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To use our CD calculator, enter the amount you plan to deposit into a certificate of deposit (CD). Next, provide the annual percentage yield (APY): the interest rate your CD earns, including compounding effects. Finally, choose how long you'll keep your money in the CD.
The calculator displays your total interest earned and final balance when your CD matures.
Change your deposit amount or APY to compare different CDs. Use these projections to choose the right CD for your savings timeline.
Your deposit amount determines your total interest earned. A $10,000 deposit earns substantially more than $1,000 over the same term because interest compounds on a larger base.
Deposit only money you won't need before maturity. Early withdrawals trigger penalties (three to six months of interest) that cut into your earnings. For quicker access to your money, choose a shorter term.
Annual percentage yield (APY) represents your CD's interest rate, including compounding. A 0.5% APY difference adds up fast: on a $10,000 deposit, a 5-year CD at 4.5% earns hundreds more than one at 4%.
CD rates between 4% and 5% are currently competitive for longer terms. Compare APYs from at least three banks or credit unions before you open a CD.
Choose monthly or yearly views. Monthly breakdowns are useful for shorter CDs or detailed planning. For multi-year CDs, the yearly view makes the compounding effect easier to track.
Your CD term locks in your money for a set period, from three months to five years. Banks pay higher rates on longer terms because you're committing funds for longer. A 12-month CD pays less. You get your money back sooner.
Match your term to your timeline. If you're saving for a house down payment in 18 months, an 18-month CD is the right fit. For longer-term goals, a 5-year CD pays more, and you can roll it over when it matures.
The calculator shows two numbers: total interest earned and your final balance at maturity. Your final balance is your original deposit plus all accumulated interest.
You'll also see a graph of how your balance grows over time. The curve steepens as compounding builds, most noticeably in longer-term CDs. Use the monthly or yearly breakdown to decide your next step. Reinvest at maturity, or put the funds toward something you're already saving for.
A $5,000 deposit at 4.5% APY for three years earns $706 in interest, for a final balance of $5,706.
You earn $225 in the first year and your total reaches $5,225. By year two, cumulative interest reaches $460. Your balance sits at $5,460.
At five years, total interest reaches $1,231. The balance comes to $6,231.
CDs offer a secure way to grow your savings. Federal deposit insurance backs your money, and a fixed APY locks in your return from day one. No monitoring, no decisions, just growth. CDs are the right fit for conservative savers who want a hands-off investment.
CDs are among the safest places to store your money. The FDIC insures bank deposits, and the NCUA insures credit union deposits up to $250,000 per account holder per institution. For balances above those limits, spread deposits across multiple institutions. Your savings stay covered even if a bank fails.
Unlike volatile investments like stocks, CDs offer predictable growth through a fixed APY. From the moment you open a CD, you know exactly how much interest your deposit will earn and what your total balance will be at term's end. Conservative investors and anyone saving toward a fixed date get the most out of a predictable rate.
CDs are a set-it-and-forget-it investment. Once you deposit your money and the term begins, you don't need to actively monitor or manage your account. This hands-off approach appeals to people who prefer a passive investment option.
Early withdrawals trigger penalties: three to six months of interest. If you withdraw before earning enough interest to cover the penalty, you'll lose part of your original deposit. Check your CD's penalty terms before withdrawing; penalties vary by bank and CD term length.
CDs lock in your rate for a set term. If you need access to your money sooner, or want the possibility of higher returns, these alternatives are worth a look. Savings accounts, money market accounts and high-yield savings accounts let you withdraw money anytime. Bonds and Treasury securities offer comparable safety with different time horizons.
Savings accounts have no withdrawal restrictions, so they're the right fit for emergency funds or cash you may need within a year. Rates run lower than CDs at 0.5% to 1% APY.
Money market accounts earn 1% to 2% more than regular savings accounts, and many include check-writing or debit card access. Most require minimum balances between $1,000 and $10,000.
High-yield savings accounts at many online banks pay 4% to 5% APY with no withdrawal penalties. The rate isn't locked in the way a CD's is; it adjusts with market conditions.
Treasury bonds and notes offer government-backed safety with terms from four weeks to 30 years. Corporate bonds from stable companies pay higher rates, with a bit more risk than Treasuries. Unlike CDs, both bond types trade on secondary markets, so you can sell before maturity if needed.
CD laddering splits your money across CDs with different maturity dates, so a portion matures at regular intervals. When rates climb, the shorter-term CDs free up cash to reinvest at the new rate. The longer-term portions keep earning at the rate you locked in.
