What affects insurance premiums

Direct answer

What affects insurance premiums in Australia? The price is the issuer’s charge for keeping a conditional promise. It moves with the risk you present (people, place, object, history), the product you configure (excess, limit, extras, waiting periods, definitions), and costs the issuer cannot show you as a simple slider (claims on the book, reinsurance, repair and rebuild inflation). A renewal letter is not a morality play. A comparison tile is not a market index.

This page lists families of inputs. It does not publish a pricing engine, a typical comprehensive premium, or a cheapest-insurer rank. Those would violate the rule in our methodology.

General information only. Eligibility and rating factors sit in the PDS, the application, and the underwriting the issuer actually applies after you click.

The four buckets

If two quotes differ in any bucket, you are not looking at two prices for one product. You are looking at two products. How to compare is the method; the quotes checklist is the sheet.

Who you are — and who else is on the risk

Age and experience are classic motor and some lifestyle inputs. A younger or newly licensed driver can change both the premium and the excess stack. Omitting that person to win a price is how claims fail.

Occupation and employment status appear on income protection, some life products, and some business covers. A change of job is a mid-term event, not a secret.

Health-related questions appear where the product is medical or living-benefits. Guessing “no” is not a discount code. The duty to take reasonable care not to make a misrepresentation applies.

Household composition changes contents and landlord risk. A share-house is not always the same as a family home in the questions you will be asked.

We will not say which occupation or age band “usually” pays more. Those relativities are issuer-specific and dated.

Where the risk sits, and what the object is

Postcode is a blunt instrument for theft, hail, flood, bushfire and repair-network costs. Two streets can differ. A quote that only asks a postcode is already approximate.

Parking (garage, street, work car park) is a motor question. Construction type, roof, security, occupancy and renovations are property questions. Destination, length of trip and activities are travel questions. Breed, age and postcode appear on many pet forms.

Sum insured and valuation basis are levers that look like discounts when they are actually thinner limits. A lower building sum usually lowers the premium and raises underinsurance risk. Market value versus agreed value on a car changes the total-loss story. See car and home. Hospital and extras prices move with clinical categories, extras limits and recognised history — the health hub is the place for those rows.

Use of the object is underwriting. Private versus business, rideshare, tools on board, landlord versus owner-occupier, working from home with clients on site — these change the product. A cheaper private-use premium on a car that earns money is not a comparison win.

History — claims, offences, prior insurance

Prior claims can change premium, excess, or eligibility. So can the absence of prior insurance on some products. Driving records and licence conditions matter for motor. Medical history matters for health-adjacent and life products.

A claim-free year is one input. It does not freeze a renewal when repair costs or the issuer’s book moved. Ask the issuer which factors they will disclose. Do not expect a public formula.

Switching to escape a loading can work only if the new application is honest and the new wording is like-for-like. Switching is about gaps, not about hiding a file.

Product settings you can move on purpose

These are the levers people treat as “discounts” when they are really different cover:

• Excess. Higher first-loss, usually lower premium, only if you can fund the stack.
• Optional extras. Windscreen, rental car, portable valuables, pregnancy on travel — each is a mini-product.
• Waiting periods. Especially income protection and some health or pet choices. See waiting periods.
• Flood or other event options. Adding or removing an event changes the promise. See exclusions.
• Payment frequency. Instalments can include a funding cost. Annual versus monthly is a contract question, not a vibe.
• Multi-policy or loyalty settings. A bundle discount is a price change that can hide a weak wording. See bundling.

The honest experiment remains: two quotes, same path if possible, one lever moved. If the cheaper quote also dropped a benefit, you did not isolate the lever.

Costs you cannot slider

Issuers buy reinsurance. They pay smash repairers, builders and medical providers. Catastrophe years move books. Regulation and taxes can appear on a schedule as separate lines — stamp duty and levies are jurisdiction issues, not a comparison-site invention.

None of that entitles anyone to publish “average Australian comprehensive premium this month” on a blog and call it research. We will not.

Comparison sites, including future tiles on this domain, see a subset of questions. Underwriting after the click can change the price or decline the application. A tile is a start, not a bind.

Renewals — read the schedule, not only the total

When a renewal arrives:

1. Open last year’s schedule and this year’s. Diff the people, address, sums, excesses and extras.
2. Ask whether a rebuild or contents figure was indexed — and whether the index matches a real estimate.
3. Decide whether the product still pays the event you named.
4. If you shop, clone the current mechanics first. A lower new-business price on a thinner product is not a saving.

Loyalty is not automatically expensive. Shopping is not automatically wise. Both are hypotheses you test with documents.

What does not belong in a premium conversation

• A neighbour’s price (different object, different answers, different day).
• A forum thread from another year.
• A star rating with no dated sample.
• A “save $X” banner without a configuration.

MoneySmart is the consumer-language home for insurance education. AFCA is for disputes after internal processes, not for negotiating a renewal discount.

Lowering a premium without lying to the form

Legitimate paths, still general:

• Remove an extra you would not claim.
• Correct a sum insured that was guessed too high or too low (low is not a savings strategy).
• Pay in a way that avoids a funding fee if that fee exists on your contract.
• Obtain a like-for-like quote and switch only when the new policy is on risk.
• Change a risk you actually control (who drives, how the car is parked, a security device the PDS recognises) — then tell the insurer.

Illegitimate paths: omit a driver, call business use private, invent a claim-free history, understate a rebuild to win a slider. Those paths move the price by moving the truth.

Taxes, levies and the lines under the premium

A schedule can show stamp duty, fire or emergency services levies, and GST as separate amounts or as part of a total. Those lines are jurisdiction and product issues. They are not a comparison-site invention and they are not a discount you negotiate in a chat window.

When you compare two quotes, compare the total you will pay for the same payment frequency, and note whether a funding fee sits in another document. A “lower premium” that becomes a higher total after instalment loading is not lower.

We will not publish a table of current state levies. Those instruments change. Read the quote breakdown you were given.

Comparison sites see a subset

A postcode, an age band and a sum insured are not a full underwriting file. Some prices on tiles change after a driving or medical question. Some applications are referred. Some are declined. That is why this site refuses to treat a tile as a bind, and why Compare offers is documented as a stub rather than as a market.

If a path cannot ask the question that would change the price (a young driver, a renovation, a destination), write “incomplete” on the sheet. Incomplete is not cheap.

What this site will never do with premiums

• Invent a live or typical price for any postcode.
• Rank issuers by cheapness.
• Promise that a partner path shows the whole market.
• Treat Compare offers as anything but a stub.

If a paragraph on this domain ever sounds like a price, treat it as a bug and tell us.

Price is the last column. Excess vs premium is the first mechanic most households meet. The disclaimer is the legal restatement: general information, PDS and eligibility first.