Current ATO GIC Rate for March 2026

Published March 2026 Last updated March 2026

Last reviewed:

Primary tax-year context: Current Australian tax settings

This article is general information only. We maintain pages using primary-source checks and date-based reviews. See editorial policy.

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General information only. This is not tax or financial advice. Consult a registered tax agent for advice specific to your situation.

As at March 2026, the ATO General Interest Charge (GIC) for 1 January 2026 to 31 March 2026 is 10.65% p.a. (daily compounding).

Why this matters

GIC accrues daily on overdue tax amounts. The longer a debt remains unpaid, the larger the compounding effect.

Daily compounding concept

  • annual rate: 10.65%
  • daily rate: annual rate divided by days in year
  • each day, GIC is applied to principal plus previously accrued GIC

Practical actions

  1. Prioritise clearing the highest-rate ATO balances first.
  2. Review payment plans if cash flow is constrained.
  3. Re-check the rate at each quarter boundary.

Use the ATO GIC calculator to estimate month-by-month impact.

Sources

Where to go next

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