As of 2026, Capital One rewards do not expire as long as your account remains open, active, and in good standing. This applies to "Miles" earned on the Venture series as well as "Cash Back" earned on Savor or Quicksilver cards. There is no limit to the amount of rewards you can accumulate over time. However, it is vital to know that if you close your account, you will immediately forfeit any unredeemed rewards. To avoid this, 2026 cardholders often "downgrade" to a no-annual-fee version of their card to keep the account active or transfer their miles to one of Capital One’s travel partners before closing the line. Additionally, if the account is closed by the bank due to "misuse" or inactivity (typically 12–24 months of zero transactions), the rewards are lost. To keep your balance safe, simply make a small purchase once or twice a year to ensure the account remains flagged as "active" in Capital One's system.