How can I find clients that pay $50-100/h for web/mobile development, while even with huge experience I always get $10-15/h?

The first thing you need to do is believe you can get those kinds of rates. You question is littered with reasons why you can't - but the first question you need to ask is "Is there anyone doing development living in Brazil getting paid $100+/hour for their work" - the answer is YES.

So, the better question to ask is "What are they doing different then me to get those rates?"

I know I've paid for remote developers + designers at the $100/hour range, and the thing that justified it was.
1) I had a budget and have paid that kind of rate in the past
2) They're past work, portfolio, online profile, and all interactions with them world spectacular
3) They had passion for their work, almost like craftman.
4) I felt I could trust that they could over deliver on my expectations
5) They were focused on doing one thing great (ex: Mobile Design, iOS Dev, Ruby Dev) - they didn't do it all.
6) Someone I trusted vouched for them.

You don't need all of them, maybe 2-3, but those are some of the things that come to mind.

"Still even after all those years I never managed to charge what I think I am worth. All my client projects run around from US$ 10 to 15/h. Every time that I try to charge more I lose the contract because there is always someone that offers smaller rates."

First things first, don't compete on rates. Ever. Someone can always go lower than you. It's an arms race you don't want to be a part of. Losing a client who prefers a cheaper option is not something you should lose sleep over.

Second, ask yourself: "If not rates, what I am competing with?" Ask yourself, "Why should someone hire me at $50-100 per hour instead of $10/15? What is it about what I do that makes it worth their investment?"

Avoid getting trapped in the weeds when you think about that. The correct answer to those kinds of questions is not really, "Cause I'm a good programmer." A lot of people are good programmers. A lot of them are cheap too. Whatever justifies your higher rate, it's gotta be more than just "I'm really good at code."

As well, whatever justifies a lower rate, it's gotta be more than "Cause I live in Brazil/India/whatever." People who are working with consultants in India/Brazil/etc because the rates are lower aren't the clients you want to attract. You need to attract people who want a consultant who knows what s/he's doing and doesn't care where in the world you are. But before you can get any clients like that, you need to know why it's worth paying you more... what do you bring to the table that others don't and who are you competing with?

Give that some thought... and best of luck!

I always use comparative pricing. don't get one contract at a time. Get 2 or 3. The second one gets priced higher as it requires overtime (effectively). So 15$/hr for the first project, 20$/hr for the second and 25/hr for the third. As time progresses, your rate naturally goes up if you are busy or if you are uncompromising.

Lately, I have been offered a lot to do some very specific jobs. I realised that I can't take one person's money and then offer the same for much less to others, so I have raised my overall rates and it is working really well.

If the client needs to compete for you, they will understand paying you more.

I just came across this question, and after briefly looking through the answers you have, I am not satisfied with the ideas/solutions they are proposing based on your situation.

I run a design studio, do a great deal of design and development work and hire many designers and developers as contractors around the world. I am 100% confident that I can help you position yourself to raise your rates regardless of where you live in the world.

Send me a message through Clarity and I'll schedule a quick call with you at no charge. I'm sure that in a few minutes I can provide you with a concrete, actionable strategy to reposition yourself in the market quickly.

The quote is derived from the 'efforts, time and value' matrix. Before you see what is the average quote in your country/region, see what value you are offering to your clients. If your service matches with a professional in the US, for quality, value and other such parameters, why the client would not pay you the same amount?

Now, the key is to explain the value that you bring to your client's vision, in layers. Make them understand how the quote of USD 15 per hour is different from USD 30 per hr and from USD 50 per hr. If the client wants the USD 40 per hour work for USD 15 per hour cost, he does not deserve you and you should not be working for such clients.