Vehicle Insurance: Full Cover or Third Party?
One is legally required and cheap. The other is expensive and pays when the car you damage is your own. How to work out which your vehicle actually justifies.
Third-party insurance is legally required and cheap. Full cover is optional and expensive. The decision between them is not really about risk appetite — it is a calculation, and it has a fairly clear answer once you run it.
A note on figures. Premiums, excesses and available benefits vary by insurer, vehicle and driver, and change with market conditions. This article covers how the products differ and how to decide between them. Get written quotations for your specific vehicle rather than relying on general figures.
What each one covers
Third-party covers damage and injury you cause to other people and their property. It covers nothing at all for your own vehicle. If you damage your car in a single-vehicle accident, third-party cover pays you nothing.
Third-party, fire and theft adds those two specific perils for your own vehicle. It is a modest step up in price and closes the two gaps most likely to write a car off entirely without another vehicle being involved.
Comprehensive, usually called full cover here, adds damage to your own vehicle regardless of who is at fault, plus the perils above. It is substantially more expensive.
The calculation
The question is not "am I a careful driver?" — everyone believes they are, and it makes little difference to whether someone reverses into you.
The question is: could you replace this vehicle tomorrow, out of your own money, without it being a disaster?
If yes, third-party is a rational choice. You are self-insuring a loss you can absorb, and over enough years you will very likely come out ahead of the premiums you did not pay.
If no — if losing the vehicle would mean not being able to get to work, or taking on debt — then full cover is not a luxury. You are not buying repairs; you are buying protection against an outcome you cannot survive.
The other factor: is the vehicle worth insuring?
Comprehensive premiums scale with the vehicle's value, but so does the value of what you are protecting. There comes a point where the arithmetic turns.
On an older, lower-value vehicle, an annual comprehensive premium can be a large fraction of what the vehicle is worth. Pay it for three or four years and you have spent close to the vehicle's value on insuring it. Below a certain value, third-party plus a repair fund of your own is usually the better trade.
On a newer or higher-value vehicle, the premium is a small fraction of the value at risk, and comprehensive is straightforwardly sensible.
There is no universal cut-off, but the shape of the decision is consistent: the higher the vehicle's value relative to the premium, the stronger the case for full cover.
When you have no choice
If the vehicle is under a lease, the finance company will almost certainly require comprehensive cover for the full term, and may require it through a nominated insurer. This is not negotiable — the vehicle is their security. Check whether you may use your own insurer, because over a five-year lease the difference is real money. See our guide to vehicle leasing for the other clauses worth reading closely.
The details that decide whether a policy is any good
Two comprehensive policies at the same price can be very different products. Ask about:
- The excess. What you pay on each claim. A low premium with a high excess may be worse than the reverse, depending on how you actually claim.
- No-claim bonus. How it accrues, and what happens to it after a claim. A large accumulated bonus is worth protecting, and losing it makes a small claim not worth making.
- Agreed value or market value. Market value means the insurer decides what your vehicle was worth at the time of loss. Agreed value fixes it in advance. For an unusual or well-kept vehicle, agreed value avoids an unpleasant conversation at the worst moment.
- Whether repairs are at an authorised workshop, and whether you may choose the garage.
- Genuine or aftermarket parts in a repair.
- Named driver restrictions. Cheaper policies restrict who may drive. If someone else regularly drives your vehicle, check they are covered.
- Flood cover. Not always included by default, and worth having in a country that floods. Ask explicitly.
- Natural perils and civil disturbance, which are often separate extensions rather than part of the base cover.
Reducing what you pay
- Get several quotations. The spread between insurers for identical cover is wider than most people expect.
- Take a higher excess if you can comfortably fund it. It reduces the premium meaningfully.
- Protect your no-claim bonus, and think twice before making a small claim that costs you it.
- Pay annually where possible — instalment arrangements usually carry a charge.
- Ask about security discounts for immobilisers, tracking devices and secure parking.
- Review annually. As a vehicle depreciates, the case for comprehensive weakens. Reassess rather than renewing automatically.
Claiming without losing
At the scene: photograph everything before anything is moved, including the wider scene and the other vehicle's number plate. Exchange details. Do not agree fault at the roadside — you may not know what happened, and it is not your call to make.
Notify your insurer promptly. Policies specify a window for notification, and missing it can jeopardise the claim regardless of merit.
Before claiming at all, do the arithmetic. If the damage is close to your excess, and claiming costs you a no-claim bonus you have built over years, paying for the repair yourself is frequently cheaper.
Questions people ask
I have third-party and someone hit me. What now?
You claim against their insurer, not yours. This works when the other party is insured, identified and accepts responsibility — and is exactly why comprehensive exists, because those three conditions do not always hold.
Does my policy cover another person driving my vehicle?
Depends on the policy. Named-driver policies are cheaper and more restrictive. Check before lending your car, not after.
Is flood damage covered?
Often an extension rather than standard. Given how routinely parts of Sri Lanka flood, ask specifically and consider adding it.
Should I insure a very old vehicle comprehensively?
Rarely worth it. Once the annual premium approaches a meaningful share of the vehicle's value, third-party plus your own repair fund is usually the better trade.
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