Advice needed on logo pricing and to what extend can modifications be allowed

[Lovliebutterfly]

Hi everyone!
I have a question concerning pricing of logos. I am currently doing a logo for a new fashion brand for a client. She gave me all her specifications, made some roughs on paper, gave me some pantone colours for the background and other elements of the logo. I charged her £70 for doing this logo.

I have made the logo according to what she wanted and she was pleased. Now she decided to ask for opinions about the logo and see what other people have to say. She has paid me just 25% of the price up till now. My questions are
1. to what extend can you allow corrections to be done on the logo?
2. should I charge extra for these corrections if I have respected the initial concept of the client?
3. each time the client is making minor corrections to the logo to make things appear that the changes are minor, can this be considered as part of the initial concept?
4. how much extra can I charge for corrections or new concepts?

I would appreciate any advice on how I can deal with this client being that I am new on the market.
Thank you!

[starstar]

I have an excellent title for dealing with this sort of thing. It might be specifically geared to the US, I'm not sure. Anyhow, I use the book all the time -
Graphic Artist Guild Handbook, Pricing and Ethical Guidelines.

You could check out their website too:
www.graphicartistsguild.org
good luck

[Lovliebutterfly]

Thank you starstar, I'll try to find this book.