How to Build a $100,000 CD Ladder
A practical walkthrough for splitting $100,000 across CDs with staggered maturities — using current top rates, real banks, and a clear reinvestment plan. Includes projected interest and a side-by-side comparison against a single CD and a high-yield savings account.
Rates last updated May 3, 2026.
Why $100,000 Is a Sweet Spot for a CD Ladder
$100,000 is large enough that even small APY differences move real dollars — a 0.25% gap is $250 per year — but small enough to fit comfortably under the FDIC $250,000 per-bank limit. That means you can build a five-rung ladder at a single bank without worrying about insurance gaps, or split it across multiple banks purely to chase the best rate at each term.
A ladder beats putting the full $100,000 into one long-term CD because it staggers maturity dates. You always have a rung coming due within the next 12 months, so you are never fully locked out of your money. It also beats keeping $100,000 in a savings account when rates are expected to fall: a HYSA rate can drop overnight, while a locked-in CD rate cannot.
The other practical reason: at $100K, the operational overhead of managing 3 to 5 CDs is immaterial. The interest you pick up by laddering more than pays for the time spent setting it up.
The Classic $100,000 5-Rung CD Ladder
The cleanest structure is five equal rungs of $20,000 each, in 1-year, 2-year, 3-year, 4-year, and 5-year CDs. Below are the current top APYs at each term, with projected interest at maturity for each rung.
| Rung | Term | Amount | Top APY | Bank | Interest at Maturity |
|---|---|---|---|---|---|
| 1 | 1 Year (12mo) | $20,000 | 4.23% | GECU | $846 |
| 2 | 2 Year (24mo) | $20,000 | 4.10% | United Fidelity Bank, fsb | $1,640 |
| 3 | 3 Year (36mo) | $20,000 | 4.10% | United Fidelity Bank, fsb | $2,460 |
| 4 | 4 Year (48mo) | $20,000 | 4.10% | NASA Federal Credit Union | $3,280 |
| 5 | 5 Year (60mo) | $20,000 | 4.18% | NASA Federal Credit Union | $4,180 |
| Totals | $100,000 | $12,406 | |||
Interest figures use simple interest (APY × principal × years) for clarity. Actual returns will be slightly higher because of monthly compounding, and they will change as you reinvest each maturing rung at the prevailing top 5-year rate. See our CD interest calculation guide for the exact formula.
Want to model your exact ladder? Use the CD Ladder Calculator to plug in your own deposit, choose rungs, and see compound-interest projections against a single CD or HYSA.
First-Year Interest on a $100,000 CD Ladder
Even before any rung matures, all five CDs are accruing interest from day one. Here is what a $100,000 ladder generates across the first year, using the current top APY at each term:
The blended APY across all five rungs is the average of each term's top rate. Because longer terms currently pay only marginally more than 1-year terms, the blended rate sits close to the middle of the curve. If long-term rates were significantly higher than short-term rates, the ladder would lean more toward the long-term yield.
Step-by-Step: Build Your $100,000 Ladder
- 1.Confirm the $100,000 is truly long-term money
Your emergency fund should already be parked in a HYSA. The CD ladder is for medium- to long-term savings — money you do not expect to need within the next 12 months.
- 2.Decide rung count and interval
Five equal rungs at 1-year intervals is the standard. If you want more frequent access, run a 4-rung ladder at 6-month intervals (6, 12, 18, 24 months). If you are comfortable locking money up longer, extend to 7 rungs at the cost of a longer build-out period.
- 3.
- 4.Open and fund all five CDs
Most online banks and credit unions let you open and fund a CD entirely online in 10 to 15 minutes per CD. Keep $20,000 ready in your funding account for each one. Track confirmation numbers, maturity dates, and APY in a single spreadsheet.
- 5.Set maturity reminders 30 days early
Banks usually open a 7- to 14-day grace window at maturity. If you miss it, most banks auto-renew at whatever rate they choose — often well below the best available. A 30-day reminder gives you time to shop and move funds before auto-renewal kicks in.
- 6.Reinvest each maturing rung at the longest term
When the 1-year CD matures, roll it into a new 5-year CD at the top of the ladder. By year 5, every rung is a 5-year CD, but one matures every 12 months. You now have continuous 5-year rates with annual liquidity — the goal of the strategy.
$100,000 Ladder vs Single 5-Year CD vs HYSA (5-Year Comparison)
| Strategy | 5-Year Interest | Liquidity | Rate Risk |
|---|---|---|---|
| 5-Rung CD Ladder | $12,406 | $20K every 12 months | Low (hedged) |
| Single 5-Year CD (4.18%) | $20,900 | None until year 5 | High (fully locked in) |
| Top HYSA (4.50% today, but variable) | $22,500* | Full anytime | High (rate floats) |
*HYSA projection assumes the current top APY holds for five years, which is unrealistic — HYSA rates change with the federal funds rate. If rates drop 100bp, the HYSA total drops proportionally. The CD ladder figure is closer to realized return because each rung's APY is locked at purchase.
The single 5-year CD nominally beats the ladder if you assume current rates will stay flat — but that bet ties up the full $100,000 for five years with no liquidity and a stiff early withdrawal penalty if you need to break it. The ladder gives up a small amount of yield in exchange for annual access to 20% of your principal.
