How to calculate CD returns?

You calculate a CD's return by finding the maturity value with A = P(1 + r/n)^(nt), then subtracting your deposit for the dollar return, and for an annualised percentage, computing (A ÷ P)^(1/t) − 1 with t as the term in years. A second, annualised figure is useful because dollar returns alone do not show whether the CD is a good rate or simply a large deposit held for a long time — a $20,000 CD held for two years shows a bigger dollar return than a $2,000 CD held for one year at a better rate, even though the second CD is the stronger offer. On a $20,000 deposit at 4.20% APY over 24 months, the maturity value is $21,715.28, so the dollar return is $1,715.28, and because 4.20% is already quoted as APY, the annualised return equals that same 4.20% regardless of the two-year term. Return figures here are pre-tax; CD interest is taxed as ordinary income in the year it is credited.

What is a good rate of return on a CD?

A CD rate is generally competitive when it tracks close to the broader interest-rate environment banks operate in at the time, but rates move constantly, so there is no fixed number that stays a good benchmark for long. The more durable test is your real return: subtract the current inflation rate from the CD's APY, since the nominal rate alone does not show whether your money is gaining purchasing power or just keeping pace with rising prices. A CD paying 4.20% APY during 3% inflation delivers roughly 1.2% in real terms — modest, but positive, meaning the deposit grows faster than prices rise. On $20,000 over 24 months at 4.20% APY, the nominal payout is $21,715.28, a gain of $1,715.28, though the real gain in purchasing power is smaller once inflation is accounted for. Because CD interest is also taxed as ordinary income, the after-tax real return is lower still than the raw figure suggests.

Is the CD payout the same as the return?

No, the payout and the return are two different figures describing the same CD. The payout is the full amount you receive at maturity — your original deposit plus all the interest that accrued — while the return is only the interest portion, the amount the CD earned you above what you put in. The distinction matters because the payout can look like a large number even on a low-yielding CD simply because the deposit was large, while the return is the figure that reflects how well the CD performed. On a $20,000 deposit in a 24-month CD at 4.20% APY, the payout at maturity is $21,715.28, and subtracting the $20,000 deposit isolates the $1,715.28 return, the figure worth comparing against a competing offer. If the CD is closed before maturity, the payout can differ further, because an early withdrawal penalty is subtracted from the interest earned, and in an extreme case that penalty can reduce the payout below the deposit.

CD Return Calculator

CD의 총수익과 만기 수령액을 확인하십시오.

See your total return, payout and earnings on a Certificate of Deposit from deposit to maturity.

만기 시: US$21,715.28
이자: US$1,715.28

내 예금증서

예치 금액

이자율

이자율 표시 방식

기간

개월

2 년

일반적인 기간

복리 주기

만기 금액: US$21,715.28
총 이자 수익: US$1,715.28
실효 APY: 4.20%

2 년 예금증서에 US$20,000.00, 금리 4.20% APY, 일 복리 복리로 US$21,715.28까지 증가 — 이자 US$1,715.28, 월평균 US$71.47입니다.

기간 중 잔액

원금이자

수치를 표로 보기

기간 중 잔액
개월	원금	이자	잔액
개설 시	US$20,000.00	US$0.00	US$20,000.00
5mo	US$20,000.00	US$345.81	US$20,345.81
10mo	US$20,000.00	US$697.59	US$20,697.59
14mo	US$20,000.00	US$983.39	US$20,983.39
19mo	US$20,000.00	US$1,346.20	US$21,346.20
2y	US$20,000.00	US$1,715.28	US$21,715.28

Calculated in your browser using A = P(1 + r/n)^nt. Nothing is sent to a server. Figures are before tax; confirm exact terms with your bank.

무료 — 가입 불필요
입력 즉시 반영
브라우저에서 실행

공식과 내용 최종 검토일 2026년 7월 21일. 은행 금리는 자주 바뀝니다. 현재 금리는 거래 기관에 직접 확인하십시오.

짧은 답변

CD 수익은 어떻게 계산하나요?

