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Software Tester 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
£198/day
Interquartile Range
£148/day – £340/day
Contract Engagement Split
0% Outside IR35
Market Conditions and Compensation Trajectory
Operating as an independent Software Tester contractor in Cardiff offers distinct regional financial advantages, effectively balancing competitive local compensation against lower regional operational overheads. Verified local market intelligence establishes an established median day rate of £198/day, registering a 0.0% variance against the broader UK contracting standard. Local quartile analysis reveals an interquartile band from £148/day to £340/day across 1,545 local Software Tester vacancies to November 2026. Off-payroll records confirm that 0% of active Cardiff assignments maintain confirmed outside-IR35 status.
Daily Rate Quartiles and Market Benchmarks
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.
| Metric | Value | What it shows |
|---|---|---|
| Median day rate | £198/day | Mid-market advertised pay for this hub |
| 25th percentile (P25) | £148/day | Lower-quartile priced vacancies |
| 75th percentile (P75) | £340/day | Upper-quartile priced vacancies |
| Outside IR35 share | 0% | Stated limited-company / outside SDS |
| Inside IR35 share | 50% | Stated PAYE / umbrella / inside SDS |
| Undetermined IR35 | 50% | Adverts that omit a published status |
| Leading sector | IT (100%) | Largest hiring cluster in the sample |
| Priced sample | 1,545 roles | Postings with a stated day rate in the benchmark dataset |
| Regional rate band | a regional rate discount versus London | Location pricing context, not an SDS |
Statutory Standards and Frequently Asked Questions
Cardiff does not create a special IR35 code for Software Tester work. The client SDS should name the Cardiff workplace and delivery model. An inside finding on a Cardiff Software Tester brief typically deducts tax at source, while outside IR35 Software Tester 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 Software Tester Cardiff contract for workplace, hours, and equipment clauses.
