Shift work: what it is and how to organise it

Shift work is a way of working in which groups of employees, the shifts or crews, take over from each other according to a fixed rota, so that work continues beyond a single working day. Working shifts means alternating early shifts, late shifts and sometimes night shifts. As an employer, you organise it with a clear rotating rota, sound agreements on shift allowances and reliable time tracking.

What does shift work mean?

Shift work means that a company divides the day into fixed shifts and spreads those shifts across crews that rotate. A crew is the group of employees who work the same shift together. The shift is the time block itself, for example from 6:00 am to 2:00 pm. In shift work, an employee does not work the same hours every day, but follows a rota that changes per week or per cycle.

Shift work is common wherever work cannot stop or where downtime is expensive. Think of manufacturing, logistics, healthcare, security and transport. A factory prefers to keep machines running, a distribution centre wants tomorrow morning’s orders ready the evening before, and a care home needs people day and night.

On a fixed schedule, you usually work the same days and hours every week. In shift work, your hours change, alternating between early, late and sometimes night, and your days off do not always fall at the weekend.

What types of shift work are there?

There are several types of shift work. They differ in the number of crews and therefore in how many hours a day and how many days a week the business runs. The four most common patterns are:

• Two-shift system: two crews alternate early and late shifts, for example early one week and late the next. Work runs on weekdays from morning to evening.
• Three-shift system: three crews cover morning, afternoon and night, so work continues 24 hours a day, usually Monday to Friday.
• Four-shift system: four crews work day, evening and night shifts, often including part of the weekend.
• Five-shift or continuous system: five crews keep the business running seven days a week, day and night. A run of shifts is often followed by a longer block of days off.

What is a continuous rota?

A continuous rota is a shift pattern in which the business operates 24 hours a day, seven days a week, including weekends and public holidays. That only works with five or more crews, because every crew also needs days off and time to recover. A well-known pattern is two early shifts, two late shifts and two night shifts, followed by several days off.

Rotating rota: forward or backward?

A rotating rota moves through the shifts in a fixed order. In a forward-rotating rota, you go from early to late to night, clockwise. In a backward-rotating rota, you go the other way. Many employers choose forward rotation, because the body adjusts more easily to getting up later than to getting up earlier. Discuss the choice with your employees, as they will notice the difference in their sleep.

Which rules apply to shift work?

Shift work is subject to the general rules on working time and rest periods in your country, often with extra rules for night work. These cover, for example, how long a shift may last, how much rest is required between two shifts and how often someone may work at night. Collective agreements and employment contracts can add their own rules on rotas, night work and pay.

If you have a works council or employee representatives, involve them before you introduce shift work or change the rota. Check the current rules with the labour authority in each country where you employ people, and record the agreements you make in the employment contract or employee handbook, so everyone knows where they stand.

How do shift allowances work?

A shift allowance, also called shift premium or shift differential, is extra pay on top of the base wage that an employer gives to compensate for working changing shifts. It recognises that evening, night and weekend work is harder on health and social life. Whether you pay a shift allowance and how much depends on the law in your country, any collective agreement and the employment contract.

In practice, an allowance is usually a percentage of the hourly wage that varies per type of shift. A night shift often earns a higher allowance than a late shift, and a Sunday or public holiday more than a Saturday. If someone works longer than their scheduled hours, that is overtime, which you settle separately.

For HR, the challenge is the administration: every month you need to know how many hours each employee worked in which shift, before the allowances go to payroll.

What are the pros and cons of shift work?

Shift work has advantages for both employer and employee, but it also asks a lot of the body and of private life. An honest picture helps you set up the rota so people can keep it up for a long time.

Advantages of shift work

• The employer gets more output from the same machines and premises, because they are in use for more hours per day.
• Employees often receive a shift allowance, so their pay is higher than in a comparable day job.
• Days off also fall on weekdays, which is handy for appointments, errands or avoiding crowds.
• In a four- or five-shift system, a run of shifts is often followed by several days off in a row.

Disadvantages of shift work

• Changing hours disrupt sleep, especially after night shifts, leading to tiredness and less energy in free time.
• Employees work more evenings and weekends, which makes plans with family and friends harder.
• Irregular meals and too little recovery can affect health in the long run.
• The employer has more planning and admin: rotas, shift swaps, allowances and leave all need to line up.

How to build a shift work rota

A good shift rota starts with the question of how many people you need per time block, not with who wants to work when. These steps help you build a rota that works for the business and for employees:

• Step 1: Set the minimum staffing per shift, including roles that must always be present.
• Step 2: Choose a rota cycle that fits your operating hours, for example a two-, three- or five-shift system.
• Step 3: Plan enough recovery time between shifts and after a run of night shifts.
• Step 4: Factor in leave and sickness, so a crew is not understaffed when someone is off or ill.
• Step 5: Publish the rota well in advance and agree how employees can swap shifts.
• Step 6: Review the rota with employees after a few months and adjust where needed.

Many teams also offer flexible working where the work allows it, to make shifts easier to combine with private life.

Worked example: how many employees do you need?

An example: a production line runs continuously and needs two operators per shift. A week has 168 hours, so the line needs 2 × 168 = 336 staffed hours per week. If your operators work 36 hours a week, you need 336 / 36 = 9.3 full-time employees just to cover staffing. In a five-shift system with two operators per crew, that comes to ten employees. Add leave, sickness and training, and you see why a continuous rota in practice needs eleven or twelve people.

Where does shift work go wrong in Excel?

Shift work in Excel mainly goes wrong when rotas, hours worked and allowances live in separate files. A shift swap agreed in a group chat never makes it into the rota. A night shift that ran over is missing from the timesheet. At the end of the month, someone calculates the allowances by hand, and an error in an employee’s pay is quickly made.

The mistakes usually happen in the same places: unclear agreements on shift swaps, allowances nobody checks before payroll and leave the planner cannot see. Read more in tracking hours in Excel.

How to manage shift work in HoorayHR

HoorayHR is all-in-one HR software for SMEs, in which you manage hours worked, allowances, leave and sickness of employees on shifts in one place. For companies with 10 to 500 employees, that means no more separate lists side by side.

In our time tracking, employees record their hours per day or per week, with the timer in the mobile app, on desktop or with a QR code on location. That works well on a shop floor where not everyone has a computer. For allowances and overtime, you set up compensation types, such as evening, weekend or overtime, each with its own percentage and the choice between time off in lieu or payment. Employees submit their hours, a manager or admin approves them, and you then export the hours to payroll or send them through one of our integrations.

Leave and sickness are in the same place. Employees request leave in the app through leave management, and the company calendar shows straight away who is off, so you can fill a crew in time. If someone is ill, they report it in one click through absence management, and you see the report on the dashboard immediately.