Student Loan Repayment Calculator Australia 2025-26: Your Complete Guide to HECS-HELP & Study Loans

If you're one of the millions of Australians carrying a student loan from your university or vocational education days, understanding exactly how much you'll repay each year is crucial for your financial planning. Whether you have HECS-HELP, FEE-HELP, VET Student Loans, or even an older SFSS debt, the Australian Taxation Office (ATO) manages all these study and training loans through the same income-contingent repayment system. This comprehensive guide walks you through using a student loan repayment calculator effectively, explains the FY 2025-26 repayment thresholds and rates, and provides strategies to manage your debt while building your career.

Understanding Australia's Student Loan System

Australia's higher education financing system is unique compared to many other countries. Instead of requiring upfront tuition payments or private bank loans with fixed repayment schedules, the Australian Government offers several Higher Education Loan Program (HELP) schemes that allow students to defer their education costs until they're earning a reasonable income.

The main types of study loans include HECS-HELP (for Commonwealth-supported university places), FEE-HELP (for full-fee paying students), VET Student Loans (for vocational education and training), and SA-HELP (for student amenities fees). There's also the legacy Student Financial Supplement Scheme (SFSS) for older loans. While these loans have different purposes and eligibility criteria, they all share the same repayment mechanism through the Australian tax system.

What makes these loans particularly borrower-friendly is that they're income-contingent. You only start repaying when your income reaches a specific threshold, and the amount you repay is calculated as a percentage of your income rather than a fixed monthly amount. This means if you're between jobs, working part-time, or taking a career break, you won't need to make any repayments until your income recovers. Use our HECS-HELP Calculator to see exactly how much you'll repay based on your current income.

Student Loan Repayment Thresholds and Rates for FY 2025-26

For the 2025-26 financial year, significant changes have been introduced to the student loan repayment system. The compulsory repayment threshold has increased from $54,435 to $67,000, providing meaningful relief for lower-income graduates who previously found themselves making repayments on modest salaries. This change alone means thousands of Australians who were repaying their loans last year may now be below the threshold.

Additionally, the repayment structure has shifted from a flat percentage of total income to a marginal repayment system. Under this new approach, you only pay on the portion of income above each threshold, rather than on your entire income. This makes the system more progressive and reduces the repayment burden for those in lower and middle income brackets.

Your repayment income is broader than just your taxable salary. It includes your taxable income, reportable fringe benefits from your employer, reportable employer super contributions (including salary sacrifice amounts), total net investment losses, and exempt foreign employment income. For most employees, repayment income equals their taxable salary — but if you have additional income sources or benefits, they may push you into a higher repayment bracket.

Source: ATO study and training loan repayment rates, FY 2025-26. The new marginal system means you only repay on income above each threshold, not your total income.

Your compulsory student loan repayment will never exceed your actual outstanding balance. If your calculated repayment is more than you owe, the ATO will only take what's needed to clear your debt. This means you won't overpay even as your income increases significantly.

How Indexation Affects Your Student Loan Balance

One of the most misunderstood aspects of Australian student loans is indexation. Unlike traditional loans that charge interest, study loans don't have an interest rate. Instead, they're indexed annually on 1 June to maintain their real value in line with inflation. The indexation rate is based on the Consumer Price Index (CPI) and changes each year depending on economic conditions.

Recent years have seen significant indexation increases due to post-COVID inflation. The 2023 indexation rate reached a record 7.1%, followed by 4.7% in 2024. For 2025, the indexation rate has moderated to 3.2%. This means a $40,000 HELP balance would grow by approximately $1,280 in 2025 — even without borrowing any additional amounts. For graduates with large debts who earn below the repayment threshold, this can be concerning as their balance continues to grow despite not making any repayments.

The good news for existing borrowers? The Government implemented a 20% reduction on historical HELP debts that took effect on 1 June 2025. If you had an outstanding HELP balance before this date, your debt was automatically reduced by 20%. This relief measure acknowledged the disproportionate impact of high indexation rates on graduates and provided meaningful debt reduction for millions of Australians. Check your current balance through MyGov to see how much your debt decreased.

Using a Student Loan Repayment Calculator Effectively

A quality student loan repayment calculator helps you understand not just your annual repayment amount, but your complete financial picture. When using any calculator, it's important to input your repayment income rather than just your base salary. This means including any reportable fringe benefits, investment income, or other amounts that the ATO considers when calculating your repayment.

The most useful calculators will show you your total annual repayment, how this translates to weekly or fortnightly amounts from your pay, and how your repayment fits into your broader tax obligations including income tax and the Medicare Levy. This complete view helps you budget effectively and understand exactly how much money you'll actually take home.

