South Dakota Savings Rates - August 2026
Brian McKay
Brian McKay
Founder & Data Architect- Automated Online Rate Data Aggregation
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The best savings rates for South Dakota include Interfaith Federal Credit UnionInterfaith Federal Credit Union815 Columbus St, Rapid City, SD 57701A+5.0 ★Texas Ratio: 1.57%Real return: +2.20%APY minus 2.8% CPI (February 2026) Regular/Special Share Savings Accounts at 5.00% APY, OAB One American BankOAB One American Bank549 Broadway St, Centerville, SD 57014A+5.0 ★Texas Ratio: 3.42%Real return: +0.50%APY minus 2.8% CPI (February 2026) Savings+ at 3.30% APY, Bluestone Federal Credit UnionBluestone Federal Credit Union3400 S Sycamore Ave, Sioux Falls, SD 57110 4412A+5.0 ★Texas Ratio: 4.83%Real return: +0.50%APY minus 2.8% CPI (February 2026) 12 MO VARIABLE SHARE CERT. at 3.30% APY, SNB Security National Bank of SDSNB Security National Bank of SD325 Dakota Dunes Blvd, Dakota Dunes, SD 57049A+5.0 ★Texas Ratio: 0.00%Real return: +0.45%APY minus 2.8% CPI (February 2026) Sidekick Savings at 3.25% APY, and Merchants State BankMerchants State Bank305 S Main St, Freeman, SD 57029A+5.0 ★Texas Ratio: 2.01%Real return: +0.45%APY minus 2.8% CPI (February 2026) Traditional IRA Savings at 3.25% APY.
Use the tables below to compare savings rates across South Dakota side-by-side. South Dakota savings rates currently reach as high as 5.00% APY from Interfaith Federal Credit Union at 815 Columbus St, Rapid City, SD 57701. Rates are continually updated — we recommend checking back frequently.
Savings rates reflect recent market quotes and representative offers available to depositors in South Dakota and the surrounding area. Last Updated and Verified: August 28, 2026
Compare the Best Savings Rates in South Dakota
Variable Rate
Qualifications Required: 1 direct deposit or ACH credit; 12 debit card purchases; e-statements enrollment; online banking enrollment/login; Qualifying balance up to $100,000.00
When linked to a Kasasa Cash Back Checking Account.
compounded monthly
compounded monthly
compounded monthly
For children under 12 years of age
Dividends paid 6/30/2026
Banks and Credit Unions: If you identify an incorrect rate or wish to request the removal of your institution’s data, please contact us here.
South Dakota Savings Rate Trends
Compare local South Dakota savings rate quotes against the statewide average
Daily savings rate averages tracked across our database of 8,500+ banks and credit unions — updated every evening.
South Dakota high-yield savings rates fell 0.124 points over the past 7 days to 1.987% APY, down from 2.111%.
South Dakota standard savings rates rose 0.012 points over the past 7 days to 0.759% APY, up from 0.747%.
South Dakota Savings Rate Forecast — Next 12 Months
Savings rates move with Federal Reserve policy. Our model uses the current SD high-yield average and a Fed funds spread to project the likely rate trajectory for 2026–2027.
Savings account rates are variable and move in close correlation with the Federal Reserve’s federal funds rate target. Our 12-month forecast is derived from the current SD high-yield savings average of 1.987% APY and a Fed funds spread model calibrated to the historical relationship between policy rate changes and deposit rate adjustments at banks and credit unions.
Key assumptions: 1–2 Federal Reserve rate cuts of 25 basis points each over the next 12 months, based on current CME FedWatch consensus; savings institutions typically pass through 70–90% of rate cuts to deposit rates within 60–90 days. High-yield online savings rates tend to adjust faster than standard branch-based savings rates.
Important notice: This forecast is for informational purposes only and should not be used as the sole basis for financial decisions. Rate forecasts carry significant uncertainty. The actual trajectory will depend on Federal Reserve decisions, economic conditions, and competitive dynamics among financial institutions in South Dakota.
