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CD Calculator

CD Early Withdrawal Penalty Calculator

CDを途中で解約した場合の費用が正確に分かります。

差し引かれる違約金
−$500.00
受取額
$26,045.83
定期預金と中途解約
$
%

5 年

1 年 6 月 into a 5 年 term

違約金(利息の月数)

複利頻度

現時点までの利息
$1,545.83
差し引かれる違約金
−$500.00
受取額
$26,045.83

Effective 2.77% APY on the money

Your principal is safe. After the $500.00 penalty you still keep $1,045.83 of interest, walking away with $26,045.83.

What you give up by leaving early

Held to maturity (5 年)$5,534.73
Withdrawn at month 18, after penalty$1,045.83

Leaving early costs you $4,488.91 in interest you would otherwise have earned.

Penalty modelled as N months of simple interest on principal — the most common bank structure. Check your disclosure: some banks charge a flat fee or a percentage of principal instead.

  • 無料 — 登録不要
  • 入力と同時に更新
  • ブラウザ内で動作

計算式とコンテンツの最終確認日 . 銀行の金利は頻繁に変動します。最新の金利は必ずご利用の金融機関に直接ご確認ください。

結論から

CDの中途解約手数料はどのように計算されますか?

A CD early withdrawal penalty is normally quoted as a number of months of interest — commonly around 3 months on terms under a year and 6 to 12 months on longer terms — and computed as Penalty = P × r × (penalty months ÷ 12). Take $25,000 in a 5-year CD at 4.00%, closed after 18 months: you have earned $1,545.83, the 6-month penalty is $500.00, and you walk away with $26,045.83. The figure to watch is the relationship between those first two numbers. Federal rules permit the penalty to reduce principal, so closing early enough that the penalty exceeds the interest earned returns less than you deposited — the one scenario in which an insured CD loses money. Penalty structures vary: a minority of institutions charge a flat fee or a percentage of principal instead, so check your disclosure.

計算式と手法

計算方法

Penalty = P × r × (penalty months ÷ 12)

Penalties are charged as simple interest on the principal, not on the accrued balance.

P
Principal — your original deposit
r
The CD's annual rate as a decimal
penalty months
Months of interest forfeited, from your disclosure

手順

  1. 1

    Find the penalty in your CD disclosure, stated as N months of interest.

  2. 2

    Multiply your principal by the annual rate to get a full year of interest.

  3. 3

    Multiply by penalty months ÷ 12 to scale it to the penalty period.

  4. 4

    Calculate the interest actually earned up to the withdrawal date.

  5. 5

    Subtract the penalty from that interest. A negative result means the shortfall is taken from your principal.

ガイド

この計算機の使い方

4つの入力だけで、結果はその場で表示されます。送信も会員登録も不要です。
  1. 1

    Enter the CD's details

    Deposit, rate and the original term — the same values from when you opened the account.

  2. 2

    Set when you would withdraw

    Drag the withdrawal month. The tool computes interest earned to that point and applies the penalty against it.

  3. 3

    Enter the penalty in months

    Take this from your disclosure. Three months is typical for short terms, six to twelve for multi-year CDs.

  4. 4

    Check the warning

    If the penalty exceeds interest earned, the tool flags that your principal will be reduced — you would get back less than you deposited.

計算例

実際の数値を最後まで計算しています。ご自身の数字と照らし合わせて、計算機の結果を確かめられます。

Breaking a 5-year CD at month 18

入力値

Deposit
$25,000
Rate
4.00%
Original term
60 months
Withdraw at
Month 18
Penalty
6 months of interest

結果

Interest earned
$1,545.83
Penalty charged
−$500.00
Net proceeds
$26,045.83

You keep $1,045.83 of interest. Painful, but principal is untouched because 18 months of accrual exceeded the 6-month penalty.

Breaking the same CD at month 3

入力値

Withdraw at
Month 3
Penalty
6 months of interest

結果

Interest earned
$251.24
Penalty charged
−$500.00
Net proceeds
$24,751.24

Here the penalty is larger than the interest earned, so $248.76 comes straight out of the $25,000 principal.

