Shift Allowance Calculator NZ

This calculator works out what shift allowances and penal rates are actually worth on top of your base pay, so you can see the real value of working nights, weekends or unsociable hours before you take a job or agree to a roster. Enter your base hourly rate, the penal rate multiplier for your shift hours, how many shift hours you work each week, and, if your employer pays a fixed allowance per shift instead, the dollar amount and number of shifts per week. From these figures the calculator returns the extra you earn per week from shift allowances, the equivalent extra per year, and your effective hourly rate while on shift, combining base pay with the penal loading. This makes it easy to compare a job with a strong penal rate against one with a higher base rate but no shift loading, or to check whether a fixed allowance stacks up against a percentage-based penal rate. Many employment agreements mix both approaches, so use whichever input matches your situation, or both together. Shift allowances and penal rates count as taxable income and are taxed through PAYE with the rest of your wages, so the amount in your bank account will be lower than the gross figures shown here. Check your own employment agreement for the exact rates, as this is an indicative estimate only.

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$
x
$
$140
extra per week from shift allowances
Per year$7,280
Effective hourly on shift$35.00

Shows the extra above your base rate. Allowances and penal rates are taxable through PAYE, so the after-tax value is lower. Check your employment agreement for the exact rates. Estimate only.

How it works

The calculator takes the extra above your base rate from the penal multiplier on your shift hours, plus any fixed per-shift allowance across your shifts, to give the weekly extra and the yearly total. It also shows your effective hourly rate while on shift, so you can see what the unsociable hours are really worth before tax.

Worked example

On a $28 base rate, 20 hours a week at a 1.25x penal rate adds 0.25 x $28 x 20, about $140 a week or roughly $7,280 a year, lifting your effective shift rate to $35 an hour.

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