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APY you type, not a quote

CD Calculator

Ending balance and interest on a certificate of deposit from the APY you enter. Not a live bank offer.

Your numbers

Certificate of deposit

Growth from the APY you type. Not a live bank rate.
$
%Annual percentage yield
years

Ending balance

$10,500.00$500.00 interest
How we got this
  1. Principal$10,000.00
  2. APYAnnual percentage yield you entered, not a live bank quote5%
  3. Interest earned$500.00
What we assumed
  • The rate is APY. Ending value is principal × (1 + APY)^years, including partial years.
  • This is not a live CD offer, early-withdrawal penalty model, or tax estimate.
  • Bank compounding display is unnecessary once APY is the input: APY already includes compounding.
Technical details

Method cd-v1.0.0Data Manual inputs / fixed rules

Guide

Certificate of deposit math from the APY you type

CostAnswer editorialIndependent calculator publisher

The ending balance uses the APY you enter for the term you enter. It is not a live bank offer, not a brokered-CD quote, and not a comparison of early-withdrawal penalties.

APY already includes compounding

Banks publish APY so you do not have to guess compounding. This page applies that APY over the term. If you type a promotional APY that only lasts three months, do not run it for five years.

Questions about this calculator

Where are today’s CD rates?

Not on this page. Type a rate from a bank or a comparison site. CostAnswer does not fetch live offers.

What if I withdraw early?

Penalties are not modeled. The ending balance assumes you hold to term.

Terms used here

APY
Annual percentage yield. The rate this page applies.
Term
How long the CD is assumed to stay open.

Practical tips

  • Compare APYs for the same term. A 6-month APY is not a 5-year APY.
  • Treasuries and high-yield savings are different products; this page will not rank them.

Limits and caveats

  • Projection from your APY. Not an FDIC lookup and not investment advice.

Results are for information. They are not legal, tax, medical, or financial advice. How the math is maintained · Report a wrong figure.

Engine notes

Rounding, versioning, and omissions that sit beside the guide rather than repeating it.

  • APY input. The rate is annual percentage yield. Ending balance = principal × (1 + APY)^years, including fractional years.
  • One-year fixture. $10,000 at 5% APY for 12 months is $10,500 under that definition.
  • Why not a compounding picker. APY already includes the issuer’s compounding. Mixing a nominal rate with APY would silently change the math.

Calculation receipt

What each number here is

This answer is arithmetic on what you enter. No outside dataset is involved, so nothing here can go out of date.

A CD projection is compounding at the rate you were quoted.

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