Adding one number and one check that usually get missed even with Job Costing set up.
The number is drive time. An hour of driving costs the same wage as an hour on site, but it almost never gets logged against the job, so route-heavy days look more profitable than they really were. If the crew clocks in when they leave the shop instead of when they arrive, that mostly fixes it without any extra admin.
The check is jobs marked complete that never got invoiced. Worth a quick pass once a month, because that money never shows up as a bad margin on any report. It just never arrives.
And agreed with the others, you're not overthinking it.
