A month is not always four service weeks. Enter the first service date and interval for a group of customers, then count the scheduled visits in the selected calendar month.
Why date-based counting matters
Nine weekly customers served on a weekday that appears five times in a month create 45 appointments. The same group creates 36 when that weekday appears four times. An average hides that difference.
ZenMaid Starter's public cap is 40 appointments monthly, which makes the distinction relevant to plan selection. The calculator highlights counts above 40, but it does not claim to reproduce ZenMaid's treatment of cancellations, deleted records or other account-specific usage rules. ZenMaid pricing
What a group means
Every customer in one row shares the same first service date and frequency. If customers begin on different weekdays or alternate weeks, add separate groups. Do not put unrelated start dates into one row and expect an exact schedule.
“First service date” is the anchor of the series. A date before the selected month is fine: the tool advances the interval until it reaches the month. A date after the month produces no visits for that group in the selected period.
Add one-off appointments separately. The result counts appointments, not cleaners, crew members or labor hours. Two cleaners assigned to the same customer visit remain one modeled appointment.
Frequency definitions
Weekly advances by seven days. Every two weeks advances by fourteen. Every four weeks advances by twenty-eight. Calendar-monthly advances to the same day number in the next month, using that month's final day when the original number does not exist.
The monthly rule is explicit: a January 31 anchor becomes February's final day and then March 31. A “last Friday” agreement is a different rule and is not modeled by that option. Use a separate manual count for unsupported schedules instead of treating an approximate output as exact.
Scope and limitations
Dates are calculated as calendar dates without time-of-day or daylight-saving changes. The tool does not account for holidays, skipped cleans, pauses, reschedules, cancellations, vendor billing rules or changes in appointment frequency. Apply those separately to your working calendar.
The result is exact for the entered anchors, intervals and counts under the stated rules. It is not evidence that those appointments exist in your software account or can be staffed.
Use the busiest foreseeable month
Check several upcoming months before choosing a capped plan. A December holiday policy may reduce actual appointments, while a five-occurrence month can increase them. Do not reduce a projected count by a cancellation that has not actually been agreed.
For software selection, combine this result with team pricing and recurring-workflow tests. A sufficient appointment allowance is one requirement; correct recurring scheduling and billing are separate requirements.