Why does general AI compute my HECS repayment wrong?

Three reforms stacked within a year: from 2025-26 the repayment flipped from a flat percentage of your entire income to a marginal system with a $67,000 threshold; indexation was recut to the lower of CPI/WPI backdated to 2023 (7.1% became 3.2%); and a one-off 20% balance cut passed in July 2025. Models trained earlier still apply the old flat-rate table on the old thresholds — often confidently.

What counts as “repayment income”? Is it my salary?

No. It is taxable income (excluding assessable FHSS released amounts) plus reportable fringe benefits, total net investment loss (including net rental losses), reportable super contributions, and exempt foreign employment income. Salary-sacrificed super and negative-gearing losses are added back, so repayment income is often higher than salary.

Did I get the 20% cut? Do I need to apply?

If you had a HELP/VSL/AASL/SSL/SFSS balance on 1 June 2025, the ATO applied the 20% cut automatically — no application needed — before the 2025 indexation. Processing is complete. Check your myGov ATO loan account history if you don’t see it.

Why hasn’t my balance gone down even though my payslip shows study-loan withholding?

STSL withholding sits with the ATO during the year and is credited against the loan only once, at your tax assessment. Meanwhile the balance still indexes on 1 June. A voluntary repayment made before 1 June reduces the balance before indexation is applied; anything over-withheld is refunded at assessment.

I earn over $180k — why is my repayment 10% of everything?

The new system is marginal only up to a point: above the top edge ($179,285 in 2025-26; $186,050 in 2026-27) it switches to a flat 10% of your total repayment income. The edge sits near where the marginal and flat formulas cross, so there is no sudden jump — but above it the marginal framing no longer applies.

Loans & Debtdebt · income · planning

Australia HECS-HELP Repayment & Indexation (2025-26 reform)

Computes your compulsory HECS-HELP repayment under Australia’s reformed 2025-26 system — a marginal calculation (nil to $67,000, then 15% and 17% slices, then a flat 10% of total income at the top) that replaced the old flat-percentage-of-entire-income scale. Three reforms landed within a year (the marginal flip, indexation recut to the lower of CPI/WPI backdated to 2023, and a one-off 20% balance cut in July 2025), so general AI still computes the old system on the old thresholds. The tool also names the input people get wrong: ATO “repayment income” is not your salary — reportable super contributions and net investment losses are added back.

Basis: ATO 2025-26/2026-27 thresholds · indexation capped at lower of CPI/WPI · 20% cut (Jul 2025) · verified 2026-07-23

Don’t want to fill every field?

Describe your situation in a sentence — any language. I fill the form; the tool does the math.

Income yearThresholds are indexed to average weekly earnings each year, so the year changes the answer.ATO repayment income$NOT your salary. ATO “repayment income” = taxable income (excluding assessable FHSS released amounts) + reportable fringe benefits + total net investment loss (including net rental losses) + reportable super contributions + exempt foreign employment income. Salary-sacrificed super and negative-gearing losses are added back — a $95k salary with $10k reportable super contributions is $105k repayment income.HELP debt balance today$Your current HELP balance (myGov → ATO → loan accounts). Used for the indexation and payoff-horizon estimates. The default is the national average debt.Did you have a HELP balance on 1 June 2025?Balances as at 1 June 2025 received a one-off 20% cut (passed July 2025), applied automatically before that year’s indexation.

The numbers

Compulsory repayment (2026–27): $2,320.80; 15% of income over $69,528
Effective rate on repayment income: 2.7%; marginal — only income above the threshold is charged
Under the pre-2025 rules (indexed old scale): $3,400.00; 4% flat on your entire income
Indexation next 1 June at 2.8%: $772.80; illustrative — the actual rate is set each ~Feb–Mar (lower of CPI/WPI)
Years to clear at this income: 15 yr; assumes flat income and 2.8% indexation

Preview only — using a default Year, Repayment income, Had debt Jun 2025.

The operator’s read

Worth knowing

Your 2026–27 repayment is $2,320.80 — an effective 2.7% of your income, not the headline 15/17%, because the system is now marginal: only income above $69,528 is charged. The old system charged a flat percentage of your entire income.

