As of July 01, 2026, the average salary for an Office Services Assistant I in Missouri is $37,446 per year, which breaks down to an hourly rate of $18.
However, an Office Services Assistant I's salary can vary significantly. Here’s a look at the typical salary range:
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Office Services Assistant I Salaries by Percentile
| Annual Salary |
Monthly Pay |
Weekly Pay |
Hourly Wage |
|
| 75th Percentile | $41,289 | $3,441 | $794 | $20 |
| Average | $37,446 | $3,121 | $720 | $18 |
| 25th Percentile | $34,235 | $2,853 | $658 | $16 |
BJC Healthcare - Manchester, MO
Mercy - Richmond Heights, MO
Midland States Bank - Maryland Heights, MO
CVS Health - Harrisonville, MO
An Office Services Assistant I'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.
Experience is a primary driver of an Office Services Assistant I'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:
| Job Role | Years of Experience | Average Salary |
|---|---|---|
| Office Services Assistant I | 0-1 years | $37,446 |
| Office Services Assistant II | 1-3 years | $44,039 |
| Office Services Assistant III | 3-5 years | $55,950 |
| Office Services Assistant IV | 5-7 years | $62,864 |
| Office Supervisor | 7+ years | $70,239 |
What Am I Worth?
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 Office Services Assistant Is. For example, consider the average annual salaries in these key locations:
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:
Office Services Assistant I salary potential scales significantly with company size. Data shows that Enterprise companies (5,000+ employees) pay the highest average salary at around $41,883. While startup companies pay approximate $35,421.
| Company Size | Employees | Average Salary |
|---|---|---|
| Startup | 1~50 | $35,421 |
| Growth Stage | 51~500 | $37,463 |
| Established | 501~5000 | $40,446 |
| Enterprise | 5000+ | $41,883 |
For Office Services Assistant I roles, the industry you choose can affect earning potential by as much as 90% (the gap between the highest and lowest paying industries). Data shows that the Financial Services and Biotechnology sectors offer the strongest compensation, at 30% above the average. In contrast, Office Services Assistant positions in Software & Networking or Hospitality & Leisure typically offer lower base pay, as these industries often view Office Services Assistant I as a support function rather than a direct revenue driver.
| Industry Sector | Average Annual Salary | Average Hourly Rate | Pay vs.Avg |
|---|---|---|---|
| Financial Services | $48,680 | $23.0 | 30% |
| Biotechnology | $46,808 | $23.0 | 25% |
| Pharmaceuticals | $46,808 | $23.0 | 25% |
| Energy & Utilities | $44,936 | $22.0 | 20% |
| Aerospace & Defense | $43,063 | $21.0 | 15% |
Understanding how an Office Services Assistant I'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.
| Annual Salary | Monthly Pay | Weekly Pay | Hourly Wage | |
|---|---|---|---|---|
| 75th Percentile | $41,289 | $3,441 | $794 | $20 |
| Average | $37,446 | $3,121 | $720 | $18 |
| 25th Percentile | $34,235 | $2,853 | $658 | $16 |
Promotions are the fastest way to increase your earnings. As an Office Services Assistant I, you have the following paths for advancement. The table below compares the salary raises for common next-step roles. By comparing these figures, you can choose the career path that best meets your financial goals.
| Next Step Role | Estimate Salary | Projected Raise |
|---|---|---|
| Office Services Assistant II | $44,039 | 18% |
| Business Office Manager | $86,804 | 132% |
Ready to take the next step in your career? Browse thousands of current Office Services Assistant I job openings on our job board. Use the search bar below to find your perfect match.
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