Outsourcing is the business practice of contracting work out to an external provider instead of performing it with a company's own staff. The work can be a single task, a complete function such as payroll, IT support, or customer service, or an entire business process, and the provider can be located in the same country or overseas. When the client and the provider are in different countries, outsourcing becomes part of international services trade, which the World Trade Organization classifies under the General Agreement on Trade in Services (GATS).

The word is younger than the practice. The term entered business usage in 1981 as a contraction of "outside resourcing," according to the reference literature on the subject. It also helps to separate two ideas that are often mixed up. Outsourcing describes who does the work: an external provider rather than your own employees. Offshoring describes where the work is done: in another country, whether by a third party or by your own foreign subsidiary. A US bank that opens its own service center in Manila is offshoring without outsourcing. The two overlap in offshore outsourcing, which is the model most people picture when they hear the word.

The main types of outsourcing

By the kind of work

  • Business process outsourcing (BPO) covers operational functions, usually split into back-office work such as finance, accounting, and human resources, and front-office work such as customer service and sales.
  • Information technology outsourcing (ITO) covers IT infrastructure, application development, and software maintenance.
  • Knowledge process outsourcing (KPO) covers higher-value judgment work: research, data analysis, legal process support, and other specialist expertise.

By where the provider sits

  • Onshore: the provider is in the same country as the client.
  • Nearshore: the provider is in a nearby country, often in a similar time zone.
  • Offshore: the provider is in a distant country, typically chosen for large wage differentials, a mechanism economists call global labor arbitrage.

Cross-border outsourcing has a formal home in trade law. GATS defines four modes of services trade, and offshore outsourcing is mostly Mode 1, cross-border supply, defined in the WTO's GATS training materials as services supplied

"from the territory of one Member into the territory of any other Member."

A contact center in Manila answering calls for a United States retailer is a textbook Mode 1 transaction: the service crosses the border while the supplier and the consumer stay where they are.

Why companies outsource

Cost is the historical reason, and it still matters, but buyer motives have broadened. Deloitte's 2024 Global Outsourcing Survey found that access to skilled talent and the need for agility now sit alongside cost reduction as primary drivers. Half of surveyed executives used outsourced services for front-office capabilities such as sales, marketing, and research, work that would once have been considered too close to the core to hand over. The same survey reported that 83 percent of executives were using AI as part of their outsourced services, though only about a quarter had yet seen tangible cost or quality gains from it, and that 80 percent planned to maintain or increase their investment in third-party outsourcing.

The underlying economics are straightforward. An external specialist can spread fixed costs across many clients, hire from deeper talent pools, and standardize processes that any single company would run at small scale. Wage differences between countries add a second layer of savings when the work moves offshore. Neither advantage is automatic, which is why the risk section below deserves as much attention as this one.

How big is the outsourcing market

Research firm Grand View Research values the global business process outsourcing market at 328.4 billion US dollars in 2025 and projects growth to 695.8 billion dollars by 2033, a compound annual growth rate of 9.9 percent. Finance and accounting was the largest single service line, at more than 21.4 percent of global revenue in 2025. Market-size estimates from commercial research firms should be read as modeled figures rather than counted ones, but the direction and rough scale are consistent across publishers.

The wider trade picture points the same way. UN Trade and Development (UNCTAD) reported that global trade reached a record 33 trillion dollars in 2024, with services growing 9 percent for the year and contributing nearly 60 percent of total trade growth. The WTO's World Trade Statistics 2025 reports that the share of services in global trade reached 27.5 percent, its highest level since 2005. Outsourced business services are one of the faster-moving parts of that services expansion.

The Philippines' role

The Philippines is one of the largest offshore outsourcing destinations in the world, alongside India. Figures from the Information Technology and Business Process Association of the Philippines (IBPAP), reported by Philstar in July 2026, put industry revenue at 40.3 billion dollars in 2025 with 1.9 million full-time employees, and project 42.3 billion dollars in revenue and 1.96 million employees for 2026.

The industry's trajectory is being reshaped by AI. In July 2026, IBPAP cut its 2028 roadmap targets, as reported by GMA News. The original 2022 goals of 59 billion dollars in revenue and 2.5 million workers were replaced with a range of 43.3 to 50.5 billion dollars and 1.85 to 2.14 million workers, depending on scenario. IBPAP president Jack Madrid cited AI, shifting buyer behavior, and competition from markets such as Egypt, Poland, Colombia, and Vietnam, and said the association needed to "review where we are and be honest about what we can achieve realistically." For a company-level view of who actually operates in the country, our BPO directory lists providers with verified registration and headcount data.

Risks and criticisms

Outsourcing has real costs, and the critical literature deserves to be taken seriously.

  • Job displacement in client countries. Estimates compiled in the reference literature put the net US job loss attributable to outsourcing at about 687,000 between 2000 and 2010, concentrated in computers and electronics, while The Economist estimated 150,000 to 300,000 US jobs lost per year to offshore outsourcing between 2004 and 2015.
  • Hidden costs. Rising offshore salaries, coordination overhead, language barriers, and time-zone friction can erode the headline savings.
  • Quality and control. Distance and cultural differences reduce a provider's understanding of end users, a problem documented most clearly in offshore software development.
  • Reversals. Deloitte's 2024 survey found that 70 percent of executives had selectively brought previously outsourced work back in-house over five years, and that 70 percent rated their vendor-management function as not fully mature.

None of this argues against outsourcing as such. It argues for treating it as a sourcing decision with measurable trade-offs rather than a default cost lever.

Where to go next

If you are early in your research, our AI Academy explains how AI is changing what outsourcing providers actually sell, and our industry news desk tracks developments such as the IBPAP roadmap revision covered above. Every figure in this article carries a source URL, a retrieval date, and a confidence score in the sources list. That is the standard we apply to everything we publish.