Cost of Hiring a PLC Engineer in the UK: Permanent vs Contract vs Remote (2026 Breakdown)
Joseph Brijin Chacko
Founder & Director, OSCABE
If you are budgeting for an automation project in 2026, the cost of hiring a PLC engineer in the UK is no longer a single number. There are three viable models in the market: permanent UK employment, UK day-rate contractor, and managed remote engineer. Each has very different cost dynamics, and choosing well is worth tens of thousands of pounds per year per engineer.
This guide gives you the full picture, including the hidden on-costs employers often miss.
The Three Hiring Models in 2026
| Model | Best For | Typical Length |
|---|---|---|
| Permanent UK employee | Steady-state engineering function | Indefinite |
| UK day-rate contractor | Short-burst, high-skill specialism | 3 to 12 months |
| Managed remote engineer | Project delivery or capacity scaling | 3 to 24 months |
Model 1: Permanent UK Employment
Headline Salary 2026
These are 2026 base salaries for PLC engineers across Siemens, Rockwell, and Schneider platforms.
Hidden Costs Employers Forget
| Cost | Typical % of Salary |
|---|---|
| Employer National Insurance | 13.8% |
| Pension (auto-enrolment minimum) | 3 to 8% |
| Holiday and sick cover | 6 to 8% |
| Equipment, software licences, office space | 5 to 10% |
| Recruitment fees (one-off, year one only) | 15 to 25% |
| Onboarding productivity loss (3 to 6 months) | 8 to 15% |
Realistic fully loaded cost: 145 to 175% of base salary in year one, 130 to 145% from year two.
For a £55,000 senior PLC engineer, that is £80,000 to £96,000 in year one, and £71,500 to £80,000 thereafter.
When This Model Wins
Permanent hire is the right choice when you have at least 12 months of continuous PLC work, your projects are tightly coupled to in-house intellectual property, and you need someone who understands the long-term plant context.
Model 2: UK Day-Rate Contractor
Day Rates by Platform 2026
| Platform | Mid Rate | Senior Rate | Lead Rate |
|---|---|---|---|
| Siemens TIA Portal | £325 | £400 | £475 |
| Rockwell Studio 5000 | £325 | £400 | £475 |
| Schneider EcoStruxure | £300 | £375 | £450 |
| Beckhoff TwinCAT | £375 | £450 | £550 |
| Safety PLC (any platform) | +£50 to +£75 |
What the Day Rate Includes and Excludes
The headline rate covers the contractor's time and core expertise. It typically does not include:
IR35 and Off-Payroll Working
Since 2021, large and medium UK employers are responsible for determining IR35 status. Most PLC contractor engagements where the contractor works under your direction, on your equipment, with your processes, are now Inside IR35. This adds employer NI and apprenticeship levy (around 14.3% combined) on top of the headline day rate, paid by you.
For a £400 day rate, the true cost to your business is closer to £457 per day plus VAT once Inside IR35 is factored in. Over a 220-day working year, that is £100,540 plus VAT.
When This Model Wins
UK contractors are the right choice when you need a specific specialism for under 6 months, when scope changes weekly, or when physical presence is required for the majority of the engagement.
Model 3: Managed Remote Engineer
Cost Structure
OSCABE charges a fixed monthly rate per remote engineer that includes:
Typical Monthly Rates 2026
| Level | Monthly Rate | Annual Equivalent |
|---|---|---|
| Mid PLC Engineer | £1,800 to £2,200 | £21,600 to £26,400 |
| Senior PLC Engineer | £2,200 to £2,800 | £26,400 to £33,600 |
| Lead PLC Engineer | £2,800 to £3,500 | £33,600 to £42,000 |
There are no recruitment fees, no NI, no pension, and no equipment costs to layer on top. The price is the price.
Effective Day Rate
For comparison with UK contractors: a senior remote PLC engineer at £2,500 per month works out to £125 per day on a 20-day working month, or £140 per day on an 18-day working month. That is roughly 30 to 40% of the equivalent UK contractor rate.
When This Model Wins
Remote is the right choice when 60% or more of the work can be done off-site (most modern PLC software development), when you need predictable monthly cost rather than peak day rates, or when you cannot fill the role through UK channels in your required time-frame.
Side-by-Side: Senior PLC Engineer for 12 Months
| Cost Element | UK Permanent | UK Contractor (Inside IR35) | Managed Remote |
|---|---|---|---|
| Headline cost | £55,000 salary | £400/day x 220 days = £88,000 | £2,500/month x 12 = £30,000 |
| Employer NI / off-payroll | £7,590 | £12,584 | Included |
| Pension | £2,750 | n/a | Included |
| Recruitment fee (year one) | £8,250 | n/a (or included) | Included |
| Equipment, licences, office | £5,000 | n/a | Included |
| **Total year one** | **£78,590** | **£100,584 + VAT** | **£30,000** |
For the same senior PLC engineer, the managed remote model costs roughly 30 to 40% of permanent and 30% of UK contractor.
Choosing the Right Mix
Most OSCABE clients use a blend rather than a single model:
This blend optimises for cost, quality, and resilience.
Next Step
If you would like a free cost estimate for your specific project, including a 6, 12, and 24-month projection across all three models, contact our team or post a role describing what you need. We will respond within one working day with a transparent comparison.
Ready to take the next step?
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