算出方法

精度と前提条件

どの計算機にも前提条件があります。当サイトの前提を明記しますので、この数値が何を織り込み、何を織り込んでいないかがはっきり分かります。
  • The penalty is quoted as months of simple interest on the principal — the most common structure, but some banks use a flat fee or a percentage of principal instead.

  • The bank permits early withdrawal at all. Some CDs are non-negotiable before maturity.

  • No partial withdrawal is modelled; the calculation assumes closing the full CD.

  • Grace periods after maturity, during which you can withdraw penalty-free, are not included.

計算の慣行は、米国の金融機関が預金口座のAPYを開示する方法を定めたRegulation DD(12 CFR 1030)に従っています。付保対象の金融機関への預金は、預金者ごと・銀行ごと・所有区分ごとに$250,000までFDICで保護されます。

一次情報

これらのルールの出どころ

この計算機が従う慣行は、当サイトではなく規制当局が定めたものです。各項目は定めている機関にリンクしていますので、当サイトの説明を信じるのではなく、ご自身で確認いただけます。

詳細

重要なポイントとルール

CDを開設または継続する前に知っておきたい要点をまとめました。
  • Federal rules permit the penalty to reduce principal — 'you can lose money on a CD' is only true in this scenario.

  • Typical schedule: terms under 12 months carry about 3 months of interest; 1–3 years around 6 months; 4+ years 9 to 12 months.

  • No-penalty (liquid) CDs exist and let you withdraw after the first week, usually at a lower rate.

  • Penalties are deductible on your federal return as an adjustment to income — they appear in Box 2 of Form 1099-INT.

  • If a higher rate is available elsewhere, breaking a CD can still be net-positive. Compare the penalty against the extra interest from switching.

活用シーン

この計算機が役立つ方

  • Savers who need cash early

    An unexpected expense has come up and you need to know the real cost of accessing the money.

  • Rate switchers

    Rates have risen since you locked in and you want to know if breaking out is worth it.

  • Pre-purchase researchers

    You are comparing CD terms and want to price the downside before you commit.

よくある質問

CD Early Withdrawal Penalty Calculatorのよくある質問

この計算について最も多く寄せられる質問への、直接的な回答です。さらに詳しくは FAQハブをご覧ください。
  • Penalty = P × r × (penalty months ÷ 12), where P is the principal, r is the CD's nominal rate as a decimal, and the penalty months come from your disclosure. It is simple interest on the full principal, not on the interest you happened to earn, and it does not shrink because you left near the end of the term. Take $25,000 in a five-year CD at 4.00%, closed after 18 months with a six-month penalty: 25,000 × 0.04 × 0.5 gives $500.00. You had earned $1,545.83, so you keep $1,045.83 of it and walk away with $26,045.83. Typical schedules run around three months of interest on terms under a year, six months on one-to-three-year terms, and nine to twelve months beyond that — but a minority of institutions charge a flat fee or a percentage of principal instead.

セキュリティとプライバシー

入力した数値がブラウザの外に出ることはありません

当サイトの計算はすべて、ご自身の端末上でJavaScriptとして実行されます。アカウントもサーバーへの通信もなく、入力された数値にアクセス解析が紐づくこともありません。
  • 銀行と同じ標準的な計算式

    Regulation DDのもとで銀行が用いるのと同じ、複利とAPYの慣行を使用しています。

  • 完全無料・ログイン不要

    登録もメールアドレスの入力も課金もありません。すべての計算機を、初回から制限なくお使いいただけます。

  • データがブラウザの外に出ることはありません

    すべての計算はJavaScriptによりブラウザ内で実行されます。サーバーへの送信も保存も行いません。

HTTPSで配信しており、混在コンテンツはありません。詳しくは プライバシーポリシー をご覧ください。すべての数値の根拠となる 計算式と算出方法 も公開しています。

Price the exit before you need it

Knowing the penalty in advance is how you pick the right term. See what an early withdrawal would actually cost you.