Best 18-Month CD Rates 2026

Quick answer

An 18-month CD makes sense when your goal date genuinely lands 15 to 21 months out — close enough to a year that a 1-year CD matures too early, but not far enough out to justify a full 2-year lock. If your timeline is a cleaner match for 12 or 24 months, use that term instead; the rate difference at 18 months usually isn't large enough to chase on its own. To find the right fit for your timeline, compare the best 18-month CD rates 2026 across institutions before committing.

The full picture

As of today, Merrick Bank's 18-month CD is paying … APY. Eighteen-month CDs occupy an unusual spot in most banks' rate sheets: they are advertised less prominently than the 1-year and 2-year terms, so it's worth specifically checking the 18-month rate rather than assuming it splits the difference evenly between the two. Sometimes it does. Sometimes a bank prices the 18-month term aggressively to attract deposits into a specific maturity bucket, and it briefly beats both neighboring terms.

The best CD APY across all terms pooled currently sits at 4.95% — a useful benchmark, but that number can come from any term, so always compare the 18-month rate directly against what you'd earn at 12 or 24 months.

The term's real value is precision. If you know a specific expense is coming in a year and a half — a tuition payment, a planned renovation, the tail end of a multi-year savings goal — an 18-month CD locks your rate for exactly that window instead of forcing you to choose between maturing too early (1 year) or holding longer than necessary (2 years).

Quick picks

Rates updated from provider disclosures. Verify current terms before opening.

What $10,000 earns over 18 months

Exact dollar returns depend on the APY you lock. Rather than showing a static table that goes stale, use our calculator to model your deposit at today's live rates:

👉 Run your own numbers with our CD calculator

As a rough guide, the gap between a top online 18-month CD and the national average can add up to several hundred dollars on a single $10,000 deposit over the full term — well worth the five minutes it takes to compare.

18-month CD vs the terms on either side

If two of these three rates are within a few basis points of each other — which is common in today's relatively flat rate environment — pick the term that matches your actual timeline rather than the one with the marginally higher APY.

For context, the best high-yield savings account is currently paying 4.27% APY — liquid and no penalty for withdrawals. If your timeline is uncertain, a HYSA may serve you better even at a slightly lower yield. See our HYSA vs CD guide for the full framework.

Choose X if

• Choose an 18-month CD if your goal date is specifically 15 to 21 months away and you want the closest term match available.
• Choose a 1-year CD if your goal is closer to 12 months, or you'd rather re-evaluate rates sooner.
• Choose a 2-year CD if your goal is closer to 24 months and the 2-year rate is meaningfully higher.
• Choose a HYSA if your timeline is genuinely uncertain.

When this recommendation changes

How we ranked

We ranked 18-month CDs on APY, minimum deposit, early-withdrawal penalty structure, and FDIC or NCUA insurance coverage. Affiliate relationships do not affect rankings.

SwitchWize earns referral fees from some linked accounts. Rates and terms change frequently; verify with each institution before opening.

Sources

• FDIC Weekly National Rate Survey
• FDIC deposit insurance rules
• NCUA share insurance overview
• SwitchWize methodology

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