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Make Every Quote Cover the Same Risk
Two insurance premiums are comparable only when the contracts transfer the same risks. A lower number may reflect a higher excess, fewer permitted drivers, a different workshop arrangement, weaker own-car cover, or missing optional benefits.
Normalise the contracts first. Then compare the annual premium and the cash you would retain under the same realistic loss.
Working rule
If one row in the comparison is unknown, the cheapest quote has not yet been identified. Ask the insurer or intermediary to answer in writing.
Quote-normalisation worksheet
| Contract field | Quote A | Quote B | What to verify |
|---|---|---|---|
| Coverage type | _____ | _____ | Comprehensive, third party fire and theft, or third party |
| Own accidental damage | _____ | _____ | Included, excluded, limits, and valuation basis |
| Permitted drivers and use | _____ | _____ | Every actual driver, age, experience, occupation, and use |
| Basic excess | S$_____ | S$_____ | When it applies |
| Additional excesses | S$_____ | S$_____ | Driver, age, experience, workshop, theft, flood, or other additions |
| Workshop and parts terms | _____ | _____ | Authorised or chosen workshop, parts basis, penalties or additions |
| Optional benefits | _____ | _____ | Windscreen, transport, personal accident, and other quoted items |
| Finance requirement | _____ | _____ | Written lender requirement and whether the quote meets it |
| Annual premium after comparable discounts | S$_____ | S$_____ | Same payment basis, NCD, and declared facts |
The GIA consumer guide warns that lower premiums can carry restrictions involving drivers, workshops, and parts. Treat each restriction as a contract difference, not a footnote.
Worked premium-versus-contract example
Assume two hypothetical comprehensive quotes have the following terms for the same car and use. Policy A costs S$1,050 a year, has a S$1,500 basic excess, and adds S$2,500 for the tested unnamed backup driver. Policy B costs S$1,380 a year, has a S$600 basic excess, and adds S$500 for that driver.
| Measure | Policy A | Policy B |
|---|---|---|
| Annual premium | S$1,050 | S$1,380 |
| Three-year premium | S$3,150 | S$4,140 |
| Premium difference over three years | Policy A saves S$990 | |
| Total excess for tested backup-driver claim | S$1,500 + S$2,500 = S$4,000 | S$600 + S$500 = S$1,100 |
| Difference in retained claim cash | Policy A retains S$2,900 more | |
One applicable backup-driver claim creates a S$2,900 excess difference, which is larger than the S$990 premium saving over three years. Policy A can still be rational if that driver will never use the car and every other term fits. The calculation shows what the lower premium asks the household to retain.
These policies and prices are hypothetical. Actual coverage, excesses, underwriting, claim outcomes, and renewal premiums depend on the insurer’s contract and accepted facts.
Compare the same scenarios
For every quote, calculate the household cash exposure in at least these cases:
- The regular driver has an own-damage claim.
- The youngest or least experienced real driver has the same claim.
- The car is stolen or damaged by fire.
- The car is a total loss while finance remains outstanding.
- You choose a workshop outside the quoted arrangement.
If a scenario is excluded, write the full loss you would retain rather than entering zero. Check what each coverage type transfers, calculate excess trade-offs, and verify every real driver.
Build the quote-acceptance file
- The final quotation with its validity period and premium breakdown
- Your proposal answers and declarations
- The certificate, schedule, full policy wording, and endorsements
- Written answers about drivers, excess stacking, use, workshops, and parts
- The lender’s insurance requirement, if the car is financed
- Proof of payment and the cover start date and time
Recheck the issued documents against the accepted quote. Report errors immediately and keep the corrected endorsement.
FAQ
How do I compare car-insurance quotes fairly?
Align the coverage type, drivers, uses, excesses, workshops, parts terms, optional benefits, and finance requirements. Then compare the premium and the cash retained in the same claim scenarios.
Is the lowest car-insurance premium the cheapest policy?
Not necessarily. A lower premium can carry a higher applicable excess, narrower driver cover, different repair terms, or more retained own-car risk. Compare the complete contract.
Should I compare only the basic excess?
No. Add every excess that can apply to each real driver and event, and ask whether they are cumulative.
What records should I keep after buying car insurance?
Keep the accepted quotation, proposal answers, payment record, certificate, schedule, policy wording, endorsements, and written clarifications from the insurer.
Sources
- General Insurance Association of Singapore — Motor Insurance Consumer Guide
- Land Transport Authority — Car insurance
Last updated: 22 Sep 2026 · Editorial Policy · Advertising Disclosure · Corrections