Fractional CTO · Cost & Day Rates UK 2026
Fractional CTO Cost & Day Rates (2026)
What a fractional CTO costs in the UK in 2026 — day rates £1,000–£1,600 and monthly retainers £3,000–£7,000 (Red Eagle Tech), hourly advisory £150–£350 (Red Eagle Tech).
Full cost vs a permanent CTO, by stage and city.
Sourced rates, updated September 2026.
How a brief runswhat we undertake
- 01Brief30-MINUTE SCOPING CALLDay 0
- 02Shortlist of 3–5VETTED · RATE BENCHMARK · IR35After the brief
- 03InterviewsYOU MEET THE SHORTLISTYour diary
- 04Scoped startFIRST-MONTH OUTCOMES AGREEDYou set the date
- 05Fractional, interim and permanentIR35 POSITION SET OUTOn every brief
Shortlist3–5
On the board · last 3 months
Fractional CTO jobs on the board
- InterimSyndicatedInterim Head of Engineering
Storytoys · Rotherham
est £1,300/dayRotherham - PortfolioSyndicatedPortfolio Chief Technology Officer
The Carlyle Group · London
est £1,300/dayLondon - FractionalSyndicatedProduction Lead and Fractional CTO
Reg Advantage Ltd · London
est £1,300/dayLondon - FractionalSyndicatedFractional CTO Wanted | Green Orbit | Initially Equity Only | UK-Based
Green Orbit Ltd · Cardiff
est £1,300/dayCardiff - FractionalSyndicatedFractional CTO
Maxima Opus Ltd | Cloud, Cyber & CTO Consulting · Bury St Edmunds
est £1,300/dayBury St Edmunds
Current fractional CTO opportunities
Fractional recruitment works differently from a permanent search — shorter, scoped by days a week, and priced on the engagement. Send a CTO Cost brief and we come back with a shortlist of three to five vetted candidates.
01/ the cross
Where a permanent hire becomes cheaper.
Move the day rate and the days a week: the rising line is a month of part-week cost, the flat line a permanent hire’s month. Where they cross, the seat should go full-time.
At 3.5 days a week a permanent hire costs less.
Our arithmetic. Permanent a month = the salary ÷ 12 plus 15% employer NI, plus the 30% search fee spread over 12 months — the calculator’s inputs. Hover, tap or use the arrow keys for each step.
Permanent = the £160,500 Robert Half 2026 median salary. The full calculator below adds the months, the totals and the currency tabs.
- The fractional CTO at 2 days a week never passes permanent inside 24 months.
- Interim passes permanent at month 4.
Our arithmetic, cumulative. Permanent = the salary’s 30% search fee in month 0, then salary ÷ 12 plus 15% employer NI each month. Interim = the midpoint of the published interim band (£1,300 a day, Exec Capital 2026) × 5 days × 4.33 weeks. Hover, tap or use the arrow keys for each month.
02/ the route
Fractional, interim or permanent?
Four taps. The answer names the route for the seat and the page that covers it.
The route · Fractional
A fractional CTO cost.The work fills part of the week, so buy the days it needs.
A fractional CTO cost holds the seat on agreed days for as long as the seat is needed, and works for other clients on the rest.
The route · Interim
An interim CTO cost.The work fills the week, and it has an end: a programme, a cover, a transaction.
An interim CTO cost takes the seat full time for that stretch and hands it over when it is done.
The route · Interim, then permanent
Interim now, a permanent CTO cost after.The seat is full time and long term, and the need is now.
An interim CTO cost holds it while the permanent search runs, so the seat is not left empty.
The route · Permanent
A permanent CTO cost.A full-time seat that sits at the table for years is a permanent hire.
There is time to run a search, so run one.
03/ the role
What a fractional CTO costs in the UK in 2026
UK fractional CTO cost runs £1,000–£1,600 a day, or £3,000–£7,000 a month on a one-to-two-day-a-week retainer (the same bands in Red Eagle Tech's guide).
Hourly advisory rates run £150–£350 (Red Eagle Tech).
Connectd puts the day band at £900–£1,600, mid-market £1,000–£1,200.
