What Is the Penalty for Cashing an I Bond Early?
Cashing in savings early usually comes with some kind of catch, and I bonds are no exception. The good news is that the catch here is narrow, predictable, and easy to calculate ahead of time.
The short answer
Redeeming an I bond before it’s been held for five years results in forfeiting the most recent three months of interest. The penalty only applies to bonds cashed between one and five years of holding — bonds can’t be redeemed at all before one year, and after five years there’s no penalty for cashing in at any time.
How the three-month forfeiture is calculated
The mechanics are simpler than they sound. If a bond is redeemed, say, two years after purchase, the amount paid out reflects the bond’s value as of three months earlier, effectively wiping out the most recently accrued interest rather than touching any of the principal or interest earned before that final stretch. The minimum holding period for an I bond is what sets up this whole structure to begin with — the one-year lock comes first, and the shrinking penalty applies only during the years that follow.
Why only interest is at risk, not principal
This is an important distinction from some other early-withdrawal penalties. The I bond penalty never reduces the original amount invested — it only forfeits interest that has already accrued, and only the most recent three months of it. That’s a meaningfully different risk profile than losing money on a savings bond in some more dramatic sense; the principal itself is never at risk from early redemption, only a portion of the return.
How this compares with other timed penalties
Other savings vehicles impose their own early-exit costs. A CD early withdrawal penalty also typically forfeits a set amount of interest rather than principal, though the specific formula and timing differ by product, and CDs generally don’t impose a hard lock on withdrawals the way I bonds do for the first year. The common thread across both is that the penalty is designed to be a known, calculable cost rather than an open-ended one — an investor can generally figure out in advance roughly what they’d give up by redeeming early.
What this means when planning a timeline
Because the penalty shrinks to nothing once a bond passes the five-year mark, the practical cost of redeeming early depends heavily on when exactly the redemption happens. Cashing in at year one and a half forfeits the same three months of interest as cashing in at year four and a half — the penalty itself doesn’t get smaller as it approaches year five, it simply disappears entirely once that threshold is crossed. That structure tends to reward patience broadly rather than rewarding getting closer to the five-year mark in small increments.
The takeaway
The I bond early-redemption penalty is narrow and predictable: three months of interest, nothing more, and only if redemption happens sometime between year one and year five. It’s a manageable cost for money that ends up needed sooner than planned, but it’s also a good reason to think through a realistic timeline before buying, since the alternative — simply waiting past the five-year mark — sidesteps the penalty completely.