Mechanical Principal Engineer Salary in the United States

How much does a Mechanical Principal Engineer make in the United States?

As of April 01, 2026, the average salary for a Mechanical Principal Engineer in the United States is $148,989 per year, which breaks down to an hourly rate of $72.

However, a Mechanical Principal Engineer's salary can vary significantly. Here’s a look at the typical salary range:

  • Top Earners (90th percentile): $163,201
  • Majority Range (25th-75th percentile): $141,642 to $156,428
  • Entry-Level (10th percentile): $134,953
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View as table View as graph 25% $141,642 10% $134,953 90% $163,201 75% $156,428 $148,989 50%(Median) Didn’t find job title? Click

Mechanical Principal Engineer Salaries by Percentile

Annual
Salary
Monthly
Pay
Weekly
Pay
Hourly
Wage
75th Percentile $156,428 $13,036 $3,008 $75
Average $148,989 $12,416 $2,865 $72
25th Percentile $141,642 $11,804 $2,724 $68
Check out Mechanical Principal Engineer Job Openings in the United States
Mechanical Engineer

ACL Digital - New Albany, OH

Mechanical Engineer

Clopay Corporation - Mason, OH

Mechanical Engineer

Engtal - Canfield, OH

Mechanical Engineer

Engtal - Mason, OH

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Key Factors That Influence Mechanical Principal Engineer Salaries

A Mechanical Principal Engineer's salary isn't a fixed number. It's shaped by several important factors. Below, we'll explore how your years of experience, geographic location, education and company size can directly affect your earning potential.

How Experience Level Affects Mechanical Principal Engineer Salaries?

Experience is a primary driver of a Mechanical Principal Engineer's salary. As you build your skills and take on more complex tasks, your compensation generally increases. Here's how the average salary grows at different career stages:

  • Entry-Level (less than 1 year): $108,239
  • Early Career (1-2 years): $128,972
  • Mid-Level (2-4 years): $148,442
  • Senior-Level (5-8 years): $188,775
  • Expert (over 8 years): $101,463
Levels Salary
Mechanica... Level Mechanical Principal Engineer$108,239
Mechanica... Level Mechanical Principal Engineer$128,972
Mechanica... Level Mechanical Principal Engineer$148,442
Mechanica... Level Mechanical Principal Engineer$188,775
Mechanica... Level Mechanical Principal Engineer$101,463
$108,239 0 yr
$128,972 < 2 yrs
$148,442 2-4 yrs
$188,775 5-8 yrs
$101,463 > 8 yrs
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What Am I Worth?

Top Paying Cities for Mechanical Principal Engineers

Salaries can also vary between different cities. Major metropolitan areas or cities with a high demand for technicians often offer more competitive pay. Here are a few examples of average annual salaries in different U.S. cities:

  • San Jose: $187,920
  • San Francisco: $186,072
  • Oakland: $181,945

What Skills Can Increase a Mechanical Principal Engineer's Salary?

Demanded Skills for the Role:

  • Analysis (Mentioned in 11.3% Job Postings): Analysis is the process of considering something carefully or using statistical methods in order to understand it or explain it.
  • Design Engineering (Mentioned in 2.34% Job Postings): Creating a system, component, or process to develop new products and systems.
  • Procurement (Mentioned in 1.8% Job Postings): Procurement is the process of finding and agreeing to terms, and acquiring goods, services, or works from an external source, often via a tendering or competitive bidding process. Procurement is used to ensure the buyer receives goods, services, or works at the best possible price when aspects such as quality, quantity, time, and location are compared. Corporations and public bodies often define processes intended to promote fair and open competition for their business while minimizing risks such as exposure to fraud and collusion. Almost all purchasing decisions include factors such as delivery and handling, marginal benefit, and price fluctuations. Procurement generally involves making buying decisions under conditions of scarcity. If sound data is available, it is good practice to make use of economic analysis methods such as cost-benefit analysis or cost-utility analysis.
See More Skills
Skills Demand Percentage
Analysis 11.3%
Design Engineering 2.34%
Procurement 1.8%
What skills can make your compensation higher?
Mastering certain specialized skills can lead to a significant increase in pay. Here are examples of skills and the potential impact they can have on a Mechanical Principal Engineer's salary.
  • Machine Learning: Can increase your salary by up to 12%.
  • Flexibility: Can increase your salary by up to 7%.
  • Decision Making: Can increase your salary by up to 6%.
Skill Salary Salary % Increase
Machine Learning
$166,868
12%
Flexibility
$159,418
7%
Decision Making
$157,928
6%
Product Development
$157,928
6%
Insight
$156,438
5%
Leadership
$154,949
4%
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How Education impacts a Mechanical Principal Engineer's Salary?

Your level of education can impact your salary potential. While many Mechanical Principal Engineers enter the field with a Bachelor's Degree degree, higher education can lead to more specialized and higher-paying roles.

According to our 100% employer-reported salary data, the median salary for a Mechanical Principal Engineer with a Bachelor's Degree is between $159,334 and $167,238).

Mechanical Principal Engineer Salaries by Degree Level

Typical Education for Mechanical Principal Engineer
Degree Level % of user with this level of education
No Diploma 0.1%
High School 0.5%
Associates 0.5%
Bachelors 48.1%
Masters 37.6%
Doctorate 12.9%
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Mechanical Principal Engineer Salary: Hourly Rate, Weekly Pay, and Monthly Pay

Understanding how a Mechanical Principal Engineer's annual salary breaks down can help with budgeting. Below, you can see the average hourly rate, weekly pay, and monthly pay for this role. Use the buttons to switch between different pay periods.

Last Updated on April 01, 2026

Salary Trends for Mechanical Principal Engineer

Salaries for a Mechanical Principal Engineer can change over time, reflecting shifts in market demand and the overall economy. The median salary decreased from $140,965 in 2023 to around $129,463 in 2025, reflecting changes in demand, location, experience, and the wider economy. For a detailed analysis of Mechanical Principal Engineer salary trends, .

Average Annual Salary of Mechanical Principal Engineer Over Time

2022
$???
2023
$140,965
2024
$136,065
2025
$129,463
2026
$???
2027
$???
Year Average Annual Salary
2022
View More
2023 $140,965
2024 $136,065
2025 $129,463
2026
View More
2027
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Most common benefits for Mechanical Principal Engineer

Social Security
401(k)
Disability
Healthcare
Pension
Time Off (days)
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Common company salaries for Mechanical Principal Engineer

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Where Does Our Salary Data Come From?

Salary.com provides salary estimates, histograms, trends, and comparisons using data from employer job postings and third-party sources.

We offer detailed salary information across multiple percentiles for your reference. (Click here to learn Why the Salary Midpoint Formula Is Crucial for Achieving Pay Equity.)

With the most extensive online, real-time compensation data available, Salary.com helps you pinpoint your exact pay target.

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