Average Principal Mechanical Engineer Salary

$128,306
Avg. Base Salary (USD)
10%
$100k
MEDIAN
$128k
90%
$162k

The average salary for a Principal Mechanical Engineer is $128,306 in 2025

Base Salary
$100k - $162k
Bonus
$1k - $20k
Profit Sharing
$1k - $20k
Total Pay
$103k - $173k
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What Do Principal Mechanical Engineers Do?

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How do Principal Mechanical Engineers Rate Their Jobs?

3.7 out of 5
(51)
Highly Satisfied
19Reviews
Based on 51 responses, the job of Principal Mechanical Engineer has received a job satisfaction rating of 3.67 out of 5. On average, Principal Mechanical Engineers are highly satisfied with their job.

FAQs About Principal Mechanical Engineers

What is the highest pay for Principal Mechanical Engineers?

Our data indicates that the highest pay for a Principal Mechanical Engineer is $162k / year

What is the lowest pay for Principal Mechanical Engineers?

Our data indicates that the lowest pay for a Principal Mechanical Engineer is $100k / year

How can Principal Mechanical Engineers increase their salary?

Increasing your pay as a Principal Mechanical 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 Mechanical Engineer that oversees more junior Principal Mechanical Engineers, this experience can increase the likelihood to earn more.