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Medical Writer Contract Rates in Cardiff: Day Rate Quartiles and Demand

Live market telemetry, compensation quartiles, and IR35 compliance benchmarks across the UK contract sector.

Median Daily Rate £280/day in line with national baselines
Interquartile Range £200/day – £400/day Middle 50% market distribution
Contract Engagement Split 28% Outside IR35 33% Inside IR35 engagements

Market Conditions and Compensation Trajectory

Procurement of independent Medical Writer specialists within the wider Cardiff district remains closely linked to strategic regional development programmes, enabling local project teams to achieve critical release milestones. Remuneration benchmarks across active Cardiff engagements reflect an established median day rate of £280/day, delivering a 0.0% differential against broader national averages. Interquartile rate analytics define a localised range from £200/day to £400/day. 28% of active postings are structured outside IR35 legislation. 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

Two-axis benchmark for Medical Writer assignments in Cardiff: city rate ladder plus IR35 and sector shares to November 2026. Not a copy of the UK role page. Source: Quality Contracts market benchmark dataset (UK-wide figures; too few local postings).

Day rates come from the Quality Contracts market benchmark dataset of UK contract postings; IR35 outcomes and sector labels come from vacancies matching this hub. Quartiles use priced roles only.

MetricValueWhat it shows
Median day rate£280/dayMid-market advertised pay for this hub
25th percentile (P25)£200/dayLower-quartile priced vacancies
75th percentile (P75)£400/dayUpper-quartile priced vacancies
Outside IR35 share28%Stated limited-company / outside SDS
Inside IR35 share33%Stated PAYE / umbrella / inside SDS
Undetermined IR3539%Adverts that omit a published status
Leading sectorScience (40%)Largest hiring cluster in the sample
Priced sample130 rolesPostings with a stated day rate in the benchmark dataset
Regional rate banda regional rate discount versus LondonLocation pricing context, not an SDS

Statutory Standards and Frequently Asked Questions

Cardiff does not create a special IR35 code for Medical Writer work. The client SDS should name the Cardiff workplace and delivery model. An inside finding on a Cardiff Medical Writer brief typically deducts tax at source, while outside IR35 Medical Writer work in Cardiff is billed by a PSC. Local pay sits on a regional rate discount versus London, so a higher Cardiff headline rate can still be inside. Commuting into Cardiff does not, by itself, prove substitution or lack of control. Read the Medical Writer Cardiff contract for workplace, hours, and equipment clauses.

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