🇳🇿 New ZealandTax year 2026–27

Provisional Tax Calculator NZ 2026–27

Calculate standard, estimation or ratio-method provisional tax and instalments.

Source check 10 October 2026 · General information, not tax advice

Calculate your result

Tax year 2026–27 · New Zealand dollars · results update automatically

Method

Prior residual income tax

Estimated residual income tax

Taxable supplies for ratio period

IRD ratio percentage

Instalments

Ratio eligibility and election confirmed?

Results update automatically

exact supported

2026–27 result

Provisional Tax Calculator

Method: standard-previous
Provisional tax: $10,500.00
Instalments: 3
Amount per instalment: $3,500.00

Scope warning

Payment dates, use-of-money interest, tax pooling and IRD reassessments are outside this arithmetic result.

Assumptions

The selected method, eligibility and input amounts are user-confirmed.
The annual amount is divided equally across the selected number of instalments.

How this calculator works

Calculate standard, estimation or ratio-method provisional tax and instalments.

Formula

Standard uses prior RIT plus 5% or two-years-prior RIT plus 10%; estimation and ratio use their selected bases.

Worked example

AIM remains reserved for approved accounting software.

Scope and edge cases

Eligibility, tax codes, certificates, multiple income sources and annual reconciliation can change the final outcome. Missing components are disclosed instead of silently becoming zero.

Frequently asked questions

Is this provisional tax calculator exact?

The result card says whether the calculation is exact for its supported scope, indicative, missing inputs or unsupported. It never promotes an incomplete rule set as exact.

Does Taxliva store my salary?

No account is required and the interactive calculation runs in your browser.

Which tax year is used?

It uses the New Zealand tax year from 1 April 2026 to 31 March 2027.