A Third-Party Only (TPO) plan is the cheapest and most basic type of car insurance that only covers you for liability against the other party in the event of an accident. Third-Party, Fire & Theft (TPFT) plans cover liability and fire or theft and are more expensive than TPO plans but are around 10% cheaper than comprehensive plans. Both TPO and TPFT plans may be better options for drivers of cars over 10 years old. Comprehensive plans are the most expensive but are recommended for most drivers because they provide a wide breadth of benefits beyond liability and fire/theft such as personal accident, medical and car accessory coverage.