Misspelled words or poor grammar
As a writer, I find it offensive to see other writers’ profiles or proposals that are full of misspellings or grammatical errors. You’re selling your ability to write in your proposal, yet you don’t care enough to make sure it’s constructed according to the correct rules of grammar. If this isn’t your strong suit or you are a freelancer in another area besides writing, there are some great English grammar guides that will help you construct your proposal properly. My favorite as a writer is Merriam-Webster’s Guide to Punctuation and Style. This guide is easy-to-read and understand and is available at any bookstore or on Amazon.
When submitting a proposal to a prospective client it is important for you to show that you fully comprehend the scope of the project. Writing a proposal that is vague, generic and not tailored to the client’s specific needs is a surefire way to get a rejection. While it is okay to keep a “proposal template” that states your qualifications, that template should never be submitted as-is to the client. You need to ensure the client knows you understand the project and that you are able to concisely state in your proposal why you are the right contractor for the project.
Submitting a proposal for a project in which you have no experience or background is what I call a “pointless” proposal. I write; I don’t design websites or write programming code. Therefore, I’m going to submit proposals to clients who are looking for a writer. I would never write a proposal for something that I’m completely ill-suited. What happens if for some reason your complete lack of experience is overlooked by the client and you land the project? You will end up looking foolish and the client will be unhappy at the least; at worst, you’ll get a reputation as being a contractor who bites off more than you can chew and you may find the offers are coming fewer and farther between.