These are published asking prices, not transacted rates.
Year-1 total cost of ownership, per Red Eagle Tech's published model: fractional CTO £74,400–£75,600 vs full-time CTO £192,500–£255,000 (salary £140,000–£180,000 + employer NI £19,500–£25,000 + pension/benefits £8,000–£12,000 + equipment £5,000–£8,000 + recruitment £20,000–£30,000).
Red Eagle Tech puts equity at an optional 0.2–0.5% for a fractional CTO vs typically 1–3% full-time.
HMRC publishes the employer National Insurance rates for each tax year.
GOV.UK sets out the minimum workplace pension contributions under automatic enrolment.
💡 Client vs practitioner view: This page covers what it costs to hire a fractional CTO.
For the practitioner earnings view — what a fractional CTO takes home — see Fractional CTO Salary UK.
For the role itself — what a fractional CTO does, who hires them, where the roles are — see Fractional CTO Jobs UK.
Last updated: September 2026 — rates from Red Eagle Tech and Connectd; salary comparisons should distinguish permanent base pay from contract rates.
04/ scope
Section 01 — Pricing models
Retainer (the most common UK model)
£3,000–£7,000 / month at one to two days a week (Red Eagle Tech).
Ongoing embedded leadership — strategy, tech hiring, architecture oversight, team management, board reporting.
Red Eagle Tech puts a Series A engagement at three to four days a week at £6,000–£10,000 a month.
For the board-reporting part, the NCSC's Cyber Security Toolkit for Boards sets out what directors should expect to hear about cyber risk.
Day rate
£1,000–£1,600 / day (Red Eagle Tech).
Project-shaped scope — technology assessments, technical due diligence, architecture reviews.
A security review often starts from Cyber Essentials, the minimum standard the Government recommends.
Red Eagle Tech puts London-based specialists at £1,200–£1,600 vs £800–£1,100 in Manchester, Leeds and other regional hubs.
Use day rate when scope is project-shaped, retainer when ongoing.
Hourly advisory
£150–£350 / hour (Red Eagle Tech).
Light-touch advisory work — scheduled monthly meetings, on-call advice, light input for very early-stage founders who want CTO sanity-checks without embedded leadership.
Project / fixed-fee
Scope-dependent.
Technology audits, hiring processes, architecture design, team reorganisation — quoted per project rather than time-based.
No UK source publishes a fixed-fee band, so ask for the day-rate build-up behind any quote.
Retainer is the dominant UK model for ongoing leadership. Day rate is project-shaped. Most work is remote, which Red Eagle Tech says narrows the London premium.
05/ rates
Fractional CTO rate comparison
Published day-rate bands for a CTO, each with its source. The full-time band is a salary divided by 220 working days — our arithmetic.
Published UK day-rate bands · £ a day · the marker is the calculator’s day rate
- Fractional£1,000–£1,600Leadership Services 2026£1,300
- Interim£800–£1,800Exec Capital 2026
- Permanent, per day£545–£916Robert Half 2026 salary ÷ 220 days
The permanent band is the published salary ÷ 220 working days — our arithmetic, for comparison only.
06/ the maths
What the seat costs, by the days a week
Move the day rate, the days a week and the months: the totals and the permanent comparison for the period. The curve above shows where a permanent hire becomes the cheaper seat.
The slider runs across the published band for a fractional CTO: £1,000–£1,600 a day (Leadership Services 2026).
Cost over 12 months
£135,200
104 working days · 2 d/wk · 12 mo · before tax
Fractional costs less over 12 months£97,525
Fractional CTO, 12 months£135,200
Fractional CTO, a month at 2 d/wk£11,258
Permanent CTO, same period£232,725
Fractional CTO, 12 months$179,126
Fractional CTO, a month at 2 d/wk$14,916
Permanent CTO, same period$308,337
Converted from £ at $1.3249 per £1 (Bank of England spot rate), 2 Oct 2026. A conversion, not a US market rate. Source ↗
Fractional CTO, 12 months€158,806
Fractional CTO, a month at 2 d/wk€13,224
Permanent CTO, same period€273,359
Converted from £ at €1.1746 per £1 (Bank of England spot rate), 2 Oct 2026. A conversion, not a EU market rate. Source ↗
Our arithmetic, indicative. Permanent = the £160,500 Robert Half 2026 median salary pro rata for the same months, plus 15% employer NI, plus a 30% search fee on the annual base (UK retained search runs 25–35%, Headhunters.co.uk). Excludes pension, bonus and equity.
