These two dates decide whether you pay interest. Here is the difference at a glance:

Statement dateDue date
What it isThe day the bank closes your monthly billThe deadline to pay that bill
Typical gapAbout 20 days after the statement
If you ignore itNew purchases land on a bill sooner than you thinkInterest and late fees start

Why the gap matters

The gap between the two is your grace period. Pay the statement balance in full by the due date and everything inside that window costs you nothing extra.

Add both dates for each card in this app and the dashboard shows the gap — plus a warning when a card’s statement is about to close.