Savings and CD disclosures come with their own shorthand. This glossary defines APY, tiered interest, maturity notices, grace periods and more, so you can compare offers accurately.
In a nutshell
- APY includes the effect of compounding, which makes it the better number for comparing accounts that compound at different frequencies.
- A 3% interest rate that compounds monthly can produce an APY of about 3.04%, which is why the APY is usually higher than the rate.
- For CDs longer than one year that do not renew automatically, banks must send a notice before maturity stating generally whether interest is paid after maturity.
- FDIC insurance covers up to $250,000 per depositor, per insured bank, for each account ownership category, including accrued interest.
- Early withdrawal penalties, minimum balances and grace period lengths are set by each bank, so read the account agreement before you open one.
Savings account and CD disclosures compress a lot of rules into a few lines of fine print. Banks are required to disclose the terms, but the terms only help if you know what each phrase means. This glossary defines the language you will see in savings and CD disclosures, from APY and balance tiers to maturity notices and grace periods, so you can compare offers on what actually matters.
The Two Rates on Every Disclosure
Interest rate. The base percentage a bank pays on your deposit before any compounding is counted. It shows the pace of earnings but not when, or how often, interest is added to your balance. A $1,000 balance earning a 3% interest rate grows by $30 in a year if none of the interest compounds.
Annual percentage yield (APY). The total interest an account would earn over one year, including the effect of compound interest. Because APY accounts for how often interest is added to the balance, it puts accounts that compound at different frequencies on equal footing. Banks tend to advertise the APY on savings products for that reason.
Do not confuse APY with APR, the annual percentage rate, which applies to borrowing. On a loan, the APR reflects the interest rate plus lender fees, which is why it usually runs higher than the rate itself. APY measures what you earn on deposits. APR measures what you pay to borrow.
| Term | What it tells you | What it leaves out |
|---|---|---|
| Interest rate | The base percentage paid on your balance | The effect of compounding |
| APY | Total estimated earnings for one year, with compounding | How often interest is actually credited to your balance |
Federal rules in Regulation DD, the Truth in Savings Act regulation, prescribe how banks calculate APY, including specific rounding conventions and treating a negative account balance as zero when figuring the yield. Because of that, the APY on one bank’s disclosure should be comparable to the APY on another’s.
How Interest Is Calculated and Paid
Simple interest. Interest calculated only on the original principal. A $1,000 deposit earning 5% simple interest produces $50 in a year, leaving a balance of $1,050.
Compounding. Earning interest on interest that was already earned. Interest may compound daily, monthly, quarterly or annually, and the more frequent the compounding, the faster the balance grows. This effect explains the gap between the two rates: a 3% interest rate that compounds monthly can produce an APY of about 3.04%.
Rates on savings accounts can fluctuate, while CD rates are typically fixed for the term. Savings accounts marketed as high-yield accounts, often abbreviated HYSA, work the same way as ordinary savings but advertise above-average rates that move with the market.
Crediting frequency. How often earned interest is actually added to your available balance. Compounding and crediting do not always match: federal calculation examples describe accounts that compound interest daily but credit it monthly, so the daily gains are tracked internally before they reach your spendable balance.
Accrued interest. Interest that has been earned but not yet credited or paid. It matters in two places: yield calculations handle accrued but uncredited interest in specific ways, and FDIC coverage counts accrued interest through the date an insured bank closes.
Minimums That Come With the Account
Minimum opening deposit. The smallest amount a bank will accept to open the account. For CDs, minimums often vary by term as well as by institution, so the same bank can require different amounts for different terms.
Minimum balance. The balance you must maintain to avoid a monthly fee or, on some accounts, to keep the advertised rate. Falling below it usually triggers a flat charge, which can quietly erase the interest earned on a small balance. Our article on monthly maintenance fees covers how these charges work and the waiver conditions banks commonly attach to them.
Tiered Interest and Balance Brackets
Tiered interest. A rate structure in which the APY depends on how much money sits in the account. The disclosure lists each tier with its own rate, so a larger balance can earn more than a smaller one at the same bank.
Balance bracket. The range of balances a tier covers, such as balances up to a stated cutoff and balances above it. Check whether the top rate applies to your entire balance or only to the portion inside the highest bracket, because the two methods produce different earnings.
