Separate employee and employer contributions
This calculator shows annual employee KiwiSaver deductions, gross employer contributions, estimated employer superannuation contribution tax and the employer amount remaining after that tax. It then adds the employee and net employer amounts to show the estimated total reaching the fund. Keeping those components visible prevents a common mistake: assuming the full advertised employer percentage arrives in the account without ESCT.
Enter gross annual salary and the employee and employer percentages that apply to your arrangement. The standard default employee and matching employer minimum is 3.5% from April 2026, with a further scheduled increase to 4% in April 2028. A 3% employee scenario is included for an approved temporary rate reduction. The calculator does not determine eligibility for that reduction or whether an employer must match a particular higher employee rate.
A worked contribution example
For salary of $50,000 and both contribution rates set to 3.5%, the employee amount is $1,750 and the gross employer amount is also $1,750. If the applicable ESCT rate is 17.5%, the estimated tax on that employer amount is $306.25. The net employer contribution is $1,443.75, making the combined annual contribution $3,193.75. That total is retirement saving, not additional take-home cash.
At salary of $80,000, an employee rate of 4% produces $3,200. A 3.5% employer rate produces $2,800 gross. With a 30% ESCT rate, estimated employer tax is $840 and the net employer contribution is $1,960. The combined result is $5,160. This example demonstrates why a higher employee choice does not automatically imply the same employer percentage.
Choosing the ESCT threshold income
The ESCT income input is separate from current salary. It represents the earnings-plus-gross-employer-contributions amount used to establish the employee's ESCT band under the applicable rules. Depending on employment history, the relevant basis can involve the prior year or an estimate for the current year. Do not assume current base salary alone always selects the correct rate. Confirm the appropriate basis with payroll or IRD.
The current table used here has thresholds of $18,720, $64,200, $93,720 and $216,000, with rates of 10.5%, 17.5%, 30%, 33% and 39%. Unlike progressive income tax, the selected ESCT band rate is applied to the employer contribution as a whole. Splitting the contribution itself across those income thresholds would be a different calculation and would understate tax in many ordinary cases.
Annual estimate and payroll rounding
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The model multiplies annual salary by each percentage, then applies the selected ESCT rate to the annual employer contribution. It rounds the displayed components to cents. Payroll calculations operate on contributions within pay periods and can use prescribed whole-dollar and cent conventions. As a result, this annual estimate should not be described as an exact reconstruction of every payday's ESCT.
When checking an account statement, compare the time period as well as the amount. Deductions made in payroll and amounts received by a provider may not appear on the same day. A timing difference is not necessarily a missing contribution. Use the payroll record, IRD record and fund statement together when investigating a material discrepancy, keeping employee and employer amounts separate throughout the reconciliation.
Employment-package assumptions
The calculator assumes the salary entered is the relevant gross pay and treats the employer contribution as an additional contribution for the purpose of showing fund inflows. A total-remuneration agreement can describe the package differently. The tool does not determine whether an employer contribution is on top of a quoted package or included within it, and it does not interpret contractual clauses about tax or contribution costs.
Before comparing two offers, obtain the cash salary, employer rate and package wording for each. Run each scenario on a consistent basis. A larger headline package may not mean more take-home pay or a larger net retirement contribution. Keeping those outcomes separate is more informative than combining salary and gross employer contribution into one number without accounting for ESCT.
Using the result in a projection
The total contribution output can be used as an annual input to the separate KiwiSaver retirement projection. That projection expects contributions after employer tax. Entering the gross employer amount again would overstate future inflows. Government contributions, voluntary lump sums and fees are not added automatically here; include eligible and confirmed amounts separately if you use them in a longer-term scenario.
A fixed annual contribution also assumes salary and rates remain unchanged. Over a long horizon, pay growth, contribution changes, employment breaks and the scheduled default-rate increase can make that assumption unrealistic. Use several scenarios or update the annual amount for different periods rather than treating today's result as a promise of every future year's deposits.
Check before relying on the estimate
Confirm contribution eligibility, any suspension or temporary reduction, the employer percentage and the ESCT threshold basis. Zero contributions are allowed for scenario analysis, but selecting zero does not establish permission to stop deductions. The output is an annual arithmetic estimate. For a payroll instruction or dispute, use current IRD guidance and the actual employment and contribution records.
Frequently asked questions
Why is the employer amount smaller after tax?
ESCT is deducted from the gross employer contribution in this model. The employee contribution and net employer contribution are then added to estimate fund inflows.
Is 3% the standard rate from April 2026?
No. The standard default is 3.5%. The 3% employee option is included for an approved temporary rate reduction, not as the ordinary default.