Beyond calculating your current repayment, consider using calculators to model different scenarios. What happens to your repayment if you get a raise? How does changing jobs or working overtime affect your annual repayment? What if you make voluntary repayments before the 1 June indexation date? Understanding these dynamics helps you make informed decisions about your career and finances. Our Take-Home Pay Calculator integrates your student loan repayment with all other deductions to show your true net income.

Should You Make Voluntary Student Loan Repayments?

Unlike many other debts, making voluntary repayments on your student loan isn't always the smartest financial move. Because study loans have no interest rate and only require repayments when you're earning above the threshold, they're often considered one of the "cheapest" debts you can carry. However, there are specific situations where voluntary repayments can make sense.

When voluntary repayments are worth considering: If you're approaching the end of your debt and want to clear it before indexation is applied on 1 June, making a voluntary repayment can save you money. For example, if you owe $5,000 and expect 3.2% indexation, paying it off before June saves you $160 in indexation. Similarly, if you're expecting a significant income increase that will push you into a higher repayment bracket, paying down your balance early might reduce your future compulsory repayments. You can make voluntary repayments anytime through ATO Online Services via MyGov.

When to prioritize other financial goals: If you have high-interest debt like credit cards or personal loans, those should almost always be paid off first. You should also prioritize building an emergency fund and contributing to your superannuation (especially if you're eligible for the government co-contribution) before making voluntary student loan repayments. For a complete picture of your finances, try our calculators to see your net income after all deductions including your student loan.

How Salary Sacrifice Interacts With Student Loan Repayments

Many Australians use salary sacrifice arrangements to reduce their taxable income and save on tax. Common examples include salary sacrificing into superannuation, novated leases for cars, or portable electronic devices. While salary sacrifice can be an effective tax strategy, it's crucial to understand how it interacts with student loan repayments.

Here's the key point: salary sacrifice does NOT reduce your student loan repayment income. When calculating your compulsory repayment, the ATO adds back any reportable employer super contributions and reportable fringe benefits to your taxable income. So if you earn $95,000 and salary sacrifice $15,000 into super, your taxable income becomes $80,000 — but your student loan repayment income remains $95,000.

This doesn't mean salary sacrifice isn't worthwhile — you'll still save on income tax by paying 15% contributions tax inside super instead of your marginal tax rate (which could be 32.5%, 37%, or 45% depending on your income). However, your student loan repayment won't decrease as a result of the strategy. Before implementing salary sacrifice, it's worth modeling the complete impact on your finances using our Salary Sacrifice Calculator.

Student Loan Repayments and Your Tax Return

At tax time, the ATO automatically calculates your compulsory student loan repayment based on your income for the financial year. This appears as a separate line item on your Notice of Assessment — distinct from your income tax liability and Medicare Levy obligations. If your employer has been withholding the correct amount throughout the year, your student loan repayment should be covered by these withholdings.

To ensure your employer withholds enough tax to cover your student loan repayment, you need to indicate that you have a study or training support loan when completing your Tax file number declaration or withholding declaration. Your payroll department will then use the ATO's tax tables to calculate the appropriate additional withholding each pay period. If you don't declare your student loan, you may face a bill at tax time because insufficient tax was withheld.

It's also worth noting that student loan repayments are not tax-deductible. Unlike some other expenses that can reduce your taxable income, student loan repayments are made from your after-tax income and don't provide any tax benefit. For a comprehensive view of your tax obligations including income tax, Medicare Levy, and your student loan, our suite of calculators can help you plan ahead.

Summary: Student Loan Repayments in FY 2025-26

• The student loan repayment threshold is now $67,000 (increased from $54,435), providing relief for lower-income graduates
• The new marginal repayment system means you only repay on income above each threshold, not your total income
• Repayment rates range from 15c per dollar over $67,000 up to 10% of total income for high earners above $179,286
• Student loan debts are indexed annually on 1 June based on CPI — 3.2% in 2025
• The 20% debt reduction applied to historical HELP balances on 1 June 2025
• Salary sacrifice does not reduce your student loan repayment income — reportable benefits are added back
• Voluntary repayments can be made anytime via MyGov → ATO Online Services, but may not always be the best financial priority
• Your employer should withhold additional tax if you've declared your student loan on your TFN declaration

Understanding your student loan repayment obligations is an essential part of managing your overall financial picture. Use our free Australian calculators to explore your complete tax and repayment position:

• HECS-HELP Calculator — estimate your specific student loan repayment based on your income
• Take-Home Pay Calculator — see your net income after income tax, Medicare Levy, super, and student loan repayments
• Income Tax Calculator — calculate your FY 2025-26 income tax under the Stage 3 tax cuts
• Salary Sacrifice Calculator — understand how salary sacrificing affects your tax (but not your student loan repayment)
• Superannuation Calculator — project your retirement savings and employer contributions
• Medicare Levy Calculator — check your Medicare Levy and Surcharge obligations