Split your deposit into multiple CDs with staggered maturity dates, a strategy called CD laddering. For example, instead of committing all your funds to a single five-year term, allocate equal portions to one-year, three-year and five-year CDs. This strategy gives you regular access to portions of your funds while still benefiting from the higher returns of longer terms. As each CD matures, reinvest the balance into a new long-term CD to maintain the ladder and enhance returns over time.
Roll a maturing CD into a new one if rates have climbed since you last opened. You lock in the better rate with no gap in your earnings. Many financial institutions allow automatic reinvestment, but review available options before committing. Compare current CD rates at maturity to find the best rate.
Bump-up CDs let you raise your rate once if market rates climb. No-penalty CDs drop the early withdrawal fee, so you're not locked in if your plans change. Callable CDs often offer higher rates upfront but come with the possibility of the bank terminating the CD early. Match the type to your situation. Bump-up CDs make sense if you think rates will rise. Go with no-penalty CDs if you might need early access. Callable CDs pay the highest upfront rate, but the bank can end the term early.
If your CD earns 4% and inflation runs at 3%, your real return is only 1%. On a five-year CD, that gap compounds and your purchasing power takes a larger hit.
CD interest counts as taxable income. If you're in the 22% tax bracket, a 4% CD return becomes 3.12% after taxes. Holding CDs in an IRA or Roth IRA cuts that tax drag, so more of your interest stays in your pocket.
CD earnings from compounding depend on three variables: your deposit, APY and term length. Each year, your balance earns interest on itself (not just the original deposit), which is how returns accelerate over time.
You can calculate CD interest using this formula:
Here, A represents the total amount, which includes both the principal and the interest earned. P is the principal or initial deposit, and r is the APY expressed as a decimal. The variable n represents the number of compounding periods per year, and t represents the time in years.
Each variable affects your final balance: a higher r or longer t compounds more interest over time.
A $10,000 CD earning 4.5% APY pays about $450 in interest after one year. The actual amount depends on your rate, so plug your APY into the calculator to get a precise figure.
7% APYs aren't common today. Competitive rates run between 4% and 5%, depending on the institution and term. For anything higher, check promotional offers or specialty CDs before you commit.
At 4.5% APY, a $500 five-year CD earns $123 in interest. That brings the total balance to $623.
A one-year CD is a solid choice for short-term savings goals. At 4.5% APY, $15,000 earns $675 in interest with no exposure to market swings. Your principal and rate are both locked in from day one.
About Nathan Paulus
Nathan Paulus is Head of Content and SEO at MoneyGeek, where he leads content strategy and produces original data research across insurance, consumer costs, transportation safety, housing, public policy, and personal finance. He also reviews published studies for methodology, source quality and factual accuracy before they reach readers.
Research and Analysis
In nearly six years at MoneyGeek, Paulus has published more than 100 original studies and explanatory guides. His insurance research includes 50-state comparisons of health care outcomes, costs and access; an analysis of how uninsured rates track with state Medicaid expansion decisions and electoral patterns; full-coverage auto rate analyses across major insurers in all 50 states; and a study of how premium trends track with industry underwriting losses, with combined ratio data sourced from Fitch Ratings, AM Best and Bureau of Labor Statistics CPI figures. His research also covers vehicle pricing trends across the U.S. new car market, summer traffic fatality rates by state, homeowner underinsurance ratios using mortgage and policy data, and housing affordability across all 50 states.
His research has been cited by Bloomberg, the Los Angeles Times, Forbes, Fast Company, the San Francisco Chronicle, USA Today and NBC Los Angeles. Harvard, MIT, Stanford and Yale have also referenced his work.
Career
Growing up, Paulus developed an early interest in personal finance through his grandmother, who emphasized saving over earning as the foundation of financial stability. Her framing still shows up in how he writes about money for people without a financial background.
Paulus joined MoneyGeek in July 2020 as Director of Content Marketing. In that role, he led the content team and directed data journalism production across insurance and personal finance verticals. He was promoted to Head of Marketing and Communications in December 2023, where he took on digital PR and communications strategy. He has held his current role as Head of Content and SEO since January 2025.
Before MoneyGeek, he served as Director of Content Marketing and SEO at Ventrix Advertising. There, he helped build two content sites from scratch, contributed to link-building programs that secured more than 1,500 unique referring domains within a year, and co-managed a marketing team of more than 20 people. Earlier, he spent two and a half years at ABUV Media, moving up from Marketing Research Analyst to Senior Marketing Tactics Analyst, where he built his grounding in audience research, content strategy and SEO.
