Do I have to split deposits equally?

This tool assumes equal splits for simplicity. Adjust rungs/rates or run multiple scenarios for uneven splits.

Can I add more than four rungs?

Set rungs to your desired count and fill rates in order. (Interface currently shows four inputs—extend as needed.)

Does this include compounding differences?

No. It uses APY as provided. Actual compounding is reflected inside APY from banks.

Penalties for early withdrawal?

Not included. Avoid early withdrawals to preserve yield; check your bank’s penalty rules.

How do I maintain the ladder?

When a rung matures, roll it into a new longest-term CD to keep maturities staggered and yield higher.

finance calculator

CD Ladder Calculator

Model a simple CD ladder with equal deposits across rungs to see how much goes into each CD, what the blended yield looks like, and how staggering maturities affects your cash and returns.

Results

Deposit per rung: $5,000
Weighted average yield: 4.67%

Overview

A CD ladder is a way to spread your cash across multiple maturities so that part of your money comes due regularly while the rest stays locked into higher long-term yields. Instead of guessing what that ladder really earns, this calculator splits your total deposit equally across rungs, applies each rung’s rate, and shows both the per‑rung deposit and the blended, weighted average yield for the entire ladder.

That makes it easier to answer questions like “Is this 1–4 year ladder meaningfully better than just putting everything into a 1‑year CD?” or “What happens to my average yield if I add a longer, higher‑rate rung?” You can quickly experiment with different rung counts and rate combinations to find a ladder structure that balances liquidity and return for your situation.

In practice, many savers like the idea of laddering but struggle to visualize the trade‑offs. Shorter rungs give you frequent access to maturing cash at the cost of lower rates, while longer rungs lock up funds in exchange for higher yields. This tool turns those trade‑offs into concrete numbers so you can design a ladder that matches your comfort level around both access and return instead of relying on generic examples from bank brochures.

How to use this calculator

Enter the total amount of cash you want to allocate to CDs across the ladder.
Enter the number of rungs (CDs) you plan to use. In this simplified tool, the deposit is split equally across all rungs.
Enter the rate (APY) for each rung, typically from shortest term to longest term. Use rates for CD terms that match the ladder design you have in mind.
Review the calculated deposit per rung and the weighted average ladder yield.
Compare the blended yield to the rate you could get by putting all the money into a single-term CD, and decide whether the balance of yield and liquidity fits your plan.

Inputs explained

Total deposit: The total amount of cash you want to spread across your CD ladder. This amount will be split equally into each rung in this simplified model.
Number of rungs: The number of separate CDs (maturities) in the ladder. Common ladders use three to five rungs—for example, 3‑month, 6‑month, 12‑month, and 24‑month terms.
Rung rates: The interest rate or APY for each rung in the ladder, entered as a percentage. Use the quoted APY for each term from your bank or brokerage, ordered from shortest to longest term.

How it works

First, we divide your total deposit amount by the number of rungs you specify to calculate an equal deposit share for each rung in the ladder.

Next, we multiply that per‑rung deposit by each rung’s interest rate (typically APY) to understand how much interest each rung would generate over a comparable period.

We then compute the weighted average yield by summing the per‑rung deposit × rate products and dividing by your total deposit. Because each rung has the same deposit in this simplified model, the weighted average is essentially the arithmetic average of the rung rates.

The result is a blended yield that you can compare to the yield on a single CD term to decide whether laddering is worth the complexity given your liquidity needs.

Because deposits are equal in this model, each rung contributes the same weight to the blended yield; if you later move to uneven rungs in a spreadsheet, you can treat this calculator as a clean, easy‑to‑understand baseline.

Formula

Rung share = Total deposit ÷ Number of rungs
Weighted yield = Σ(rung share × rate) ÷ Total deposit

With equal deposits, weighted yield is effectively the average of the rung rates.

