HECS indexation 2026 explained: 2.80% on 1 June

Every 1 June, the ATO indexes outstanding HECS-HELP balances. The 2026 indexation rate is 2.80%, applied to the balance you hold at midnight on 31 May.

That's the lowest indexation rate since 2021. Three things to understand:

The formula: lower of CPI or WPI

From 1 June 2023 onwards, indexation uses the lower of the Consumer Price Index (CPI) or the Wage Price Index (WPI), measured over the same quarterly methodology the ATO has always used. This was legislated in November 2024 and backdated to the 2023 and 2024 indexation events.

For 2026, the relevant March-quarter measurements gave: CPI 2.8%, WPI ~3.2% (early estimates). The lower-of rule picks CPI, so 2.80% applies.

Why this is lower than recent years

Recent indexation rates:

• 1 June 2020: 1.8%
• 1 June 2021: 0.6%
• 1 June 2022: 3.9%
• 1 June 2023: 7.1% → recalculated to 3.2% after Nov 2024 law
• 1 June 2024: 4.7% → recalculated to 4.0% after Nov 2024 law
• 1 June 2025: 3.2%
• 1 June 2026: 2.80%

Inflation has cooled, wage growth has softened, and the lower-of cap puts a hard ceiling on how high indexation can go. The post-2024 regime fundamentally changed the HECS calculus: pre-2023 you faced potential 7%+ indexation in a high-inflation year; from 2023 onwards, indexation can't exceed wage growth.

What this means for your decision

At 2.80%, voluntary repayments are rarely the best use of cash. A 5.00–5.50% high-interest savings account, even after tax, generally beats it.

Run your specific numbers — balance, income, and savings rate together determine the answer.

If you already paid voluntarily this cycle

Paid before 26 May 2026? Your balance was reduced before the 2.80% was applied. You saved 2.80% × the amount you paid. Whether that was the optimal move depends on what else you could have done with the money — the calculator backs into that retrospectively too.