How do I dispute an Optus billing issue?
How to challenge an Optus billing dispute, including the TCP Code and TIO complaint pathways.
Regulator
TIO
Key legislation
Telecommunications Consumer Protections Code (TCP Code)
Dispute path
Letter first, deadline tracked. If they go quiet, escalation to TIO is prepped and ready.
Optus billing disputes usually involve charges that appear after a contract change, a plan update, or a service issue. The Telecommunications Consumer Protections Code sets the baseline for how telcos must treat billing complaints and communicate changes to customers.
Ask Optus for the bill breakdown, the account history, and the reason for the charge. A troubleshooting complaint is much stronger when you can separate the disputed charge from the service issue itself and show what happened at each step.
If the matter remains unresolved, TIO can review the complaint. Keep your plan details, invoices, and messages because the law and the complaint process will turn on the facts you can prove.
Frequently asked questions
What evidence should I keep for an Optus billing dispute?
Keep every bill showing the disputed charge, your plan terms or contract, screenshots of your account and usage, and any emails, messages or call notes where Optus explained the charge. If the dispute followed a plan change or contract update, keep a copy of what you actually agreed to as well, since that’s usually where these disputes turn.
Optus charged me for a service I never used, what can I do?
Ask Optus directly to explain why the charge was applied to your account and to point to the specific plan term or usage record that supports it. If Optus can’t produce a clear explanation, or the charge doesn’t match your actual usage or plan, that’s a solid basis to request the charge be reviewed and reversed.
When should I escalate an unresolved Optus billing complaint to the TIO?
Once you’ve raised the issue with Optus in writing and it hasn’t fixed the problem, given an inadequate response, or taken an unreasonable amount of time to act, the Telecommunications Industry Ombudsman is the right next step. It’s free for consumers, and Optus faces real cost and case-handling obligations for every complaint that reaches the TIO.
Does the TCP Code cover Optus billing disputes?
Yes. The Telecommunications Consumer Protections Code is the central rulebook for how telcos, including Optus, must bill accurately, disclose charges and changes, and handle customer complaints. Referencing the Code by name in a written complaint signals that you understand the standard Optus is actually held to, which often gets a more serious response than a general complaint.
Can I ask Optus to correct or reverse a disputed charge?
Yes. A written complaint can specifically request that the charge be reviewed and, where the evidence supports it, corrected or reversed entirely. Be specific about the amount, the billing period, and why you believe the charge is wrong, rather than raising a general complaint about the bill, since a specific request is easier for Optus to action quickly.
Does my Optus contract term affect a billing dispute?
Yes, quite a lot. The terms you actually agreed to when you signed up or last changed your plan determine what Optus is allowed to charge you and under what conditions. If a charge doesn’t align with what your contract says, or appeared after an unannounced plan change, that mismatch is often the strongest part of the complaint.
What if Optus just ignores my letter?
Silence is not a dead end, it is a deadline breach. Optus is expected to respond to a formal complaint within 30 days. Build your letter with us and we track that deadline for you: a countdown check-in two weeks in, and if they miss the deadline, your escalation to the TIO (Telecommunications Industry Ombudsman) arrives pre-filled and ready to lodge. Escalating is free.
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Optus had 3,208 TIO complaints in Q3 FY2025-26 →screwtheman.com is not a law firm and does not provide legal advice. The content on this page is for general information on consumer rights, legislation, and dispute pathways. For complex legal matters, consult a qualified lawyer or the relevant regulator.