CD Ladder
Calculator

What Is a CD Ladder?

A CD ladder calculator helps you plan a certificate of deposit strategy where one pool of money is divided across several CDs with different maturity dates. Instead of placing every dollar into one long-term CD, you create a series of rungs. One CD may mature in one year, another in two years, another in three years, and so on. This creates scheduled access to cash while still giving part of your balance the chance to earn longer-term CD rates.

The common five rung CD ladder uses one, two, three, four, and five year CDs. When the one year CD matures, you can withdraw the cash or reinvest it into a new five year CD. Over time, that structure can turn into a ladder where each rung is a longer-term CD, but one rung matures every year. A shorter ladder can use 3, 6, 9, and 12 month CDs when liquidity matters more than locking in the longest possible rate.

When a Ladder CD Calculator Is Useful

Use this ladder CD calculator when you want to compare liquidity, interest, and reinvestment timing in one view. It is especially useful if you are deciding between a single high-yield CD and a staggered set of CDs. A single five year CD may show more interest in a simple calculator, but it can lock up all of your funds. A ladder makes part of the balance available on a schedule, which can reduce the pressure to break a CD early.

The calculator is also helpful for emergency savings that you do not need every day but do not want fully tied up for five years. It shows the estimated maturity value for each rung and the total interest across the ladder. For a basic single-CD projection, use the normal CD calculator. To compare 3 to 24 month maturities without a multi-rung plan, use the short-term CD calculator.

Example: $25,000 Five Year CD Ladder

Suppose you place $25,000 into a five rung ladder. The calculator divides the balance into five $5,000 CDs. The first rung matures after one year, the second after two years, and the fifth after five years. If the blended APY is 4.50% with monthly compounding, the shorter rungs earn less total interest because they are invested for fewer months, while the longer rungs earn more. The tradeoff is that one part of your savings becomes available each year.

After the first CD matures, you can spend it, move it to savings, or reinvest it into a new five year CD. Reinvesting keeps the ladder alive. If rates are higher at that time, the new rung can capture the higher yield. If rates are lower, only one rung is affected instead of the entire original balance.

Limits and Assumptions

This certificate of deposit ladder calculator is for planning and education. It assumes equal deposits per rung and does not include taxes, bank fees, brokered CD markups, call risk, or early withdrawal penalties. It also uses one blended APY for a quick estimate, while real ladders often use different APYs for each term. Always compare current CD rates directly with banks, credit unions, or brokered CD platforms before opening accounts.