Bonus & Overtime Calculator
How much of a bonus or some overtime do you actually take home in New Zealand? Extra pay is taxed at your top (marginal) rate, so you keep less than the headline amount.
| Gross extra pay | |
| PAYE tax | |
| ACC levy | |
| KiwiSaver (you) | |
| Student loan | |
| Take-home extra |
IRD lump-sum method: your regular pay sets the tax rate band; the whole bonus is taxed at that rate. It is not treated as if you earn it every pay period.
See your full pay with the take-home calculator, or model a permanent increase with the pay rise calculator.
Bonuses vs overtime — how they're taxed
A one-off bonus (annual bonus, back pay, gratuity) is an IRD "extra pay". Your employer annualises your regular pay to find the right tax rate, then taxes the whole bonus at that single rate — so a one-off bonus is not treated as if you'll earn it every pay. Overtime is part of your normal wages and is taxed within the pay period, effectively at your marginal rate.
Either way, ACC levy, KiwiSaver and student loan also come out of the extra pay, which is why your take-home is less than the gross amount. Redundancy and retirement payments follow different rules and aren't covered here.