Americans who want to travel to the United Kingdom next year will need to take an additional step in their travel plans.

Beginning on January 8, most U.S. citizens heading to or through the UK will be required to obtain an Electronic Travel Authorization (ETA), as announced by the U.S. State Department.

This system was introduced in early 2023 and aims to create a more efficient and secure digital immigration process for the millions of individuals crossing U.K. borders each year. Initially scheduled for launch at the end of 2023, its implementation has been delayed.

The UK is now among several countries, including the U.S., Canada, Australia, and soon the European Union, that already have their own authorization systems.

Although obtaining the ETA may require some extra planning and incur a minor fee, the application process is designed to be “quick and simple,” according to the U.K. Home Office.

Here’s what travelers need to be aware of.

What is the UK’s Electronic Travel Authorization?

The ETA is not a visa, nor does it grant official entry to the U.K. Instead, it serves as a digital permit for individuals from non-visa nations traveling to the U.K. “ETAs allow us to have a comprehensive view of travelers entering the U.K. and enable us to restrict entry for those who may pose a risk, including those simply transiting through U.K. airports,” states the U.K. Visas and Immigration website.

This requirement applies to Americans without a visa, dual citizenship, or authorization to live, work, or study in the U.K. All travelers—including infants and children—who fall into this category must obtain an ETA. (You can apply on behalf of others as well.)

The ETA is necessary for U.K. visits for tourism, family and friend visits, business, short-term studies (up to six months), Creative Worker visa concessions (up to three months), permitted engagements like conferences, or for those merely transiting through the U.K. to another destination.

How can you apply for an ETA?

The application process for the ETA began on November 27, allowing travelers to apply for trips starting January 8. The fastest method is to use the U.K. ETA app on a mobile device—this option also leads to quicker decisions—but you can also submit an application online from your computer.

To apply, travelers must have a passport, an active email address, and a method for online payment. The application will require the submission of biographical, biometric, and contact details, as well as responses to a few security questions. Applicants must also upload a photo of their passport and a personal photo.

How long is the approval valid for?

Once granted, the ETA is valid for two years, allowing multiple trips to the U.K. for stays up to six months at a time. However, if you receive a new passport, you will need to apply for a new ETA, as it is linked to the passport used during application.

What is the cost of the ETA application?

The fee for applying for an ETA is a non-refundable £10 (approximately $12.58) per individual.

How long will the ETA application take to process?

Completing the application should only take about 10 minutes. You can expect to receive your approval via email within three business days, but this timeframe could vary. If your application is denied, you will be informed of the reason, and you may reapply. However, if denied again, there is no appeal process, and you may have to apply for a visa.

Can I be refused entry to the UK even with a valid ETA?

Yes, having a valid ETA does not guarantee entry into the U.K. You will still need to check in with a Border Force officer and present your passport upon arrival.