What a share certificate is and how your money grows

A share certificate is an agreement between you and a credit union or bank where you give them a sum of money for a set period of time, and they pay you a fixed interest rate in return. You cannot touch that money until the term ends without paying a penalty. In exchange for locking your cash away, the institution pays you more interest than a regular savings account would.

The way the money grows is straightforward: the bank or credit union holds your principal (the amount you deposited), and on a schedule they set—usually monthly, quarterly, or at maturity—they add interest to your account. That interest is calculated as a percentage of your principal. If you leave the interest in the certificate, it earns interest too in the next period, which is called compounding. If you withdraw the interest, only your original principal earns the next round of interest.

Share certificates are different from stocks or mutual funds because there is no market risk. Your money does not go up or down based on how a company performs. The return is may provide by the institution holding the certificate, as long as you hold it until maturity.

Key Takeaways

  • You deposit a fixed amount of money for a set term (usually three months to five years), and the bank or credit union pays you a may provide interest rate for that entire period.
  • You cannot withdraw your money before the term ends without paying an early withdrawal penalty, which is typically a few months' worth of interest.
  • The interest rate is locked in when you open the certificate, so it does not change even if market rates rise or fall.
  • Interest compounds on a schedule set by the institution, meaning you earn interest on your interest if you do not withdraw it.
  • Share certificates are insured by the National Credit Union Administration (NCUA) up to $250,000 per account holder at each institution.

The term length and what happens at maturity

When you open a share certificate, you choose or are offered a term—the length of time your money stays locked in. Common terms are three months, six months, one year, two years, three years, and five years. Some institutions offer longer terms, and a few offer shorter ones. The longer the term, the higher the interest rate is usually offered, because the bank has your money for longer and can lend it out.

At the end of the term, your certificate reaches maturity. At that point, the institution sends you a notice (usually 10 to 30 days before maturity) telling you what will happen next. You have a few options: you can withdraw the money and interest, you can roll the certificate over into a new one at the current interest rate, or you can move the money to a different account. If you do nothing, many institutions will automatically roll the certificate into a new one at the same term length, though at whatever the current interest rate is—which might be higher or lower than what you were earning.

If you withdraw money before maturity, you will pay an early withdrawal penalty. This penalty is usually three to six months of interest, though it varies by institution and term length. A three-month certificate might have a penalty of one month's interest, while a five-year certificate might have a penalty of six months' interest. Some institutions charge a flat dollar amount instead. Always ask what the penalty is before you open the certificate.

How the interest rate is set and what affects it

The interest rate on a share certificate is set by the institution and is based on what the Federal Reserve is doing with short-term interest rates. When the Fed raises rates, banks and credit unions typically raise the rates they offer on new certificates. When the Fed lowers rates, new certificates offer lower rates. However, your rate is locked in for the entire term—if you open a two-year certificate at 4.5 percent, you will earn 4.5 percent for the full two years, even if rates drop to 2 percent next month.

The rate also depends on the term length. A six-month certificate will usually pay less than a one-year certificate, which will usually pay less than a five-year certificate. This is because the institution is committing to a rate for longer and wants to be compensated for that risk. Occasionally, when the Fed is expected to cut rates soon, the rate curve inverts and shorter terms pay more than longer ones, but this is temporary.

Different institutions offer different rates on the same term. A large national bank might offer 4.0 percent on a one-year certificate, while a small credit union might offer 4.5 percent. It is worth shopping around, especially for larger amounts, because the difference adds up. An online bank often pays more than a brick-and-mortar bank because it has lower overhead costs.

Early withdrawal and what it costs you

If you need your money before the term ends, you can withdraw it, but you will lose some of the interest you earned. The penalty is calculated from your principal, not from the total balance. If you had $10,000 earning 4 percent annually and the penalty is three months of interest, you lose $100 (one quarter of $400). You still get the interest you earned up to that point, minus the penalty.

Some institutions calculate the penalty differently. A few will charge you a flat fee—say, $25—instead of a percentage of interest. Others use a tiered system where the penalty is steeper if you withdraw very early and smaller if you withdraw closer to maturity. Read the certificate agreement carefully before you sign, because the penalty terms are not standardized.

