What is the best 18-month CD rate?

As of May 2026, the best 18-month CD rates are approximately 4.25%–4.60% APY at top online banks and credit unions. In the current inverted yield curve environment, 18-month rates typically fall slightly below 12-month rates — but above 2-year and longer rates. Rates change frequently; verify with the institution before opening.

How much does an 18-month CD earn on $10,000?

On a $10,000 deposit at 4.40% APY for 18 months, you earn approximately $662 in interest (using simple approximation). At $25,000, that's approximately $1,655. At a traditional bank's standard rate of 0.50% APY, the same $10,000 earns about $75 over 18 months — a difference of nearly $587.

Is an 18-month CD better than a 12-month CD right now?

In May 2026, 12-month CD rates are typically higher than 18-month rates due to the inverted yield curve. However, an 18-month CD makes sense if: (1) you want to lock in a solid rate for longer without committing to a full 2 years, or (2) an institution is offering a promotional 18-month rate that exceeds its 12-month rate. Always compare the specific rates at your target institution.

Who offers 18-month CDs?

Many banks and credit unions offer 18-month CDs, including Ally Bank, Discover Bank, Marcus by Goldman Sachs, Synchrony Bank, and numerous credit unions. Some traditional banks also offer 18-month terms — Bank of America and Citibank occasionally feature them as promotional terms. Brokered CD platforms (Fidelity, Schwab) provide access to 18-month CDs from multiple issuers.

What is the early withdrawal penalty on an 18-month CD?

Early withdrawal penalties on 18-month CDs typically range from 90 to 180 days of interest. At Ally, the penalty for terms of 25 months or less is 60 days of interest; at Discover, it's 9 months of interest on a 2-year CD. Confirm the exact penalty for your specific institution and term before opening, as breaking an 18-month CD early can eliminate a significant portion of earned interest.

Best 18-Month CD Rates 2026 — Top APYs for an 18-Month Term

The best 18-month CD rates reach approximately 4.25%–4.60% APY in May 2026, offering a middle path between locking in a 12-month rate and committing to 2 full years. The 18-month term can be useful for CD laddering, specific savings timelines, and occasionally catching a promotional rate that beats the standard 12 or 24-month offerings.

Rates shown are as of May 2026 and change frequently. Verify the current rate directly with the institution before opening.

Best 18-Month CD Rates (May 2026)

Institution Type	Approximate 18-Month APY
Online banks (top offers)	4.25%–4.60%
Credit unions	4.10%–4.50%
Brokered CDs	4.20%–4.55%
Traditional big banks	0.25%–1.25%

How Much Can You Earn at the Best 18-Month Rate?

Deposit	APY	Interest Earned (18 months)
$5,000	4.40%	~$330
$10,000	4.40%	~$660
$25,000	4.40%	~$1,650
$50,000	4.40%	~$3,300

18-Month vs. 12-Month vs. 2-Year CDs

Term	Typical Top APY	Interest on $10,000	Total Returned
12 months	4.65%	~$465	~$10,465
18 months	4.40%	~$660	~$10,660
2 years	4.10%	~$838	~$10,838

In an inverted yield curve environment, the 12-month CD pays the highest rate, but for longer holds, the 18 and 24-month CDs produce more total interest dollars by keeping your money deployed longer. The right choice depends on your timeline:

Need funds in ~1 year: 12-month CD for the highest rate
Need funds in ~1.5 years: 18-month CD to avoid reinvesting risk in 12 months
Flexible and want maximum simplicity: 12-month CD, reinvest at maturity

When an 18-Month CD Makes Strategic Sense

1. Avoiding reinvestment risk: If you’re concerned that 12-month CD rates will fall significantly before your next renewal, locking in for 18 months at today’s rate protects you from that scenario.

2. CD laddering: An 18-month rung in a CD ladder creates a maturity at the halfway point between your 12-month and 2-year rungs. For example:

6-month CD → matures Month 6
12-month CD → matures Month 12
18-month CD → matures Month 18
2-year CD → matures Month 24

3. Matching a specific timeline: If you have a financial goal precisely 18 months away (a down payment, a wedding, a debt payoff plan), an 18-month CD matches your timeline without the risk of an early withdrawal penalty.

4. Promotional offers: Bank of America, Citibank, and TD Bank periodically feature 18-month or similar-length promotional CDs at rates that exceed their 12-month standard rates. When a promotional 18-month rate beats the 12-month rate, it’s worth considering.

Early Withdrawal — Know the Penalty First

A typical 18-month CD penalty: 90–180 days of interest.

At 4.40% APY on $10,000, 180 days of interest = approximately $220. If you break an 18-month CD at month 9, you earn 9 months of interest minus the 180-day penalty — netting roughly $220 in interest. You won’t lose principal, but you’ll sacrifice a significant portion of your earnings.

Rule: Only open an 18-month CD with money you’re certain you won’t need for the full 18 months. If you’re uncertain, use an 11-month no-penalty CD (Ally or CIT Bank) or a high-yield savings account.

Written by WealthVieu

WealthVieu researches and writes data-driven personal finance guides using primary sources including the IRS, Bureau of Labor Statistics, Federal Reserve, and Census Bureau.

The content on Wealthvieu is for informational purposes only and should not be considered financial, tax, or investment advice. Consult a qualified professional before making financial decisions. Full disclaimer · Editorial policy