KiwiSaver employer contributions explained

What are KiwiSaver employer contributions?

When you join KiwiSaver, your employer is required by law to contribute 3% of your gross salary or wages to your KiwiSaver account. This is a compulsory employer contribution, not optional. It's paid directly from your employer to your KiwiSaver provider, and it's one of the most valuable benefits of KiwiSaver membership. Over a 40-year career, an employer contribution of 3% can add tens of thousands of dollars to your retirement savings without you lifting a finger.

Understanding how employer contributions work, how tax affects them, and what you need to do to maximise this benefit is crucial for getting the most from your KiwiSaver. This guide explains the mechanics of employer contributions, tax obligations, and practical considerations for employees and those changing jobs.

The compulsory 3% employer contribution

How the 3% is calculated

Your employer contributes 3% of your gross salary or wages. Gross means before tax is deducted. So if you earn $50,000 per year, your employer contributes 3% of $50,000, which equals $1,500 per year (or $125 per month if paid monthly). This contribution is made regardless of how much you contribute yourself.

The contribution is calculated on your total remuneration from your employer. If you receive bonuses, commissions, or other payments, these may be included in the calculation depending on your employment agreement. Check your contract or ask payroll how your gross income is calculated, as this directly affects the employer contribution amount.

Is it on top of your salary or part of it?

This is a critical question many employees ask. The employer contribution can be structured in two ways: on top of your salary (increasing your total cost to the employer) or taken from your salary (salary sacrifice). By default, most employers pay the 3% on top of your salary. However, some employers negotiate a salary sacrifice arrangement where the 3% comes out of your gross pay instead.

In reality, the difference to you is significant. If it's on top, you receive the 3% as a gift from your employer without any deduction from your gross salary. If it's salary sacrifice, the 3% is deducted from your gross before your personal tax is calculated, which can create some tax efficiency. However, you need to be careful here—read your employment contract to understand which arrangement applies to you.

ESCT tax on employer contributions

What is ESCT?

ESCT stands for Employer Superannuation Contribution Tax. It's a tax on employer contributions to KiwiSaver (and other superannuation schemes). When your employer makes a 3% contribution to your KiwiSaver, they must also pay ESCT to the IRD. This tax is the employer's responsibility, not yours directly, but it reduces the amount that actually reaches your KiwiSaver account.

ESCT rates vary depending on your income level and personal tax rate. The IRD uses your tax code to determine your ESCT rate, which means ESCT is personalised to your situation. This is the most important thing to understand: not everyone pays the same ESCT on their employer contributions.

ESCT rates by income bracket and tax rate

ESCT rates are linked to your personal income tax rate. Here's how it works:

Personal tax rate	ESCT rate	Effective employer contribution after ESCT
10.5% (under $14,000)	0.5%	2.99%
17.5% ($14,001–$48,000)	10.5%	2.68%
30% ($48,001–$70,000)	17.5%	2.47%
33% ($70,001–$180,000)	21%	2.37%
39% (over $180,000)	21%	2.37%

The table shows that higher earners pay more ESCT on their employer contributions. For example, someone earning $60,000 (in the 30% tax bracket) will have 17.5% ESCT deducted from their employer contribution, meaning only 2.47% actually reaches their KiwiSaver account. Someone earning $12,000 (10.5% tax bracket) will only pay 0.5% ESCT, keeping 2.99% of the employer contribution.

How ESCT is calculated and paid

Your employer calculates ESCT based on your tax code. The ESCT is paid to the IRD, and the balance (after ESCT) goes to your KiwiSaver provider. You don't have to do anything—your employer handles all the calculations and payments. The IRD reviews your ESCT annually to ensure the correct rate is being used.

Salary sacrifice arrangements

What is salary sacrifice?

Salary sacrifice is an optional arrangement where you agree with your employer to have the 3% employer contribution taken from your gross salary instead of being paid on top. This changes how the contribution affects your tax position. Under salary sacrifice, the 3% is deducted before your personal income tax is calculated, which can create some tax efficiency depending on your situation.

Tax implications of salary sacrifice

If you're on salary sacrifice, the 3% is deducted from your gross salary, reducing your taxable income. This means you pay less income tax overall. However, you still pay ESCT on the employer contribution (based on your tax code). The net effect depends on your tax rate: higher earners benefit more from salary sacrifice because the income tax saved is greater than the ESCT paid.

Example: A person earning $60,000 on salary sacrifice saves 30% income tax on the $1,800 employer contribution (30% of $1,800 = $540 saved), but pays 17.5% ESCT ($315). The net benefit is $225 per year. This varies by income level.

Is salary sacrifice worth it?

This depends on your income and tax rate. Generally, higher earners benefit more. If your employer offers salary sacrifice, ask payroll to calculate the net impact for your salary. It can be worth pursuing if the tax savings outweigh any downsides, such as lower take-home pay or reduced entitlements (though most benefits are calculated on gross salary, so this isn't usually a major issue).

Changing jobs and employer contributions

What happens to employer contributions when you leave a job?

When you leave your job, your old employer stops making contributions. However, any contributions already made to your KiwiSaver remain there and continue to be invested. They don't get forfeited or returned.

Your new employer will start making contributions once you're enrolled in their payroll system. If your new employer uses a different KiwiSaver provider than your old one, you'll need to decide whether to switch providers or maintain multiple accounts. Most people consolidate into one account with their new employer's provider.

Gap in contributions between jobs

If there's a gap between leaving one job and starting another, you won't receive employer contributions during that time. This is expected and normal. Once you start your new job, employer contributions resume immediately.

Updating your employer with your KiwiSaver details

When you join a new employer, you must provide your KiwiSaver member details (provider name and your account identifier) so they can send contributions to the correct account. Provide this information when you're onboarded to payroll. If you don't provide the correct details, contributions might go to the wrong account or accumulate somewhere unintended.

How employer contributions affect your KiwiSaver balance

Over a 40-year career from age 25 to 65, a 3% employer contribution adds up significantly. Assuming a $50,000 starting salary with 2% annual increases and a 5% average annual investment return, the employer contribution alone would grow to over $130,000 by retirement. This demonstrates why employer contributions are such a valuable part of KiwiSaver.

Your total KiwiSaver balance comprises: your employee contributions, employer contributions, government contributions (up to $521.43 per KiwiSaver year if you contribute $1,042.86), and investment returns on all of these. The employer contribution is typically the second-largest source of your savings after investment returns.

Maximising your employer contribution benefit

Contribute enough to receive full government matching

While your employer must contribute 3%, you're not required to contribute from your own salary. However, if you contribute at least $1,042.86 per KiwiSaver year, the government will match with $521.43. This is free money. If you can afford it, contributing just enough to trigger the full government contribution (as little as 4% of your salary if your employer contributes 3%) creates a strong savings boost.

Ensure you're on the correct tax code

Your ESCT is based on your tax code. If your tax code is wrong, you might be paying more ESCT than necessary. Check your tax code annually with the IRD (via myIR online) and update it if your circumstances change. A correct tax code ensures ESCT is calculated accurately.

Consider salary sacrifice if you're a higher earner

If you earn over $70,000, salary sacrifice might offer tax benefits worth investigating. Ask your payroll team to model the impact for your specific salary.

Don't leave an employer without confirming contributions transferred

When you change jobs, confirm that your old employer's final KiwiSaver contribution was paid before you leave. Check your KiwiSaver statement a week or two after your last day to ensure the final contribution arrived.

Common questions about employer contributions

Many employees are confused about how their employer contribution is taxed, whether it's truly on top of their salary, and what happens if they change jobs. These are legitimate questions, and understanding the answers helps you make the most of this benefit.