The early withdrawal penalty is why share certificates work best for money you know you will not need. If there is any chance you might need the cash in the next year or two, a regular savings account with no withdrawal restrictions is safer, even if it pays less interest. The penalty can wipe out months of interest gains.

Share certificates versus savings accounts and money market accounts

A regular savings account has no term and no penalty for withdrawal, but it pays much less interest—often 0.01 percent or less at a traditional bank. You can take your money out whenever you want. A share certificate pays more interest but locks your money away and charges a penalty if you break the term early.

A money market account sits in the middle. It usually pays more than a savings account but less than a share certificate. It has some withdrawal restrictions (often a limit on how many times per month you can withdraw), but no fixed term and no early withdrawal penalty. If you want some flexibility and are willing to accept a lower rate, a money market account is an option.

The choice depends on your situation. If you have money you will not need for two or more years, a share certificate usually makes sense. If you might need the money within a year, a savings account or money market account is safer. If you are building an emergency fund, keep it in a savings account where you can access it without penalty.

How interest is paid and compounding

Interest on a share certificate is paid on a schedule set by the institution. Some pay monthly, some quarterly, and some only at maturity. When interest is paid, it is either deposited into a linked savings account, mailed to you as a check, or added back into the certificate itself. If it is added back into the certificate, that interest then earns interest in the next period—this is compounding.

Compounding makes a real difference over time. If you have $10,000 in a five-year certificate at 4 percent annual interest, compounded monthly, you will earn about $2,207 in interest. If the same certificate paid straightforward interest (no compounding), you would earn only $2,000. The difference grows larger with longer terms and higher rates. Always ask whether interest is compounded and how often.

The frequency of compounding matters. Monthly compounding is better than quarterly, and daily compounding is better than monthly. However, the difference is usually small unless the amount is very large or the term is very long. What matters more is the interest rate itself—a 4.5 percent certificate with quarterly compounding will beat a 4.0 percent certificate with daily compounding.

Insurance and safety of your money

Share certificates at banks are insured by the Federal Deposit Insurance Corporation (FDIC) up to $250,000 per depositor per institution. Share certificates at credit unions are insured by the National Credit Union Administration (NCUA), also up to $250,000 per depositor per institution. This means if the bank or credit union fails, your money is protected up to that limit.

If you have more than $250,000 to invest, you can spread it across multiple institutions to keep all of it insured. You can also open certificates in different ownership categories—for example, one in your name alone and one in a joint account with your spouse—and each is insured separately up to $250,000.

Share certificates are one of the safest places to put money because there is no market risk and the money is insured. The only real risk is that you will need the money before maturity and have to pay the early withdrawal penalty.

Frequently Asked Questions

Can I add more money to a share certificate after I open it?

No. A share certificate is a fixed agreement for a fixed amount. Once you open it, you cannot add to it. If you want to invest more money, you would need to open a separate certificate. Some institutions let you open multiple certificates at the same time with different terms, which is a way to spread your money across different maturity dates.

What happens if I need my money before the term ends?

You can withdraw it, but you will pay an early withdrawal penalty. The penalty is usually a few months of interest. For example, if you withdraw from a five-year certificate after one year, you might lose six months of interest. You still get the interest you earned in that first year, minus the penalty. Always check the penalty terms before you open the certificate.

Is the interest rate may provide for the whole term?

Yes. Once you open a share certificate, the interest rate is locked in for the entire term, no matter what happens to market rates. If you open a two-year certificate at 4.5 percent, you will earn 4.5 percent for the full two years, even if rates rise to 5 percent or fall to 3 percent.

Should I open a longer-term certificate to get a higher rate?

That depends on whether you think rates will rise or fall and whether you might need the money. If you think rates will rise soon, a shorter term lets you reinvest at a higher rate when it matures. If you think rates will fall, a longer term locks in the current rate. If you might need the money, the early withdrawal penalty could wipe out the extra interest you earn from a longer term.

Can I use a share certificate as collateral for a loan?

Yes. Many banks and credit unions will lend you money using your share certificate as collateral. You keep earning interest on the certificate while you repay the loan. The interest rate on the loan is usually lower than it would be without collateral. This is a way to access your money without paying the early withdrawal penalty, though you are paying interest on the loan instead.