Worked example
Single parent on $37,800
Two children aged 4 and under 1, 25 paid-work hours a week, salary or wages and no main benefit.
$583/week
- Family Tax Credit
- $276
- In-Work Tax Credit
- $147
- Minimum Family Tax Credit
- $83
- Best Start
- $77
New Zealand · 2026-27 estimate
Start with a quick estimate using four simple answers. If you may qualify for Minimum Family Tax Credit, open the optional detailed check for income splits and work hours.
Calculation year: 1 April 2026 to 31 March 2027
Current 2026/27 rate notice: IRD says the increased In-Work Tax Credit is temporary and may return to its earlier rate if the published petrol-price condition is met. Rates were last checked 12 October 2026.
Quick Working for Families estimate
Updates instantly$132/week
For combined annual family income of $100,000 and 2 dependent children.
Per week
$132
Per fortnight
$265
Per year
$6,892.5
Quick estimate includes FTC, IWTC and Best Start
Minimum Family Tax Credit needs your income split and work hours, so it is not included yet.
The income abatement uses the full Family Tax Credit.
$0/week
Paid work qualifies, but abatement left after Family Tax Credit reduces this payment.
$132/week
Open the optional detailed check to test your MFTC eligibility.
-/week
No child aged under 3 was entered.
$0/week
Your family income is $55,100 above the $44,900 threshold, so Family Tax Credit and then In-Work Tax Credit are reduced by up to $15,152.50 for the year.
Best Start has its own income test: this estimate includes a separate annual reduction of $4,410.
The eldest child uses the $7,921 annual rate. Each additional child uses the $6,454 annual rate, before income reduction.
Estimate only. Check your actual entitlement with IRD. Weekly and fortnightly instalments are rounded down, and IRD squares up the year using your actual circumstances.
Estimate only. Check your actual entitlement with IRD. Shared care, residency, principal-caregiver tests, exact Best Start dates and family-scheme income adjustments can change the result.
The calculator first works out the full annual amount for each payment. It then applies the main income abatement to Family Tax Credit, carries any unused reduction to In-Work Tax Credit, calculates MFTC separately and applies Best Start’s separate income test.
The eldest dependent child has a full-year rate of $7,921 and each subsequent child has $6,454. Current rates depend on child order, not an age band.
Family income above $44,900 creates a 27.5% reduction. It comes off FTC first, then any remainder comes off IWTC.
IWTC requires paid work but has no current minimum-hours test. MFTC separately requires 20 hours for a single parent or 30 combined hours for a couple.
Each child entered as under 3 adds up to $4,041. The combined amount reduces by 21% of family income over $79,000.
Real calculation scenarios
These examples use the same calculation function as the live tool. Amounts are estimates for a full year and weekly instalments are rounded down.
Worked example
Two children aged 4 and under 1, 25 paid-work hours a week, salary or wages and no main benefit.
$583/week
Worked example
Two children aged 9 and 6, each adult earns $50,000 and both are in paid work.
$132/week
Worked example
One child aged under 1, combined family income of $83,500 and paid work without a main benefit.
$154/week
Working for Families uses family-scheme income, which can include more than salary and wages. Use the annual amount held or expected by IRD where possible, including your partner and any required adjustments.
MFTC uses family income after income tax. For couples, tax is calculated for each person separately, so the form asks for each adult’s gross income instead of treating the couple as one taxpayer.
This combined calculator uses age bands for a whole-year estimate. A birth during the year, a third birthday or Paid Parental Leave can change payment dates. Use the dedicated Best Start calculator for that timing.
Use IRD’s calculator when care is shared, income needs family-scheme adjustments, a child’s dependency is uncertain, work changes during the year or another government payment applies.
Every rate, threshold, abatement percentage and hours rule is stored in lib/wff/rates.ts and was checked against current Inland Revenue material. Update that one file for a new tax year.
Last checked 12 October 2026. This is general information, not tax or financial advice.
It depends on your family income, dependent children, paid-work situation and the payment-specific rules. The quick estimate checks Family Tax Credit, In-Work Tax Credit and Best Start. Open the optional detailed check to include Minimum Family Tax Credit.
Use your estimated Working for Families family income for the full tax year before tax. This generally combines your income and your partner’s income, with family-scheme adjustments that can differ from a simple salary total.
No minimum-hours test has applied to the In-Work Tax Credit since July 2020. You must normally have income from paid work and meet the other rules. The 20-hour single-parent and 30-hour couple tests still apply to the Minimum Family Tax Credit.
You may qualify for Family Tax Credit and Best Start, but a main benefit prevents entitlement to the In-Work Tax Credit and Minimum Family Tax Credit.
It estimates a whole-year Best Start rate for each child counted as under 3, including the separate income test. Use the dedicated Best Start calculator for birth dates, Paid Parental Leave and exact payment timing.
A child aged 18 or under can potentially be a dependent child, but age alone does not prove eligibility. Their financial dependence, care arrangements and other Working for Families requirements still matter.
IRD uses your actual family-scheme income, eligibility dates, shared-care details, government payments and family circumstances. It also squares up the final entitlement after the tax year, so this planning estimate can differ.
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