A senior developer in London can look like a £100,000 hire. Add employer National Insurance, pension, recruitment and overhead, and the real number is closer to £150,000. Here is the full breakdown for 2026, and how an offshore team changes the maths.
Why hiring a developer in the UK costs so much
The UK has one of the deepest engineering talent pools in Europe, and one of the most expensive. London salaries compete with finance and global tech, employer costs sit on top of headline pay, and post-Brexit hiring has narrowed the pool further. For a company budgeting a hire, the advertised salary is only the start.
The true cost, line by line
Here is what a senior developer in London actually costs a company per year, fully loaded. Figures are an illustrative model based on public UK market data, not a quote, and your number depends on seniority, location and stack.
- Base salary: £85,000 to £120,000 for a senior developer in London. Lower outside the capital, though remote hiring has narrowed the gap.
- Employer National Insurance: around 15% of salary above the threshold in 2026, roughly £12,000 to £17,000.
- Pension and benefits: auto-enrolment requires a minimum employer pension contribution, and most companies add health or other perks, around £4,000 to £8,000.
- Recruitment: agency fees run 20 to 25% of first-year salary. Amortised over a typical tenure, that is £5,000 to £8,000 a year.
- Equipment and software: laptop, licences and tools, around £2,000 to £3,000.
- Office and overhead: desk space, IT, admin and management, £8,000 to £12,000 even in a hybrid setup.
Fully loaded total: roughly £116,000 to £168,000 per senior developer, per year. The salary you advertise is often only 60 to 70% of what the hire really costs.
Two UK-specific complications: IR35 and Brexit
Two factors make UK hiring harder than the raw numbers suggest.
IR35 and off-payroll rules. If you try to control costs with contractors, the off-payroll working rules put the burden on you to assess each contractor's status. Get it wrong and you can be liable for the unpaid tax. This has pushed many companies away from flexible contracting and back toward expensive permanent hires.
Post-Brexit hiring. Recruiting engineers from the EU now requires visa sponsorship, which adds cost, time and administration. The pool UK companies could once hire from freely has shrunk, which keeps salaries high.
How an offshore team compares
This is where the maths changes. A senior engineer through an offshore partner is engaged at a fraction of a fully loaded UK hire, with none of the employer NIC, pension, recruitment or office costs on top. The idea that offshore means lower quality is usually a process problem, not a geography one, which we covered in in-house vs offshore development.
For the same seniority, a Soroc engineer is engaged at £38,000 to £68,000 a year, the full-time equivalent of our 25 to 45 euro per hour rate. Against a fully loaded UK hire of £116,000 to £168,000, that is roughly 50 to 65% less, with the engineer working inside your team and your review process.
How Soroc works for UK companies
Soroc places senior engineers based in Bolivia and across Latin America into UK and European teams, as staff augmentation or a full dedicated team. Every engagement includes a GDPR-compliant data processing agreement, an NDA and full IP assignment from day one, and the engineers keep several hours of daily overlap with UK business hours. There is no employer NIC, no pension liability, no recruitment fee and no IR35 exposure, because you contract a service, not employ an individual.
For the wider picture on where to build, see nearshore vs offshore, or the UK-specific view on our United Kingdom page.
The headline salary is never the real cost of a UK hire. Once you count everything, the gap with an offshore team is large enough to change how you build.