Liability Explained — Who's at Fault, Split Decisions & 50/50 Outcomes

How liability is decided

The starting point is the evidence: photos, dashcam, witness statements, damage patterns, police reports. Insurers apply:

• The Highway Code
• The Road Traffic Act 1988
• Established case law and industry precedent
• The ABI Fault Code system used between insurers

Both insurers' engineers and claims handlers reach a view; they then negotiate. Most cases settle without going to court.

Common scenarios and default fault positions

Rear-end collision

The following driver is almost always at fault — they should have kept a safe stopping distance. Exceptions: sudden reverse, brake-check fraud.

Pulling out of a junction

The driver on the minor road usually bears fault; the priority driver is only partly liable if speeding, illegally overtaking or driving without lights.

Lane changes / merging

The lane-changing vehicle owes the duty of care. Simultaneous lane changes trigger a 50/50 default.

Roundabouts

Priority is to traffic already on the roundabout. Vehicles entering while another is exiting from an inside lane can create split liability.

Reversing into a moving vehicle

The reversing driver is almost always at fault.

Car parks

Reversing, entering unmarked lanes, or pulling out of spaces usually attracts fault. Photograph everything — car parks are the most disputed scenarios.

Roadworks and traffic lights

The driver going through a red is at fault; if lights are ambiguous or temporary, evidence matters.

Split liability

A split-liability outcome (60/40, 70/30, 50/50) means both drivers contributed to the accident. You recover the percentage of your losses attributable to the other driver. For example, on a 70/30 in your favour, you recover 70% of your vehicle damage, hire and injury losses.

Some insurers offer split liability early to close a case. Consider it carefully — evidence often supports a better position with more time.

Challenging a fault decision

1. Ask for the reasons in writing.
2. Provide your evidence: dashcam, photos, sketches, witness statements.
3. Cite Highway Code paragraphs where relevant.
4. Insist on referral to their engineering team.
5. Escalate to the Financial Ombudsman Service if you remain unhappy with your own insurer's handling.
6. If pursuing the other driver directly, litigation is the fallback — but rarely needed.

Uninsured or untraced drivers

If the at-fault driver is uninsured or untraced, liability is investigated through the Motor Insurers' Bureau — see our hit-and-run guide.

Common myths

• 'Both cars moved so it's automatically 50/50.' Not true — liability follows fault, not motion.
• 'The police decide fault.' No — the police prosecute road offences; insurers decide civil liability separately.
• 'The bigger vehicle is always more at fault.' Not true — size doesn't create liability.

Talking to VIP Claims is free and puts you under no obligation. We are an independent, UK-based accident management company — not an insurer. If your accident wasn't your fault, we can arrange a like-for-like replacement vehicle, manage repairs at an approved bodyshop, and recover all costs from the at-fault driver's insurer, protecting your no-claims bonus and keeping your excess in your pocket. Speak to a specialist or start your claim online.