Aller au contenu
CD Calculator

CD Yield Calculator

Turn a quoted CD rate into the yield you actually keep.

À l'échéance
53 106,31 $US
Intérêts
3 106,31 $US
Votre CD
$
%

Le taux est exprimé en

m

1 an 6 m

Durées courantes

Fréquence de capitalisation

Valeur à l'échéance
53 106,31 $US
Intérêts totaux gagnés
3 106,31 $US
APY effectif
4,10%

50 000,00 $US dans un CD sur 1 an 6 m à 4,10% APY, capitalisé quotidienne, atteint 53 106,31 $US — soit 3 106,31 $US d’intérêts, en moyenne 172,57 $US par mois.

Solde sur la durée

CapitalIntérêts
Afficher les chiffres sous forme de tableau
Solde sur la durée
MoisCapitalIntérêtsSolde
À l’ouverture50 000,00 $US0,00 $US50 000,00 $US
4mo50 000,00 $US674,20 $US50 674,20 $US
7mo50 000,00 $US1 185,81 $US51 185,81 $US
11mo50 000,00 $US1 876,00 $US51 876,00 $US
14mo50 000,00 $US2 399,75 $US52 399,75 $US
18mo50 000,00 $US3 106,31 $US53 106,31 $US

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.

  • Gratuit — sans inscription
  • Mise à jour instantanée
  • Fonctionne dans votre navigateur

Formules et contenu vérifiés pour la dernière fois le . Les taux bancaires évoluent fréquemment — confirmez les taux en vigueur directement auprès de votre établissement.

La réponse en bref

How do you calculate the yield on a CD?

A CD's yield is the interest it pays expressed as a percentage of the deposit, and there are three versions of it that get confused with one another. Total yield over the term is simply interest ÷ principal: a $50,000 CD at 4.10% for 18 months earns $3,171.34, a total yield of 6.343%. Annualised yield — the APY — restates that as a per-year figure so terms of different lengths can be compared, here 4.185%. After-tax yield subtracts what you owe, and for most savers it is the only one that describes reality: at a 24% marginal rate the same CD keeps $2,410.22, an after-tax APY of roughly 3.181%. The reason the distinction matters is that CD interest is taxed as ordinary income at your full marginal rate in the year it is credited, not at the long-term capital gains rate, so the headline yield on a CD is further from the yield you keep than on almost any other saving instrument.

Formule et méthode

Comment le calcul est effectué

Yield = (A − P) / P

Total yield over the term. Annualising it gives the APY: (A/P)^(1/t) − 1.

A
Maturity value at the end of the term
P
Principal — your opening deposit
t
Term in years, used to annualise
APY
Annualised yield — the per-year rate the term-yield implies
τ
Your marginal tax rate; after-tax yield ≈ APY × (1 − τ)

Étape par étape

  1. 1

    Compute the maturity value A with A = P(1 + r/n)^(nt).

  2. 2

    Subtract the principal to get the interest the CD paid.

  3. 3

    Divide by the principal. That is the total yield across the whole term.

  4. 4

    Raise (A/P) to the power 1/t and subtract 1 to annualise it into an APY.

  5. 5

    Multiply the APY by (1 − your marginal tax rate) for the after-tax yield.

Mode d'emploi

Comment utiliser ce calculateur

Quatre données, des résultats en direct. Rien à valider et aucune inscription.
  1. 1

    Enter your deposit and rate

    Type the amount and the rate from the bank's rate sheet, setting the toggle to match whether they quoted an APY or a nominal APR.

  2. 2

    Set the exact term

    Yield is only comparable once it is annualised, and annualising needs the true term. A 13-month promotional CD is not a one-year CD.

  3. 3

    Read the effective APY

    The effective APY tile is the annualised yield. This is the figure to carry across to any other offer, whatever term it runs for.

  4. 4

    Apply your tax rate

    Multiply the APY by one minus your marginal rate. Compare that against a Treasury or municipal alternative, which are taxed differently.

Exemples

Exemples chiffrés

Des chiffres réels, calculés de bout en bout — pour que vous puissiez vérifier le calculateur avec vos propres montants.

An 18-month CD, shown as term yield, annual yield and after-tax yield

Données saisies

Deposit
$50,000
Rate
4.10% nominal, compounded daily
Term
18 months
Marginal tax rate
24%

Résultat

Interest earned
$3,171.34
Total yield over the term
6.343%
Annualised yield (APY)
4.185%
After-tax yield
≈ 3.181%

The three figures describe the same CD and differ by more than three percentage points. Quoting the 6.343% makes the CD look better than a one-year account paying 4.30%; annualising shows it is slightly worse. Always compare annualised.

Two offers on different terms, made comparable by annualising

Données saisies

Offer A
$50,000, 7-month promo at 4.60% APY
Offer B
$50,000, 18-month at 4.10% nominal

Résultat

Offer A — interest
$1,329.08
Offer A — annualised yield
4.600%
Offer B — interest
$3,171.34
Offer B — annualised yield
4.185%

Offer B pays more than twice the dollars, and is the worse rate. That is the whole reason annualised yield exists. Offer A wins on yield but leaves you re-investing after seven months at whatever rate exists then — the trade-off the annualised figure cannot show you.

