How an on-call rotation works

The roster

One row per team, one column per day of the cycle. The cycle then repeats.

Shifts per 28-day cycle

How the roster works

There are two duty types: a general day shift from 9 am to 6 pm, and an on-call standby that covers evenings, nights and weekends. Four people take turns being on call for a week. Team A reads CCCCCCC in week one, then returns to day work, while the others cover the day shift Monday to Friday and rest at weekends. Across the 28 days each person is on call for one week, so standby is covered every day. The roster makes clear who to reach out of hours, so calls do not land on whoever answers first.

• D is the general day shift, 9 am to 6 pm.
• C is the on-call standby week, covering out of hours.
• O is a weekend rest day in normal weeks.
• One person is on call every day of the month.

How hours and pay work

In the three normal weeks each person works about 40 hours, Monday to Friday on the day shift. In the on-call week they are on standby rather than at work, so scheduled day hours are light that week. Standby itself is usually paid as an allowance, and any actual call out is working time, paid as overtime at twice the ordinary wage rate with consent when it runs beyond the ordinary hours. Set clear rules on what counts as a call out, response time and rest after a heavy night, so people are not on call and then on a full day.

Who it suits

On-call rotation suits IT and DevOps, plant and facilities maintenance, medical support and any team that must respond to rare out of hours events. It avoids paying a full night crew for hours that are usually quiet. Fairness is the key: share the weeks evenly, pay standby and call outs properly, and protect rest after a disturbed night. Track who was called and for how long, so the load is visible and the on-call allowance and overtime are paid correctly each month.

Pros

• Covers rare out of hours events without a night crew.
• Standby duty is shared fairly, a week each.
• Normal day work continues in the other weeks.
• Clear ownership of who responds out of hours.

Cons

• Being reachable all week is a burden even without calls.
• A heavy night can clash with the next day work.
• Call out pay and standby rules must be clear.
• Frequent calls quickly cause burnout.

Set it up in ZeniaHR

1. In the shift catalogue add the general day shift and an on-call standby entry with codes, timings, break, full and half day hours, grace, and a colour.
2. Build a rotation template that gives each person one on-call week in turn, with day work in the other weeks, so standby is covered every day.
3. Assign in bulk over up to 92 days and open the day grid to confirm exactly one person is on call each day of the month.
4. Add the on-call allowance as a payroll input, and use the overtime policy so a call out beyond ordinary hours is paid at or above twice the rate.
5. Log each call out and its hours through attendance so the effective hours and any overtime are counted and approved by manager then HR.
6. Use notifications so the person on call and their manager are told when they start their on-call week and when a call out is logged.

Frequently asked questions