How Early Can You Apply for a UK ETA? 2026 Guide

You can apply for a UK ETA as early as you like, but there is a catch: the authorisation lasts two years from approval, so applying many months ahead simply burns through that validity. For most trips, applying two to three weeks before you fly — and at least three working days before — hits the sweet spot for £20.

TL;DR: There is no official “earliest” limit for a UK ETA. It is valid for two years or until your passport expires, whichever comes first. Apply a couple of weeks ahead, never fewer than three working days, and avoid applying so early that a passport renewal wipes it out.

• Earliest: no fixed maximum window — but the two-year clock starts at approval (gov.uk/eta, 2026).
• Latest safe point: at least three working days before travel.
• Sweet spot: two to three weeks before departure.
• Validity: two years or until the passport expires (2026).
• Fee: £20 per person, one application.

How far in advance can you apply?

Technically, whenever you want. The Home Office does not cap how early you submit, so you could apply the day you decide to visit. The real limit is not a rule — it is the two-year validity. Approve it too soon and you spend part of that window before you even travel.

Here is the maths that matters. An ETA approved in January 2026 runs until January 2028. If your trip is not until late 2027, you have used almost the whole life of it before setting foot in Britain. For a single trip that is fine; if you visit often, applying closer to departure keeps more of the two years for future visits, as the when-to-apply timing guide explains.

There is also the “book first, worry later” habit. Plenty of travellers reserve flights the moment prices dip, then forget the ETA until packing week. Neither extreme is comfortable: apply a year out and you gamble on your passport; apply the night before and you gamble on processing. The middle ground is calmer and costs exactly the same.

Why applying too early can backfire

The bigger trap is your passport. An ETA is tied to one passport, and it dies with that document. Renew or replace the passport and the ETA no longer counts — you reapply against the new one. So applying 18 months out, then renewing a passport that was near expiry, means paying £20 twice.

Omar did exactly that. Excited about a trip, he applied a year ahead, then renewed his soon-to-expire passport six months later. The early ETA was wasted, and he applied again on the new passport. Had he waited, one £20 would have covered him. Check your passport’s expiry before you rush — the UK ETA requirements guide covers what your document needs.

Pro tip: If your passport expires within about a year, sort the passport first, then apply for the ETA. Applying early on a passport you are about to replace is the most common way people pay the £20 fee twice.

Would rather not weigh all this up alone? We can check your passport dates and timing, then complete the UK ETA application for you — reassuring for older travellers filling in an online form for the first time.

The latest you should safely apply

At the other end, do not leave it to the airport. Decisions usually arrive within one day and can take up to three working days, according to the Home Office ETA factsheet, 2026, and many arrive in minutes — but a small number are referred for extra checks. Leave a buffer so a slower case does not collide with your flight.

1. Apply at least three working days out for standard peace of mind.
2. Aim for two to three weeks if you can, especially in busy seasons.
3. Do not book non-refundable travel assuming instant approval.
4. Track it using the status check guide if a decision is slow.

Busy periods stretch the odds. School holidays, summer and the run-up to Christmas bring a surge of applications, and referred cases can sit longer in the queue. If your trip lands in one of those windows, treat two to three weeks as the target rather than the maximum. It is the cheapest insurance you will buy for the whole journey.

Sofia cut it fine, applying the evening before an early flight. Hers came through in twenty minutes — but she admits she barely slept. A few days’ head start would have cost nothing and saved the nerves. If something does go wrong in the form, the guide to correcting a UK ETA mistake sets out your options.

Does applying early change the fee or validity?

No on the fee, yes on how much validity you keep. The charge is always £20, whenever you apply. What shifts is the calendar: the two years count from approval, not from your travel date. Applying earlier does not extend the ETA — it just starts the clock sooner.

For frequent visitors the ETA is a genuine convenience — one £20 covers unlimited trips for up to two years. If you need to stay beyond the visit limits, that is a different route; the guide to extending your UK stay explains where an ETA ends. Payment and cost details sit on the fee guide and the payment guide, and dual nationals should check the dual nationality rules first.

Practical tips on timing your application

• Check passport expiry before applying — renew first if it is close.
• Target two to three weeks out, not months, for single trips.
• Never rely on same-day approval for a non-refundable flight.
• Keep the documents checklist handy so nothing delays you.
• Apply on your phone with the UK ETA mobile app for the quickest route.

The one date that should drive your decision is your passport’s expiry, not your holiday countdown. Line the two up: if the passport is comfortably valid, apply a few weeks before travel and forget about it. If it is close to renewal, deal with the passport first, then the ETA. Get that order right and a single £20 covers you for the full two years.

Disclaimer: we are an independent assistance service and are not part of the UK government. You can apply directly on gov.uk for £20, or use our checking and support service to get the timing right.

Frequently Asked Questions

How early can you apply for a UK ETA?

There is no official maximum, so you can apply whenever you like. The catch is the two-year validity, which starts at approval. Applying months ahead uses up that window before you travel, so a couple of weeks out is usually ideal.

Can I apply months in advance?

Yes, but weigh it against the two-year limit and your passport’s expiry. If the passport is near renewal, an early ETA can be wasted, forcing a second £20 application on the new document.

What is the latest I should apply?

At least three working days before travel, since most decisions arrive within that time. Aim for two to three weeks in busy seasons. Leaving it to the day of the flight risks a delay if your case needs extra checks.

Does applying early cost more?

No. The fee is £20 whenever you apply. Applying early does not raise the price or extend the ETA — it only starts the two-year validity sooner, so you keep less of it for later trips.

If I renew my passport, is my early ETA still valid?

No. An ETA is linked to one passport and ends when that passport is replaced. Renewing means reapplying against the new passport, which is why applying very early on an expiring document can backfire.

Can I apply the day before I fly?

You can, and many approvals come within minutes. But a minority are referred for checks that take up to three working days, so a last-minute application is a gamble. Give yourself a few days if possible.

Does the ETA cover multiple trips?

Yes. One £20 ETA allows unlimited visits for up to two years or until your passport expires, with stays of up to six months each time. That makes applying closer to your first trip more efficient for frequent visitors.

Should I book flights before applying?

Apply, or be confident of approval, before committing to non-refundable travel. While most ETAs are approved quickly, booking first and applying late leaves no safety margin if a decision is delayed.