What Is the MESL Tax Code in New Zealand?

MESL means ME SL, a New Zealand main income tax code for people who qualify for the Independent Earner Tax Credit (IETC) and have a student loan. The ME component relates to eligibility for the IETC, while SL tells your employer to deduct student loan repayments from your pay.

If you have a student loan and meet the requirements for the IETC, ME SL may be the appropriate tax code for your main job. If your circumstances change, such as your income changing or your student loan being fully repaid, you may need to change your tax code and give your employer a new IR330 form.

Quick answer: MESL is commonly written as ME SL. It is a main-income tax code that combines the ME tax code with student loan deductions.

What Does MESL Mean?

When people search for “MESL tax code NZ”, they are usually referring to the ME SL tax code.

The code can be understood as:

• ME = main income tax code that incorporates the Independent Earner Tax Credit (IETC), where eligible.
• SL = student loan deductions apply.

Therefore, ME SL is generally used for your main source of salary or wages when you qualify for the IETC and have a student loan.

IRD states that employees who qualify for the IETC can choose ME, or ME SL if they have a student loan, for their main job.

For more information about dealing with IRD, see our IRD Help NZ guide.

MESL vs ME: What Is the Difference?

The key difference between MESL and ME is the student loan component.

IRD identifies ME and ME SL as main employment codes, while secondary employment uses codes beginning with S.

Who Should Use the ME SL Tax Code?

You may be able to use ME SL if:

1. You have a main job.
2. You have a student loan.
3. You qualify for the Independent Earner Tax Credit.
4. Your income and personal circumstances meet the requirements for the IETC.

For employees earning between $24,000 and $70,000 under the relevant IETC rules, IRD says the main-job tax code can be ME, or ME SL if the employee has a student loan.

However, the IETC has additional eligibility conditions, so simply earning within the income range does not automatically mean everyone can use ME SL.

IRD’s employer guidance says the IETC applies to eligible New Zealand tax residents with annual income between $24,000 and $70,000, with the credit reducing as income exceeds $66,000 and reaching nil at $70,000.

What Does the “SL” Mean in ME SL?

The SL stands for student loan.

When you select a tax code containing SL, your employer knows that student loan repayments need to be deducted from your salary or wages.

For the 2026 tax year, IRD says student loan repayments on a main job using an SL tax code are calculated at 12% of earnings above the applicable pay-period repayment threshold.

For example, IRD gives a weekly example where someone earns $600 before tax:

$600 − $464 = $136

$136 × 12% = $16.32

So the student loan repayment in that example is $16.32.

The important point is that SL affects your student loan deductions; it is not an additional income-tax rate.

How Does the MESL Tax Code Affect Your Pay?

Your employer uses your tax code to determine how much PAYE and other required deductions to take from your wages.

If you use ME SL, your payroll deductions take into account:

• PAYE income tax
• The Independent Earner Tax Credit, where you’re eligible
• Student loan repayments
• ACC earners’ levy where applicable

IRD explains that tax codes tell an employer or payer how much tax to deduct from income, while the tax rates determine how much tax applies to your total income.

This means choosing the correct tax code is important because the wrong code can result in too much or too little tax being deducted during the year.

You can also use our free NZ tax tools to help understand your tax calculations.

ME SL vs M SL: What’s the Difference?

This is one of the most common questions about the MESL tax code.

Both codes include SL, meaning student loan deductions apply.

The difference is the ME component.

M SL

M SL is generally used for a main source of income where student loan deductions apply but the employee is not using the ME tax code.

ME SL

ME SL is used where the employee qualifies to use the ME tax code and also has a student loan.

The ME code incorporates the Independent Earner Tax Credit for eligible employees, which can reduce PAYE deductions during the year.

Simple way to remember it:

M SL = main income + student loan
ME SL = main income + IETC + student loan

ME SL vs M: Which Tax Code Is Right?

The answer depends on your circumstances.

If you have a student loan, the relevant comparison is generally ME SL vs M SL, rather than ME SL vs M.

If you qualify for the IETC and meet the other requirements, ME SL may be appropriate for your main job.

If you do not qualify for the IETC, you may need to use M SL instead.

IRD recommends using its tax-code tool or the IR330 Tax Code Declaration to determine the appropriate code for your situation.

What If You Have a Second Job?

This is where tax codes can become confusing.

