How to properly evaluate your work as a freelancer

Question

Electronic commerce

Hello, the question is in the title.
There is a universal method - to count the number of hours spent on development and multiply by the cost of an hour (which can be found, for example, from colleagues).
BUT if the solution is ready, how much can you ask for it. Provided that there are no analogues (because the development is very monopolized).
Of course, you can use the previous formula, but it does not take into account the "usefulness" of the product, the cost of implementation on the customer's platform and other flights / meals / accommodation.

Answer 1

The price is determined by the market - i.e. supply and demand. If there are plenty of offers, and demand is small, then the price is lowered, if vice versa, then they are increased. Of course, below a certain level, the price becomes unprofitable for certain developers. The one who has the lowest cost of the product survives.
If you are a monopolist, then feel free to raise it to the level at which you will have a stable number of customers. But this is dangerous, you can "get fat" and not withstand the competition that has appeared, which will be more modest in its requests.

Answer 2

The cost of implementation must be evaluated separately, in terms of time and money, and included in the final cost.
And how to evaluate your finished product is up to you. There are no universal formulas here for either freelancers or companies.
In addition, there are very different methods of making money on software products. For example, sometimes it is profitable to sell a solution for a nominal fee / give away for free and get the main profit from support.
I usually estimate my time investment, take a certain rate corresponding to the complexity of the work, think about how interesting the project is for me, and fight my toad. =)

Answer 3

They say that for unique machines (in the sense of machine tools), the calculation comes from weight. For example, $20 per kilogram. Is the logic clear? ;)

Answer 4

Supermarket OP:
- Please give me 200 grams of office 2010 and 2 Meters of Seven