In the UK - the amount of compensation you can receive for an auto accident depends on the nature of the back injury you have suffered as described by a medical expert - your solicitor will instruct the medical expert as part of your claim. The is no such thing as an average settlement as for back injuries compensation can be up to approximately £260,000. Please see the related link entitled "motor bike accident" to see examples of how much compensation you can receive for various different RTA injuries including lower back injuries using a motorbike accident as an example.