The Surprise Rental Car Fee That Doubled My Trip Cost in Latin America (and Why Credit Cards Don’t Help)

Imagine you book a rental car for $65, only to pay $409. Or you book for $155 and pay $355. Or you book for $172 and pay $254.

Now imagine all 3 happened to you inside a single 3-month stretch with 3 major U.S. rental brands at 3 different airports across 2 countries.

That was me between July and September 2026: Hertz in Cancún and National in Querétaro, both in Mexico, and Avis in Guatemala City. The cause was the same every time: A mandatory local third-party liability insurance charge was added at pickup. The charge was impossible to avoid unless I could produce proof of coverage, which most U.S. renters don’t have.

Combined, those 3 rentals cost me $625 more than I expected.

Here’s how to spot this fee, which agencies are more open about it, and why your existing coverage is unlikely to save you.

How the Trap Kept Catching Me

I consider myself a pretty savvy traveler, but I fell for a surprise fee 3 times in 3 months because it was set up differently each time and because the coverage most points-and-miles readers assume protects them — credit card rental CDW — doesn’t help here.

Rental 1: Avis in Guatemala City, Early July

I was quoted $152 by Avis but paid $254. The counter agent mentioned a “local liability” charge, which landed on the receipt as $100 under a section labeled “Optional Services” — a label that doesn’t feel accurate for something I had no realistic way to decline. I grumbled, paid it, and moved on, figuring it was a quirk of that specific agency and airport, not something I’d hit again.

Rental 2: Hertz in Cancún, Late July

My reservation email said $65, but I paid $409 to Hertz. Employees didn’t speak English. My Spanish is conversational, but it doesn’t include legal jargon for contracts. The agent’s explanation made it sound like I was declining insurance and that the amount on my card was a security hold, not the final price. There was no receipt at pickup or drop-off. When the charge posted to my Amex weeks later, I assumed it was a billing error or a hold Hertz forgot to release. Hertz didn’t reply when I asked for a receipt. I filed a chargeback, and Hertz responded with the signed contract. Amex ruled against me because my signature was on a paper I hadn’t fully understood.

Rental 3: National in Querétaro, Early September

I was still fighting the Hertz bill when this rental came up. I’d booked with National Car Rental through a travel agent whose online portal displayed third-party liability as INCLUDED, so this one was supposed to be different. It wasn’t. I paid $355 against a $155 booking.

What the Fee Actually Is

The industry calls it TPL: third-party liability. It covers damage or injury you cause to someone else, and it’s what U.S. auto policies and credit card CDW (collision damage waiver) usually don’t cover once you cross the border.

It costs roughly $15 to $25 per day, based on these rules:

• Mexico: Required by Mexican federal law since January 1, 2019, under Article 63 Bis of the Ley de Caminos, Puentes y Autotransporte Federal. Applies to every vehicle on federal highways, including rentals.
• Costa Rica: Required by Costa Rican law and administered by the state insurer INS.
• Guatemala: Guatemala’s regulation was issued in March 2025 and immediately repealed, so the government mandate isn’t currently enforced. Rental companies enforce it anyway. National’s written statement to me described the requirement as “required by the rental location,” not by Guatemalan law.

The result is the same in all 3 countries: If you show up with a U.S. license and a U.S. credit card, you pay this fee.

Why Your Credit Card Insurance Won’t Save You

Most U.S. travel advice recommends credit card rental CDW for damage coverage abroad. That advice may present 2 problems.

In my case, the rental company’s own policy language rejects U.S. credit card CDW as acceptable proof. National put it in writing when I asked: “Liability insurance purchased on third-party travel websites and insurance that accompanies U.S. credit or debit cards are not acceptable forms of coverage.” It doesn’t matter what your Platinum Card^® from American Express, Chase Sapphire Reserve^®, or Capital One Venture X Rewards Credit Card technically covers.

