STSL - Study and Training Support Loans
STSL means Study and Training Support Loans, an Australian umbrella term used for government study and training loan debts in tax and payroll calculations.
STSL can include debts under schemes such as HELP and VET Student Loans. When an employee tells a payer that they have an applicable debt, payroll may withhold an additional amount once their earnings reach the relevant pay-period threshold.
That payroll withholding is not a live repayment applied directly to the employee’s loan after every payday. It forms part of the amounts withheld toward the employee’s overall tax position; the compulsory STSL repayment is calculated when the ATO assesses the tax return.
Where STSL Appears
You may see STSL in:
- tax file number declarations and employee tax settings
- PAYG tax tables
- draft pay runs and payroll reports
- payslips as additional tax withholding rather than a separate lender payment
- individual tax returns and notices of assessment
- ATO loan-account statements and voluntary repayment records
STSL is not an ordinary deduction chosen by the employer. The payer uses the employee’s declaration and the current ATO withholding schedule.
Payroll Withholding, Compulsory Repayments And Voluntary Repayments
| Item | When It Happens | What It Does |
|---|---|---|
| Additional Payroll Withholding | During relevant pay periods | Adds to PAYG amounts withheld toward the employee’s assessed tax position |
| Compulsory Repayment | When the ATO assesses the annual tax return | Calculates the required repayment from annual repayment income |
| Voluntary Repayment | When the borrower chooses to pay the ATO directly | Reduces the outstanding loan balance but does not normally replace an annual compulsory amount |
Keeping these three events separate prevents a common misunderstanding: extra tax shown on a payslip does not necessarily equal the final compulsory repayment for the year.
How STSL Works In Practice
The employee completes a declaration indicating an applicable study or training loan. Payroll combines that choice with gross earnings, pay frequency and the current Schedule 8 formula to calculate the additional withholding.
The ATO updated Schedule 8 and the PAYG withholding tax tables to apply from 1 July 2026. Thresholds and formulas can change between income years, so payroll should use the schedule effective on the payment date rather than a remembered rate.
At tax time, the ATO uses repayment income, which can include more than taxable income, to determine whether a compulsory repayment applies and how much it is. Other income, deductions and payroll withholding across several jobs can make the assessed result differ from the amount one employer withheld for STSL purposes.
Simple Example
An employee declares an STSL debt and earns enough in a fortnight for the current payroll formula to calculate extra withholding. The employer includes that amount with PAYG withholding and reports the payroll result.
Later, the employee lodges their tax return. The ATO calculates the compulsory repayment using the employee’s full-year repayment income and credits the total tax already withheld against the person’s assessed liabilities. It is the assessment, not the fortnightly label alone, that determines the final repayment.
For an individual estimate, the ATO’s tax withheld calculator can check withholding using current declarations and pay details. It is not a substitute for the annual assessment.
Why STSL Matters
If the employee’s declaration is missing or recorded incorrectly, the pay run may withhold too little or too much. Too little withholding can contribute to a tax bill, while too much reduces take-home pay until the employee’s annual position is reconciled.
Employers should not ask for the employee’s loan balance or try to calculate the annual compulsory repayment. Their payroll task is to apply the declaration and current withholding rules to each payment.
Regional Variations
STSL is an Australian term. New Zealand student-loan deductions, the United Kingdom’s student-loan plans and other countries’ repayment systems have different declarations, thresholds and payroll formulas. They should not be configured as Australian STSL.
How Gimbla Can Help
Gimbla Payroll can keep an employee’s STSL declaration with their tax settings and include the applicable additional withholding in the pay-run calculation. The employer should review the declaration and use the current rules before finalising payroll.
Related Terms
Helpful Gimbla Guides
- Weekly And Fortnightly PAYG Withholding For 2026–27
- Small-Business Payroll In Australia
- Create An Employee In Gimbla
In Short
STSL covers Australian government study and training loan debts in tax and payroll. Payroll may withhold an additional amount during the year, while the ATO calculates any compulsory repayment when it assesses the employee’s annual return.