When to use it

Comparing the blended yield of a multi‑rung ladder to the yield on a single-term CD when deciding how to park cash you may need gradually over time.
Planning liquidity so that one CD matures at regular intervals (for example, every three or six months) while still capturing higher yields on longer maturities.
Testing how much additional yield you pick up by adding a longer‑term rung when the yield curve is steep, or how flat curves reduce the benefit of laddering.
Illustrating to clients or family members why diversifying CD maturities can reduce reinvestment risk and provide more flexibility than locking everything into a single term.
Exploring how a CD ladder might complement a high-yield savings account or money market fund as part of a tiered emergency fund strategy.
Evaluating trade‑offs between staying liquid in a rising-rate environment versus locking in today’s yields if you expect rates to fall in the future.

Tips & cautions

Pick rungs that mature at intervals aligned with your cash needs—for example, monthly, quarterly, or annually—so you do not have to break CDs early.
Once the ladder is built, you can maintain it by rolling each maturing rung into a new longest‑term CD, keeping the ladder length constant while refreshing rates.
Use current APYs from your bank, credit union, or brokerage for each term; small rate differences can change the blended yield meaningfully, especially with many rungs.
Consider putting more rungs at terms where yields are materially higher, even if this simple calculator assumes equal deposits. You can approximate uneven splits by running multiple scenarios.
Remember that CD ladders in tax‑advantaged accounts are impacted differently by taxes than ladders in taxable accounts; here we focus on yield, not after‑tax return.
Document your ladder plan—maturity dates, terms, and renewal instructions—so you don’t lose track of when cash becomes available or accidentally let rungs auto‑renew into terms you no longer want.
Check early withdrawal penalties and minimum balance rules before committing to a ladder—breaking CDs frequently can erase much of the yield advantage.
If you are building a ladder inside an IRA or other tax‑advantaged account, focus on the yield and maturity structure; in taxable accounts, compare after‑tax returns to alternatives like Treasuries, bond funds, or high-yield savings.
Assumes equal deposits across all rungs. Real‑world ladders may allocate more to certain maturities based on your liquidity needs or rate views.
Does not model early withdrawal penalties, callable features, or step‑up CDs; breaking a CD early can materially reduce realized yield.
Focuses on quoted rates/APYs and ignores compounding nuances and tax effects; in taxable accounts you would need to adjust for your specific tax situation.
Supports a limited number of rate inputs for convenience. Complex ladders with many rungs are better modeled in a spreadsheet or dedicated planning tool.

Worked examples

$20k ladder, 4 rungs: 4%, 4.5%, 5%, 5.2%

Rung share = $5,000
Weighted yield ≈ (5,000×0.04 + 5,000×0.045 + 5,000×0.05 + 5,000×0.052) ÷ 20,000 ≈ 4.625%

$30k ladder, 3 rungs: 4.2%, 4.8%, 5.1%

Rung share = $10,000
Weighted yield ≈ (10,000×0.042 + 10,000×0.048 + 10,000×0.051) ÷ 30,000 ≈ 4.7%

Deep dive

This CD ladder calculator splits your deposit equally across a chosen number of rungs, applies each rung’s rate, and shows both the per‑rung deposit amount and the blended ladder yield.

Use it to compare a ladder’s average yield against a single CD term, plan staggered maturities for liquidity, and experiment with different rate combinations when the yield curve changes.

Ideal for savers who want to move beyond a single CD and design a simple, transparent ladder that balances access to cash with competitive yields.

FAQs

Do I have to split deposits equally?: This tool assumes equal splits for simplicity. Adjust rungs/rates or run multiple scenarios for uneven splits.
Can I add more than four rungs?: Set rungs to your desired count and fill rates in order. (Interface currently shows four inputs—extend as needed.)
Does this include compounding differences?: No. It uses APY as provided. Actual compounding is reflected inside APY from banks.
Penalties for early withdrawal?: Not included. Avoid early withdrawals to preserve yield; check your bank’s penalty rules.
How do I maintain the ladder?: When a rung matures, roll it into a new longest-term CD to keep maturities staggered and yield higher.

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