Where the Data Comes From

A passport index isn't a government office. It's a commercial product—a ranking system created by private companies that compile data from countless official sources to score global travel freedom. These tools, like the Henley Passport Index or Arton Capital's Passport Index, are just that: tools. They don't grant visas or set policy. This article demystifies where their data comes from, how they build the rankings, and why you must always, always verify their information with official sources before you travel.

Where Do Passport Indexes Get Their Information?

Passport indexes pull data primarily from the International Air Transport Association (IATA), then supplement it with their own in-house research and constant monitoring of government announcements. This isn't a one-time data dump. Visa policies are in constant flux, shifting with every new diplomatic tie, security threat, or health crisis. The real value of an index is its relentless effort to track and consolidate these changes from hundreds of countries and destinations.

The leading indexes don't all use the exact same recipe. The Henley Passport Index, for example, explicitly uses exclusive data from IATA, which runs the world’s most comprehensive database of travel information. Others, like Arton Capital's, blend publicly available government info, crowdsourced data (verified by their teams), and other proprietary research.

What is the International Air Transport Association (IATA)?

The International Air Transport Association (IATA) is the global trade association for the world's airlines. A huge part of its job is maintaining a massive database of travel documentation rules called TIMATIC. This is the system that tells airlines if you have the right documents for your destination and any layovers, helping them avoid massive fines for non-compliance. Private firms that publish passport indexes license this very data as the bedrock of their rankings.

What counts as a "destination"?

The scope is surprisingly broad. Most indexes start with the 193 UN member countries as a baseline. But then they add various territories and special administrative regions. For instance, the Henley Passport Index evaluates 227 possible travel destinations in total, which includes places like Hong Kong SAR, Macau SAR, and Taiwan. This wider lens provides a more complete picture of a passport's true global mobility.

How is a Passport's "Power" Score Calculated?

A passport's "power" score is simple in concept. It's the total number of destinations its holder can access without needing a traditional visa from an embassy before traveling. Each destination that offers visa-free access or a similarly easy entry process gets one point. The higher the score, the more "powerful" the passport.

That said, the indexes can disagree on what counts as "easy entry," which explains the minor differences you'll see in their final rankings.

Type of Access	Counts Toward Score?	Description
Visa-Free	Yes (1 point)	The passport holder can enter the destination without any prior visa application.
Visa on Arrival (VOA)	Yes (1 point)	A visa is granted upon arrival at a port of entry (airport, land border, or seaport).
Electronic Travel Authorization (eTA)	Yes (1 point)	A simple, low-cost online registration required before travel. Examples include the U.S. ESTA or Canada's eTA.
Pre-departure eVisa	No (0 points)	A full visa that must be applied for and approved online before travel begins.
Streamlined eVisa	Sometimes (1 point)	Some indexes, like Passport Index, count an eVisa if it is issued automatically or within 1-3 business days.

Visa-Free

This is the gold standard. It means you can just show up, present your passport to immigration, and walk in without any prior paperwork. This always scores one point.

Visa on Arrival (VOA)

This allows you to get your visa when you land, usually at a counter in the airport before you get to the main immigration line. Because it requires no pre-departure planning or embassy visits, it's treated as a form of visa-free access for ranking purposes and scores one point.

Electronic Travel Authorization (eTA)

An eTA is a light-touch digital pre-screening, far less intensive than a full visa application. It's an online system that checks if you're eligible to visit without a visa. The process is fast, cheap, and approval often comes in minutes, so it scores one point, same as visa-free.

What about eVisas?

Here's where things get tricky. A standard eVisa—which is just a traditional visa application moved online—is almost never counted toward a passport's score. The exception? Some indexes make a distinction. Passport Index, for instance, will award a point if an eVisa is granted with minimal fuss, typically within one to three business days. This acknowledges that some electronic visa systems are becoming nearly as convenient as an eTA.

Are Passport Index Rankings Legally Binding?

No. Absolutely not. Passport index rankings have zero legal authority and do not guarantee entry into any country. Think of them as informational guides, not legal documents. The final say on whether you are admitted rests exclusively with the immigration and border control officers of the country you are trying to enter.

It helps to see a passport index like a stock market report for global mobility. It gives a snapshot of a passport's relative strength right now, but it doesn't set the "price" of entry or guarantee future performance. A high ranking signals widespread travel freedom, but it is never a right of entry.

What Are the Risks of Relying Only on a Passport Index?

The single biggest risk is using outdated information. Visa policies are fluid. They can change overnight. A country listed as "visa-free" today could suspend that agreement tomorrow due to a diplomatic spat or public health scare.

Relying on an index without double-checking leads to disaster. You could be denied boarding by your airline or, worse, turned away by immigration after a long flight. Indexes also miss the fine print—the full range of entry requirements that can trip you up. These often-overlooked details include:

• Passport Validity: Many countries require your passport to be valid for at least six months beyond your planned departure date.
• Blank Pages: Don't get caught out. Some destinations require one or two completely blank pages for their stamps.
• Proof of Funds: An immigration officer can always ask for evidence you have enough money for your stay.
• Onward Travel: You'll often need proof of a return or onward ticket.
• Accommodation: Be prepared to show a hotel booking or a letter of invitation.
• Transit Visas: An index score for your final destination says nothing about the visa you might need for a layover in a third country.

How often is the data updated?

Major indexes monitor visa policy changes continuously, often updating their internal databases in near real-time. But the public-facing rankings you see online are a different story. They are typically refreshed quarterly or annually. That lag means a government policy can change long before the score you're looking at is updated. If you file for a new passport or citizenship in January, don't be surprised if the ranking you based your decision on is already out of date by April.

Where should I get the definitive information?

For definitive, legally binding entry requirements, there's only one place to look: the official embassy, consulate, or immigration authority of the country you plan to visit. Before booking a single non-refundable flight, check their official government website. It's the only way to be certain you have the most current and accurate information.