07/ the week
How a week divides.
The days you buy are yours; the rest of the week goes to other clients. Move the days a week in the calculator above and the week redraws.
Illustration only: one way a fractional CTO’s week can divide at 2 days a week for you. Each block is half a day.
08/ the board
What the board holds.
A read of the roles on the board on this page, counted as they stand: how each is engaged, whether the posting gives the days and the rate, and where the work happens.
On this board, last 90 days · 5 roles · Fractional CTO
Engagement
- Fractional3
- Interim1
- Portfolio1
Days a week
- Stated in the posting0
- Not stated5
Day rate
- Verified rate0
- Estimated (est)5
- Rate not stated0
Work arrangement (as the job feed classifies it)
- Remote2
- Hybrid3
- On-site0
Newest posting on the board: 28 Oct 2026.
Postings per week on this board, last 90 days
5 postings on this board in the last 90 days, counted by the week each was published.
09/ rates by stage
Cost by company stage
Four stage tiers, as published by Red Eagle Tech. Match seniority of engagement to where the business is. The right CTO scope is a function of headcount and what the business is trying to prove, not job title.
10/ the week
What 1–2 days a week actually looks like
Set to 1.5 days a week — the middle of the one-to-two-day-a-week retainer priced at £3,000–£7,000 a month. Drag to see the verdict shift.
1.5 days/week — midpoint of the 1–2 d/wk retainer
11/ regions
London vs regional / remote
Red Eagle Tech puts London day rates at £1,200–£1,600 vs £800–£1,100 in Manchester, Leeds and other regional hubs. Each bar is the midpoint of Red Eagle Tech's published band. Red Eagle Tech notes most fractional work is remote, which narrows the premium.
12/ economics
Section 06 — Permanent CTO salary benchmark (UK)
A permanent CTO package and a fractional quote measure different commitments.
Compare engineering scope, team responsibility, reporting line and decision authority before comparing prices.
A CTO who owns delivery and hiring across a growing engineering team has a different brief from an adviser reviewing architecture.
Robert Half’s CTO salary guide describes permanent starting-salary projections; read its geography and experience assumptions alongside the figure.
Check whether a published salary figure is base pay or total pay, and whether bonus, equity and benefits are included.
For a permanent appointment, budget employer National Insurance and pension contributions separately using the GOV.UK sources above.
For a fractional brief, ask each candidate for the quoted day rate, working days and included responsibilities.
Multiplying those agreed inputs gives a useful engagement budget without treating a salary survey as an executive contractor rate.
Title inflation widens the range: a small-firm 'CTO' is not always a board-level executive.
ITJobsWatch shows UK Chief Technology Officer contract median £600/day (6 months to 12 Feb 2026).
A day rate carries no NI, no pension, no equity dilution and no recruitment fee, and is paid only when used — so it does not compare directly with a salary.
13/ comparison
Fractional vs full-time CTO total cost of ownership
Year-1 loaded cost, per Red Eagle Tech: fractional £74,400–£75,600 vs full-time £192,500–£255,000 (salary £140,000–£180,000 plus employer NI, pension/benefits, equipment and £20,000–£30,000 recruitment). Red Eagle Tech puts equity at 0.2–0.5% fractional vs 1–3% full-time, and interim CTOs at £10,000–£15,000 a month for short cover. Employer NI is 15% from April 2025 (HMRC).
14/ comparison
CTO vs CIO (brief adjacency)
CTO owns product / engineering / build. CIO owns internal IT / systems / security ops. The CIO figure is Exec Capital's interim band — we hold no sourced UK fractional CIO day rate.
15/ timing
What drives a fractional CTO day rate
Six honest cost drivers — match the brief to the rate. No "industry says". Each card is a verifiable lever.
