Nobody sends a notice when relief ends. Petrol excise jumped 17.1 cents overnight.

On Sunday 2 August, the excise on petrol was 36.6 cents a litre. On Monday 3 August it was 53.7 cents. That is 17.1 cents more on every litre you have bought since, and nobody wrote to tell you.

Nothing was announced because there was nothing to announce. A price rise letter arrives when a business puts its prices up. This was the opposite: a temporary discount ending on exactly the schedule it was always going to end on, plus the twice yearly indexation that happened to land on the same date. Two entirely predictable events, published months in advance, and almost nobody had either of them in a budget.

That is the part worth sitting with. Not the petrol. The fact that a recurring household cost moved by seventeen cents a litre and the only place it turned up was the bank statement.

What actually happened at the bowser

Fuel excise is a flat tax per litre, not a percentage. It does not rise and fall with the pump price, which is why it is invisible: the number on the sign moves for a dozen reasons and this is only one of them.

The sequence ran like this. Between 1 April and 30 June 2026, excise was cut from 52.6 cents to 20.6 cents a litre. From 1 July it was extended at roughly half strength, at 36.6 cents. That extension expired on 2 August. From 3 August the rate went back to full, and the regular August indexation added about 1.1 cents on top, landing at 53.7 cents.

So the jump you absorbed was 17.1 cents a litre: 16 cents of relief ending, 1.1 cents of indexation.

Put a number on it. On a 55 litre tank, 17.1 cents a litre is $9.41 a fill. Fill up once a week and that is about $489 a year. Two cars in the household and it is closer to $980. None of that is a spending decision. It is the same driving, the same car, the same commute, costing more.

The rebate that ended in December and is still landing

The federal Energy Bill Relief Fund finished on 31 December 2025 and was not extended into 2026. In its final stretch it was arriving as an automatic credit of $75 a quarter on household electricity bills.

Which means a household that was getting it is now paying $75 more a quarter, about $300 a year, for exactly the same electricity. Nothing was used differently. A line item on the bill simply stopped appearing.

This one ended eight months ago and plenty of households still have not clocked it, for the same reason as the excise: the credit was automatic, so its absence is automatic too. There is no moment where you decide.

Why "inflation is falling" does not feel like anything

The ABS monthly CPI indicator for July, released on 26 August, put annual inflation at 3.5%, down from 3.8% in June. Housing was the largest contributor at 5.0%. Automotive fuel rose 7.5% in the month alone, its first rise after three months of falls.

Here is the bit that gets lost. Inflation falling from 3.8% to 3.5% does not mean anything got cheaper. It means prices are still climbing, slightly less steeply. Things cost 3.5% more than they did a year ago, on top of what they cost after the year before that. A falling inflation rate is a gentler slope, not a descent.

And the number the RBA actually steers by, the trimmed mean, sat at 3.6% and did not move at all. That is the second reading in a row it has refused to budge. It is why the cash rate is still 4.35%, why the August decision was a hold rather than a cut, and why a further hike has not been taken off the table ahead of the next decision on 29 September.

What is actually in your control

Let us be honest about the boundary. You cannot budget your way out of an excise rate. You did not vote on the rebate ending, and the cash rate is not interested in your spreadsheet. Discipline does not repeal a tax.

What it buys you is narrower and more useful: the difference between finding out in the statement and knowing in advance. Every cost in this post was published before it happened. All of it was knowable. The gap was not information, it was attention.

So here is the audit. It takes about an hour and it is not enjoyable.

1. Read the last 90 days line by line. Not the summary, not the categories, not your memory of it. The actual transactions. Almost everyone finds something they had forgotten they were paying for, and the ones who do not find anything have earned the reassurance.

2. Count every recurring cost annually. A subscription at $22 a month is $264 a year. Monthly framing was designed to make the number feel small, and it works. Annual framing is how you would decide if you were deciding today.

3. Sort by whether you actively chose it in the last twelve months. Anything you have not re-chosen is running on default, and defaults reprice quietly. Insurance renewals, energy plans past their benefit period, and the mortgage rate you negotiated in 2022 are the three usual suspects.

4. Write down the date each big cost can next change. Your electricity plan has a benefit period end date. Your insurance has a renewal. Your fixed rate has an expiry. Your variable rate can move eight times a year on published dates. Put them in a calendar. A cost with a known date is a plan; a cost without one is a surprise.

5. Work out your break point. Not "can I afford this today", but "at what rate, or what price, does this stop working". If you know that number, the next RBA decision is information. If you do not, it is anxiety.

The uncomfortable part

Discipline gets sold as a character trait, which is both flattering and useless. It is closer to a filing system. The households that handled 3 August calmly were not more virtuous than the ones that did not; they had a number written down somewhere and a habit of checking it.

And there is a version of this that no amount of scrutiny fixes. For some households there is no slack left in the budget, and the honest answer to a 17.1 cent excise rise is that it comes out of something that mattered. Finding that out in August is still better than finding it out in December. It is more time to do something about it, and it is the difference between a decision and a default.

How Funance helps

• The Bills and Subscriptions view leads with the annual number rather than the monthly one, and ranks by it, so the expensive habits sort to the top.
• The Scenarios tab (Pro) models rates up and down before 29 September, so the next decision is a number you have already seen.
• The Advice tab flags it when your mortgage rate is materially above market, which is the refinance conversation most people never quite start.

Funance Pro is $9.90 a month or $79 a year, with a 14 day trial and no card up front.

This post is general information about published tax rates, a government rebate program and public ABS data. It is not personal financial advice, and I am not a licensed adviser. Excise rates are published by the ATO and change twice a year; the CPI figures are from the ABS monthly indicator. For your own situation, talk to a licensed financial adviser.