Good sign

Under the pre-2025 rules (old scale indexed to 2026–27) you would have paid $3,400.00 — 4% flat on your whole income. The marginal reform saves you $1,079.20 this year.

Caution

Check your input: ATO repayment income adds BACK salary-sacrificed (reportable) super contributions, net investment losses including negative-gearing rental losses, reportable fringe benefits, and exempt foreign employment income. A $95k salary with $10k salary-sacrificed super is $105k repayment income — people who enter their salary understate the answer.

Worth knowing

The extra tax your employer withholds for the study loan (STSL) does NOT reduce your balance during the year — it sits with the ATO and is credited once at assessment, while the loan still indexes on 1 June. A voluntary repayment made before 1 June reduces the balance before indexation hits; over-withheld amounts come back at assessment.

Worth knowing

Next 1 June at 2.8% would add about $772.80 to your $27,600 balance. Your $2,320.80 repayment outruns it — at flat income you would clear the debt in roughly 15 years. Since 2023 the rate is capped at the lower of CPI and WPI (2023: 3.2%, 2024: 4.0%, 2025: 3.2%, 2026: 2.8%); each year’s rate is unknown until ~Feb–Mar.

Worth knowing

Your balance as at 1 June 2025 was cut 20% (Universities Accord Bill, July 2025) — automatically, before the 2025 indexation was applied (×0.80 then ×1.032, in that order; the sequencing matters). The ATO has finished processing; on the average $27,600 debt the cut was $5,520. If your balance history doesn’t show it, check your myGov ATO loan account.

Your next step

Australia Income Tax Calculator (2025-26) →The repayment sits on top of income tax — see the whole deduction picture.

Wrong answer, a missing option, or a tool you wish existed?

Methodology

Repayment (2025-26): nil to $67,000; 15% of income over $67,000 up to $125,000; $8,700 + 17% of income over $125,000 up to $179,285; from $179,286 a flat 10% of TOTAL repayment income (not marginal — the band edge is set near where the two formulas cross, so the step is cents, not a cliff). 2026-27 (AWE-indexed): nil to $69,528; 15% over $69,528 to $129,717; $9,028 + 17% over $129,717 to $186,050; flat 10% from $186,051. Amounts are computed exact to cents. Verified against ATO worked examples for 2026-27: $86,380 → $2,527.80; $137,064 → $10,276.99; $254,780 → $25,478.00 (read 2026-07-23).

Repayment income is the ATO definition, not salary: taxable income (excluding assessable FHSS released amounts) + reportable fringe benefits + total net investment loss (including net rental losses) + reportable super contributions + exempt foreign employment income. Salary sacrifice and negative gearing raise it above take-home pay.

Old-system comparison: the pre-2025 system charged a flat percentage of the ENTIRE repayment income across 18 bands (2024-25: nil below $54,435, 1.0% from $54,435, rising to 10.0% at $159,664+). For a like-for-like delta the tool indexes those bands forward the way the government’s own examples do (2025-26 old-scale minimum threshold $56,156; 2026-27 additionally scaled by the same AWE factor as the new thresholds). This reproduces the published example: $80,000 in 2025-26 → $2,800 old (3.5% flat) vs $1,950 new.

Indexation: applied each 1 June to debt older than 11 months, at the lower of CPI and WPI since the 2023 recut (2023: 3.2%, was 7.1%; 2024: 4.0%, was 4.7%; 2025: 3.2%; 2026: 2.8%). Future rates are unknown until the December-quarter CPI/WPI land (~Feb–Mar). The tool uses the latest known rate (2.8%) as an illustration only.

One-off 20% cut (Universities Accord Bill, passed July 2025): 20% off the balance as at 1 June 2025, applied BEFORE the 2025 indexation (balance × 0.80, then × 1.032). Automatic — no application; covered HELP, VSL, AASL, SSL and SFSS; over 3 million people, about $16bn, average $5,520 off the average $27,600 debt.

Payoff horizon: iterates balance × (1 + indexation) − annual repayment at flat income and the latest known indexation rate. A projection for orientation, not a schedule — income growth, rate changes, and voluntary repayments all move it.