Savings Account Earnings in South Dakota
Annual interest earnings at current SD average APYs, based on the high-yield and standard savings averages tracked in our database. Compounding assumed monthly.
| Balance | HY Savings (1.987% APY) | Monthly Earnings | Standard Savings (0.759% APY) | Monthly Earnings |
|---|---|---|---|---|
| $5,000 | $99.36 / year | $8.28 | $37.94 / year | $3.16 |
| $10,000 | $198.72 / year | $16.56 | $75.88 / year | $6.32 |
| $25,000 | $496.80 / year | $41.40 | $189.70 / year | $15.81 |
| $50,000 | $993.60 / year | $82.80 | $379.40 / year | $31.62 |
| Earnings estimates use daily compounding. Actual earnings depend on exact rate, compounding frequency, and daily balance maintained. Rates are variable and subject to change. Source: South Dakota savings rate averages as of August 29, 2026. | ||||
About Our South Dakota Savings Rate Database
MonitorBankRates tracks 92 savings rates from 9 banks and 10 credit unions offering savings accounts to South Dakota residents — including community institutions, regional banks, and national online options. Our proprietary aggregation system pulls verified rate data directly from each institution’s official website — no estimates, no national averages passed off as real offers.
Every rate listed includes the institution’s Safety Grade (A+ to F), Star Rating (1–5), and Texas Ratio — objective financial health metrics calculated from FDIC and NCUA regulatory data — so you can compare yield and institutional safety in one place.
Current top rate: Interfaith Federal Credit Union offers a savings account at 5.00% APY. Use the rate table above to compare all current offers in South Dakota.
How to Find the Best Savings Rates in South Dakota
What to compare when shopping for a savings account in South Dakota
To find the best savings APYs in South Dakota, start with credit unions and online-only banks — South Dakota has 10 credit unions in our database, and they consistently offer some of the highest yields because they are member-owned nonprofits with lower overhead than traditional banks.
Always compare the APY (Annual Percentage Yield), not just the interest rate. APY reflects compounding and is the true measure of what you’ll earn. Savings accounts that compound daily earn slightly more than those compounding monthly at the same stated rate. The current SD high-yield savings average is 1.987% — but top local institutions are offering as high as 5.00%, so shopping around pays off.
Unlike a CD, savings account rates are variable — your rate can change at any time with Federal Reserve policy. Many institutions offer elevated introductory rates that reset after a promotional period. Review your account periodically to ensure your APY remains competitive.
When a High-Yield Savings Account Makes Sense
- Emergency fund: Financial experts recommend 3–6 months of expenses in a liquid, FDIC-insured account. South Dakota high-yield savings rates currently average 1.987% APY — far above a typical checking account.
- Short-term savings goals (6–24 months): If you may need the money soon, a savings account gives you immediate access without early withdrawal penalties.
- Parking cash between investments: A high-yield savings account at South Dakota institutions keeps idle cash working harder while remaining fully accessible.
- You prefer banking locally — 19 institutions in South Dakota report savings rates to our database.
- You’re among South Dakota’s 18.0% of residents aged 65+ for whom liquid, accessible savings complement fixed-income holdings.
- No rate lock-in risk: Unlike a CD, your rate moves up with the market if rates rise further.
Consider an Alternative If…
- You want a locked-in, guaranteed return → South Dakota CD rates
- You want check-writing flexibility → South Dakota money market rates
- You need daily transaction access → South Dakota checking rates
South Dakota Financial Snapshot
Local demographics and economic context for savers — Source: U.S. Census Bureau
18.0% of residents are 65 or older, in line with the national average of 17.3%; a low unemployment rate of 2.9% reflects a strong local economy with solid savings capacity. At today’s SD high-yield savings average of 1.987%, saving 10% of the local median salary ($4,337/year) would earn an additional $86 annually in interest.
Data: U.S. Census Bureau and U.S. Bureau of Labor Statistics.
