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PhD Synthetic and Analytical Chemist, AI Expert (Remote, UK or US East Coast)
Posted Today by Weekday AI
Job OverviewWe are seeking highly skilled PhD-qualified chemists with strong expertise in synthetic and analytical chemi...
- Rate £100 per hour
- Category Outside
- Work type Remote
- Location United Kingdom
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AI Contract Rates in Reading: Day Rate Quartiles and Demand
Live market telemetry, compensation quartiles, and IR35 compliance benchmarks across the UK contract sector.
Median Daily Rate
£575/day
-17.9%
Interquartile Range
£465/day – £650/day
Middle 50% market distribution
Contract Engagement Split
47% Outside IR35
13% Inside IR35 engagements
Market Conditions and Compensation Trajectory
Off-payroll determination outcomes for AI assignments in Reading maintain clear operational transparency, giving independent practitioners confidence in their contracting arrangements. Compliance tracking across active local postings confirms that 47% of active roles are determined outside the scope of IR35. Supported by sound contractual governance, local rate intelligence confirms a median of £575/day, tracking -17.9% against prevailing national contracting benchmarks. Quartiles span £465/day to £650/day against a South East rate uplift. Figures summarise advertised pay on this hub to November 2026 and are market statistics, not a personal offer or guaranteed assignment rate.
Daily Rate Quartiles and Market Benchmarks
Values combine advertised day rates, stated IR35 outcomes, and sector labels from vacancies matching this hub. Quartiles use priced roles only.
| Metric | Value | What it shows |
|---|---|---|
| Median day rate | £575/day | Mid-market advertised pay for this hub |
| 25th percentile (P25) | £465/day | Lower-quartile priced vacancies |
| 75th percentile (P75) | £650/day | Upper-quartile priced vacancies |
| Outside IR35 share | 47% | Stated limited-company / outside SDS |
| Inside IR35 share | 13% | Stated PAYE / umbrella / inside SDS |
| Undetermined IR35 | 40% | Adverts that omit a published status |
| Leading sector | AI & Machine Learning (58%) | Largest hiring cluster in the sample |
| Priced sample | 24 roles | Vacancies used for the rate corridor |
| Regional rate band | a South East rate uplift | Location pricing context, not an SDS |
Statutory Standards and Frequently Asked Questions
Reading does not create a special IR35 code for AI work. The client SDS should name the Reading workplace and delivery model. An inside finding on a Reading AI brief typically deducts tax at source, while outside IR35 AI work in Reading is billed by a PSC. Local pay sits on a South East rate uplift, so a higher Reading headline rate can still be inside. Commuting into Reading does not, by itself, prove substitution or lack of control. Read the AI Reading contract for workplace, hours, and equipment clauses.
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