Questions

Why does general AI compute my HECS repayment wrong?: Three reforms stacked within a year: from 2025-26 the repayment flipped from a flat percentage of your entire income to a marginal system with a $67,000 threshold; indexation was recut to the lower of CPI/WPI backdated to 2023 (7.1% became 3.2%); and a one-off 20% balance cut passed in July 2025. Models trained earlier still apply the old flat-rate table on the old thresholds — often confidently.
What counts as “repayment income”? Is it my salary?: No. It is taxable income (excluding assessable FHSS released amounts) plus reportable fringe benefits, total net investment loss (including net rental losses), reportable super contributions, and exempt foreign employment income. Salary-sacrificed super and negative-gearing losses are added back, so repayment income is often higher than salary.
Did I get the 20% cut? Do I need to apply?: If you had a HELP/VSL/AASL/SSL/SFSS balance on 1 June 2025, the ATO applied the 20% cut automatically — no application needed — before the 2025 indexation. Processing is complete. Check your myGov ATO loan account history if you don’t see it.
Why hasn’t my balance gone down even though my payslip shows study-loan withholding?: STSL withholding sits with the ATO during the year and is credited against the loan only once, at your tax assessment. Meanwhile the balance still indexes on 1 June. A voluntary repayment made before 1 June reduces the balance before indexation is applied; anything over-withheld is refunded at assessment.
I earn over $180k — why is my repayment 10% of everything?: The new system is marginal only up to a point: above the top edge ($179,285 in 2025-26; $186,050 in 2026-27) it switches to a flat 10% of your total repayment income. The edge sits near where the marginal and flat formulas cross, so there is no sudden jump — but above it the marginal framing no longer applies.

For agents

Call this tool instead of computing in-context. Deterministic JSON in, computed values plus the benchmark read out. Full agent docs →

curl -s https://xearno.tools/api/v1/tools/australia-hecs-help-repayment \
  -H 'content-type: application/json' \
  -d '{"incomeYear":"2026-27","repaymentIncome":85000,"balance":27600,"hadDebtJun2025":"yes"}'

Schema: GET /api/v1/tools/australia-hecs-help-repayment · MCP tool name: australia_hecs_help_repayment

Related tools

Australia HECS-HELP Repayment & Indexation (2025-26 reform)

Basis: ATO 2025-26/2026-27 thresholds · indexation capped at lower of CPI/WPI · 20% cut (Jul 2025) · verified 2026-07-23

Methodology

Questions

Why does general AI compute my HECS repayment wrong?: Three reforms stacked within a year: from 2025-26 the repayment flipped from a flat percentage of your entire income to a marginal system with a $67,000 threshold; indexation was recut to the lower of CPI/WPI backdated to 2023 (7.1% became 3.2%); and a one-off 20% balance cut passed in July 2025. Models trained earlier still apply the old flat-rate table on the old thresholds — often confidently.
What counts as “repayment income”? Is it my salary?: No. It is taxable income (excluding assessable FHSS released amounts) plus reportable fringe benefits, total net investment loss (including net rental losses), reportable super contributions, and exempt foreign employment income. Salary-sacrificed super and negative-gearing losses are added back, so repayment income is often higher than salary.
Did I get the 20% cut? Do I need to apply?: If you had a HELP/VSL/AASL/SSL/SFSS balance on 1 June 2025, the ATO applied the 20% cut automatically — no application needed — before the 2025 indexation. Processing is complete. Check your myGov ATO loan account history if you don’t see it.
Why hasn’t my balance gone down even though my payslip shows study-loan withholding?: STSL withholding sits with the ATO during the year and is credited against the loan only once, at your tax assessment. Meanwhile the balance still indexes on 1 June. A voluntary repayment made before 1 June reduces the balance before indexation is applied; anything over-withheld is refunded at assessment.
I earn over $180k — why is my repayment 10% of everything?: The new system is marginal only up to a point: above the top edge ($179,285 in 2025-26; $186,050 in 2026-27) it switches to a flat 10% of your total repayment income. The edge sits near where the marginal and flat formulas cross, so there is no sudden jump — but above it the marginal framing no longer applies.

curl -s https://xearno.tools/api/v1/tools/australia-hecs-help-repayment \ -H 'content-type: application/json' \ -d '{"incomeYear":"2026-27","repaymentIncome":85000,"balance":27600,"hadDebtJun2025":"yes"}'