HECS for Sole Traders: How ABN Income Is Repaid

Sole traders repay HECS-HELP once a year through their tax return, not per pay cycle. The ATO calculates a compulsory repayment on your repayment income - broadly taxable income plus reportable super and investment losses - and adds it to your notice of assessment as a single bill. Because PAYG instalments do not cover HECS, ABN earners who have not set money aside routinely get caught by a four-figure repayment at tax time.

Why ABN income is treated differently from wages

Employees have HECS handled invisibly: they tick the study-loan box on the TFN declaration and the employer withholds extra tax every payday, which the ATO later applies to the compulsory repayment. There is no equivalent mechanism for a sole trader. No one withholds anything from your invoices, and even if you are in the PAYG instalment system for income tax, those instalments are calculated on your expected income tax only - the study loan component is excluded. The whole repayment therefore lands when your return is assessed. This is not a penalty or an error; it is simply how the system is designed, and it means the cash-flow planning employees never think about is entirely your job. The first year of freelancing is where most people get burned, because there is no assessment history to prompt them and the previous year's employer withholding created the illusion that HECS takes care of itself.

What counts as repayment income for a sole trader

Your repayment is not calculated on turnover, and not exactly on taxable income either. The ATO uses repayment income, which starts from taxable income and adds back several items so that salary-packaging and negative gearing cannot shrink the repayment base.

Two consequences follow. Business deductions genuinely lower your HECS repayment because they lower taxable income - a real difference from an employee whose gross salary is the base. But deductible super contributions do not: putting $10,000 into super reduces income tax yet is added straight back for the HECS calculation. Plenty of sole traders discover this only when the assessment does not match their estimate. You can model the interaction with our HECS repayment calculator by entering your projected repayment income rather than raw profit.

How much you will repay under the 2025-26 marginal system

From 1 July 2025 the repayment system changed from average rates to marginal rates. Under the old design, crossing the threshold by one dollar triggered a percentage of your entire income. Now nothing is payable on income up to the threshold (set at $67,000 for 2025-26 and indexed after that), a first marginal rate applies only to income between the threshold and an upper band around $125,000, and a higher marginal rate applies above that. The exact bands are indexed annually, so treat published figures as applying to their stated year.

A worked example: a freelance designer with $95,000 of repayment income owes 15% of $28,000, about $4,200. Under the old average-rate system the same income produced a broadly similar bill, but a $68,000 earner now owes about $150 instead of a couple of thousand, which is the reform's point. The marginal design also removes the old cliff where earning one more dollar cost you thousands - relevant for sole traders who could previously game invoice timing around the threshold. The current thresholds and rates are published on the ATO study and training support loans pages.

The tax-time bill: what it looks like in practice

When you lodge, the ATO computes tax on taxable income, then separately computes the study-loan repayment on repayment income, and both appear on the notice of assessment. If you paid PAYG instalments, they offset the income tax portion only; the HECS portion arrives essentially unfunded. On the $95,000 example above, a sole trader who set aside 30% of profit for tax may find the assessment roughly $4,200 higher than planned. The repayment is due by the assessment's payment date like any tax debt, and general interest charge applies if it slides. If the bill is genuinely unpayable, the ATO offers payment plans, and in cases of serious hardship you can apply to defer a compulsory repayment - but a payment plan on a predictable annual liability is a symptom of a savings-rate problem, not a solution.

A simple system to never be surprised

The fix is mechanical. First, estimate this year's repayment income each quarter - profit to date annualised, minus planned deductions, plus any add-backs. Second, apply the marginal bands to get the expected repayment. Third, park that amount, plus your income tax provision, in a separate high-interest saver you never invoice from. A sole trader expecting $95,000 should be moving roughly $110 a week for HECS alone. Fourth, re-run the numbers whenever a big contract lands. If you also do some employee work alongside the ABN, keep claiming the tax-free threshold correctly and tell the employer you have a study loan; their withholding will cover only the employee slice, and your quarterly review trues up the rest. Fifth, decide deliberately on voluntary repayments: paying extra before indexation on 1 June reduces the balance that gets indexed, which can be worthwhile when your balance is small and cash is idle, but for most sole traders the compulsory bill plus a business buffer is the priority.

Deductions, timing and edge cases worth knowing

Because repayment income tracks taxable income, ordinary year-end tactics move your HECS bill too: prepaying deductible expenses, writing off equipment under the instant asset rules applicable to the year, and timing invoice issue dates across 30 June all shift both tax and HECS in the same direction. Losses work as expected - if the business makes a taxable loss and your repayment income falls under the threshold, no compulsory repayment arises that year, and the debt simply carries forward with indexation. If you incorporate later, paying yourself a wage from your company puts you back in the employee withholding system for that salary. And if you head overseas while freelancing, the obligations follow you: non-resident HECS debtors must report worldwide income above the reporting threshold and make repayments, so an ABN earner moving to Bali does not escape the annual bill. Finally, remember the June 2025 one-off 20% balance reduction and the ongoing indexation changes when checking your balance - the debt shown in myGov is the figure the next repayment chips away at, and seeing it fall is the reward for running the system above.

Worked year: a freelancer's full HECS picture

Pull the threads together with a complete example. Priya leaves employment in July to freelance as a marketing consultant. Gross invoices for the year come to $130,000. Deductions - home office, software, insurance, super contribution of $8,000 claimed as a personal deduction, accounting fees - total $22,000, leaving taxable income of $108,000. Repayment income adds the $8,000 super back: $116,000. Under the marginal design she owes 15% of the slice above $67,000, so 15% of $49,000, roughly $7,350. Her income tax and Medicare on $108,000 run to roughly $24,000 to $25,000 depending on offsets, so her total tax-time obligation approaches $32,000 - none of it withheld by anyone. Had she saved 25% of every invoice from day one, she would have banked $32,500 and the assessment is a non-event; had she saved the folk-wisdom 20%, she is $6,000 short, and the shortfall is almost exactly the forgotten HECS component. That is the entire lesson of this article in one household: the percentage you set aside must be built from your own numbers, including the loan, not from a rule of thumb designed for people without one.

One more planning wrinkle for the first freelance year: the ATO will likely enter Priya into PAYG instalments after this assessment, based on the business income it now knows about. Those quarterly instalments will smooth next year's income tax but will still exclude the study loan, so her weekly set-aside for year two shrinks but does not disappear. Freelancers who treat the arrival of instalment notices as the signal that everything is now automated repeat the year-one surprise on a smaller scale in year two. The set-aside habit only retires when the debt does - which, on Priya's trajectory of $7,000-plus compulsory repayments a year against a mid-sized balance, is a genuinely visible horizon worth tracking in myGov each July. Her accountant's parting advice generalises to every ABN earner with a study loan: keep the HECS provision in the same separate account as the tax provision but on its own line in your spreadsheet, review both after every BAS quarter, and never treat a fat business account balance as spendable until the loan slice has been mentally subtracted. The freelancers who find HECS painless are not the ones earning less - they are the ones who made the annual bill boring by funding it fifty-two weeks early.

This article is general information, not financial, tax or legal advice. Figures are approximate and change over time — always verify with a qualified professional or the official source before making a decision.

Written and reviewed by the HECS Debt Calculator editorial team. Facts checked against primary sources; see the reference above.

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