Glossary
The insurance excess is the amount you pay per claim before the insurer pays anything - and raising it is the cheapest premium cut on the market. The trade only works if the buffer behind the excess exists.
The excess is the amount you pay out of pocket on each claim before the insurer pays anything. A $4,000 storm claim on a policy with a $1,000 excess means the insurer pays $3,000 and you pay the first $1,000. The excess is charged per claim, not per year - two claims in twelve months means two excesses - and the setting is the cheapest premium lever on the market: raise the excess, and the premium falls because the insurer is not funding the small stuff.
The Australian versions differ by product. Car policies add an age excess for drivers under 25 - an extra few hundred dollars per claim on top of the standard. Home and contents policies apply the standard excess per event. Private hospital cover charges an excess per admission, and it is optional on many tiers. The excess is the income protection waiting period's cousin: both are the self-funded slice of the claim, and both are priced by the same trade-off.
The mechanics run on the claim arithmetic. A $6,000 storm claim with a $1,000 excess pays $5,000 from the insurer and $1,000 from you; the same claim on a policy with a $2,000 excess pays $4,000 and $2,000. The premium prices the difference: a $1,800-a-year home and contents policy with a $500 excess drops to roughly $1,400 with a $2,000 excess, because the insurer is no longer funding the small events.
The break-even is the part worth running. The $400 a year of premium saving pays for the extra $1,500 of excess at a claim every 3.75 years: claim more often than that and the higher excess is losing, claim less and it is winning. Most households claim on home and contents less than once a decade, which is why the higher excess wins for almost everyone - and why the buffer behind the excess is the part that makes it safe.
The Australian variants add their own lines. Car policies add an age excess - roughly $400 to $600 per claim for drivers under 25 - on top of the standard excess. Private hospital cover charges an excess per admission, optional on many tiers, which is the same trade at hospital scale. The emergency savings calculator sizes the buffer the excess depends on, and the income protection insurance entry covers the waiting period, which is the same self-funded slice at income scale.
For an Australian reader, the excess is the premium lever that is entirely in your control - no comparison site, no switching, no underwriting: just the setting on the policy you already hold. The trade is real: raise the excess from $500 to $2,000 and the premium falls by roughly a fifth, which is $400 a year compounding in the offset rather than the insurer's revenue. The excess is also the one setting that prices honesty: the insurer assumes you will not claim small, and the premium rewards you when you don't. The catch is the buffer: the excess is self-funded, and the emergency fund entry covers the sizing.
A colleague named Brent (yes, that Brent) claimed a $900 windscreen on a $500-excess policy, then claimed another the following year. The insurer paid $400 twice, lost the no-claim discount both times, and repriced the policy upward at renewal - the two claims cost more than the two windscreens. The highest-leverage thing most Australians can do is raise the excess to the edge of the emergency fund, claim only above it, and let the premium saving compound. The emergency savings calculator sizes the edge.
The $1,800-a-year policy with a $500 excess becomes roughly $1,400 with a $2,000 excess - $400 a year of saving. The extra $1,500 of excess is covered by the saving at a claim every 3.75 years; most households claim less than once a decade, so the higher excess wins. The buffer needs $2,000 behind it, which is the part the emergency fund sizes. The saving is $4,000 over a decade before the claims that never happened.
A $5,000 repair on a policy with a $750 basic excess and a $550 age excess costs a 22-year-old driver $1,300 out of pocket, with the insurer paying $3,700. The age excess is the insurer pricing the driver's risk profile on top of the claim, and it applies per claim on top of the standard setting. Drivers under 25 pay it; drivers over 25 do not, which is why the same policy prices differently across a household.
A Silver hospital policy with a $250-per-admission excess costs roughly $400 a year less than the no-excess version of the same tier. The break-even is 1.6 admissions a year; most people are admitted far less, so the excess version wins. The excess is charged per admission, not per year - two admissions in one year means two excesses - and the income protection gap calculator sizes the household's broader protection gaps.
Mistake: Raising the excess without the buffer behind it.
Why it bites you: The $2,000 excess is self-funded at claim time, and the credit card is not a buffer. The premium saving is real; the claim-time cash flow is the part that bites.
Mistake: Claiming small amounts.
Why it bites you: A $900 windscreen claim pays $400 and costs the no-claim discount, which reprices the policy at renewal. Brent's two claims cost more than the two windscreens. Claim only above the excess and let the discount survive.
Mistake: Reading the excess as annual.
Why it bites you: The excess is per claim, or per admission on hospital covers - two events in one year means two excesses. Budgeting one excess a year underprices the claim-time cost by half. Read the product disclosure statement's claim section, not the summary page.
Mistake: Ignoring the age excess on a young driver.
Why it bites you: Drivers under 25 pay an extra $400 to $600 per claim on top of the standard excess. The household's cheapest policy is the one that prices the youngest driver honestly.
I spent an afternoon repricing every policy I hold at three excess levels so you don't have to, and the premium fell by roughly a fifth on each one for two steps of excess. The arithmetic never moved: most households claim less than once a decade on home and contents. That is why the higher excess wins for almost everyone who holds a buffer.
Brent's two windscreen claims are the case study in the other direction: $400 paid twice, the no-claim discount gone twice, and a repriced policy at renewal. The excess is the one setting that prices the behaviour honestly. Raise it to the edge of the emergency fund, claim only above the line, and let the saving compound where the premium used to live.
It is the amount you pay out of pocket on each claim before the insurer pays anything. It is charged per claim, not per year, and raising it lowers the premium.
Yes, if the emergency fund covers the higher excess - the saving is roughly a fifth of the premium for a few steps. Most households claim less than once a decade, so the trade wins.
You pay the excess twice - it is charged per claim, or per admission on hospital covers. The no-claim discount is also affected, which reprices the policy at renewal.
It is an extra per-claim amount for drivers under 25, typically $400 to $600 on top of the standard excess. It is the insurer pricing the driver's risk profile on top of the claim.
The excess is self-funded at claim time, so the fund needs to cover it. Size the excess to the edge of the buffer - the premium saving compounds and the claim-time cash flow survives.
Disclaimer: This information is general in nature and does not constitute financial or legal advice. Always consult a qualified professional for your specific situation.

Financial Chaos Analyst
Ivy Sinclair-Wren is a Financial Chaos Analyst covering investing, AI, wealth psychology, and the emotional consequences of opening finance apps during market crashes. Based in Melbourne, she specializes in demystifying the Australian tax code and helping users navigate the intersection of spreadsheet logic and human irrationality.