Banks deliberately hide some of their best rates from rate-tracking websites. Here is how to find them.
If you search for the best CD rates, you will find the same list on every major comparison site: 3-month, 6-month, 12-month, 2-year, 3-year, 5-year. These are the standard terms, and every rate-tracking tool monitors them obsessively.
Some banks have figured out that offering a 13-month CD instead of a 12-month CD, or a 7-month CD instead of a 6-month CD, keeps their best promotional rates invisible to those tracking tools. The bots that scrape rates look for standard terms. Odd terms slip through.
The result is a hidden layer of CD rates that often pay significantly more than the standard options on Bankrate, NerdWallet, or any rate aggregator. Finding them takes a small amount of deliberate searching.
Why Banks Offer Odd-Term CDs
Banks use promotional CD terms for two main reasons.
The first is to attract deposits without triggering a bidding war with competitors who track standard terms publicly. A bank offering a 13-month CD at 4.50% APY is unlikely to appear in any tool ranking 12-month CDs. They get the deposit inflow without the competitive pressure.
The second is to align maturity dates with their own balance sheet needs. A bank expecting a large loan portfolio to repay in 13 months wants deposits that mature at the same time. A 13-month promotional CD solves that precisely. The higher rate is their cost of getting exactly the deposit duration they need.
| Noted by BauerFinancial, which tracks rates across hundreds of institutions: some banks offer only odd-term CDs like a 13-month instead of a 12-month specifically to avoid rate-tracking bots. These banks are not trying to be listed, but they offer real rates to real customers who find them directly. |
The Non-Standard Terms Worth Knowing About
| Odd Term | Why It Pays More | What Standard Searches Miss |
| 7 months | Promotional rate | Sits between 6-month and 12-month scans, invisible to most tools |
| 9 months | Promotional rate | Newtek Bank offered 4.20% APY in early 2026, rarely tracked |
| 11 months | No-penalty structure | Pays near 12-month rates with full withdrawal flexibility |
| 13 months | Promotional rate | Competes with 12-month CDs but does not appear in 12-month rankings |
| 17 months | Promotional rate | Falls between 12-month and 2-year scans entirely |
| 27 months | Promotional rate | Sits between 2-year and 3-year, often beats both |
| 37 months | Promotional featured rate | Bank of America uses this as a featured rate above standard 3-year |
The 11-month no-penalty CD deserves special attention. Several institutions offer a CD at this term with no early withdrawal penalty, meaning you get a rate comparable to a 12-month CD with none of the lock-in risk. This appears in almost no standard comparison because aggregators look for either 12-month CDs or no-penalty CDs as separate categories.
How to Find Odd-Term Promotional CDs
Step 1: Check the full rate sheet, not the homepage
Most bank websites have a rates page listing all available CD terms, not just featured ones. Look for links labeled ‘View All Rates’ or ‘Full Rate Schedule’. Bank of America’s full schedule shows all 120 terms, most of which never appear in any comparison tool.
Step 2: Focus on credit unions
Credit unions are the most likely source of genuine odd-term promotional rates because they are member-owned and competing for deposits in very specific ways. A credit union that needs deposits for 9 months will offer a 9-month promotional CD. Their rates often do not appear in aggregators because many tools require national availability or online-only access.
Step 3: Ask directly
Banks in the $5 billion to $50 billion asset range often run promotional campaigns lasting only a few weeks. A quick chat on their website asking ‘Do you have any current promotional CD offers?’ often surfaces rates that are not publicly listed anywhere.
Step 4: Search for the odd terms specifically
Search terms like ‘9 month CD rates’, ’13 month CD rates’, or ’11 month no penalty CD’ surface results that standard rate searches miss entirely. Competition for these queries is dramatically lower, which means genuine promotional offers appear more easily in the results.
| A useful signal: Any bank that specifically advertises a term like 7, 9, 11, 13, 17, or 27 months is almost certainly doing so because it is offering a higher rate than its standard products. The unusual term is a signal, not a coincidence. |
Using the Calculator to Compare Odd Terms
The High Yield CD Calculator at highyieldcdcalculator.com accepts any term in months, which makes it ideal for comparing odd-term CDs against standard ones without rounding or estimating.
| Option | Deposit | APY | Term | Total Interest | Monthly Equivalent |
| Standard 12-month CD | $20,000 | 4.20% | 12 months | ~$847 | ~$70.58 / month |
| Promotional 13-month CD | $20,000 | 4.50% | 13 months | ~$979 | ~$75.31 / month |
| Advantage | +1 month | +$132 | +$4.73 / month |
The 13-month CD earns $132 more despite only one extra month of commitment. The monthly equivalent return is also higher because the APY is better. To run this for your own deposit, use the calculator, select Months as the unit, and enter the exact term length. It accepts any number of months directly.
The One Risk to Watch
Odd-term promotional CDs carry the same early withdrawal penalty structure as standard CDs, and sometimes stricter terms. Before opening any promotional CD, confirm three things:
- What is the early withdrawal penalty? Promotional CDs sometimes carry steeper penalties, such as 180 days of interest instead of the standard 90 days for short-term CDs.
- Does the CD auto-renew at the promotional rate or the standard rate? Many promotional CDs renew at the bank’s much-lower standard rate at maturity. Set a calendar reminder for the maturity date so you can act during the grace period.
- Is the rate available in your state? Some promotional CDs are offered only in specific states or require branch opening.
These are standard due-diligence questions for any CD, but they matter more for promotional offers because the terms can differ from the bank’s standard disclosures.
| See what today’s CD rates mean for your specific deposit. Calculate now: highyieldcdcalculator.com |
| Examples of promotional CD rates are drawn from publicly available bank disclosures, BauerFinancial research, Fortune CD rate coverage, and direct bank rate pages as of Q1 to Q2 2026. Rates change frequently and promotional offers are time-limited. Always verify current rates, terms, penalties, and availability directly with your financial institution before opening any account. This article is for informational purposes only and is not financial advice. |