I use a mix of both. Since I just started my business less than a year ago. Once I figured out my expected future overhead as in 6-12 months ahead and figured out what my potential employees labor would be plus an amount added onto that I get my labor rate. Then you go into the actual materials with a decent markup I feel like I wouldn’t mind paying for. And boom all profit is fixed with in the job but if you have some well off clients add some more especially if it’s a pretty serious job. The only work I don’t get is the cheap clients that rather have a handyman doing it.
