Renting a car in Reykjavik is the classic way to see Iceland, but Icelandic car hire is unusual in one respect: the insurance matters as much as the car, because the landscape does real damage to vehicles. Reykjavik is where most rentals start, and understanding gravel, sand, ash, and the F-road rules before you book will save you money and trouble.
Insurance is the key decision
Basic collision damage waiver and third-party cover are mandatory, but the optional protections are what count in Iceland. Gravel protection is widely recommended, because gravel is everywhere, especially on the roads outside the capital, and a flying stone that cracks a windscreen can cost more than the equivalent of a thousand US dollars to replace. Sand and ash protection matters too, particularly in the volcanic-ash season broadly from February to April, since a sandstorm can strip paint and lead to a repair bill in the thousands. For a Reykjavik base with day trips, collision, third-party, and gravel cover is a sensible minimum. Comparison sites such as DiscoverCars help you check prices and what each policy includes before you book.
F-roads and vehicle rules
Iceland's mountain interior is reached by F-roads, and there is a firm legal rule: only a four-wheel-drive with high clearance may drive them. A two-wheel-drive car is prohibited by law on F-roads, and if you take one there, your insurance will not cover the damage. So if your plans include the Highlands or river crossings, you must rent a suitable four-wheel-drive and buy the fuller protection package. For the Golden Circle, the south coast, and Reykjavik itself, a standard car is fine in summer.
Driving conditions and booking
Icelandic weather changes fast, single-lane bridges and blind rises are common, and off-road driving is illegal and heavily fined to protect the fragile landscape. Fill up when you can, as stations are sparse outside towns. Book ahead, especially in summer, read exactly what the insurance covers and the excess, and match the vehicle and cover to where you actually plan to drive.