What Is a Variable-Rate Certificate of Deposit (CD)?

What Is a Variable-Rate Certificate of Deposit (CD)?

Let me explain what a variable-rate certificate of deposit, or CD, really is. It's a savings account you can get from banks or credit unions, sometimes called a flex CD. You lock your money in for a set period, but the interest rate changes based on things like the prime rate, Consumer Price Index, Treasury bills, or market indexes. And yes, the FDIC protects these just like other CDs.

Key Takeaways

Here's what you need to know right away. A variable-rate CD, or flex CD, gives you a fixed term with an interest rate that goes up and down. Expect a penalty if you pull your money out early. These aren't everywhere, so you might have to hunt for one with a good rate. They pay off when rates climb, but not so much if rates stay low or drop.

Understanding a Variable-Rate CD

When you put money into a variable-rate CD, you're securing it in an account that earns interest over the term, but you usually can't touch that interest until it matures. These CDs often come with limited term options, like 12, 24, or 36 months, and they're longer than average.

Finding one isn't always easy—you'll probably need to check smaller banks or credit unions. The interest rate fluctuates, and each institution picks its own factors to base it on.

Think of a bump-up CD as a kind of variable-rate option; it's more common, and rates only increase, not decrease, but you have to request the bump, and it's limited to once or twice.

Compare that to a fixed-rate CD, which locks in the rate for the whole term and offers more term choices, from 3 months to 5 years.

Overall, CDs are safe investments, insured by the FDIC up to $250,000 per depositor. They're reliable and low-risk, perfect for conservative types. They're great for diversifying your portfolio. If you're new or cautious, stick with fixed-rate, but if you're okay with a bit more risk and think rates will rise, consider variable-rate.

One important note: these usually require at least $500 to open.

Special Considerations of a Variable-Rate CD

You should keep a few things in mind with variable-rate CDs. They're best when rates are low but likely to go up during the term. If rates are high at the start and then drop, your returns could suffer.

Decide what matters to you—maybe a steep early withdrawal penalty isn't worth it compared to a no-penalty CD with easier access, even if the rate is lower.

There are downsides: long periods of low rates can hurt your earnings, even if they pick up later. Fixed-rate CDs might do better in those scenarios. Also, inflation can eat into your returns if it rises faster than your rate, reducing the real value of your money while it's locked away.

Example of a Variable-Rate CD

Take Meilee, who researches and finds a 12-month variable-rate CD tied to the federal funds rate minus 0.25%. The funds rate is 2.50% when she starts, so she gets 2.25% APY on her $1,000.

She expects rates to rise. Her friend Amy puts $1,000 into a fixed-rate 12-month CD at 3%.

After a month, the funds rate hits 3.25%, so Meilee's rate matches Amy's at 3%. By September, it's 4.75%, and Meilee earns 4.5% while Amy's stuck at 3%.

But if rates fell to 2% after six months, Meilee would only get 1.75%, while Amy keeps 3%.

Are Variable-Rate Certificates of Deposit (CDs) Insured by the Government?

Yes, CDs are safe because most are backed by FDIC insurance up to $250,000 per depositor at insured banks and savings associations.

What Happens If I Redeem a CD Before It Matures?

If you cash out early, you'll usually face a penalty, like losing several months of interest. You can't access the interest until maturity anyway. Some CDs have no penalty for early withdrawal, but they often pay less interest.

What Determines the Rate on a Variable-Rate CD?

The bank chooses the benchmark, like the federal funds rate, prime rate, or WSJ Prime Rate, plus how often it changes—maybe even daily. It's all up to them, and it's shown as APY.

The Bottom Line

Variable-rate CDs are a secure way to invest if you want modest interest that could grow with rising rates, but remember, interest is locked until maturity. They have pitfalls, like suffering from low or falling rates, where fixed-rate CDs might be better.