Shift work and penal rates: is the extra pay worth it?

Penal rates and allowances explained

Many people assume night and weekend work must be paid at a higher rate. In New Zealand it does not have to be. Employment New Zealand is clear that penal rates are negotiated between employer and employee, either in the employment agreement or as a one-off. Some agreements, often collective ones, include a night-shift allowance, a weekend rate or an overtime rate, but none of those is guaranteed by law.

Public holidays are the exception. If you work one, you must be paid at least time and a half, and if it would otherwise have been a working day for you, you also get an alternative holiday, a paid day off later, even if only part of your shift fell on the holiday. For an eight-hour shift at $28 an hour, that is at least $336 for the day, plus the day off.

Read the agreement closely before you accept. Check the base rate, any allowances, what counts as overtime, how rosters are set and changed, and what happens if a shift is cancelled. An employer can only cancel a shift if the agreement sets reasonable notice and reasonable compensation. If it does not, or you are not told until the shift starts, or the rest of a shift is cancelled once it has begun, you are entitled to what you would have earned.

The real hourly rate after tax

A shift premium looks bigger before tax than after it. Take a day role at $28 an hour and a shift role paying a $4 an hour allowance on top, $32 an hour, both for 40 hours a week. At 2026/27 rates, after PAYE, ACC and KiwiSaver at 3.5%:

The shift role is worth about $5,387 a year more, around $103.60 a week, or $2.59 for each hour worked. That is the figure to weigh against everything else the shifts cost you. Our article on converting an hourly rate to a salary covers the conversion both ways.

Commuting at 5am: the cost nobody counts

Shifts often start or finish when buses and trains run rarely or not at all. A job that is easy to reach at 8.30am can mean a car, a taxi or a long wait at 5am or midnight. Price the commute at the real times you would travel, including parking, and remember that a second car for the household can cost more than the shift premium brings in. Our article on the true cost of commuting shows how to work it out.

Health, sleep and the long game

WorkSafe lists night work, long hours and irregular schedules among the causes of fatigue, and notes that people generally need between 7.5 and 9 hours of sleep a night. Because irregular hours are among the causes WorkSafe lists, a rotating roster can be harder to sleep around than a fixed one. Your employer must manage fatigue risks so far as is reasonably practicable, and you must take reasonable care of your own health and safety.

Shift work is common: in Stats NZ's Survey of Working Life (October to December 2018, the most recent edition we could find), about 11% of employed people worked shifts that varied, and 12% had worked at least one night shift in the previous four weeks. It is also often a compromise. In the same survey, 35% of people who worked night shifts said they would prefer to work at a different time, compared with 12% of people who mainly worked during the day. Before accepting, think about how the roster fits your household, your sleep and the rest of your life over years, not weeks.

Comparing a shift role with a day role on take-home

Put the two roles side by side on what reaches your account. The Offer Comparer works out take-home pay for two offers after tax, with no account needed. It takes a yearly figure, so multiply the base hourly rate, without any allowance, by the weekly hours and by 52 for each role. Then put a shift or night allowance, as a yearly amount, in the box for a bonus or cash allowance, where it is taxed like pay, so it is counted once. Then add the costs the numbers leave out: the commute at odd hours, childcare outside normal hours, and what your evenings and weekends are worth to you.

See every job at its take-home pay