CD Ladder Calculator
Split savings across multiple CDs with staggered terms. See blended APY, total earnings, and when each rung matures.
How a CD ladder works
A CD ladder divides savings into equal portions, each placed in a CD with a different term length. A 4-rung ladder on $20,000 opens four CDs of $5,000 each at 3, 6, 9, and 12 months. When the 3-month matures, you roll it into a new 12-month CD. Each subsequent maturity does the same. Within one year, all four rungs are at the 12-month term, giving you the maximum available rate with one CD maturing every three months.
This approach solves the core problem with a single long-term CD: the all-or-nothing commitment. The ladder lets you reinvest a portion of your savings at prevailing rates every few months, capturing rate increases faster and reducing the impact if you need funds unexpectedly.
Example: $20,000 four-rung ladder at current rates
| rung | term | amount | APY | interest earned | matures |
|---|---|---|---|---|---|
| 1 | 3-month | $5,000 | 4.05% | ~$51 | 3 months |
| 2 | 6-month | $5,000 | 4.10% | ~$102 | 6 months |
| 3 | 9-month | $5,000 | 4.20% | ~$157 | 9 months |
| 4 | 12-month | $5,000 | 4.30% | ~$215 | 12 months |
| total | ~$525 | blended 4.16% APY | |||
Rates above reflect current best rates. The calculator above lets you adjust every APY and amount to match your specific situation and institution choices.
CD ladder vs. single long-term CD
A single 12-month CD on $20,000 at 4.30% earns about $860 over the year and ties up all $20,000 until maturity. The 4-rung ladder above earns about $523 over the same period but provides access to $5,000 every three months. The tradeoff: the ladder earns less in year one because three of the four rungs are at shorter terms with slightly lower rates. But each maturing rung reinvests at whatever rate is available — potentially higher if rates rise.
The ladder wins when rates are rising or flat, when you want periodic liquidity, or when you are uncertain about the rate outlook. A single long-term CD wins when you are confident rates will fall and want to lock in the current rate on the full balance.
CD ladder vs. high-yield savings account
The best HYSAs currently pay around 4.40% APY with full liquidity. On paper that beats the short-term rungs of a ladder. The difference: the HYSA rate is variable and drops immediately when the Fed cuts. Your CD rungs continue paying their locked rates regardless. If the Fed cuts twice in 2026, the HYSA might drop from 4.40% to 3.40% overnight. The 12-month rung you locked in today keeps paying 4.30% through its maturity.
The practical strategy: keep three to six months of expenses in a HYSA for genuine emergencies, and put longer-term savings in a CD ladder. The HYSA handles true liquidity needs; the ladder handles the rest with rate certainty. Use the CD vs. HYSA calculator to compare specific rates and timelines.
How many rungs should your ladder have?
The right number depends on how often you want access to your money and your total balance. More rungs mean more frequent maturities and more accounts to manage.
- 3 rungs (3, 6, 9 months): best for shorter horizons or smaller amounts. Money accessible every three months over nine months.
- 4 rungs (3, 6, 9, 12 months): the most common structure. One maturity every three months over the year. After a full cycle, all CDs are at the 12-month rate.
- 5 rungs (3, 6, 9, 12, 18 months): for larger balances where capturing the 18-month rate is worth the longer wait on the last rung.
- Multi-year ladder (1, 2, 3, 4, 5 years): one matures each year and rolls into a new 5-year. All savings eventually reach the 5-year rate with annual access to 20% of the balance.
Reinvestment strategy at maturity
When a CD matures, banks give you a grace period of typically seven to ten days to withdraw, add funds, or roll into a new CD with no penalty. The standard ladder move: roll the matured rung into the longest available term at the best rate available at that moment. Always compare the bank’s renewal rate at maturity against the top rates on our current rankings. Banks auto-renew at standard rates by default — almost always well below the top available rate. The grace period is your only window to act.
Tax considerations for CD ladders
Each CD in your ladder generates taxable interest income in the year it is paid, not the year the CD matures. You may receive Form 1099-INT income from multiple CDs in the same tax year. For savers in high federal brackets or high-tax states, after-tax yield can be significantly below the headline APY. Consider holding CD ladders inside a traditional or Roth IRA, where interest is tax-deferred or tax-free. Use the tax-equivalent yield calculator to compare after-tax outcomes across account types and brackets.
A CD ladder splits money across multiple CDs with staggered maturity dates. As each matures, you reinvest at current rates. You capture competitive fixed rates, reduce reinvestment risk, and have predictable access to a portion of your savings at regular intervals — without locking everything in for years at once. It is the most common strategy for optimizing CD returns while maintaining some liquidity.
CD ladders provide fixed rates per rung, protecting against rate cuts during the term. HYSAs offer full liquidity but variable rates that drop immediately if the Fed cuts. The practical answer for most savers: keep three to six months of expenses in a HYSA for genuine emergencies, and put longer-term savings in a CD ladder. Use the CD vs. HYSA calculator to compare specific rates and timelines.
Enter the best currently available rate for each term from our rankings: 3, 6, and 9-month CDs and 12-month CDs. The calculator defaults are pre-filled with today’s best verified rates. You can also enter a single bank’s rates across all terms if you prefer to keep the ladder at one institution.
You get a grace period of typically seven to ten days to withdraw, add funds, or roll into a new CD without penalty. The standard ladder move: roll the matured rung into the longest available term at the best available rate. Set a calendar reminder before each maturity date — banks auto-renew at below-market rates if you do nothing.
Yes, and it simplifies management. The downside: one bank rarely offers the best rate at every term. A multi-bank ladder captures the top rate at each rung but requires managing multiple accounts. For smaller balances the convenience of one bank often outweighs the yield difference. For larger balances, check whether the rate spread justifies the added complexity.
Each CD is separately FDIC insured up to $250,000 per depositor, per institution. A ladder spread across multiple banks can hold up to $250,000 at each bank fully insured. Use the FDIC insurance calculator to verify coverage for your specific ladder structure.