What does a CTO cost in the UK?

A UK CTO salary varies widely because the title covers very different jobs. A CTO running a product engineering team at a venture-backed scale-up is doing different work, and commanding a different number, from a CTO steering IT, infrastructure and security at a mid-market services business. The right way to think about cost is not a single salary figure but a range driven by scope, sector, company size and the engagement model you choose. Rather than quote a number we cannot stand behind, we set out what moves the price and point you to the Starkhorn pricing page and the cost calculator for figures you can act on.

What drives the cost up or down

Seniority is the first lever. A CTO who has carried profit and loss responsibility, sat in the boardroom and led through a transaction costs more than a strong head of engineering stepping up for the first time. Scope is the second. A remit that bundles technology strategy, cyber security, data, vendor management and regulatory work is broader, and dearer, than a pure engineering leadership role. Sector matters too: regulated industries such as financial services pay a premium for leaders who understand the compliance burden. Finally, location, company size and whether you need the person to build a team from scratch all shift the number. None of these can be reduced to a tidy headline figure, which is precisely why a one-size salary quote tends to mislead.

The three engagement models, compared

There are three realistic ways to buy senior technology leadership, and they price very differently. A permanent full-time CTO is an annual salary plus employer National Insurance, pension, bonus, equity and recruitment fees, and it commits you to that cost whether or not the workload stays at full intensity. A day-rate interim is brought in for a defined stretch, often to cover a leadership gap or run a specific programme, and you pay only for the days worked. A monthly retainer, the model behind a fractional CIO and CISO arrangement, gives you a fixed, predictable fee for an agreed slice of senior attention each month.

The choice is really about how much senior time the work genuinely needs. Most mid-market organisations do not require a CTO at a desk five days a week. They need clear strategy, sound architecture decisions, security oversight and someone the board trusts, delivered consistently. For that shape of need, a fractional or interim model maps the cost to the work instead of paying full-time rates for part-time demand.

Why fractional and interim usually cost less for the work involved

A permanent hire is priced for a full week of someone’s career, with all the on-costs that come with employment. When the actual requirement is a day or two a week of genuinely senior judgement, you are paying for capacity you do not use. A fractional CIO or a virtual CISO compresses the cost to the hours that move the business, while still giving you board-grade leadership. Interim cover works the same way for a fixed window: when you have an interim CIO leadership gap to bridge, you pay a day rate for the duration and stop when the permanent appointment lands. Either way you avoid recruitment fees, notice periods and the long ramp-up of a new full-time executive. The cost calculator lets you compare a fractional retainer against a full salaried package for your own numbers.

CTO, CIO and CISO: don’t pay for the wrong title

Before you budget, be sure you are buying the right role. A CTO is usually associated with building technology and product. A CIO owns the technology strategy, systems and operations that run the business. A CISO owns security and risk. Many mid-market firms search for a CTO when what they actually need is a CIO with a security remit, or a virtual CISO alongside a fractional CIO. Getting this right changes the cost materially, because you scope and pay for the work that matters rather than an inflated title. If your need is security-led, CISO as a service is often the more accurate, and more affordable, fit. The stakes are real: the IBM Cost of a Data Breach Report 2025 puts the global average breach at USD 4.44 million, and the ICO fined British Airways £20 million in 2020 and Interserve £4.4 million in 2022, which is why security ownership belongs in any honest costing of senior technology leadership.

What you are really paying for

The salary line is the easy part to compare. The harder, more valuable part is judgement: a leader who sets a credible IT strategy, makes sound architecture and vendor calls, stands up cyber governance at board level, and keeps the organisation on the right side of regimes such as NIS2. A good technology leader also brings a tested incident response plan and a sensible position on emerging risk like AI governance. Costed properly, that capability protects far more value than it consumes. The question is not only what the salary is, but what avoidable cost the leadership removes.

Why Starkhorn

Starkhorn is led by Daniel J. Jacobs, who has spent over 20 years in technology and security, 15 of them in leadership roles, including Interim Group Technology Director at VetPartners, the BC Partners-backed veterinary group, and CIO and CISO at Jardine Motors Group. He is the author of The Strategy Bridge and holds PRINCE2, ITIL Foundation and full membership of the Institute of Interim Management.

That mix of interim group leadership and permanent CIO and CISO experience means Daniel can scope the right engagement model for the work you face, rather than steering you towards an oversized full-time hire.

Frequently asked questions