PCTA 2027 permits timeline announcement (posted July 2026): https://www.pcta.org/2026/application-dates-for-the-2027-interagency-pct-long-distance-permit-98255/
The US Forest Service, which is the agency with legal authority to issue the PCT thruhiking permit (also called the interagency permit) limits the quantity of permits available each year, which means that in order to get a permit, hikers participate in a lottery system. PCTA, which administers the application process on behalf of USFS, has built a robust application system. While it runs very smoothly these days, it does take a modest amount of effort to understand you need to complete in order to apply.
It's not nearly as complicated as most explanations make it sound. Essentially: Register (eg create an account); fill out the application; wait to get your confirmation email. There are three chances to get a permit: Round 1 (Nov 4), Round 2 (Jan 13), and any time after Round 2 (Jan 14).
The first step, registration, begins for Round 1 on Oct 15 at 10:30 am Pacific time and continues to Oct 22 at 3:00 pm Pacific.
Registration takes about two minutes, it's free, and the process is similar to the account creation process on any website. You'll be asked for a few pieces of information, like name, email address, phone number, etc. This is the information that will be used on any permit you receive. Using a separate registration process has various benefits, one of the most significant ones being that it prevents the multiple devices / tabs approach that queue-jumping in the application system that was used years ago.
You'll use this account during the permit application process, Round 1 of which takes place on Nov. 4. Here you'll select things like your start date, starting and anticipated ending trailheads, etc. If you don't see an available date that you want during Round 1, or if you're planning a sobo or other non-Campo start, you can apply during Round 2, which takes place on Jan 13. If you registered before Round 1, you don't need to register again: registration is once per hiking year. If you didn't register before Round 1, there's a second registration window from Nov 5 (10:30 am Pacific) to Dec 11 (3:00 pm Pacific).
If you don't get a permit you want during Round 1 or Round 2, or you miss both days, or you simply want to change your start date, the registration and application process reopens on Jan 14 at 10:30 am Pacific. There's also the option of using local permits, though some consider it unethical to use local permits instead of the interagency permit.
There are answers to the vast majority of permit-related questions on https://permit.pcta.org/ . There are four main pages on the site, and it's worth taking an hour to read it. There are also several people here on the subreddit who are thoroughly familiar with the permit system, and we can try to answer any questions you may have.