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COO Assistant Salary in California

How much does a COO Assistant make in California? As of September 01, 2026, the average salary for a COO Assistant in California is $98,966 per year, which breaks down to an hourly rate of $48.

However, a COO Assistant's salary can vary significantly. Here's a look at the typical salary range:

  • Top Earners (90th percentile): $121,915
  • Majority Range (25th-75th percentile): $88,576 to $110,978
  • Entry-Level (10th percentile): $79,117
Salary Factors Salary by Experience Related Job Salaries Top Paying Cities Explore Related Jobs

Check out COO Assistant Job Openings in California

Key Factors That Influence COO Assistant Salaries

A COO Assistant'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 and company size can directly affect your earning potential.

How Experience Level Affects COO Assistant Salaries?

Experience is a primary driver of a COO Assistant'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): $69,090
  • Early Career (1-2 years): $80,165
  • Mid-Level (2-4 years): $96,463
  • Senior-Level (5-8 years): $109,019
  • Expert (over 8 years): $130,737
Job RoleYears of ExperienceAverage Salary
Executive Assistant I less than 1 year $69,090
Executive Assistant II 1-2 years $80,165
COO Assistant 2-4 years $96,463
Executive Assistant IV 5-8 years $109,019
Executive Assistant V over 8 years $130,737

How Do COO Assistant Salaries Vary from State to State?

Your salary can change significantly depending on where you work. States with a higher cost of living and strong industrial sectors often pay more to attract COO Assistants. For example, consider the average annual salaries in these key locations:

  • District of Columbia: $99,343.
  • California: $98,966.
  • Massachusetts: $97,647.

Top Paying Cities for COO Assistant

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:

  • Los Angeles: $99,136
  • West Hollywood: $99,065
  • Dodgertown: $99,136

COO Assistant Salary by Industry: Top Paying Sectors

For COO Assistant roles, the industry you choose can affect earning potential by as much as 80% (the gap between the highest and lowest paying industries). Data shows that the Financial Services and Pharmaceuticals sectors offer the strongest compensation, at 30% above the average. In contrast, COO Assistant positions in Telecom or Hospitality & Leisure typically offer lower base pay, as these industries often view COO Assistant as a support function rather than a direct revenue driver.

The top paying industries for a COO Assistant

Industry Sector Average Annual Salary Average Hourly Rate Pay vs.Avg
Financial Services $128,656 $62.0 30%
Pharmaceuticals $128,656 $62.0 30%
Biotechnology $123,708 $59.0 25%
Insurance $118,759 $57.0 20%
Energy & Utilities $116,780 $56.0 18%

COO Assistant Salary: Hourly Rate, Weekly Pay, and Monthly Pay

Understanding how a COO Assistant'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.

  • Yearly
  • Monthly
  • Weekly
  • Hourly
  • Table View
Last Updated on September 01, 2026
$88,576
Average $98,966/year
$110,978
$7,381
Average $8,247/month
$9,248
$1,703
Average $1,903/week
$2,134
$43
Average $48/hour
$53
Annual Salary Monthly Pay Weekly Pay Hourly Wage
75th Percentile $110,978 $9,248 $2,134 $53
Average $98,966 $8,247 $1,903 $48
25th Percentile $88,576 $7,381 $1,703 $43

Find Your Next COO Assistant Job

Ready to take the next step in your career? Browse thousands of current COO Assistant job openings on our job board. Use the search bar below to find your perfect match.

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    Biotech Co

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Where Does Our Salary Data Come From?

Salary.com salary estimates, histograms, trends, and comparisons are derived from both employer job postings and third-party data sources. We also provide multiple percentiles of salary information for your reference, click here to know Why the Salary Midpoint Formula Is Crucial to Getting Pay Equity Right. With more online, real-time compensation data than any other website, Salary.com helps you determine your exact pay target.

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