Your CD return is the maturity value minus your deposit, expressed either in dollars or as an annualised rate. Compute the dollars with A = P(1 + r/n)^(nt) − P, and the annualised rate with (A ÷ P)^(1/t) − 1, where t is the term in years. A $20,000 CD at 4.20% APY over 24 months returns $1,715.28. The annualised form matters when you are comparing CDs of different lengths: a three-year CD paying $1,411.66 on $10,000 sounds better than a one-year CD paying $450.00, but both annualise to 4.50% and are therefore the same offer stretched over different periods. Annualising also lets you compare a CD against instruments quoted as yields, such as Treasury bills. What it does not capture is reinvestment risk — what you can earn on the money once the shorter CD matures.

공식과 방법

계산 방법

Rate of return = (A ÷ P)^(1/t) − 1

Annualises your total return so CDs of different lengths can be compared.

A: Maturity value — total payout
P: Principal — your deposit
t: Term in years

단계별 계산

1
Find the maturity value with A = P(1 + r/n)^(nt).
2
Subtract your deposit to get the total dollar return.
3
For the rate of return, divide the maturity value by the deposit.
4
Raise that ratio to the power of 1 ÷ term in years.
5
Subtract 1 and multiply by 100 for an annualised percentage.

가이드

이 계산기 사용법

네 가지 값만 넣으면 결과가 바로 나옵니다. 제출할 것도, 가입할 것도 없습니다.

1
Enter your deposit and rate
Start with the amount you will lock up and the rate the bank has quoted you.
2
Set the full term
Returns compound, so a 24-month CD returns more than twice a 12-month CD at the same rate.
3
Read the payout
The result card separates your original deposit from the earnings, so you can see the return on its own.
4
Check the chart
The growth chart shows how the return accelerates in the later months as compounding takes hold.

예시

계산 예시

실제 숫자로 끝까지 풀어 본 예시입니다. 직접 넣으신 값과 대조해 계산기가 맞는지 확인해 보십시오.

$20,000 in a 24-month CD at 4.20% APY

Deposit: $20,000
Rate: 4.20% APY
Term: 24 months

Total return: $1,715.28
Payout at maturity: $21,715.28
Annualised return: 4.20%

The second year returns $875.28 against the first year's $840 — the extra $35.28 is compounding working on year one's interest.

계산 방법

정확성과 가정

모든 계산기는 어떤 가정 위에서 움직입니다. 이 숫자가 무엇을 반영하고 무엇을 반영하지 않는지 그대로 밝혀 둡니다.

Return is nominal and before tax or inflation. Real return equals the CD rate minus the inflation rate.
The CD is held to maturity; an early withdrawal penalty would reduce the return.
Interest compounds inside the CD rather than being paid out.

계산 관행은 미국 금융기관이 예금 계좌의 APY를 공시하는 방식을 규정한 Regulation DD(12 CFR 1030)를 따릅니다. 예금자보호 대상 기관의 예금은 예금자별, 은행별, 소유 형태별로 $250,000까지 FDIC의 보호를 받습니다.

1차 자료

이 규칙은 어디에서 왔나

이 계산기가 따르는 관행은 저희가 아니라 규제 기관이 정합니다. 각 항목은 해당 기관으로 연결되므로 저희 말을 믿는 대신 직접 확인하실 수 있습니다.

세부 사항

핵심 내용과 규칙

CD에 가입하거나 재예치하기 전에 알아 둘 만한 사실을 한눈에 정리했습니다.

A CD's return is contractually fixed, which is what distinguishes it from market investments — you know the payout on day one.
Real return is what matters for purchasing power: a 4.2% CD during 3% inflation returns roughly 1.2% in real terms.
Returns on CDs are taxed as ordinary income, not at the lower long-term capital gains rate.
Longer terms usually pay more, but they also lock you out of higher rates if rates rise — that is the trade-off a ladder solves.

서로의 관계

이 계산기가 필요한 분

Goal savers
You have a target amount for a down payment or a purchase and need to know if the CD gets you there.
Portfolio allocators
You are weighing the guaranteed CD return against bonds or a money market fund.
Retirees
You need a predictable payout figure to plan against, with no market risk attached.

모든 CD 계산기

정기예금(CD)의 모든 측면을 다루는 아홉 개의 계산기입니다.

자주 묻는 질문