Best 18 Month CD Rates for June 2026: Top Yields Up to 4.30%

The best 18 month CD rate available right now is 4.30% APY from Connexus Credit Union, with other top offers ranging from 4.00% to 4.30% APY as of June 16, 2026. Rates at this level are still running well above the historical norm, even though they have slipped from the peaks seen a few years ago.

At a Glance

• Connexus Credit Union leads with 4.30% APY on a 17 month term and a $5,000 minimum deposit.
• Top 18 month CDs (defined here as terms of 15 to 20 months) pay three to five times the national average rate or more.
• The Federal Reserve has held its benchmark rate steady at 3.50% to 3.75% for three straight meetings after six cuts since September 2024.
• Early withdrawal penalties on these CDs typically run from three to twelve months of interest.
• All listed institutions are FDIC insured banks or NCUA insured credit unions, protecting deposits up to $250,000.

Where the Top 18 Month CD Rates Stand Today

Connexus Credit Union tops the list at 4.30% APY, though its term technically runs 17 months and requires a $5,000 deposit with a six month interest penalty for early withdrawal. Popular Direct follows at 4.20% APY on a full 18 month term, but it demands a heftier $10,000 minimum and a steep nine month interest penalty. NASA Federal Credit Union pays 4.15% APY on a shorter 15 month term with a $10,000 minimum, while USAlliance Financial and Merrick Bank both offer 4.10% APY, though their entry requirements differ sharply: USAlliance asks for just $500, Merrick wants $25,000.

Rounding out the upper tier, BTG Pactual pays 4.09% APY and TAB Bank pays 4.05% APY, both with modest minimums of $500 to $1,000. A large cluster of banks and credit unions, including First Central Savings Bank, Brilliant Bank, Summit Credit Union, E*TRADE from Morgan Stanley, XCEL Federal Credit Union, AmeriCU, Bask Bank, Bread Savings and Sallie Mae Bank, all pay an even 4.00% APY, though their terms, minimums and penalties vary enough that it pays to read the fine print before choosing one over another.

What Makes These Institutions Different

Connexus Credit Union, headquartered in Wausau, Wisconsin and founded in 1935, opens membership to anyone willing to donate $5 to the Connexus Association and keep at least $5 in a savings account. Popular Direct, the online arm of Popular Bank (a subsidiary of Popular Inc. dating to 1893), serves customers across the U.S., Puerto Rico and the Caribbean from its New York headquarters.

NASA Federal Credit Union, based in Upper Marlboro, Maryland and tracing its roots to 1949, lets anyone join by signing up for a free National Space Society membership. USAlliance Financial, founded in 1966 to serve IBM employees and now headquartered in Rye, New York, opens its doors to anyone who joins the nonprofit American Consumer Council. Merrick Bank, mostly known as a credit card issuer, also runs an online only CD business. BTG Pactual, a Brazilian firm founded in Rio de Janeiro in 1983, only began offering U.S. retail banking products, including CDs, in 2025.

TAB Bank has operated exclusively online since 1998 out of a single Utah address. Brilliant Bank is the online division of Equity Bank, an FDIC insured institution with branches across Arkansas, Kansas, Missouri and Oklahoma, though its online accounts are not available to residents of those four states. E*TRADE, now under Morgan Stanley Private Bank following the 2022 acquisition, allows CD deposits of any amount at all, a rarity among the group.

How an 18 Month CD Actually Works

A certificate of deposit is a fixed rate account offered by banks and credit unions where you lock up a lump sum for a set period in exchange for a guaranteed yield. For ranking purposes, any CD with a term between 15 and 20 months counts as an 18 month CD. Once you deposit at or above the minimum, your funds sit untouched, earning interest, until the maturity date arrives. At that point you can withdraw everything, principal plus interest, without penalty.

Because these terms cluster around 18 months rather than landing exactly on it, ties in APY are broken first by whichever CD has the shorter term, then by the smaller minimum deposit, and finally alphabetically by institution name if a tie still remains.

Weighing the Trade Offs

Locking in a rate for 18 months means the bank cannot touch your APY regardless of what the Federal Reserve does in the meantime. That predictability lets you calculate exactly what you will earn by maturity, and because these accounts are FDIC or NCUA insured, deposits up to $250,000 are protected even if the institution fails. The locked structure can also work in your favor psychologically: since early withdrawal triggers a penalty, it discourages impulsive spending of money you meant to save.