Savings Accounts vs. Other South Dakota Options
How high-yield savings accounts compare to other deposit products available at banks and credit unions in South Dakota.
| Feature | High-Yield Savings | Standard Savings | Money Market | CD (12-Month) |
|---|---|---|---|---|
| Current SD Avg APY | 1.987% | 0.759% | View MMA Rates | View CD Rates |
| Rate Type | Variable | Variable | Variable | Fixed for term |
| FDIC / NCUA Insured | ✓ Up to $250K | ✓ Up to $250K | ✓ Up to $250K | ✓ Up to $250K |
| Withdraw Anytime | ✓ Yes | ✓ Yes | ✓ Yes | ✗ Penalty applies |
| Check Writing | ✗ No | ✗ No | ✓ Often yes | ✗ No |
| Debit / ATM Card | Some institutions | ✗ Rarely | ✓ Often yes | ✗ No |
| Typical Min Deposit | $0 – $100 | $25 – $100 | $0 – $2,500 | $500 – $1,000 |
| Rate Risk | Rate may fall with Fed cuts | Rate may fall with Fed cuts | Rate may fall with Fed cuts | None — locked for term |
| Best For | Emergency fund, short-term goals, parking cash | Everyday saving, low-balance accounts | Active savers wanting flexibility + check writing | Locking in a rate for a defined period |
APY data reflects South Dakota averages tracked in our database as of August 29, 2026. Rates are variable and may differ by institution. See individual product pages for full details.
Savings Calculators for South Dakota
At SD’s top rate of 5.00% from Interfaith Federal Credit Union, a $10,000 deposit earns $500 annually. Enter your balance to see your exact return.
Savings Goal CalculatorA 3-month emergency fund for the median South Dakota earner is roughly $10,800. At 1.987% APY, saving $900/month gets you there in about 12 months. Set your target and see your exact timeline.
CD vs. High-Yield SavingsSouth Dakota’s high-yield savings average is 1.987% APY — variable and always accessible. A local CD may offer a higher fixed yield in exchange for locking in your deposit. Compare both side-by-side to find the better fit for your timeline.
Budget CalculatorBefore you can grow your savings, you need to know how much you can set aside each month. The median South Dakota earner makes $43,371/year. Track your income vs. expenses to find your monthly surplus — then put it to work at 1.987% APY.
Retirement PlannerA $25,000 high-yield savings balance earning 1.987% APY grows to roughly $37,056 over 20 years with compounding. See how your current savings trajectory lines up with your retirement income needs.
Methodology & Data Sources
Independent, Free, and Unbiased Rate Comparisons: MonitorBankRates.com is an independent rate comparison service. Our South Dakota savings rate tables are free for consumers to use, and we do not receive payment from any financial institution to be included or to be ranked in any particular order. Listings are based solely on the rates each institution publicly advertises on its own website.
A Note on Third-Party Rate Tools: Some pages on our site also feature rate comparison widgets and tools provided by third-party partners. These tools may include sponsored listings or affiliate links, and we may receive compensation when users click through them. We clearly label these widgets so you can tell at a glance which rates come from our independent MonitorBankRates.com tables and which come from our advertising partners.
Direct-Sourced & Verified Savings Rate Data: We aggregate savings account rates for South Dakota directly from the official websites of banks and credit unions using our proprietary rate aggregation technology and a dedicated team of rate updaters. Every savings rate displayed on MonitorBankRates.com is highly accurate and trustworthy.
Local, Regional, and National Coverage: Our systems constantly monitor the market to provide a complete picture of available yields in South Dakota. We feature a comprehensive mix of institutions — from neighborhood credit unions and competitive regional banks to large national institutions available to savers in SD.
Daily Updates & Time-Stamped Accuracy: Our rate updaters verify and update savings rates daily. Because savings account yields can fluctuate rapidly, every product listed features its own specific “last updated” date, giving you complete transparency.
Frequently Asked Questions about Savings Accounts in South Dakota
What is a High-Yield Savings Account (HYSA)?
Are savings accounts in South Dakota safe?
How often do savings rates change in South Dakota?
Do I need a minimum deposit to open a savings account?
What is the difference between a Savings Account and a Money Market Account?
Are online banks better than local banks in South Dakota?
How do I open a savings account in South Dakota?
Best Savings Rates in South Dakota
- Interfaith Federal Credit Union
Regular/Special Share Savings Accounts — 5.00% APY - OAB One American Bank
Savings+ — 3.30% APY - Bluestone Federal Credit Union
12 MO VARIABLE SHARE CERT. — 3.30% APY - SNB Security National Bank of SD
Sidekick Savings — 3.25% APY - Merchants State Bank
Traditional IRA Savings — 3.25% APY
Cities in South Dakota