Variations on the $100K Ladder
Short Ladder (3 rungs, 6/12/18mo)
~$33,300 per rung. Best for $100K you might need within two years (down payment, planned major purchase). Yields slightly less than the 5-rung version but offers maturity every 6 months. Pairs well with the top 6-month rate of 4.20%.
Barbell Ladder ($40K / $20K / $40K)
Heavier weighting on the shortest and longest rungs. Maximizes liquidity and long-term yield at the cost of middle-term coverage. Good when you expect rates to fall sharply (you want long-term CDs locked in) but also want frequent access to a meaningful chunk of cash.
Treasury Ladder Substitute
In a high-tax state, a Treasury ladder may net more than a CD ladder because Treasury interest is exempt from state and local income tax. Run the math at your state rate before committing — see our CD vs Treasury comparison.
No-Penalty Hybrid
Allocate $20K to a no-penalty CD alongside four traditional rungs. You give up some yield on that slice but gain full liquidity on 20% of the ladder — useful if you are not 100% confident the money is fully "locked away" for the duration.
FDIC Insurance and Risk Considerations
$100,000 is well under the FDIC limit of $250,000 per depositor, per bank, per ownership category. That means a $100K ladder at a single bank is fully insured against bank failure. Most ladder builders still spread across multiple banks — not for insurance, but to capture the best APY at each term, since no single bank consistently has the highest rate at every term.
The main remaining risks are interest-rate risk (rates rise after you lock in, and your CDs under-perform new offerings) and liquidity risk (you need the full $100K before maturity). The ladder structure mitigates both. Rate risk is hedged because only the longest rung is locked at the old rate by year 5. Liquidity risk is mitigated because $20K matures every 12 months without penalty.
For a deeper look at when CDs do and do not fit the bigger savings picture, see our Best Places to Park Cash Short-Term guide.
Frequently Asked Questions
How much interest can $100,000 earn in a CD ladder?
It depends on the rates locked in across each rung. With a 5-rung ladder at current top rates near 4.10%–4.25% APY, $100,000 can produce roughly $4,000 to $4,200 in interest in the first year, and more as shorter rungs roll into longer-term CDs at the top of the ladder. The exact return depends on the rates available when each rung is purchased and reinvested.
Is $100,000 too much for a single CD?
A single CD is fine up to the FDIC insurance limit of $250,000 per depositor, per bank, per ownership category. $100,000 in one CD at one bank is fully insured. The reasons to ladder a $100,000 balance are not insurance — they are liquidity (you do not want all of it locked up at once) and rate-risk hedging (you do not want to commit the entire amount to one term).
Should I split a $100,000 CD ladder across multiple banks?
You do not have to for FDIC coverage — $100,000 stays under the $250,000 per-bank limit even if all five rungs are at the same bank. You may still want to use multiple banks to capture the highest APY at each term, since no single bank usually has the best rate at every term. Splitting also reduces operational risk if one bank changes its terms or has account issues.
What is the best rung size for a $100,000 CD ladder?
The classic approach is to divide the total evenly — for $100,000 across 5 rungs, that is $20,000 per rung. Equal rungs make tracking simple and produce a predictable annual maturity. Some investors use a barbell strategy (more in the shortest and longest rungs) or weight rungs by current rate spreads, but equal sizing is the cleanest starting point.
Is a $100,000 CD ladder better than a $100,000 HYSA?
It depends on rate direction and your liquidity needs. CD rates are locked in, so a ladder protects $100,000 from rate cuts — useful when forecasts point lower. A HYSA keeps the full $100,000 liquid but its rate floats and can drop overnight. Many investors use both: keep an emergency cushion in a HYSA, then ladder the long-term portion across CDs.
What happens to a $100,000 CD ladder when a rung matures?
When the shortest rung matures, the principal plus interest (typically around $20,000 plus a year of interest, for a 5-rung $100K ladder) becomes available. You then reinvest it into a new long-term CD at the top of the ladder. Set a calendar reminder before maturity so you can shop for the best new rate rather than letting the bank auto-renew at whatever it offers.
Are CD ladder earnings taxed?
Yes. Interest earned on bank CDs is taxed as ordinary income at your federal and (in most states) state income tax rate. The bank issues a 1099-INT for each CD that earns more than $10 of interest in the year. Treasury bills and notes have a tax advantage — they are exempt from state and local income tax — which is why investors in high-tax states sometimes prefer a Treasury ladder for large balances.
Related Guides
CD Ladder Strategy Explained
How CD laddering works conceptually, with smaller-dollar examples
Best 1-Year CD Rates
Top 12-month CDs for the shortest rung of your ladder
Best 2-Year CD Rates
Top 24-month CDs for your medium rung
Best 5-Year CD Rates
Top 60-month CDs — the anchor of a $100K ladder
Treasury Bill Ladder
A state-tax-free alternative for large balances
CD Rates Forecast
Where CD rates are headed and when to lock in
FDIC Insurance Guide
How $100,000+ is protected across banks
CD Early Withdrawal Penalties
What it costs to break a $20K rung early