The flip side is real too. Withdraw early and you will forfeit a chunk of interest, typically calculated as three to twelve months' worth depending on the institution. Most CDs also accept only a single deposit, so you cannot add more money later if you find better cash on hand. And there is a timing risk in both directions: choose an 18 month term and rates fall afterward, you will be glad you locked in; but if rates climb instead, you are stuck earning the old, lower rate until the CD matures.

As an example of the dollar impact, a $1,000 deposit in an 18 month CD paying 5.00% APY would earn $75.93 in total interest by maturity. Withdraw early where the penalty equals six months of interest, and you would forfeit $25.31 of that.

How to Pick the Right 18 Month CD Rate for Your Situation

Start with how much you can realistically set aside without needing it. Minimums here range from no minimum at E*TRADE to $25,000 at Merrick Bank, so your available cash may narrow the field quickly. Next, weigh the interest rate against the early withdrawal penalty: a CD offering a slightly higher rate but a twelve month penalty could cost you more than a lower rate CD with a shorter penalty, if there is any chance you will need the money back early.

Ryan Greiser, a certified financial planner and member of an industry financial advisor council, put it simply: matching the term length to your actual needs is the real key. If you are confident you will not need the cash for a year or more, locking in a longer term CD with a strong rate makes sense. If there is uncertainty, a shorter term or an account with a lighter penalty may serve you better.

Odd term CDs, those running 15, 16, 17 or 21 months rather than a clean 18, are common among promotional offers, so it is worth comparing across these in between terms rather than assuming the roundest number is the best deal.

Opening an 18 Month CD Step by Step

Most institutions follow a similar process. First, locate the specific CD you want, either online or at a branch. Second, establish membership or an account relationship, which for credit unions often means joining a linked nonprofit organization, such as the American Consumer Council, for a small fee. Third, complete the application with your personal details and desired deposit amount. Fourth, wait for approval. Fifth, fund the account by check, wire or electronic transfer, depending on what the bank allows. Finally, read the account terms closely so you understand the interest rate, maturity date, compounding schedule and penalty structure before committing your funds.

Once opened, an 18 month CD needs little attention until one of two moments arrives: you need the money early, which triggers the penalty and closes the account, or the CD reaches maturity, at which point you decide whether to roll the funds into a new CD or withdraw them entirely.

How the Fed's Current Stance Affects These Rates

The Federal Reserve left its benchmark rate unchanged at its April 29 meeting, holding the range at 3.50% to 3.75% for a third consecutive meeting after six rate cuts since September 2024. CD rates tend to track the federal funds rate closely, so if the Fed resumes cutting later this year, the yields available on new CDs, including 18 month terms, would likely follow that decline.

Comparing CDs Against Other Places to Park Cash

Shorter CDs sometimes edge out longer ones on rate, particularly when a bank expects future rates to fall and wants to attract deposits now with a promotional yield. Longer CDs, on the other hand, can lock in today's elevated rates for a longer stretch if you believe rates will drop later. Which approach wins depends entirely on where you think rates are headed, which is why comparing across multiple terms before committing matters.

High yield savings accounts and money market accounts offer more flexibility since you are not locking funds away, but their rates float with the market. If the Fed cuts rates, those yields would likely fall along with them, unlike a CD's fixed rate. The same variability applies to brokerage cash sweep accounts and money market funds, some of which pay considerably less than a top savings account even when marketed as competitive.

U.S. savings bonds and Treasuries present another alternative. EE bonds carry a fixed rate known upfront, while I bonds adjust every six months based on inflation. Both restrict withdrawals during the first twelve months. Treasury bills cover terms from four weeks to one year, and Treasury notes stretch from two to ten years; both are considered extremely safe but do not always match the yields available on the best CDs.

Building a CD Ladder Around an 18 Month Term

An 18 month CD can serve as one rung in a shortened CD ladder, a strategy where you split your savings across several terms rather than committing it all to one maturity date. A traditional five rung ladder spans one, two, three, four and five year terms, but a shortened version might step through six month intervals, such as six, twelve and eighteen months, giving you regular access to portions of your money while still capturing higher rates on the longer pieces. As each CD matures, you can reinvest at whatever the current top rate happens to be or withdraw the funds if your plans have changed.