Méthodologie

Exactitude et hypothèses

Tout calculateur repose sur des hypothèses. Voici les nôtres, énoncées clairement, pour que vous sachiez exactement ce que les chiffres prennent en compte et ce qu'ils ignorent.

  • The after-tax figure applies a single flat marginal rate to all the interest. Real returns straddle brackets, and state income tax is on top of federal.

  • Yield is calculated on the opening deposit. If you add to the CD, or if the bank pays interest out rather than compounding it, the yield on your average balance differs.

  • The rate is fixed and the CD is held to maturity. An early withdrawal penalty can push the realised yield below zero on a short holding period.

  • No fee is assumed. Maintenance fees on a CD are rare but not extinct, and they come straight off the yield.

Les conventions suivent la Regulation DD (12 CFR 1030), qui encadre la façon dont les établissements américains communiquent l'APY des comptes de dépôt. Les dépôts effectués auprès d'établissements assurés sont protégés par la FDIC jusqu'à $250,000 par déposant, par banque et par catégorie de propriété.

Sources primaires

D'où viennent ces règles

Les conventions que suit ce calculateur sont fixées par les régulateurs, pas par nous. Chacune renvoie à l'organisme émetteur afin que vous puissiez la vérifier plutôt que de nous croire sur parole.

Détails

Points clés et règles à connaître

Des faits à parcourir rapidement, à connaître avant d'ouvrir ou de renouveler un CD.

  • Yield and rate are not synonyms. The rate is what the bank applies; the yield is what you end up with after compounding, term length and — if you count it — tax.

  • CD interest is taxed as ordinary income in the year it is credited, reported on Form 1099-INT. On a multi-year CD you owe tax annually even though you cannot touch the money until maturity, which is a genuine cash-flow consideration on long terms.

  • Comparing a CD against a Treasury bill needs the tax treatment included. T-bill interest is exempt from state and local income tax, so in a high-tax state a Treasury yielding slightly less than a CD can keep more.

  • "High-yield CD" is a marketing phrase with no regulatory definition. It usually signals an online bank with no branch network, which is a real cost advantage — but check the minimum deposit and whether the rate is promotional.

  • Credit unions call the payout a dividend rather than interest and quote a dividend rate alongside an APY. The APY is calculated the same way and remains the figure to compare.

Les liens entre les notions

Notions et calculateurs associés

Le CD Yield Calculator fonctionne de pair avec ces outils associés. Chacun traite en détail une partie du sujet des CD.

Cas d'usage

À qui s'adresse ce calculateur

  • Savers comparing terms that do not match

    A 7-month promo against an 18-month standard cannot be judged on interest earned. Annualise both here and the ranking often flips.

  • Anyone in a higher tax bracket

    At a 32% or 37% marginal rate the after-tax gap between a CD and a municipal bond fund narrows sharply. Knowing your after-tax yield is what makes that comparison honest.

  • Retirees living on interest

    Income planning runs on the yield you keep, not the yield advertised. Work from the after-tax figure and the monthly interest line when you build the budget.

Outils associés

Tous les calculateurs de CD

Neuf outils ciblés qui couvrent l'ensemble du sujet des certificats de dépôt.

FAQ

FAQ — CD Yield Calculator

Des réponses directes aux questions les plus posées sur ce calcul. Pour aller plus loin, consultez la FAQ générale.

  • Divide the interest earned by the amount deposited. A $50,000 CD paying $3,171.34 has a total yield of 6.343% over its term. To compare it with any other CD, annualise it: (A/P)^(1/t) − 1, which for an 18-month term gives 4.185% per year.

Sécurité et confidentialité

Vos chiffres ne quittent jamais votre navigateur

Chaque calcul de ce site s'exécute en JavaScript sur votre propre appareil. Il n'y a ni compte, ni appel serveur, ni mesure d'audience associée aux chiffres que vous saisissez.

  • Formules aux normes bancaires

    Utilise les mêmes conventions d'intérêts composés et d'APY que les banques soumises à la Regulation DD.

  • 100 % gratuit, sans connexion

    Aucune inscription, aucun mur d'e-mail, aucun paywall. Chaque calculateur est pleinement utilisable dès la première visite.

  • Vos données ne quittent jamais votre navigateur

    Chaque calcul s'exécute côté client en JavaScript. Rien n'est envoyé à un serveur ni conservé.

Diffusé en HTTPS, sans contenu mixte. Lisez notre politique de confidentialité ou consultez les formules et la méthodologie qui sous-tendent chaque chiffre.

See the yield you actually keep

Term yield, annualised yield and the after-tax figure, computed on your own deposit in your own browser.

Calculate My CD YieldRetour au CD Calculator