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Interim Chief technology officer services

Interim CTO Services · an interim CTO, briefed and shortlisted

Interim CTO services put an interim chief technology officer into your business full-time for a fixed term.

The CTO owns the technology the product is built on: architecture, engineering team, delivery and technical risk.

This page sets out what the service covers, when interim is the right shape, what the market publishes on rates, and how we come back with a shortlist of 3–5, each with rate, availability and IR35 position set out.

Submit a brief → →

How a brief runswhat we undertake

  1. 01Brief30-MINUTE SCOPING CALLDay 0
  2. 02Shortlist of 3–5VETTED · RATE BENCHMARK · IR35After the brief
  3. 03InterviewsYOU MEET THE SHORTLISTYour diary
  4. 04Scoped startFIRST-MONTH OUTCOMES AGREEDYou set the date
  5. 05Fractional, interim and permanentIR35 POSITION SET OUTOn every brief

Shortlist3–5

£800–£1,800
Interim day rate · Exec Capital 2026
Full-time, fixed term
Commitment

15 minutes · video or phone

Book 15 minutes to hire an interim CTO

Tell us the scope and the days a week. We come back with Interim CTO Services candidates, their day rates and availability.

  1. 0115 minutes, video or phone
  2. 02We scope the role and the days a week
  3. 03A shortlist of 3–5 after the call
  4. 04Fractional, interim and permanent briefs
Prefer email? Use the booking page →

Pick a day that suits · live availability

01/ the role

What interim CTO services cover

An interim CTO works full-time for a fixed term to cover a gap, lead a change or see a transaction through, then hands over.

Interim executives are hired for immediate impact: they expect to take decisions from the first week.

The service covers technical strategy and architecture decisions, building and leading the engineering team, delivery cadence, quality and engineering process, and security, scalability and technical debt and technical due diligence for investors or acquirers.

If you are weighing the options, the same seat is also bought as fractional CTO services, part-time CTO services, outsourced CTO services, or permanent CTO search.

What the seat does day to day is set out in the CTO role explained; executives looking for this work can see current CTO roles; the full cost picture is on the CTO cost guide.

02/ scope

What is in scope — and what is not

In scope

Technical strategy and architecture decisions; building and leading the engineering team; delivery cadence, quality and engineering process; security, scalability and technical debt; technical due diligence for investors or acquirers.

Not in scope

Internal IT, end-user devices and business systems usually belong to a CIO or IT director.

Product discovery and roadmap ownership belong with a product leader, working closely with the CTO.

CTO or a neighbouring seat?

A CTO builds the product’s technology; a CIO runs the company’s own systems.

Early-stage businesses need the CTO first.

The scoping test: write down the three decisions you need the CTO to own in the next ninety days. If you cannot, you are not ready to brief.

03/ the route

Fractional, interim or permanent?

Four taps. The answer names the route for the seat and the page that covers it.

How much of the week does the work fill?
Is there a fixed end or a programme?
Does the seat sit on the board for years?
Is the need now, or can it wait for a search?

The route · Fractional

A fractional CTO services.

The work fills part of the week, so buy the days it needs.

A fractional CTO services holds the seat on agreed days for as long as the seat is needed, and works for other clients on the rest.

The fractional CTO services routeTalk it through

04/ rates by stage

CTO rates what the published benchmarks say

Every figure is the named source’s own published band. Fractional Quest publishes no fees: each candidate on a shortlist states their own rate. Interim day rates apply to full-time weeks for the length of the mandate.

BenchmarkPublished figureSource
Fractional CTO day rate£1,000–£1,600Leadership Services 2026
Interim CTO day rate£800–£1,800Exec Capital 2026
Permanent CTO salary (25th–75th percentile)£120,000–£201,500Robert Half 2026

05/ comparison

Four ways to buy a CTO fractional, interim, part-time or permanent

The same CTO seat can be filled four ways. The difference is commitment, contract and how long you need it.

FractionalInterimPart-timePermanent
CommitmentDays a week, ongoingFull-time, fixed termSet days each weekFull-time, open-ended
Usual contractContract for services, often via the executive’s companyDay-rate contract for the mandateOften pro-rata employment; sometimes a contractorEmployment contract
Clients at onceA small portfolioOneOneOne
Best whenYou need CTO judgement every week, not every dayYou need full-time cover or a change led nowYou want the same person on the same days for the long termThe seat is full-time work for years
ExitNotice period, or convert to permanentHand-over at the end of the mandateEmployment noticeResignation or redundancy

06/ timing

When interim CTO services are the right call

Three situations where the interim shape beats the alternatives.

Scenario 01

Gap

The CTO has left

The engineering team needs a leader now.

