UK businesses clearly use external technology suppliers, but the available evidence does not support a neat national percentage for “how many UK companies outsource software development”. That distinction matters. It would be easy to take a nearby statistic and relabel it as a direct outsourcing rate, but doing so would create a false answer. The strongest current evidence found in this research comes from a 2024 survey of 505 UK businesses cited in a 2026 market-potential analysis for mobile application development services. In that survey, 84% of businesses reported IT and technology skill shortages, 81% said those shortages negatively affected operations, and 35% said they worked with suppliers or managed service providers to address the problem. That 35% is useful as a current external-tech-provider proxy. It is not a clean measure of software-development outsourcing, and this article keeps that boundary explicit.
What the 35% figure does and does not prove
The 35% figure shows that more than a third of the surveyed UK businesses used external suppliers or managed service providers as part of their response to IT and technology skill shortages. That is a meaningful signal of willingness to buy external technical capability.
The advantage of the figure is that it comes from a defined UK business survey rather than from anecdote. It tells us that external technology support is already normal enough to be part of the response strategy for many businesses facing skills gaps.
The limitation is equally important. The survey question is broader than software development. A supplier or MSP might provide infrastructure, cloud support, cybersecurity, service desk capability, networking or managed applications rather than custom software engineering.
For that reason, it would be inaccurate to write that 35% of UK businesses outsource software development. The correct statement is that 35% of surveyed UK businesses reported working with suppliers or managed service providers to address IT and technology skill shortages.
That may sound more cautious, but it is more useful. Buyers and software houses can see that the market is receptive to external technical help without pretending the source answered a narrower question than it actually did.
Skills shortages help explain why businesses look outside
The same survey reported that 84% of respondents experienced IT and technology skill shortages and 81% said those shortages negatively affected operations. Those figures provide context for why external providers are attractive.
Hiring experienced software developers, cloud engineers, cybersecurity specialists and data professionals can be difficult and expensive. Smaller firms may not need a full-time specialist in every area, while larger firms may need temporary capacity during major projects.
The advantage of using external providers is access. A business can bring in specialist capability without waiting to recruit a permanent team. It can also use a provider for a defined project and scale the relationship later.
The disadvantage is that external support does not remove the need for internal ownership. A supplier can build software or manage infrastructure, but the client still needs people who understand the business requirements, approve priorities and make risk decisions.
There is also a risk of dependency. If an external provider becomes the only organisation that understands a system, future changes can become expensive and slow. Good outsourcing therefore includes documentation, knowledge transfer and client access to code, systems and decisions.
Website management data shows external support is already widespread
Separate official UK evidence provides a useful adjacent picture. The UK Business Data Survey 2026 found that among businesses with a website, 24% said the website was managed entirely by an external web developer or platform, while 29% used a mixture of in-house and external support.
These figures should not be merged with the 35% supplier/MSP statistic. They measure a different activity. Website management is narrower than software development and may involve hosting, content, maintenance or platform administration rather than custom engineering.
Even so, the data shows how common mixed delivery models have become. Many businesses do not make a binary choice between doing everything internally and outsourcing everything. They combine internal ownership with external expertise.
The advantage of this hybrid model is balance. Internal staff can retain business knowledge and control, while external specialists provide capacity or skills. The disadvantage is coordination. Responsibilities can become unclear if neither side knows who owns updates, security, backups or incident response.
For software projects, the same principle applies. Hybrid delivery can work well, but only when boundaries are explicit. A project can fail even with strong developers if product ownership and decision-making are weak.
What UK buyers should evaluate before outsourcing development
If a UK business is considering an external software company, the first question should not be price. It should be whether the supplier can solve the required problem in a way the client can continue to operate and support.
Buyers should check relevant project experience, technical approach, testing, security, documentation, ownership of intellectual property and post-launch support. They should also understand who will actually do the work. Some suppliers subcontract heavily, which may be perfectly acceptable, but the arrangement should be transparent.
The advantage of a specialist external team is speed and expertise. A supplier that has solved similar problems before can avoid common mistakes and bring established delivery practices.
The drawback is reduced direct control. Priorities can compete with other client work, communication can slow, and changes may require commercial negotiation rather than a simple internal decision.
Contract structure also matters. Fixed price can give budget certainty but may create scope disputes. Time-and-materials models provide flexibility but require stronger governance. Neither model is automatically better.
The strongest outsourcing relationships therefore behave more like partnerships than transactions. The client retains strategic ownership while the supplier provides technical depth and delivery capacity.
What the evidence means for UK software houses
The available data does not justify a headline claiming that a specific percentage of all UK businesses outsource software development. What it does show is a market where technology skill shortages are widespread and a meaningful share of businesses already use external providers to fill capability gaps.
For software houses, the opportunity is to position services around those gaps. Clients may need application development, integrations, automation, cloud migration or ongoing support because they cannot hire every skill internally.
The advantage for suppliers is that external technology buying is already familiar to many businesses. The disadvantage is that clients have become more cautious about vendor lock-in, security and unclear project outcomes.
This means strong suppliers should sell more than coding. They should explain discovery, governance, testing, documentation, handover and long-term support. Those activities reduce the risks that make buyers hesitant to outsource.
The responsible conclusion is therefore measured but positive. Current UK data shows substantial technology skills pressure and significant use of external suppliers. It supports the view that UK businesses are willing to bring in outside technical capability, while stopping short of inventing a national software-development outsourcing rate that the evidence does not provide.
Primary source: CBI market-potential analysis for mobile application development services, using a 2024 survey of 505 UK businesses. Supporting context: UK Business Data Survey 2026.