Choosing between a short-term and long-term certificate of deposit (CD) isn't always as simple as picking the account with the highest APY. While longer-term CDs have traditionally offered higher returns in exchange for locking up your money for a longer period, that's not always the case. CD rates also reflect expectations for future interest rates, meaning some short-term CDs can occasionally outpay longer-term options.

In addition to the interest rate, it's also important to consider when you'll need access to your money and where interest rates may be headed. Understanding the tradeoffs between short- and long-term CDs can help you choose the option that best fits your financial goals.

Savings timeline

When will you need the money in your CD? The more defined your timeline, the easier it is to choose the best term.

If you're saving up for a home purchase that's five years away, for example, a five-year CD can help you lock in a competitive interest rate and prevent you from dipping into your savings early.

If you're planning a vacation for next summer, however, a shorter one-year CD might do the trick. In short, the clearer you are about how long you have to save, the easier it will be to pick a term. 

Flexibility

Ask yourself whether you can afford for that money to be off-limits for a year or longer. Remember, you'll pay a penalty if you withdraw from your CD early, so some planning is in order. Of course, you can't plan for emergencies, but don't put so much money away that you're stretching your finances beyond what you can handle.

Interest rate environment

Expectations regarding where interest rates are headed can play a major role in determining whether a short- or long-term CD is the better choice. When you open a CD, the APY is fixed for the entire term, so you'll continue earning the same rate even if market rates move up or down after you open the account.

If interest rates are expected to rise in the near future, a short-term CD may make more sense. While it might offer a slightly lower APY today, it will mature sooner, giving you the opportunity to reinvest your money at a higher rate if banks increase CD yields. Choosing a long-term CD in a rising-rate environment could leave you locked into a lower rate while newly issued CDs pay more.

On the other hand, if rates are expected to fall, a long-term CD can help you preserve today's higher yields for several years. Once your rate is locked in, it won't decrease even if banks begin lowering APYs on new CDs.

Bottom line: Choosing between a short-term CD or long-term CD

Choosing the right CD term comes down to your own needs and goals, as well as market expectations. Here's what to consider when deciding between a short-term CD or long-term CD.

Choose a short-term CD if...

• You'll need the money within the next year or two.Short-term CDs (three months to one year) let you access your savings sooner without paying an early withdrawal penalty.

• You think interest rates may rise.When your CD matures, you can reinvest at a higher rate if yields have increased.

• You want more flexibility.If your financial plans could change, a shorter term reduces the amount of time your money is locked up.

• You're building a CD ladder.Short-term CDs are commonly used when creating a CD ladder to provide regular access to your funds.

Choose a long-term CD if...

• You won't need the money for several years.Long-term CDs (two to five years or more) are better suited for longer-term goals, such as saving up for a home down payment.

• You want to lock in today's rates.If you expect interest rates to fall, securing a competitive APY for several years can protect your earnings.

• You value predictable returns.A fixed rate can provide peace of mind regardless of what happens in the broader economy.