Withdrawal Rules and Access Terms
Withdrawal limit. A cap on the number of certain withdrawals or transfers allowed per statement cycle. Savings-type accounts commonly carry these limits, and the disclosure should identify which transaction types count toward the cap. It should also say whether the bank declines transactions beyond the limit or pays them and charges instead.
Excess transaction fee. A charge for each withdrawal or transfer above the limit. Which transactions count, where the limit sits and what each excess item costs are account-specific terms, so they belong in the fee schedule you review before opening.
A money market account is another savings-type option, with its own minimums, rate tiers and access rules. Our guide to getting started with money market accounts explains how it differs from an ordinary savings account.
CD Terms From Opening to Maturity
Term. The fixed length of time your money must stay in the CD. Term lengths vary by bank, and longer terms often pay higher rates in exchange for giving up access to the money.
Maturity date. The day the term ends. From that date forward, you can withdraw the principal and the interest it earned without penalty.
Maturity notice. A written notice the bank must send before a CD matures when the term was longer than one year and the CD does not renew automatically. Under the Truth in Savings Act, that notice must generally state whether the bank will pay interest after maturity if you do nothing.
Automatic renewal (rollover). A feature that rolls a maturing CD into a new one without action from you. If the grace period expires and the CD renews this way, the new CD pays the bank’s current rate for that term, which may be higher or lower than the rate you originally received.
Grace period. A window after the maturity date to withdraw funds or choose a new CD without penalty. If the window closes and you have not acted, the bank may continue paying interest on the funds until you decide, depending on the account agreement.
Do this
Record the date each CD ends somewhere you check regularly, and set an alert a few days before it arrives. When you open the account, find out how long the grace period runs and what rate the bank would pay on a renewal.
Early Withdrawal Penalties
Early withdrawal penalty. The charge for taking money out of a CD before its maturity date. The size and the calculation method are set by the bank and disclosed in the account agreement, so read that section before you open the account, not after. One more detail: if a bank fails and its deposits move to another institution, the receiving bank sets its own interest rates and penalty terms, which can differ from what the original account promised.
Deposit Insurance Language
FDIC insurance. Protection from the Federal Deposit Insurance Corporation, an independent US government agency that covers deposits at insured banks if the bank fails. Coverage applies dollar for dollar to principal and accrued interest, up to the limit. Branches of the same bank are not insured separately, but CDs held at two different banks are. The FDIC uses the phrase “insured bank” to mean any bank or savings association it insures, and you can confirm a bank’s status with the FDIC’s BankFind tool.
Ownership category. The legal class an account falls into for insurance purposes, such as a single account owned by one person with no beneficiaries. Coverage is calculated per category, which is how a depositor can qualify for coverage above the standard limit at one bank by structuring accounts across categories.
Standard maximum deposit insurance amount. The baseline FDIC limit: $250,000 per depositor, per insured bank, for each account ownership category.
Mergers add a wrinkle. When two insured banks combine, deposits from the acquired bank are separately insured from your existing accounts at the surviving bank for at least six months after the merger. CDs from the acquired bank stay separately insured until the earliest maturity date after that period, and a CD renewed during the window on the same term and dollar amount keeps that treatment until its first maturity afterward. The window exists so depositors can restructure accounts if the combined balances exceed the limit.
Once the vocabulary is clear, comparison gets simpler. If you are weighing CDs against more flexible options, our step-by-step guide to building a CD ladder shows how staggered maturities balance access and rate, and our explainer on checking versus savings accounts sorts out which account fits which job.
Good questions
Is APY the same as APR?
No. APY measures what you earn on deposits and includes compounding. APR applies to loans and reflects the interest rate plus lender fees, which is why it usually runs higher than the loan’s rate.
What happens if I do nothing when my CD matures?
You may have a grace period to withdraw the funds or pick a new CD. If it expires, the CD may renew automatically at the bank’s current rate, or the bank may keep paying interest until you decide, depending on your account agreement.
Why is the APY higher than the interest rate?
The APY includes compound interest, meaning interest earned on interest already added to the balance. The more often interest compounds, the larger the gap between the two numbers.
Are tiered rates applied to my whole balance?
It depends on the bank. Some disclosures pay a tier’s rate on the entire balance, while others pay different rates on the portions of the balance in each bracket, so check how the tier structure works before you open the account.
This guide is general information, not financial or legal advice. Bank fees, account terms and screening policies vary by bank and change over time, so check the account’s fee schedule and terms before you open it. For federal rules, see the Consumer Financial Protection Bureau and the FDIC.