nz_fbt_calculator

shallow

nz.co.calculate/calculator · Verify this server

Work out New Zealand fringe benefit tax on a company vehicle, a low-interest loan, or another benefit. Use for: 'FBT on a company car', 'how much FBT do I pay', 'fringe benefit tax calculator', 'is the alternate rate cheaper', 'FBT on a staff loan'. THE RATE IS THE EASY PART. What goes wrong is the taxable value, because FBT is charged on a value derived from the asset, not on what the benefit cost the employer. For a vehicle the two methods give very different answers on the same car. Cost price is 5% a quarter of the GST-inclusive price the employer paid and NEVER FALLS as the car ages. Tax book value is 9% a quarter of the written-down value, with a floor of $8,333. An older vehicle is usually cheaper on tax book value; a cheap one can be dearer, because of the floor. If someone is choosing, run both. THE DAYS DIVISOR IS ALWAYS 90, under section RD 29(5)(a) of the Income Tax Act 2007. It is not the number of days in the actual quarter. Do not "correct" it to 91 or 92. On the rate, be careful: 63.93% is the single rate, applies to every employee whatever they earn, and needs no wash-up. 49.25% is lower but available in quarters one to three ONLY, and using it obliges a quarter four wash-up that can claw the saving back. NEVER present the alternate rate as simply cheaper. quarter_four_washup_required says so for you. annual_fbt is the quarter times four, which holds only if the benefit is unchanged all year. A car bought mid-year is not. Args: benefit_type: 'vehicle', 'loan' or 'other'. rate_method: 'single' (63.93%) or 'alternate' (49.25%). vehicle_value: Vehicle only. GST-inclusive cost price or tax book value. value_method: 'cost_price' or 'tax_book_value'. days_available: Vehicle only. Days available for private use, capped at 90. employee_contribution: Vehicle only. What the employee paid this quarter. loan_balance: Loan only. Average balance for the quarter. prescribed_rate_pct: Loan only. IRD prescribed rate, as a percentage. actual_rate_pct: Loan only. Rate actually charged, as a percentage. other_quarterly_value: Other benefits only. Quarterly taxable value. Returns: Quarterly taxable value, the rate applied, quarterly and annual FBT, whether a quarter four wash-up is required, and the working.

100.0/100

1 trials · measured 2 days ago

nz_fbt_calculator scores 100.0/100 on Vouch's measured behaviour index, from 1 real invocation trials against nz.co.calculate/calculator, measured 31 Aug 2026 under methodology v0.2.0. Every measured component scored 100.

Component breakdown

ComponentWeightValue
Reliability35%not applicable
Schema integrity25%100.0
Failure behaviour15%not applicable
Latency15%not applicable
Concurrency10%not applicable

Tool details

Transport
remote
Credential class
self-provisionable
Input schema
not declared
Output schema
not declared
Side-effect classification
unclassified

Score history

DayScoreTierMethodology
2026-08-31100.0shallowv0.2.0

Probe evidence

ProbeOutcomes
schema_integritypass: 1

Raw request/response logs are not archived yet — the outcome counts above are drawn directly from every recorded trial.

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Vouch score: nz_fbt_calculator
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