Think Your Impairment Assessment Undersold Your Injuries?

Getting an impairment benefit decision back that feels too low is more common than people expect, and it's worth knowing early that a number on a page isn't automatically the final word on what you're owed.

What the assessment is actually measuring

Your impairment benefit is based on a Whole Person Impairment percentage, worked out by a medical assessor against a set of standard criteria. You need at least 11% to qualify for a payment at all, and the amount increases as the percentage climbs. It's meant to reflect the real, permanent impact of your injury on your body or mind.

The trouble is, a single assessment, done at one point in time by one assessor, doesn't always capture that accurately. Conditions evolve. Some effects of an injury, particularly psychological ones, or nerve-related pain that develops slowly, don't fully show up until months after the initial assessment. And assessments based on incomplete medical history will understate things almost by definition, because they're working with less than the full picture of what's actually going on.

When it's actually worth challenging

A few situations are worth paying attention to. If the percentage feels disconnected from what you're actually living with day to day, that's a signal worth taking seriously rather than dismissing. If a condition has worsened, or a new complication has emerged, since the original assessment, that's another. And if you suspect the assessor didn't have your full medical history in front of them, whether that's earlier scans, specialist reports, or ongoing treatment notes, that's a legitimate basis to push back.

None of these are guaranteed to change the outcome. Every case turns on its own medical facts, and a dispute doesn't automatically mean a higher figure. But all of them are legitimate grounds to ask for a second look, and none of them are things you're expected to just accept quietly because a decision has already been made.

How a dispute actually works

If you want to challenge an assessment, there's a defined process for it. It generally starts with an informal review, where the original decision gets looked at again, often alongside any new evidence you've gathered. If that doesn't resolve things, it can move on to VCAT, which independently reviews the decision.

As with most TAC decisions, there's a 12-month window from when you became aware of the decision to lodge that dispute, so this isn't something to leave sitting for a few years while you decide how you feel about it. Missing that window can mean losing the right to challenge the decision at all, regardless of how strong the underlying medical case might be.

The strongest disputes tend to be backed by a fresh, independent medical assessment, one that looks at the injury properly and in full, rather than repeating the original process or simply restating disagreement with the number. Outcomes tend to shift when the evidence behind them is genuinely stronger and more complete, not when someone simply asserts that the first figure felt unfair.

The upside of getting this right

Disputing an assessment doesn't put your other entitlements at risk. Your medical cover, income support, and any potential common law claim all sit separately from your impairment benefit, and challenging one doesn't jeopardise the others. There's little downside to checking the figure is right, and it can matter significantly over the life of a permanent injury if the original assessment didn't reflect the full picture.

If you're unsure whether your situation fits any of this, that uncertainty is normal. Impairment assessments are technical, and it's genuinely hard to judge from the outside whether a figure is defensible or worth challenging. That's exactly the kind of thing worth having properly looked at rather than guessing either way.