Avg. Base Salary (GBP)
The average salary for a Principal Engineer is £50,692 in 2025
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What Do Principal Engineers Do?
FAQs About Principal Engineers
What is the highest pay for Principal Engineers?
Our data indicates that the highest pay for a Principal Engineer is £75k / year
What is the lowest pay for Principal Engineers?
Our data indicates that the lowest pay for a Principal Engineer is £41k / year
How can Principal Engineers increase their salary?
Increasing your pay as a Principal Engineer is possible in different ways. Change of employer: Consider a career move to a new employer that is willing to pay higher for your skills. Level of Education: Gaining advanced degrees may allow this role to increase their income potential and qualify for promotions. Managing Experience: If you are a Principal Engineer that oversees more junior Principal Engineers, this experience can increase the likelihood to earn more.