What should you know before renting a car in another country? More than you’d think — international car rental has traps at every stage: license requirements, insurance confusion, unfamiliar road rules, toll systems, fuel types, and return gotchas. Get these right and driving abroad is one of travel’s great freedoms (the Amalfi Coast, the Scottish Highlands, New Zealand’s South Island — all demand a car). Get them wrong and it’s an expensive headache. Here’s everything, in order.

Before you book: licenses and eligibility

  • International Driving Permit (IDP). Required or strongly recommended in 150+ countries — it’s a translation of your license, not a license itself. Get it from AAA ($20, 10 minutes, no test) before you leave. Some countries (Italy, Spain, Greece, Japan) legally require it; rental agencies may not ask, but police will. Carry it WITH your regular license — alone, it’s worthless.
  • Age restrictions. Many countries rent only to 21+ or 25+, with young-driver surcharges under 25 (often €20–35/day — brutal). Some countries cap at 70–75 for rentals. Check before planning around a car.
  • License tenure. Several countries require 1–2 years of licensed driving. New drivers, take note.
  • Credit card, not debit. Rental agencies hold $500–2,000+ as a deposit — on a credit card. Debit cards are often refused outright. Bring a card with sufficient limit.

Booking: getting the right car at the right price

  • Book ahead, compare broadly. Aggregators (Discover Cars, Rentalcars.com, Auto Europe) for comparison, then check the company’s direct site. Book the smallest car that fits — European/Japanese roads and parking punish big cars, and smaller = cheaper fuel.
  • Manual vs. automatic: ASK. Outside North America, manual (“stick shift”) is the default and automatics cost 30–60% more — and sell out. If you can’t drive manual, book the automatic early and confirm. Showing up expecting an automatic without reserving one is a classic disaster.
  • Understand the insurance alphabet. CDW/LDW (collision/loss damage waiver — covers the car), SLI/ALI (supplemental liability — covers others), PAI (personal accident). The rental desk will hard-sell all of it. Know before you go: many premium credit cards include primary CDW abroad (Chase Sapphire, Amex) — check yours and bring proof. What’s NOT covered: tires, windshield, undercarriage, roof (read exclusions — these are the common damage points).
  • Photograph everything at pickup. Every scratch, dent, scuff — timestamped photos and video, including the windshield and wheels. This 5-minute ritual has saved travelers thousands in disputed damage claims.

Driving rules that differ (the dangerous assumptions)

  • Which side? UK, Ireland, Japan, Australia, New Zealand, much of southern Africa drive on the left. The first roundabout is the danger zone — say “stay left” out loud until it’s automatic. Jet lag + wrong side = maximum risk on day one; consider not driving the arrival day.
  • Speed limits and enforcement. Limits are lower and enforcement is stricter in much of Europe — speed cameras everywhere, fines mailed to the rental company (plus their admin fee). Learn the default limits (they’re often unsigned — e.g., 50 km/h urban in much of Europe).
  • Right of way. Priority-to-the-right rules (France, Belgium), roundabout protocols, and pedestrian priority vary. Learn the specific country’s rules — 10 minutes of reading prevents accidents.
  • Alcohol limits. Often MUCH lower than the US (0.05% or 0.02% or zero in many countries). The safe rule abroad: don’t drink and drive, period.
  • Required equipment. France (hi-vis vest, warning triangle, breathalyzer), Germany (winter tires in winter — legally required), Spain (spare glasses if you wear them, warning triangles). Fines for missing equipment are real.
  • Phone use. Handheld phone use is illegal almost everywhere abroad, often with steep fines. Mount the phone, use hands-free.

Money traps (fuel, tolls, fines)

  • Fuel types. Diesel vs. petrol mix-ups destroy engines — and diesel is common in Europe. Check the fuel cap label, check the pump, check twice. Wrong fuel = your liability, thousands of dollars.
  • Toll systems. France/Italy/Spain (pay booths, keep cash/card handy), Portugal (electronic — rental must be registered), Switzerland/Austria (vignette sticker required — buy at the border), Norway (AutoPASS billed later). Research your route’s tolls; unregistered toll driving = fines.
  • ZTL / low-emission zones. Italian city centers (ZTL — zona traffico limitato) fine non-permit cars automatically via camera — €100+ per entry, and GPS will happily route you through them. Same for London ULEZ, German Umweltzonen (need the sticker). Know the zones; park outside and walk/transit in.
  • Parking. European city parking is expensive and scarce — budget €20–40/day in cities, learn the disc/blue-zone systems, and never park illegally (towing + fines ruin days).
  • Return full, on time. Fuel policies (full-to-full is best — photograph the gauge), late returns billed in full-day increments, after-hours drop procedures (photograph everything again).

If something goes wrong

  • Accident: EU requires a European Accident Statement (constat amiable) — the rental should include blank forms. Fill it out with the other driver, photograph everything, call the rental company’s roadside number immediately.
  • Breakdown: call the rental company’s assistance number (save it in your phone at pickup) — not a random tow truck.
  • Police stop: carry license + IDP + rental agreement + passport. Be polite, comply, pay legitimate fines through official channels.

The State Department’s driving-abroad pages have country-specific road safety information — check your destination’s before departure, especially for developing countries where road risks are the #1 traveler safety issue.

Driving on the left (the survival guide)

The first hour driving on the left is the most dangerous hour of the trip — jet lag plus mirror-image instincts. The survival protocol: do not drive on arrival day if you flew far (take the train/taxi to your first stop, get the car the next morning rested). When you do start: say “stay left” out loud at every turn and roundabout for the first day (verbal reinforcement overrides muscle memory), stick a “KEEP LEFT” note on the dashboard, and let a passenger navigate so you can focus purely on road position.

The specific danger zones: roundabouts (give way to the right, enter left — say it out loud), turning at intersections (the instinct to swing wide into the wrong lane), quiet rural roads (no traffic to follow — this is when people drift), and the day you switch back (returning home, your brain kept the left-driving habit — stay alert for a day). Millions of Americans drive on the left every year without incident; the ones who do it safely are the ones who respected the first hour. The How can I avoid jet lag on long international flights jet lag guide matters here too — a rested driver on the left is safe; an exhausted one is not.

The one-way rental trick: for road trips like the How do I plan a road trip across the country on a budget cross-country drive or the What are the best roadside attractions on route 66 Route 66 run, one-way rentals solve the loop problem — fly into Chicago, drive 66, fly home from LA. One-way fees used to be brutal; they are now often modest ($50–150) or waived on popular routes. Price both the loop and the one-way — the time saved not backtracking is usually worth the fee.

Further reading: driving abroad guidance from the State Department.

Takeaway: Renting a car abroad goes smoothly with an IDP from AAA ($20), the right booking (small car, automatic reserved early if needed, credit-card CDW verified), photographed pickup condition, and homework on the country’s driving rules (side of road, speed enforcement, ZTL zones, toll systems, fuel types). The freedom of a car in the right destination is unmatched — just respect that the rules aren’t your rules, and the fines aren’t your fines’ size.