts an approved buying decision into a completed transaction. Once procurement has selected a supplier and agreed terms, purchasing handles the mechanics.

A standard UK purchasing workflow looks like this:

1. Receive or raise an approved purchase requisition (PR)

2. Create and issue the purchase order (PO) to the supplier

3. Confirm quantities, pricing, and delivery terms

4. Receive the goods or services

5. Complete the three-way match: PO, goods received note (GRN), and invoice

6. Authorise payment

This workflow is largely the same whether you're buying domestically or from an international supplier. But the payment step introduces additional complexity — and cost — when overseas transfers and foreign currencies are involved.

The "Five Rights" of purchasing

Purchasing teams are typically evaluated against five core objectives: the right quality, the right quantity, the right cost, the right time, and the right place. These "Five Rights" reflect the operational focus of the function — execution accuracy rather than strategic value creation. Procurement sets the framework; purchasing delivers within it.

The key differences between procurement and purchasing

Procurement is proactive. Purchasing is reactive. That's the simplest way to draw the line, but the operational differences run deeper for UK finance teams.

Here are five differences that affect how UK businesses operate in practice.

1. Proactive strategy vs reactive fulfilment

Procurement anticipates needs before they become urgent. Purchasing responds to internal demand once it's already been raised. Without procurement governance in place, purchasing teams often end up sourcing suppliers under time pressure — with no framework to evaluate quality, risk, or long-term suitability.

2. Total cost of ownership vs unit price

Procurement evaluates TCO across the full supplier relationship. Purchasing optimises on immediate transaction cost. For UK businesses with international suppliers, this distinction matters most at the payment stage — where FX fees and transfer costs can significantly erode the savings negotiated at the procurement stage.

3. Relational vs transactional

Procurement builds long-term supplier partnerships. Purchasing executes individual transactions. For businesses with complex or international supply chains, the relational dimension of procurement can reduce risk and improve resilience during supply disruptions.

4. Risk mitigation and spend control

Procurement teams protect the business from supply chain shocks and maverick spending — unauthorised purchases made outside of formal procurement channels. Without clear governance, individual departments can buy from unapproved suppliers, bypassing budget controls and compliance requirements.

5. UK regulatory environment

The Procurement Act 2023 has raised expectations around transparency, supplier governance, and performance measurement. Even for private sector organisations not directly bound by the Act, aligning procurement practices with its principles — strategic sourcing, measurable KPIs, and accessible contracting — is increasingly viewed as best practice.

How the procure-to-pay cycle connects both functions

The procure-to-pay (P2P) cycle maps procurement and purchasing into a single end-to-end workflow. It's the most practical way to see how both functions relate — and where handoffs between them can break down.

Phase 1 — Procurement: strategy and sourcing

Need recognition, market research, supplier evaluation, contract negotiation, and contract award. This is where strategic decisions are made about who the business buys from, on what terms, and at what agreed price.

Phase 2 — Purchasing: ordering and receiving

Purchase requisition raised, PO created and sent to the supplier, goods or services received, and three-way matching completed. This phase is operationally intensive — accuracy and speed matter here.

Phase 3 — Settlement: payment

Invoice approval, payment authorisation, and funds transfer to the supplier. For businesses with international supply chains, this is often where the P2P cycle introduces unexpected cost.

The friction in fragmented P2P systems comes from using separate platforms for procurement approvals, PO management, banking, and FX. That fragmentation creates reconciliation lag — the delay between when a commitment is made and when finance has visibility of it.

Where international payments create procurement leakage

Cross-border supplier payments introduce two cost layers that many finance teams don't account for at the procurement stage: transfer fees and FX markups.

Traditional Big Five banks in the UK often add up to 3% to the total cost of every international purchase through FX margins and correspondent bank charges. For a business paying £500,000 annually to overseas suppliers, that can represent up to £15,000 in avoidable payment costs — costs that undermine even the most carefully negotiated procurement terms.

One practical approach is currency matching. If your business collects USD from US customers, holding those funds and paying US-based suppliers directly avoids two unnecessary conversions. Paying via local payment rails — such as ACH in the US or SEPA in Europe — is also often faster and cheaper than routing transactions through SWIFT.

How Airwallex supports the full P2P cycle

Airwallex connects the strategic side of procurement with the transactional reality of purchasing by bringing approvals, POs, invoices, cards, and international payments into a single platform.

For UK businesses working with international suppliers, that can mean:

• Real-time visibility over committed spend the moment a PO is approved — not when the cash leaves the account

• AI-powered data capture and automated three-way matching to reduce manual invoice processing

• Approval routing that enforces spend policy before any money leaves the business

• Virtual cards with built-in spending controls for departments and employees

• Local payment rails in 150+ countries to reduce SWIFT costs and settlement delays

The difference compared with traditional UK banking infrastructure is measurable:

By integrating purchase orders, spend management, bill pay, corporate cards, and global accountsin one place, Airwallex helps UK finance teams close the gap between what procurement negotiates and what purchasing actually costs.

Take control of your procurement and supplier payment costs

Procurement and purchasing aren't competing ideas — they're two sides of the same commercial engine. Procurement defines how your business buys well. Purchasing ensures it buys accurately.

For UK businesses with international supplier relationships, the gap between those two functions is where cost, risk, and complexity tend to pile up. Tightening that gap — through clearer governance, better tooling, and more efficient payment infrastructure — can have a direct and measurable impact on your bottom line.

If you're looking to modernise how your team handles supplier payments, approvals, and international spend, explore Airwallex's spend management tools, Global Accounts, and Bill Pay.

Frequently asked questions

Is procurement just another word for purchasing?

No. Purchasing is a subset of the broader procurement function. Procurement covers the full lifecycle — from need identification through supplier selection, contracting, and performance management. Purchasing handles the transactional mechanics: raising orders, receiving goods, and processing payments.

What are the four types of procurement?

The four main types are direct procurement (goods and services that form part of your end product), indirect procurement (operational inputs like IT or facilities), goods procurement (physical materials), and services procurement (professional or managed services).

How does the Procurement Act 2023 affect UK SMEs?

The Act replaces EU-based procurement regulations with a simpler, more transparent framework that makes public contracts more accessible to small businesses and social enterprises. Contracts over £5 million now require at least three measurable KPIs, raising the bar for performance accountability across the supply chain.

What is maverick spending?

Maverick spending refers to purchases made outside your formal procurement channels — bypassing approved suppliers, PO processes, or budget controls. It increases financial risk, reduces negotiating leverage, and can create compliance issues. Strong procurement governance and automated approval workflows are the most effective ways to prevent it.

Sources and references

1. CIPS (Chartered Institute of Procurement & Supply) — Definition and strategic scope of procurement as a business function

2. UK Government — Procurement Act 2023: key provisions, KPI requirements, and implementation timeline

3. Tipalti — Procurement vs purchasing: process comparison and P2P workflow breakdown