How does the calculator value a CD ladder?
First it divides the total by the number of rungs, so $50,000 across five rungs puts $10,000 in each CD. The first rung gets the shortest term you enter, and each later rung is one year longer.
Next it assigns rates. The shortest rung gets the shortest-term rate, and each additional year adds the rate increase you set. That models the common pattern of longer CDs paying more, without requiring you to type in every rate.
Finally each rung grows with annual compounding for its own term, and the results are added together. Total interest is that sum minus the amount invested, and the average rate is the simple average of the rung rates.
Per-CD amount = Total ÷ k Rate for rung j = r1 + (j − 1) × s Term for rung j = T1 + (j − 1) years Rung value = Per-CD amount × (1 + rate)^term Total at full maturity = sum of all rung values
- k
- number of rungs (CDs)
- j
- rung number, 1 for the shortest
- r1
- rate on the shortest CD
- s
- rate increase per extra year of term
- T1
- term of the shortest CD in years
Example: a five-rung ladder with $50,000
Scenario: Priya and Sam want to keep $50,000 safe but have some of it available each year. They build five rungs from one to five years, starting at an illustrative 3.80% with each extra year adding 0.15 points.
- Per-CD amount$50,000 ÷ 5 = $10,000 in each CD
- Rates by rung1 yr 3.80%, 2 yr 3.95%, 3 yr 4.10%, 4 yr 4.25%, 5 yr 4.40%
- Shortest and longest rungs$10,000 × 1.038 = $10,380.00; $10,000 × 1.044^5 = $12,402.31
- Total at full maturity$10,380.00 + $10,805.60 + $11,281.12 + $11,811.48 + $12,402.31 = $56,680.51
- Total interest$56,680.51 − $50,000 = $6,680.51
- Average rate(3.80 + 3.95 + 4.10 + 4.25 + 4.40) ÷ 5 = 4.10%
The ladder would return $56,680.51 in total, $6,680.51 of interest, with the first $10,380.00 available after one year.
The calculator holds each rung once to maturity; reinvesting matured rungs at future rates would change the long-run total.
Who gets the most out of a CD ladder?
Savers who want yearly access
If you might need part of the money in any given year but do not want it all in a low-rate account, a ladder releases a slice every year without a penalty.
People unsure where rates are heading
A ladder avoids betting everything on one renewal date. If rates rise, the next maturing rung can capture them; if they fall, the longer rungs keep their locked rates.
Retirees drawing a predictable income
Matching rung maturities to planned spending can provide a known amount on a known date. The calculator shows how much each rung will be worth when it comes due.
Anyone splitting deposits for insurance
Rungs can sit at different insured institutions, which can help keep each bank's total under the $250,000 per depositor, per ownership category limit.
What are common CD ladder mistakes?
Letting rungs renew on autopilot
Most CDs renew automatically for the same term if you do nothing. In a ladder, a one-year rung that renews for one year breaks the pattern; you usually want to roll it into the longest term.
Comparing the ladder with a five-year CD only
One five-year CD would earn more on paper, but it gives no access for five years. Compare the ladder's interest with what flexibility is worth to you, not just with the top rate.
Using too many tiny rungs
More rungs mean more frequent access but smaller amounts in each, and some CDs have minimum deposits. Ten rungs of $1,000 may be more paperwork than benefit.
Assuming rates always rise with term
Sometimes short CDs pay as much as or more than long ones. Set the rate increase to zero or a negative number to see how the ladder looks when the curve is flat or inverted.
Forgetting annual tax on each rung
Interest on every rung is generally taxable as it is credited, even on rungs that will not mature for years. A ladder creates a tax item each year, not only when a CD matures.
What does a ladder earn compared with all-short or all-long?
A ladder lands between the two extremes on interest and wins on access. Putting Priya and Sam's $50,000 into the five-year CD at 4.40% would grow to $62,011.54, about $5,331 more than the ladder, but none of it would be reachable without a penalty for five years.
Keeping all of it in the one-year CD at 3.80% gives full access in a year and $1,900.00 of interest, after which everything must be reinvested at whatever rate exists then. The ladder trades some yield for a steady release of cash and a spread-out renewal schedule.
| Rung | Term | Rate | Value at maturity | Interest |
|---|---|---|---|---|
| 1 | 1 year | 3.80% | $10,380.00 | $380.00 |
| 2 | 2 years | 3.95% | $10,805.60 | $805.60 |
| 3 | 3 years | 4.10% | $11,281.12 | $1,281.12 |
| 4 | 4 years | 4.25% | $11,811.48 | $1,811.48 |
| 5 | 5 years | 4.40% | $12,402.31 | $2,402.31 |
| Total | 4.10% avg | $56,680.51 | $6,680.51 |
What happens after the first rung matures?
