I bond vs. high-yield savings account: Which is better for beating inflation?

With inflation hovering at 2.7% year over year, leaving your money in a basic savings account can cost you money; the average interest rate on a savings account is just 0.38%. That means the interest you earn on your savings account may not keep pace with inflation.

To maximize your return, stashing your money in a Series I savings bond (more commonly known as an I bond) or a high-yield savings account (HYSA) can be a smart alternative. Both of these products offer higher returns than traditional savings accounts, but there are some key differences to be aware of before deciding where to put your money.

Series I bonds are available through the U.S. Department of the Treasury, backed by the full faith and credit of the U.S. government.

The appeal of I bonds is in their two-pronged approach to interest: I bonds earn both a fixed rate of interest and a variable rate. The fixed rate stays the same for the life of the bond. The variable rate is tied to inflation and changes twice a year to coincide with changes to the Consumer Price Index for all Urban Consumers (CPI-U) — a benchmark that economists use to calculate the change in prices that consumers price for common goods and services.

What does that mean for you? You earn a guaranteed rate of interest with the fixed-rate portion of the I bond, but you’ll also earn the variable rate. Because I bonds can change along with market conditions, they can be a useful hedge against inflation.

For bonds issued between May and October 2025, the combined rate — the I bond rate calculated from the fixed and variable rate — is 3.98%.

I bonds earn interest for 30 years. Interest is earned monthly, but it’s compounded, or added to the principal, every six months. Once you’ve held the bond for at least 12 months, you can cash it in. However, if you cash in I bonds before you’ve held them for at least five years, you’ll sacrifice three months of interest.

• Guaranteed return: Because I bonds have a fixed-rate component, you have a guaranteed rate of return on your money. Right now, the fixed-rate portion is 1.10%.

• Higher rate of return: Currently, the combined rate of I bonds is set at 3.98%, which is significantly higher than the average return you’d find with a traditional savings account

• Exempt from state or local taxes: Although Series I bonds are subject to federal income taxes, they’re exempt from state or local taxes, helping you save money.

• Maximum limits apply: You can only buy up to $10,000 in electronic I bonds. (Previously, you could purchase an additional $5,000 in paper I bonds with your tax refund for a combined maximum of $15,000 per year, but paper bonds are no longer offered as of January 1, 2025.) If you’re trying to save a larger sum, you’ll have to find another tool for the excess amount.

• Must be held for one year: I bonds cannot be redeemed or cashed until you’ve held them for at least 12 months. If you have an emergency expense within the first year of owning an I bond, you won’t be able to tap into your bonds to cover the cost.

• Some withdrawals will result in loss of interest: Although you can cash in an I bond after 12 months, redeeming it within the first five years of its purchase will cause you to lose three months’ worth of interest.

Traditional savings accounts are tools for saving for emergencies or other financial goals. However, traditional savings accounts have low APYs, so an HYSA can be a valuable alternative.

Often available from online banks and credit unions, HYSAs provide significantly higher-than-average rates; among the accounts we identified as the 10 best high-yield savings accounts today, the highest APY available is 4.3%.

Savings accounts allow you to transfer money to checking accounts or brokerage accounts quickly and easily, and there’s no penalty for withdrawing money before a certain period of time has passed.

However, that rate is variable, and it can change at any time, so there’s no guarantee of future returns.

Read more: How often do high-yield savings account rates change?

• Liquid: With a savings account, you aren’t required to leave your money untouched for months at a time. You can transfer money or make withdrawals without losing the accrued interest.

• Higher-than-average rates: HYSAs provide substantially higher APYs than you’ll find with other deposit accounts, including traditional savings accounts, CDs, or money market accounts.

• Low deposit minimums:Many HYSAs have no minimum deposit requirement, so you can open an account with $0.

• May have monthly fees: Some HYSAs charge monthly fees that can only be waived if you meet certain requirements, such as maintaining a minimum balance or receiving direct deposits.

• Rates can change: The rates on HYSAs are variable, and banks or credit unions can change the rates at any time.

Read more: How much money should you keep in a high-yield savings account?

Series I bonds and HYSAs can be useful tools for fighting inflation. When deciding which option is better for you, consider these key factors:

• Initial investment: HYSAs usually require $0 to open an account, while an I bond requires at least $25.

• Maximum limits: There is no maximum amount you can deposit into a HYSA (though FDIC and NCUA insurance only cover up to $250,000). By contrast, there is an annual maximum of $10,000 in digital I bonds.

• Compounding: With HYSAs, interest is typically compounded daily and added to your account monthly. With I bonds, interest is earned monthly, and it’s added to the bond’s principal value twice per year.

• Fees: I bonds don’t have monthly fees. Although there are fee-free savings accounts, some HYSAs do charge monthly fees.

• Rates: The rate of an HYSA can change as market conditions fluctuate. With I bonds, there is a fixed rate of interest and a rate that’s tied to inflation, so they provide more surety.

Which type of account makes the most sense depends on your goals and intended use for your money.

HYSAs provide quick and easy access to your money, and the best HYSAs offer significantly higher-than-average rates. However, those rates can decrease over time.

I bonds may be a better option for those who want the combination of guaranteed returns and a variable rate that changes along with inflation.

Whether or not your savings can keep pace with inflation often depends on what kind of savings account you have, as well as the current inflation rate. Traditional savings accounts, for example, tend to pay very little interest and do not outpace inflation (the national average rate is just 0.38% as of July 2025, according to the FDIC).

However, other accounts, such as high-yield savings accounts, money market accounts, and CDs, currently pay upwards of 4% APY — well above the present inflation rate of 2.7%.

Although I bonds are considered a safe and effective way to save money, they do have some downsides.

For one, you may only purchase up to $10,000 per year in I bonds, so they’re not the best choice if you’re looking to save a larger amount of money. I bonds also have a longer time commitment in order to achieve the highest yield; you must wait at least 12 months to cash in your bond, and it fully matures after 30 years. Finally, because a portion of the rate is variable, based on current inflation, the rate can fall significantly — sometimes to near zero — meaning your returns could be lower than other investments.

Unfortunately, it’s not possible to predict the future value of an I bond. Although an I bond’s fixed rate remains the same throughout its life, the semiannual inflation rate can vary. That said, an I bond will at least hold its value and cannot lose money.