How do cleaning businesses automatically track job costing and profit margins for recurring clients?

Recurring jobs never close, so anything keyed to "job closed" misses them. What tends to work is to stop costing every visit live and use a cost per visit per client instead:

1. Labour per visit. Average time on site for that client (from clock-ins or the visits report) plus drive time, times your loaded hourly cost: wage plus payroll taxes, workers' comp and so on, not just the wage.
2. Supplies per visit. A flat figure per visit is fine. Most people overthink this one.
3. Margin per visit = what they pay per visit minus 1 + 2.

Then update the time figure monthly from the visits report. Per-client margins don't change day to day, so a monthly look is enough to spot clients whose visits have crept from, say, 2.5 hours to 3.25.

For the business-level number, the bookkeeping route mentioned above (income and supplies mapped to job-type accounts) gives you recurring vs one-off margins without any data pulls. The per-client sheet is what tells you who to reprice.