Your wages are not “profit”.
Your wages should be labor+labor burden+a percentage that you would add on if you were paying an employee.
“Profit” is something on top of that, that is what the “company” makes. Profit costs can be surviving slowdowns in work, business growth, warranty work, callback, unexpected costs like vehicle breakdowns, etc.
And I guarantee you, you have dozens of overhead costs.
I have had this conversation with probably hundreds of fellow contractors. I’m only saying that to point out that I am familiar with small one man shows believing they have basically no overhead, but when I dig into it with them, there is actually quite a bit.
If you have a van or service body, that is not cheap. That is overhead, and without it, you would not be in business. You could take the bus to McDonald’s and work, but you can’t as a service electrician
Tools, tool repairs, tool replacement, license, bond, insurance, computer, cell phone, office supplies, vehicle maintenance, stock on hand, fuel (which is far more than if you driving to one place and working there all day), advertising, logos, clothing (which is specialized for a contractor), Code books, continuing education, etc.