Renting a Car in the US: LDW, SLI, Deposit — Understanding the Insurance Before You Sign

In Europe, a car rental includes solid third-party liability and collision damage cover (CDW) with an excess by default. In the United States, a rental company's base rate often includes only the minimum liability required by the state in question — caps that can be as low as a few tens of thousands of dollars per accident in some states. Yet medical costs and lawsuits after an injury accident quickly run into hundreds of thousands of dollars: that is the real financial risk of an American rental, well ahead of the scratch on the bumper.

The good news: brokers and European booking sites generally sell packages including LDW and supplemental liability at a much gentler price than the counter. The golden rule is therefore simple: compare what is actually included in the offer you book from home, and arrive at the counter knowing precisely what you are going to decline.

Here are the four options the agent will systematically offer, and our verdict for a visitor from Europe.

Most premium credit cards (Visa Premier, Gold Mastercard and above for French cards, and many US-issued cards) include damage/theft cover for rental vehicles: pay for the rental with the card, decline the company's LDW, and you are covered for bodywork, often with no residual deductible. That is the mechanism we detail in our article on credit card rental insurance — along with its strict conditions: rental in the cardholder's name, full payment with the card, maximum durations.

But there is a major blind spot: no credit card covers third-party liability. If you injure someone or damage property with the vehicle, the card will pay nothing — and the legal minimums of many US states are derisory compared with the real cost of an injury accident. Concretely: a credit card can replace the LDW, never the SLI. If your booking does not include supplemental liability (generally $1 million in the packages), take the SLI at the counter, even if it adds ten dollars or so per day.

Is it worth paying more for cover with no deductible at all? Insurance economics offers a useful insight: a study by Alma Cohen and Liran Einav published in 2007 in the American Economic Review, based on more than 100,000 car insurance contracts, shows that many drivers accept disproportionate premiums to reduce a small deductible — a risk-averse behaviour that statistically costs more than it saves (study on Google Scholar: scholar.google.com/scholar?q=Cohen+Einav+Estimating+risk+preferences+from+deductible+choice).

Applied to American rentals, the lesson cuts both ways: no need to stack 'zero worries' options at the counter if your package or card already covers damage — the probability of a minor claim doesn't justify an extra $15 to $30 per day. But this reasoning only holds for small risks: for liability, where a claim can be catastrophic, broad cover (SLI) remains the only rational option.

The American deposit is fairly light compared with other destinations: a pre-authorisation generally between $200 and $500 on top of the estimated rental amount, on a credit card in the main driver's name. Debit cards are sometimes accepted, but with tougher conditions (extra documentation, higher blocked amounts): a real credit card is much better. A European licence is accepted in the vast majority of states for a tourist stay; an International Driving Permit is not mandatory everywhere, but it serves as an official translation in case of a police stop and some rental companies ask for it — check before departure depending on the states on your route.

Two fees often catch people out: the young driver fee for drivers under 25 (generally $25 to $35 per day per driver), and drop-off fees for returning the vehicle in another city — sometimes several hundred dollars on a one-way like Los Angeles–Denver. Finally, check the fuel policy (return full) and mileage: unlimited is the norm, but a few discount offers cap it.

One: book from home an offer whose details explicitly mention LDW (damage with no deductible) and supplemental or extended liability (SLI/ALI, ideally $1 million). Two: at the counter, politely but firmly decline the duplicates — PAI and PEC if your travel insurance covers them, an upgrade you didn't ask for, GPS and toll gadgets if your phone and route don't need them. Three: check the vehicle's condition with photos before leaving the lot, as everywhere.

A correctly sized insurance budget adds roughly $10 to $25 per day to the headline price — that is the true cost of a stress-free rental in the US. Our 'USA on Your Own' guide devotes a full chapter to rental companies, European broker packages and counter traps, airport by airport.