Introduction
A certificate of deposit (CD) is a type of savings account that pays you a fixed interest rate for a set period of time. You put money in, leave it there, and earn more than a regular savings account. Our CD calculator helps you figure out how much your money will grow by the time your CD matures. Just enter your deposit amount, interest rate, term length, and how often interest compounds. You can also add your tax rate to see what you keep after taxes. The calculator shows your total interest earned, your final balance, and a full year-by-year breakdown with charts so you can see exactly how your savings grow over time.
How to Use Our CD Calculator
Enter your CD details below to find out how much money you will have when your CD matures. The calculator shows your total interest earned, effective APY, and a year-by-year breakdown of your balance growth.
Initial Deposit: Type the amount of money you plan to put into the CD. This is the starting balance that will earn interest.
Annual Interest Rate (%): Enter the yearly interest rate your bank offers on the CD. This is also called the APR. If you want to understand the difference between APR and APY in more detail, try our APR Calculator or APY Calculator.
CD Term: Set how long you will keep your money in the CD. Enter the number of years and any extra months between 0 and 11.
Compounding Frequency: Pick how often the bank adds interest to your balance. Common choices are daily, monthly, quarterly, semiannually, annually, or continuously. More frequent compounding means you earn slightly more interest. To explore how compounding works with different contribution strategies, check out our Compound Interest Calculator.
Marginal Tax Rate (%): Enter your tax rate if you want to see how taxes affect your earnings. Leave it at 0% if you do not want to include taxes in the results. You can use our Tax Bracket Calculator to determine your marginal rate.
Click Calculate to see your results. Click Reset to go back to the default values and start over.
What Is a CD Calculator?
A CD calculator helps you figure out how much money you will earn from a certificate of deposit. A CD is a type of savings account where you put in a fixed amount of money and leave it there for a set period of time. In return, the bank pays you a guaranteed interest rate that is usually higher than a regular savings account. The catch is you cannot take your money out early without paying a penalty.
How Does a CD Work?
When you open a CD, you agree to three main things: how much money you deposit, the interest rate, and how long you will keep it there (called the term). Terms can range from a few months to several years. During that time, your money earns interest. That interest can compound, which means you earn interest on your interest. The more often it compounds — daily, monthly, or quarterly — the more money you earn by the end. If you are curious how quickly your money doubles at a given rate, the Rule of 72 Calculator gives you a quick estimate.
APR vs. APY
The APR (annual percentage rate) is the basic interest rate the bank gives you. The APY (annual percentage yield) is the real amount you earn after compounding is factored in. The APY is always equal to or higher than the APR. When comparing CDs, always look at the APY to get a true picture of your earnings. Our APY Calculator can help you convert between APR and APY for any compounding frequency.
Do You Pay Taxes on CD Interest?
Yes. The interest you earn from a CD counts as taxable income. The IRS requires you to report it on your tax return each year. How much tax you owe depends on your marginal tax rate. This calculator lets you enter your tax rate so you can see your actual take-home earnings after taxes. If you need help figuring out your effective tax rate, our Tax Bracket Calculator and Capital Gains Tax Calculator can be useful resources.
Are CDs a Good Investment?
CDs are one of the safest places to put your money. They are insured by the FDIC up to $250,000 per depositor, per bank. They work best when you have money you know you will not need for a while and you want a guaranteed return. However, because they lock up your funds, they are not ideal for emergency savings. If interest rates rise after you open a CD, you are stuck with the lower rate until your term ends. For money you might need on shorter notice, a regular Savings Calculator can help you plan. If you are building a broader financial plan, consider using our Investment Calculator to compare CD returns against other options, or our Future Value Calculator to project lump-sum growth. You might also want to set aside liquid funds in an Emergency Fund Calculator before locking money into a CD. For long-term goals like retirement, tools like the Retirement Calculator, 401k Calculator, and Roth IRA Calculator can help you see where CDs fit into your overall strategy. If you prefer simple, predictable returns without compounding, our Simple Interest Calculator shows you the difference. And to understand how inflation erodes your CD earnings over time, check out the Inflation Calculator.