Here is one commonly used formula:
Earnings =
Salary + Expenses + Profit
Billable Hours = *2080 - Overhead Hours
Earnings divided by Billable Hours =
Hourly Rate
*Total Annual Work Hours (52 weeks x 40
hours per week = 2080 hours)
To clarify, let's walk through an
example.
Salary -
Let's say you are qualified to earn a $50,000 salary.
Expenses -
For accuracy, total your projected expenses. However, expenses are often
estimated to be equal to salary, so for this example we will set our expenses at
$50,000.
Profit -
Let's use the standard 20%.
Overhead Hours - To be accurate, total your projected nonproductive hours. I
have read that 20-40% is usual. For this example, we will use 480 hours.
According to the HTML Writers Guild, this is the number used by most ad
agencies.
Now, let's put it all
together:
Earnings = $50,000 (salary) + $50,000
(expenses) = $100,000 + 20% (profit) = $120,000
Billable Hours = 2080 (full time annual
hours) - 480 (overhead hours) = 1600
hours
$120,000 divided by 1600 = $75 (your hourly rate)
The formula above is a common one that
offers a simple but effective method of computing rates. A good resource is The
HTML Writer's Guild How to Set Rates FAQ. It covers
five ways to determine your rates.
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