In-house team vs agency: which should you hire for digital work?
Hire in-house when the work is continuous, core to your product, and you can keep someone fully occupied for years. Use an agency when the work is a defined project, needs several specialisms at once, or when hiring the right person would take longer than the project itself.
What this decision actually turns on
This is usually presented as a cost comparison, which is the least useful framing. Agencies bill more per hour and cost less per outcome on bounded work; employees cost less per hour and more per outcome on work that does not fill their week. The rate is not the variable that matters.
The variable that matters is continuity of demand. A senior developer is worth hiring when there are two years of work for them. If there are four months of work, an employee is an expensive way to buy four months and a difficult conversation, and the recruitment cycle alone will eat a quarter of it.
In-house vs Agency, dimension by dimension
The highlighted cell in each row is the stronger option for that dimension alone — which is not the same as the better overall choice for you.
| Dimension | In-house | Agency |
|---|---|---|
| Cost on bounded work | High. Salary plus overheads continue whether or not there is work. | Lower. You pay for the project and it ends. |
| Cost on continuous work | Lower over time. No margin, and accumulated context makes each task cheaper. | Higher. Every engagement carries margin and some re-contextualising. |
| Time to start | Two to four months to hire a good senior person, realistically. | Days to weeks. |
| Breadth of skills | Narrow per hire. Design, frontend, backend and SEO are four different people. | Broad by construction — that mix is what an agency is. |
| Domain knowledge | Deep and compounding. Knows your business, your users, your history. | Shallower and rebuilt each engagement, though retainers narrow the gap. |
| Availability | Dedicated, minus leave, meetings and everything else the org needs from them. | Shared across clients, but contractually committed to a scope. |
| Risk if it does not work out | High. Hiring mistakes are slow, expensive and personal to unwind. | Low. The contract ends. |
| Long-term ownership | Complete. Knowledge stays inside the company. | Depends on handover discipline and documentation quality. |
Hire in-house when
- The work is continuous and you can genuinely fill years, not months
- It is core product engineering rather than a project around the product
- Deep, accumulated domain knowledge is what makes the work good
- You already have engineering leadership able to hire and manage well
- Keeping the capability inside the company is a strategic requirement
Use an agency when
- The work has a defined start and end — a build, a migration, a launch
- It needs design, engineering and growth simultaneously rather than sequentially
- You need to start now and hiring would take a quarter
- The specialism is needed occasionally, not continuously
- You want a fixed, contracted cost rather than an ongoing commitment
Related reading
Questions people ask about this choice
Is an agency more expensive than hiring?
Per hour, yes. Per outcome on bounded work, usually not — an employee costs the same whether or not there is work that week, and recruitment plus ramp-up is often a quarter before anything ships.
Can an agency work alongside our in-house team?
Yes, and it is the most common arrangement we work in. The agency takes a surface the internal team lacks bandwidth for, ships inside their repo and conventions, and documents it for handback rather than owning it permanently.
Still not sure which fits?
Describe your situation and we will tell you which option we would pick and why — including when the answer is the one we do not sell. That is a faster conversation than another comparison article.