What is a visa and how does it work?
A visa is official permission from a country to travel to its border and request entry. Here is how visas work, how you get one, and what a visa does not guarantee.
Updated
What a visa is
A visa is a decision made in advance by the country you want to visit. It says that a consular officer has looked at your documents, accepted your reason for travelling, and is willing to let you present yourself at the border.
Whether you need one depends on four things: your nationality, where you are going, how long you are staying, and why. Two people on the same flight can have completely different requirements because they hold different passports.
How a visa works, from application to arrival
- Check the rules for your nationality on the official immigration or foreign ministry website of your destination.
- Choose the right category. Tourism, business, study, work and transit each have their own conditions, documents and fees.
- Submit the application and pay the fee, then attend an appointment for biometrics or an interview if the country asks for one.
- Read the decision carefully. Check your name, passport number, validity dates and the number of entries you are allowed.
- Travel inside the validity window and show the visa at the border, where the officer admits you and records how long you may stay.
What a visa does not do
- It does not guarantee entry. A border officer can still refuse you, and that decision is theirs alone.
- It does not set your permitted stay. The stamp or digital entry record you get on arrival does that, and it is often shorter than the visa's validity.
- It does not extend your passport. If your passport expires, the visa inside it generally stops being usable.
- It does not let you work or study unless that specific category allows it.
Important: Always go by the date on your entry stamp, not the date on your visa. Overstaying by even a few days can lead to fines, deportation and a re-entry ban, and immigration systems keep that record for years.
Proof of accommodation for your application
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What a visa is and how it works - FAQ
A visa is permission from the country you want to visit to travel to its border and ask to be let in. It comes as a sticker in your passport or a digital record linked to it, and it is issued after an officer has checked your documents and accepted your reason for travelling.
A visa lets a country screen visitors before they arrive and decide what each person may do there. Tourism, business, study, work and transit each have their own visa category with its own conditions, so a tourist visa does not allow you to work or study. The border officer still makes the final decision on entry.
For many trips, no, but it depends on the destination. US citizens can visit France or Turkey as tourists for up to 90 days without a visa, while India and Brazil require an e-visa applied for online before travel, and the UK requires an electronic travel authorisation. Check the official site of each country on your route.
Yes. Every visa has validity dates, and you must enter before it expires. The time you may stay is set separately by the entry stamp or digital record you get on arrival, which can be shorter. A valid visa in an expired passport can sometimes still be used alongside your new passport, as with US visas, and overstaying can lead to fines and a re-entry ban.
There is no standard price, because each country sets its own fee. For example, a Schengen short-stay visa costs 90 euros for adults, and a US visitor visa application costs 185 US dollars. Visa centres may add a service charge, and the fee is almost never refunded if your application is refused.