Credit union · NCUA insured
Rimrock Credit Union CD Rates
Rimrock Credit Union’s best CD rate is 3.60% APY on a 6-month share certificate (CD). Terms run from 3 months to 5 years. Rates checked October 22, 2026.
How Rimrock Credit Union’s CD rates compare
Compared with banks and credit unions near Billings, MT, where Rimrock Credit Union has the most branches. $10,000, best rate first.
This credit union’s best
Rimrock Credit Union
3.60%APY
- Term
- 6 months
- Minimum
- $2,000
- Earns on $10,000
- $178
Share Certificates
Top rate
Mountain America Credit Union
4.50%APY
- Term
- 24 months
- Minimum
- $5
- Earns on $10,000
- $920
2nd-highest rate
Valley Credit Union
4.33%APY
- Term
- 12 months
- Minimum
- $500
- Earns on $10,000
- $433
Rimrock Credit Union CD score
78
CD score
Higher than 45% of U.S. banks and credit unions
- 3–8 months3–8 mo3.60%
- 9–15 months9–15 mo3.60%
- 16–30 months16–30 mo3.40%
- 31–60 months31–60 mo3.40%
- QualifiedQualified3.60%
Each track runs from the lowest to the highest rate among U.S. banks and credit unions; the dot is this rate.Qualified: needs another account or monthly activity.
Where Rimrock Credit Union ranks
By CD score, in each area where it has branches
Every rate
Current CD rates
Rates from the credit union’s website. Earnings assume the rate doesn’t change.
Share Certificates
Up to 3.60%APY · 7 terms
Early Withdraw Penalty: 180 Dividend Days. Dividends calculated daily, paid monthly. Rates accurate as of November 2014. Membership requires $25 deposit into Share Savings Account.
| Term | APY | Earns on $10,000Earns |
|---|---|---|
| 3 monthsEarly Withdraw Penalty: 180 Dividend Days | 1.00% | $25 |
| 6 monthsEarly Withdraw Penalty: 180 Dividend Days | 3.60% | $178 |
| 12 monthsEarly Withdraw Penalty: 180 Dividend Days | 3.60% | $360 |
| 24 monthsEarly Withdraw Penalty: 180 Dividend Days | 3.40% | $692 |
| 36 monthsEarly Withdraw Penalty: 180 Dividend Days | 3.30% | $1,023 |
| 48 monthsEarly Withdraw Penalty: 180 Dividend Days | 3.30% | $1,387 |
| 60 monthsEarly Withdraw Penalty: 180 Dividend Days | 3.40% | $1,820 |
Sources (3)
All captured Sep 16, 2026
Who can join Rimrock Credit Union
This may be incomplete or out of date, so check with the credit union before you apply.
Employers and groups
- Employees of Montana-Dakota Utilities are eligible for membership.
- Employees of SuperValu are eligible for membership.
- Members and employees of unions affiliated with the Yellowstone Valley Central Labor Council are eligible for membership.
- Persons retired as former employees of eligible employers are eligible for membership.
Military, government and schools
- Employees of the City of Billings are eligible for membership.
- Employees of Yellowstone County are eligible for membership.
4 more ways to join
Military, government and schools
- Employees of Yellowstone City-County Health Department are eligible for membership.
- All public employees in all adjoining counties of Yellowstone County are eligible for membership.
Family and household
- Family members of eligible individuals, including spouses, children, step-children, siblings, and grandparents, are eligible for membership.
Other ways
- Licensees of the City of Billings or Yellowstone County (including business license holders or individuals with vehicles registered in Yellowstone County) are eligible for membership.
Cost to join
- Membership begins with opening a Share Savings Account with a minimum deposit of $25.
Membership information collected October 4, 2026.