In a classic ladder, the money from the maturing one-year CD is moved into a new five-year CD. After four more years of doing the same, every rung is a five-year CD, yet one still matures each year. That is how a ladder eventually earns long-term rates on all of its money while keeping yearly access.
This calculator does not model those future reinvestments because no one knows what rates will be offered then. Treat its total as the value of the ladder you are building today.
Terms used on this page
- CD Ladder
- A CD ladder spreads savings across several certificates of deposit with staggered maturity dates, such as one, two, three, four and five years. As each CD matures, you can use the cash or reinvest it at the longest rung. The ladder gives you regular access to part of your money while still capturing longer-term rates.
- Certificate of Deposit (CD)
- A certificate of deposit is a savings account that pays a fixed rate for a set term, such as six months or five years, in exchange for leaving your money untouched until it matures. CDs at insured banks and credit unions are covered by federal deposit insurance up to the limit, and early withdrawals usually trigger a penalty.
- Early Withdrawal Penalty
- An early withdrawal penalty is a charge for taking money out of a certificate of deposit before it matures. It is usually expressed as a number of days' or months' worth of interest, such as 90 days or six months. If you have not yet earned enough interest, the penalty can reduce your original deposit.
- Deposit Insurance
- Deposit insurance is federal protection for money held at insured banks and credit unions. The FDIC covers bank deposits and the NCUA covers credit union shares, each up to $250,000 per depositor, per insured institution, per ownership category. If an insured institution fails, covered deposits are repaid, including interest accrued up to the limit.
- Interest Rate
- An interest rate is the price of money, stated as a percentage of the balance per year. Borrowers pay it to lenders, and savers earn it from banks. The rate alone does not include fees or compounding, so it can understate the true yearly cost of a loan or overstate a simple comparison of savings accounts.
CD Ladder Calculator: common questions
How many rungs should a CD ladder have?
Many ladders use three to five rungs, but the right number depends on how often you want access and how much you have. Five one-year-apart rungs give access every year. More rungs mean smaller amounts each time and more accounts to track. Check minimum deposit requirements, since splitting a modest sum too finely can fall below them.
Is a CD ladder better than a high-yield savings account?
Neither is better in every case; they solve different problems. A savings account lets you withdraw any time but its rate can change. A ladder locks in rates on most of the money and gives scheduled access to part of it. Some savers keep an emergency cushion in savings and ladder money they will not need on short notice.
Do I lose money if I need cash before a rung matures?
You would usually pay an early-withdrawal penalty on the rung you break, which can reduce interest and sometimes principal. That is the risk a ladder is designed to reduce: with one rung maturing each year, you can often wait for the next one instead of breaking a CD. Only the rung you cash out is penalized.
Can I build a CD ladder at more than one bank?
Yes, a ladder's rungs can sit at different banks and credit unions. That lets you pick the best rate for each term and can keep each institution's total within deposit insurance limits. The trade-off is more accounts, maturity dates and tax forms to keep track of. A simple spreadsheet listing each rung, its bank and its maturity date makes the ladder easier to manage.
What rate increase per year should I enter?
Use the actual difference between the CD rates you are quoted. If a one-year CD pays 3.60% and a five-year pays 4.20%, the increase is 0.15 points per year. If longer CDs pay the same or less, enter zero or a negative value; the calculator will show how much less a ladder earns when the curve is flat.
Why is the ladder's average rate lower than the longest CD rate?
The average includes the shorter rungs, which pay less. With rungs from 3.80% to 4.40%, the simple average is 4.10%. As each short rung matures and is reinvested at the longest term, the average moves toward the long-term rate, which is the payoff for building the ladder. Until then, the lower average is the price of having money come due every year.
Does a CD ladder protect against falling rates?
Partly. The longer rungs keep their locked rates for years, so a drop in rates only affects the rung that renews that year. You still reinvest at lower rates over time, but more gradually than if all your money matured at once. Rising rates work the same way in reverse.
What does the first CD matures result mean?
It is how long until the shortest rung comes due and its money becomes available without a penalty. It equals the shortest term you entered. After that, one rung matures each year until the longest one, so the first maturity date also marks the start of your yearly access schedule.
Is the total at full maturity the balance on one date?
No, it adds up each rung's value on its own maturity date. The one-year rung's value is reached after one year, the five-year rung's after five. The figure tells you the total you will have received from this ladder once every rung has paid out, assuming nothing is withdrawn early.
Sources
- Certificates of deposit (CDs) — U.S. Securities and Exchange Commission (Investor.gov). Accessed October 17, 2026.
- Deposit Insurance — Federal Deposit Insurance Corporation. Accessed October 17, 2026.
- Share Insurance Coverage — National Credit Union Administration. Accessed October 17, 2026.
- Topic no. 403, Interest received — Internal Revenue Service. Accessed October 17, 2026.
We cite primary sources: regulators, central-bank data and federal agencies. Worked examples on this page are our own calculations, last checked October 17, 2026. See our methodology.