The average cost of proofreading services is $30 per hour. This cost can vary depending on the length of the document, the number of errors, and the complexity of the errors.
There is no definitive answer to this question as the cost of proofreading services can vary greatly depending on a number of factors, such as the length of the document, the level of complexity and the turnaround time required. However, as a general guide, you can expect to pay anywhere from $0.01 to $0.03 per word for a basic proofreading service.
The bottom line is that proofreading is not cheap, but it is worth it if you want to produce high-quality, error-free content. If you are on a tight budget, there are some free and low-cost options available, but you will likely get what you pay for. For the best results, it is worth investing in a professional proofreading service.