An interim CTO steadies delivery, keeps the roadmap moving and helps recruit the successor.

Scenario 02

Rebuild

Platform rescue

A legacy platform is failing under growth.

An interim CTO leads the re-architecture full-time with authority to make the calls.

Scenario 03

Diligence

Investor or acquirer

Technical due diligence is coming.

An interim CTO prepares the architecture, security and team story and answers the questions.

07/ vetting

How we vet the shortlist

Five stages: qualification, mandate fit, reference deep-dive, shortlist and analysis, kick-off.

  1. 01

    Qualification screen

    Verify Interim CTO Services tenure, sector context and stage fit.

    SOURCING
  2. 02

    Mandate fit

    Match to your situation — stage, board dynamics, timing.

    MATCHING
  3. 03

    Reference deep-dive

    We take references ourselves, from recent past clients — real outcomes, not titles.

    VERIFY
  4. 04

    Shortlist

    Three to five candidates with day rate, availability and IR35 position set out.

    SHORTLIST OF 3–5

08/ how it runs

How an interim CTO engagement runs from brief to hand-over

Brief.

You tell us the scope, the start date and the length of the mandate, and what success looks like in the first ninety days.

A clear brief names the decisions the CTO will own.

Shortlist.

We come back with 3–5 interim chief technology officers against the brief, each with day rate, availability and IR35 position set out, assessed through our five-stage vetting.

Mandate.

The interim CTO starts with a written mandate and a review point.

Interim executives are judged on the outcome of the mandate, and the good ones plan their hand-over from the first week.

Hand-over.

When the mandate ends the interim CTO hands over to the permanent appointment, often having helped to choose them.

09/ before you sign

Before you buy interim CTO services three checks

Standing.

Check professional standing and references before you sign: a public reference for agile delivery, technology choices and working with contractors; see the GOV.UK Service Manual.

Status.

Agree how the engagement will run in practice, because that decides its IR35 status; HMRC’s guidance for clients sets out who makes the status determination.

Scope.

Write down what is out of scope.

Internal IT, end-user devices and business systems usually belong to a CIO or IT director.

Product discovery and roadmap ownership belong with a product leader, working closely with the CTO.

10/ questions

Interim CTO services FAQ

The questions people ask before bringing in an interim CTO.

The CTO seat’s full scope: technical strategy and architecture decisions; building and leading the engineering team; delivery cadence, quality and engineering process; security, scalability and technical debt; technical due diligence for investors or acquirers. Internal IT, end-user devices and business systems usually belong to a CIO or IT director. Product discovery and roadmap ownership belong with a product leader, working closely with the CTO.
Exec Capital 2026 publishes a UK interim CTO day rate of £800–£1,800. The total depends on the days committed and the length of the mandate. Fractional Quest publishes no fees of its own; each candidate on our shortlist states their rate.
An interim CTO works full-time for a fixed term, usually to cover a gap or lead a change. A fractional CTO works a standing number of days each week, often for several clients, for as long as the business needs it.
A non-technical founding team, an agency-built product that needs taking in-house, a raise that will include technical due diligence, or engineering velocity that has stalled. Interim is the right shape when the work is full-time and time-bound.
It depends on how the engagement runs in practice — control, substitution and whether the CTO is part and parcel of your organisation. For medium and large private-sector clients, the client makes the status determination. Each candidate on our shortlist states their IR35 position.
You brief us on the scope, the days and the start date. We come back with a shortlist of 3–5 interim chief technology officers, each with day rate or salary, availability and IR35 position set out, assessed through our five-stage vetting.

Book 15 minutes · shortlist of 3–5

Bring the brief. We architect the team.

A shortlist of 3–5 with day rate, availability and IR35 position set out, after five-stage vetting.

Book a call →Submit a brief

11/ related

Keep exploring

Adjacent roles and reading.

/cto-servicesAll CTO services

Fractional, interim, part-time and permanent, side by side.

/fractional-cto-servicesFractional CTO Services

An ongoing weekly commitment.

/part-time-cto-servicesPart-Time CTO Services

Set days each week.

/what-does-a-cto-doThe CTO role explained

What the seat does day to day.

/vettingHow we vet

The five-stage process behind every shortlist.

Executive servicesCTO services hubThe CTO seat, fractionalThe CTO seat, interimIR35 guide

For hiring managers

Bring the brief. We bring the shortlist.

Sign up now →Book a call

  1. A shortlist of 3–5, each with day rate, availability and IR35 position
  2. Fractional, interim, part-time, temporary or permanent — and non-executive directors
  3. Every candidate through our five-stage vetting
  4. Your briefs and their candidates, in one room
Fractional Quest logo — how to brief interim CTO services, interim CTO services