How the Visa Bulletin works
Every month the U.S. Department of State publishes the Visa Bulletin, the schedule that decides when a green card number is available for your category and country of birth. The checker above reads the latest one, so you can enter your priority date and see where you stand, how the cutoff moved this month, and a plain-language estimate of when your date may become current.
Final Action Dates vs Dates for Filing
The bulletin shows two charts each month, and they answer different questions. Knowing which one applies to you is half the battle.
Final Action Dates
Final Action Dates tell you when a green card can actually be approved and issued. When your priority date is earlier than the Final Action cutoff for your category and country, a visa number is available and your case can be completed.
Dates for Filing
Dates for Filing tell you the earliest point at which you may submit your application or send documents, often months before a number is truly available. Each month USCIS decides which of the two charts adjustment-of-status applicants may use, and it can pick a different chart for family cases than for employment cases.
You will also see two letters in the tables. "C" means current: numbers are available for everyone in that row regardless of priority date. "U" means unavailable: no numbers are being issued for that row this month.
The strict rule: One rule trips people up: being current means your priority date is strictly earlier than the cutoff. A priority date that exactly matches the cutoff is not current yet. You become current once the cutoff moves past your date.