Landscape/lawn service owners — how do you handle job costing? Do you actually track what each account makes you?

Been running weekly maintenance routes for a while and I'm realizing I have no real idea which accounts are actually profitable and which ones I'm basically doing at a loss once you factor in drive time, fuel, and any extras.

Do you track job costs per account? Or do you just look at the overall revenue at the end of the month and call it good? Wondering if there's a better way to stay on top of this without it becoming a full time accounting job.