Scenario 01
Stage
Stage maps to scope, scope maps to days/week, days/week maps to rate.
Pre-seed advisory ≠ Series A operator.
Scenario 02
Sector
Operators with fintech, AI or regulated-sector experience sit at the top of the band and above.
Scenario 03
Mandate
Buyers in 2026 pay for operating rhythm — code review, hiring, on-call decisions — not advice-only.
Scenario 04
Days / week
Light-touch scope is advisory-shaped.
At the heavy end the engagement starts to look like interim economics.
Scenario 05
Geography
Red Eagle Tech puts London-based specialists at £1,200–£1,600/day vs £800–£1,100 regional.
Remote-first engagements blend.
Scenario 06
Urgency
"Need someone yesterday" mandates carry a premium and shorter notice; planned strategic hires don't.
16/ vetting
How we scope cost before we recommend
Same 5-stage method — brief, fit-check, shortlist, references, structured trial — applied to cost questions: what's the scope, what's the right model (advisory / retainer / day-rate / interim), what's the realistic budget for the stage.
- 01
Qualification screen
Verify CTO Cost tenure, sector context and stage fit.
SOURCING - 02
Mandate fit
Match to your situation — stage, board dynamics, timing.
MATCHING - 03
Reference deep-dive
We take references ourselves, from recent past clients — real outcomes, not titles.
VERIFY - 04
Shortlist
Three to five candidates with day rate, availability and IR35 position set out.
SHORTLIST OF 3–5
17/ The working remit
What belongs in a fractional CTO cost comparison?
Compare the same scope, working days and period.
Separate the executive’s stated rate from engineering delivery, specialist security work and other support the business still needs.
A day-rate comparison is incomplete if one option includes a team and another includes only the named leader.
Use the published bands and calculator on this page as their labelled source permits.
Check the fractional CTO services scope before comparing an ongoing service with an appointment, and use hire a fractional CTO to agree actual availability and terms.
18/ virtual cto
Virtual CTO pricing — the same seat, bought differently
Virtual CTO pricing follows the same shapes as fractional: an hourly rate for light advisory input, a day rate for project-shaped work, and a monthly retainer for ongoing leadership.
"Virtual" usually signals remote delivery and "fractional" a part-time commitment; the two titles often describe the same purchase, and the same published bands apply — £1,000–£1,600 a day and £3,000–£7,000 a month at one to two days a week.
What moves the price is who you are buying.
Some virtual CTO services are one named person; others are an agency or software house selling "CTO as a service", where a senior person sets direction and a team delivers.
That can look cheaper per month while bundling delivery work you could buy elsewhere, or dearer because it includes it.
Ask for the named individual, the days they personally commit, and the day-rate build-up behind any package.
Check who you are contracting with — the individual's own company or an agency.
The Companies House register shows a company's current and resigned officers and its filing history for free.
For the hourly figure in detail, see fractional CTO hourly rate; for what the seat covers, Fractional CTO services.
19/ the retainer
Fractional CTO retainer: what the monthly fee buys
A fractional CTO retainer is a fixed monthly fee for an agreed number of days — £3,000–£7,000 a month at one to two days a week on the published band.
Most published fractional CTO rates are quoted this way because the work is continuous: the roadmap, architecture decisions, engineering hiring, vendor oversight and board reporting do not stop between visits.
Four terms decide whether a retainer is good value.
Days and access — how many days, whether unused days roll over, and what contact you get between them.
Scope — leadership only, or hands-on delivery too; a CTO writing tickets is an expensive developer.
Ownership — software and documentation a contractor creates belong to them unless the contract assigns them (Intellectual Property Office), so the agreement should assign code, architecture documents and specifications to the company.
Exit — the notice period, and a handover of credentials, documentation and supplier relationships.
Re-scope the retainer as the stage changes: the stage table above runs from one day a week at seed to three or four at Series A, and past that the arithmetic starts to favour interim cover or a permanent hire.
To model the switch, use the rate calculator; to hire, go to Fractional CTO Jobs UK.
20/ questions
Fractional CTO Cost FAQ
The questions people ask before bringing in a fractional CTO.
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.