Second, card issuers have exclusions on where CDW applies. Visa and Mastercard exclude the Republic of Ireland, Northern Ireland, Israel, and Jamaica. American Express excludes Australia, Italy, and New Zealand. Rent in any of those and your credit card CDW doesn’t apply.

The chargeback approach doesn’t help either. Amex closed my Hertz dispute because I’d signed a contract I hadn’t fully understood across a language barrier.

The Difference Between Surprise and Unavoidable Fees

Not every rental counter fee is a trap. Some are genuinely optional. You can decline, though it comes with a trade-off.

Ireland’s Super CDW costs roughly €22 (about $25) per day. It’s optional, but declining leaves you on the hook for a deductible that can run €2,000 (about $2,270) or more if you crash. Iceland’s Sand and Ash Protection costs roughly 1,850 ISK (about $15.36) per day. It’s also optional, but damage from volcanic ash and highland gravel is real, and repair bills can hit 5 figures.

Japan has a non-operation charge waiver that costs about 500 to 1,000 JPY (about $3.18 to $6.35) per day. It’s optional, but declining can result in a fee of 20,000 to 50,000 JPY (about $127 to $318) if the car is out of service after an incident.

Those are honest surprises and have trade-offs. The Mexico, Guatemala, and Costa Rica charges are different. You can’t say “no thanks” without an eligible alternative. Unlike Iceland, Ireland, and Japan, the charge is unavoidable in practice for most U.S. travelers.

Which Brands Warn You (and Which Don’t)

I tested online booking flows on all 6 major U.S. rental brands in Mexico, Guatemala, and Costa Rica. The disclosure practices depend on the parent company.

Enterprise, Alamo, and National display a callout during online booking that names the requirement, states the daily cost, and lists what doesn’t count as proof, including “credit card TPL policies.” The language uses “required” or “mandated.”

Avis, Budget, and Hertz don’t list the fee. Their booking flows show only U.S.-style optional coverage upsells with no reference to any country-specific requirement.

There are 2 exceptions worth highlighting. First, when I booked my Querétaro rental through a travel agent, National’s website displayed the coverage as INCLUDED, and the counter insisted I pay anyway. Second, National’s booking confirmation email does name the requirement, but the language appears on page 5 of a 6-page email, past the point where Gmail truncates it, which requires you to click “View entire message” to find it.

Most travelers never scroll that far.

I contacted all 3 companies to ask about these fees. National sent a general statement but didn’t answer follow-up questions. Hertz asked for my rental agreement number but didn’t communicate further. Avis didn’t respond to multiple emails.

What You Can Do About It

If you’re renting in Mexico, Costa Rica, or Guatemala, here’s what can save you money and time at the counter:

• Budget $15 to $25 per day on top of the online quote for a rental car. The base rate you’re shown isn’t the price you’ll pay unless the coverage is genuinely included or you have verifiable alternative coverage.
• Book with Enterprise, Alamo, or National if possible. They’re not necessarily cheaper, but the price you see is closer to what you’ll actually pay, and the fee is more clearly discussed.
• Don’t rely on credit card rental CDW as an alternative. It doesn’t count. In Ireland, Italy, Australia, Israel, Jamaica, and a few others, credit card CDW is excluded entirely.
• To opt out legitimately, buy a liability policy in advance. In Mexico, providers like Sanborn’s and MexInsurance sell standalone policies. Bring a printed copy of your policy.
• If you sign a foreign-language contract you don’t fully understand, your credit card chargeback won’t help. I tried, and I lost.

However, Hertz offered to refund this fee after I sent multiple emails and was blunt in a post-rental survey, saying the undisclosed fee

Final Thoughts

Enterprise shows that this disclosure isn’t hard: a callout during booking, a plain-English list of what won’t count as proof, and a running total that reflects the actual cost. Every other major U.S. rental brand operating in these markets is choosing not to be upfront with customers. Until they change that, don’t assume that the price you see when you book is the price you’ll pay.