It all depends on many factors.
1. How complex is the Logo?
2. Do you have a basic design that you are looking to complete or are you starting from scratch?
3. What types of formats do you need the Logo in, web, print, newsletter, email, app. All of these can tend to be different based on size and medium and can add to the cost.
4. How many colors? Adds to the cost for print and newsletter production.
5. How many different file formats will you require?
6. How many sizes will be needed and will the Logo scale able?
7. Very Important - do you plan to have exclusive rights to the design. Believe it or not there are organizations that design and sell logo designs that DO NOT surrender rights to their designs. You use the logo and they own the rights to the logo. Sounds harmless doesn't it. WRONG. In the event that your new business takes off how would you like to have to license your own design for use in advertising. That has actually happened to some larger organizations. Don't fall for the trap make certain that when the logo is complete you have exclusive rights to the logo and you own the design. Get it in writing.
These are a few of the questions a good graphics designer will ask you when you contract for a Logo. Make sure everything is spelled out in writing prior to committing to a contract.
Remember, if it is not in the contract, it does not exist. You will hear the term "out of scope" quite a bit when dealing with these types of contracts or commitments. Whenever you hear that term that means that want to add additional costs to the original agreement. Try to keep everything in scope you do that by making certain that everything is documented up front.
Cost will be based on the quality of the organization and many of the factors listed above.
A logo is your brand, it becomes the doorway to your business. Take the design seriously and make certain that it portrays what you are looking to project as a business. It is normally your first impression to your customers.
I hope this helps. I actually have a pretty extensive checklist when I do this for my customers, on both logos and copyrighted graphics. I have built that list over many years of dealing contractors. This is a part of that list.