Your main job can use a main tax code such as ME SL.

But if you have another source of taxable employment income, that income may need a secondary tax code.

IRD says that if you have taxable income from more than one source at the same time, you may need a secondary tax code because your additional income can push your total income into a higher tax bracket.

Current secondary tax codes include:

These are based on your estimated total annual income from all sources, not simply the income from your second job.

Important: ME SL Is Not a Secondary Tax Code

ME SL is not the same thing as a secondary tax code.

ME SL is a main-income tax code. Secondary tax codes include SB, S, SH, ST and SA.

Do You Need to Use ME SL If You Have a Student Loan?

Not necessarily.

Having a student loan does not automatically mean ME SL is your correct tax code.

You need to consider:

• Whether the income is your main income
• Whether you qualify for the IETC
• Your expected annual income
• Whether you have other income
• Whether your student loan is still active
• Whether your circumstances have changed

IRD recommends using its tax-code tool or IR330 form to determine the correct code.

What Happens When You Pay Off Your Student Loan?

If you completely repay your student loan, you generally no longer need the SL component of your tax code.

For example, you may move from M SL to M after paying off your student loan.

Similarly, if you were using ME SL, you may need to move to ME if you remain eligible for the ME tax code but no longer have a student loan.

You should tell your employer or payer when your tax code changes and provide an updated IR330 Tax Code Declaration where required.

How to Change Your ME SL Tax Code

If your circumstances change and you need a different tax code, the process is straightforward.

Step 1: Check Your Correct Tax Code

Use the IRD tax-code tool or the IR330 Tax Code Declaration.

Step 2: Complete the IR330

Enter your relevant details and select the tax code that applies to your situation.

Step 3: Give the Form to Your Employer

If you receive salary or wages, give the completed IR330 to your employer.

If you need assistance with an IRD issue, you can also visit our IRD Guru contact page.

What If You Use the Wrong Tax Code?

Using the wrong tax code can affect how much is deducted from your pay.

For example, if too little tax is deducted throughout the year, you could have tax to pay after your income tax assessment.

If too much is deducted, you may receive a refund.

IRD explains that choosing the correct tax code helps ensure the right amount of tax is deducted during the year and can reduce the possibility of an unexpected tax bill or overpayment.

If your income or circumstances change, you should review your tax code rather than continuing to use the old one.

Frequently Asked Questions About the MESL Tax Code

What is the MESL tax code in NZ?

MESL generally refers to ME SL, a main-income tax code for eligible people who qualify for the Independent Earner Tax Credit and have a student loan.

Is MESL a secondary tax code?

No. ME SL is a main-income tax code. Secondary tax codes include SB, S, SH, ST and SA.

What does ME SL stand for?

ME refers to the main-income tax code associated with the Independent Earner Tax Credit, while SL indicates that student loan deductions apply.

What is the difference between ME and ME SL?

The key difference is the student loan. ME SL includes student loan deductions, while ME does not.

What is the difference between M SL and ME SL?

Both include student loan deductions. ME SL is for eligible employees using the ME/IETC code, while M SL is the standard main-income code with student loan deductions.

Does ME SL reduce my tax?

ME SL can reduce PAYE deductions where you are eligible for the Independent Earner Tax Credit. However, SL also means student loan repayments are deducted from your pay.

What happens if I pay off my student loan?

You should update your tax code because you will no longer need the SL component. For example, you may move from ME SL to ME if you remain eligible for ME.

How do I know if ME SL is right for me?

Use the IRD tax-code tool or the IR330 Tax Code Declaration. Your correct tax code depends on your income, student loan status and other circumstances.

Final Takeaway: MESL Tax Code NZ

The MESL tax code, commonly written as ME SL, is a main-income tax code for eligible employees who qualify for the Independent Earner Tax Credit and have a student loan.

The easiest way to understand it is:

• ME = eligible main-income/IETC code
• SL = student loan deductions
• ME SL = both together

If you start a new job, take on additional income, repay your student loan, or experience a significant change in your income or circumstances, check whether your tax code still applies.

For the most accurate answer for your individual circumstances, use the official IRD tax-code tool and IR330 guidance rather than choosing a code based only on the name.

Official IRD Resources

• What tax code should I use?
• About tax codes
• Secondary tax codes
• IR330 Tax Code Declaration
• Student loan repayments on salary and wages