Methodology
New Zealand Minimum Wage Calculator methodology
Educational only: Work and pay decision support, not tax, legal, financial or career advice.
Privacy: Calculations run locally; Wage101 does not receive your work or pay inputs.
Update policy: Reviewed when formulas or official dependencies change.
Scope: New Zealand work and pay planning using your own assumptions.
1. Formulas and units
shortfall = round to cents(max(0, minimumGrossPay − actualGrossPay))Where
- actualGrossPay
- Actual gross pay (NZD/pay period)Source: User assumption
- shortfall
- Minimum-pay shortfall (NZD/pay period)Source: Calculated output
minimumGrossPay = round to cents(hourlyRate × hoursWorkedInPayPeriod)Where
- hoursWorkedInPayPeriod
- Every hour worked (hours/pay period)Source: User assumption
- minimumGrossPay
- Minimum gross pay (NZD/pay period)Source: Calculated output
- hoursWorkedInPayPeriod
- Hours included (hours/pay period)Source: Calculated output
hourlyRate = official 2026 adult, starting-out or training rate for the confirmed categoryWhere
- category
- Confirmed minimum-wage category (confirmed category)Source: Work record
- hourlyRate
- Hourly rate used (NZD/hour)Source: Calculated output
hoursWorkedInPayPeriod = entered hoursWorkedInPayPeriodWhere
- hoursWorkedInPayPeriod
- Every hour worked (hours/pay period)Source: User assumption
- hoursWorkedInPayPeriod
- Hours included (hours/pay period)Source: Calculated output
Money inputs and outputs use NZD. Pay, time, benefits and work-related costs use the units stated beside each input.
2. Worked example
Input assumptions
Check 40 hours of adult work against NZ$950 gross pay.
Calculation and outputs
Example
Check 40 hours of adult work against NZ$950 gross pay.
- Minimum-pay shortfall
- 8.00 currency units
- Minimum gross pay
- 958.00 currency units
- Hourly rate used
- 23.95 currency units
- Hours included
- 40
Minimum gross pay and any shortfall are shown from every entered hour.
Interpretation
The comparison is only as applicable as the selected statutory wage category.
3. Validation and boundary checks
- The worked example uses the same shared-work-logic engine as the interactive planner.
- Unsupported eligibility, policy branches and out-of-range assumptions fail closed.
- Result cards, trace, CSV, PDF and methodology bind to named engine result fields.
4. Assumptions and source classification
- The caller has confirmed category eligibility.
- Actual gross pay and every hour worked cover the same period.
Official dependencies used by this calculator are captured in the Wage101 evidence register and version-acknowledged in this page history. User-entered work and pay assumptions remain separate from those official inputs.
5. Limitations
- The tool does not decide starting-out or training eligibility.
- Allowances, deductions, holidays and contract enforcement are excluded.
This is educational decision support, not personalised tax, legal, financial or career advice. Check how the rules that apply in New Zealand treat your work and pay circumstances, and seek qualified advice where appropriate.
6. Update and evidence policy
Registered family-level suites test formula invariants and example reconciliation; the release ledger records that coverage without claiming a separate oracle for every line of public copy. Registered official sources block dependent public workflows when their evidence or version acknowledgement is unavailable or invalid. Work and pay inputs remain user-supplied because they vary by person, job and contract.
Change history
- : Initial public release of the New Zealand Minimum Wage planner and methodology.
Related reading
Use these practical guides to interpret the decision and its assumptions.
- New Zealand minimum wage from 1 April 2026: calculator scope
Compare entered gross pay for every entered hour with the reviewed 2026 New Zealand minimum-wage category rate.
Read guide