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CD Ladder Calculator

Plan a certificate of deposit ladder by splitting your savings across multiple CD terms. See exactly how much each rung earns, when each CD matures, and how much total interest your ladder generates — so you balance yield and liquidity at the same time.

Build your CD ladder

Enter your total savings, expected APY, number of rungs, and spacing between maturities. The calculator splits your deposit equally across all rungs and shows each rung's growth.

What this calculator assumes

Deposit is split equally across all rungs. Each rung uses the same APY with your chosen compounding frequency. Real bank rates vary by term.

When to use a CD ladder

When you want higher yields than a savings account but don't want to lock all your cash in one long-term CD. Each rung gives you periodic liquidity.

Tip: a 4-rung annual ladder gives you a CD maturing every year while still earning long-term rates on the later rungs. Roll each matured CD into a new long-term rung to keep the ladder going indefinitely.
This calculator is for educational and planning purposes only. Actual CD rates, terms, and early withdrawal penalties vary by institution. Verify rates directly with your bank or credit union before opening certificates.

What is a CD ladder?

A CD ladder is a savings strategy that splits a lump sum across multiple certificates of deposit with staggered maturity dates. Instead of locking all your money in one 5-year CD, you might put equal amounts in 1-year, 2-year, 3-year, and 4-year CDs.

As each CD matures, you reinvest it in a new long-term CD to keep the ladder rolling. This approach combines the higher yields of longer-term CDs with the flexibility of having some money become available each year.

CD ladder formula

Each rung is calculated using the compound interest formula:

Per-rung deposit = Total deposit ÷ Number of rungs
Future value per rung = Deposit × (1 + APY/n)^(n × years)
where n = compounding periods per year (1 = annual, 12 = monthly, 365 = daily)
Total ladder value = Sum of all rung future values
Total interest = Total ladder value − Original deposit

How to use this CD ladder calculator

  1. Enter the total amount you want to put into your ladder.
  2. Enter the average APY you expect across all rungs. Use current bank rates as a guide.
  3. Choose how many rungs — 4 or 5 is most common for annual ladders.
  4. Select the spacing between maturities — 1 year per rung is the classic structure.
  5. Choose your compounding frequency — monthly or daily compounding adds slightly more interest.
  6. Click Calculate Ladder to see the full breakdown per rung.

Example calculation

$10,000 split into a 4-rung ladder at 4.5% APY, 1 year spacing, annual compounding:

Per-rung deposit: $10,000 ÷ 4 = $2,500 each
Rung 1 (1 yr): $2,500 × 1.045¹ = $2,612.50 (+$112.50)
Rung 2 (2 yr): $2,500 × 1.045² = $2,730.06 (+$230.06)
Rung 3 (3 yr): $2,500 × 1.045³ = $2,852.91 (+$352.91)
Rung 4 (4 yr): $2,500 × 1.045⁴ = $2,981.29 (+$481.29)
Total: $11,176.76 — Interest earned: $1,176.76

CD ladder vs single CD

The main trade-off is between yield and access. A single 4-year CD might offer a slightly higher rate, but all your money is locked up. A ladder of equal total duration earns a blended rate that is lower than the longest term alone — but gives you liquidity every year when a rung matures.

For most savers, the liquidity benefit outweighs the small yield difference, especially in uncertain environments where rates are changing or expenses might arise.

Frequently asked questions

What is a CD ladder and why is it useful?

A CD ladder splits savings across multiple CDs with staggered maturities. It lets you earn higher long-term rates while still having some money become available on a regular schedule — giving you both yield and liquidity.

How many rungs should my CD ladder have?

4 or 5 rungs is the most common setup for an annual ladder. More rungs mean smaller per-rung deposits and more frequent maturities. Fewer rungs mean larger deposits per CD and less frequent access. Choose based on how often you want liquidity events.

Should I use the same APY for all rungs?

Real CD rates typically vary by term — longer CDs usually offer higher rates. This calculator uses one average APY for simplicity. For a more precise estimate, calculate each rung separately using the actual rate for each term.

What happens when a CD matures in a ladder?

When a rung matures, you have the choice to spend it, reinvest in a new long-term CD to extend the ladder, or move it somewhere else. Rolling each matured CD into the longest rung of your original schedule keeps the ladder going indefinitely.

Are CD ladders FDIC insured?

Individual CDs at FDIC-member banks are insured up to $250,000 per depositor per institution. If your ladder total exceeds $250,000 at one bank, consider spreading rungs across multiple institutions to stay within coverage limits.

Related finance calculators

These tools pair naturally with CD ladder planning.

Blended Interest Rate Calculator Calculate a weighted average rate across multiple CDs with different APYs and balances. Money Market Account Calculator Compare a CD ladder return against a liquid money market account over the same period. Basis Points Calculator Understand rate differences between CD terms — e.g. how much 25 bps extra APY adds up to. Debt Snowball Calculator If you carry debt, compare the interest you'd earn in a CD ladder against the cost of that debt.

Disclaimer

This CD ladder calculator is for educational and planning purposes only. It uses simplified assumptions (equal allocation, uniform APY) that may not reflect real-world CD products. Actual rates, terms, minimum deposits, and early withdrawal penalties vary by institution. Verify all details directly with your bank or credit union before opening certificates of deposit.