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 Cornerstone State Bank Rates & Review September 2026
Content reviewed by
Brian McKay
Brian McKayFounder & Data ArchitectExpertise
Brian is the Founder of MonitorBankRates.com. For over 18 years, he has utilized his background in enterprise infrastructure to engineer proprietary systems that track rates from over 8,000 financial institutions.
Read Full Bio →
Editorial Disclosure
The rates displayed are actual, verified rates sourced directly from the official websites of banks and credit unions. Our editorial content is independent of any advertiser relationships.
✓Fact Checked
Rates Last Updated and Verified: September 9, 2026
Cornerstone State Bank's IRA 36-48-Month C.D. rates are at 4.55%, IRA 36-48-Month C.D. rates are at 4.04%, IRA 36-48-Month C.D. rates are at 3.53%, 12 - 23-Month C.D. rates are at 3.38%, 24 - 35-Month C.D. rates are at 3.02%. Cornerstone State Bank's savings rates are at 0.75%. Cornerstone State Bank's money market rates are at 1.06%. MonitorBankRates evaluates the financial stability of Cornerstone State Bank with a 5.0 Star Rating, an A Overall Health Grade, and a Texas Ratio of 6.12%. Rates last updated and verified on 09/09/2026. Cornerstone State Bank money market rates, and other rates, are continually updated to reflect market conditions. We recommend checking back frequently to get the best money market rates and other rates available. Have you opened an account or have any experiences at Cornerstone State Bank? Share your experience about Cornerstone State Bank by leaving a review below, or read customer reviews before you decide to use Cornerstone State Bank. 
Cornerstone State Bank CD Rates
Cornerstone State Bank Savings Rates
Cornerstone State Bank Money Market Rates
Cornerstone State Bank Checking Rates
Financial Health HistoryCornerstone State Bank’s Texas Ratio rose from 0.88% in Q3 2023 to 6.12% in Q2 2026, so its financial health has weakened over the past 12 quarters. Over the same period its Star Rating moved from 2.3 to 5.0 and its Health Grade from C- to A. Lower Texas Ratios are healthier; the amber line marks the 15% level a bank must stay under to qualify for the MBR Verified Healthy badge. Hover over or tap a point for that quarter’s figures. Swipe the chart sideways to see every quarter.
Texas Ratio, left axis (lower is healthier)MBR Star Rating, right axis (1 to 5)Health Grade15% Verified Healthy threshold
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How to read this chart: the two lines move in opposite directions by design. The Texas Ratio (blue) measures trouble, so a rising blue line means more non-performing assets against capital. The Star Rating (green) and Health Grade chips measure strength, so they fall when the Texas Ratio climbs and recover when it drops. Show the quarterly figures
Source: FDIC call reports, MonitorBankRates analysis. Ratings shown are recomputed for each quarter with the current methodology and exclude member reviews.
Methodology & Data SourcesMonitorBankRates Star Rating: Our rating for Cornerstone State Bank is derived from comprehensive financial data published quarterly by the FDIC. Our proprietary rating system evaluates financial stability (including the Texas Ratio and capitalization) and combines it with customer feedback (user reviews) to help you make informed banking decisions. Texas Ratio: We calculate the Texas Ratio using standard industry methodology. This ratio compares the bank's non-performing assets to its tangible common equity and loan loss reserves to assess financial health. Rate Data Aggregation: We gather Cornerstone State Bank rates using proprietary online rate aggregation technology. Our systems scan constantly to provide the most recent rates available to our visitors.
Disclaimer: Interest rates are variable and subject to change without notice. While we strive for accuracy, rates can change rapidly based on market conditions.
It is always advisable to check with Cornerstone State Bank's official website for the most current offers and terms.
Bank Profile & Overview
Institution Name
Cornerstone State Bank
Bank Holding Company
CORNERSTONE BCORP INC
Address
401 4th St Nw,
Montgomery, MN 56069 · Le Sueur
Website
https://cornerstonestatebank.com
FDIC Certificate #
21525
Established
19740408
FDIC Insurance Date
19740408
Domestic Offices
7
Total Branches
7
Regulator
FDIC
FDIC Insured
✓ Yes — Up to $250,000
Financial Health & AssetsA
Overall Health Grade
Score: 97/100
5.0
Exceptional
Out of 5.0 Stars
6.12%
Texas Ratio
Nat'l avg: 5.85%
Return on Assets (ROA)
1.4893%
Return on Equity (ROE)
18.9400%
Non-Performing Loans (NPL)
0.49%
Total Assets
$246,958,000
Total Deposits
$223,948,000
Equity Capital
$19,950,000
Net Income
$1,817,000
Headquarters
Montgomery
Total Branches and Offices
7
Source: FDIC | Last Updated 06/30/2026
Customer Reviews
There are no reviews for Cornerstone State Bank yet. Feel free to create one below.
Looking for more bank and credit union reviews?
Visit our Community Reviews hub to read what other members are saying, ask questions, and join the conversation.
Add Your Rating and Review for Cornerstone State Bank
Frequently Asked Questions About Cornerstone State BankHow many branches does Cornerstone State Bank operate?Cornerstone State Bank currently maintains approximately 7 branch location(s). Physical branches allow members to access in-person services such as notary consultations and safe deposit boxes. Is there a first-time homebuyer program?Currently, Cornerstone State Bank does not list a specific first-time homebuyer program, but they provide a range of mortgage and home equity products to assist members with property financing. Are credit management and repair services offered?While formal credit repair services are not currently listed, Cornerstone State Bank provides members with tools to manage their accounts and build a solid financial history. Does Cornerstone State Bank offer online and mobile banking?Most modern institutions like Cornerstone State Bank provide digital access. This includes the ability to check balances, transfer funds, deposit checks via mobile app, and view statements online. You can usually find these services at their official website: https://cornerstonestatebank.com. Current Cornerstone State Bank Rates
Retrieved from our database of financial products. Rates subject to change.
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