LIVE
30Y FIXED6.85%↑ 0.02·15Y FIXED6.12%↓ 0.01·REFI 30Y6.78%↑ 0.01·HELOC9.20%0.00·JUMBO 30Y7.05%↑ 0.03·HYSA TOP4.85%↓ 0.05·12M CD5.10%0.00·24M CD4.85%↓ 0.02·5Y CD4.40%↑ 0.01·MMA TOP4.65%0.00·AUTO 60M NEW7.10%↓ 0.02·AUTO 60M USED8.45%↑ 0.04·PERSONAL EXC.8.20%0.00·10Y TREASURY4.32%↑ 0.01·30Y FIXED6.85%↑ 0.02·15Y FIXED6.12%↓ 0.01·REFI 30Y6.78%↑ 0.01·HELOC9.20%0.00·JUMBO 30Y7.05%↑ 0.03·HYSA TOP4.85%↓ 0.05·12M CD5.10%0.00·24M CD4.85%↓ 0.02·5Y CD4.40%↑ 0.01·MMA TOP4.65%0.00·AUTO 60M NEW7.10%↓ 0.02·AUTO 60M USED8.45%↑ 0.04·PERSONAL EXC.8.20%0.00·10Y TREASURY4.32%↑ 0.01·
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Updated 4 minutes ago

Best HYSA in South Dakota

South Dakota residents have access to the same top-rated national high-yield savings accounts as anyone else in the country. With a median household income of $72,380 in South Dakota, earning 4.85% APY on idle cash adds up fast. No state income tax — interest is federally taxed only. All accounts listed below are FDIC-insured up to $250,000 per depositor.

Open Bask BankCalculate your earnings
Top RatedAvailable in South Dakota
Bask Bank High-Yield Savings
No minimum balance. No monthly fees. FDIC-insured up to $250K per depositor. Open online in minutes from anywhere in South Dakota.
No minimum deposit·No fees·FDIC-insured·Online account
Current APY
4.85%
View offer
Savings Rates · Live

Top HYSA rates for South Dakota residents in 2026

These are national online banks. Every account is open to South Dakota residents and every rate is FDIC-backed.

Bank
APY
Bask Bank
Top APY
No minimum balance. No monthly fees. FDIC-insured up to $250K per depositor.
4.85%
Bread Savings
$100 minimum opening deposit. No monthly fees. FDIC-insured.
4.75%
Marcus by Goldman Sachs
No minimum balance. No fees. Backed by Goldman Sachs Bank USA.
4.50%
Ally Bank
No minimum balance. No monthly fees. 24/7 customer service.
4.45%
SoFi
Direct deposit required for top rate. No minimum balance.
4.40%
Discover Bank
No minimum balance. No fees. Same-day transfers available.
4.30%
CIT Bank
$100 minimum. No monthly service charge. FDIC-insured.
4.25%
American Express
No minimum balance. No fees. Easy online access.
4.15%

Rates as of April 2026. APY subject to change. All accounts FDIC-insured up to $250,000 per depositor per institution. Not a recommendation.

About South Dakota

HYSA in South Dakota: what you need to know

South Dakota's median household income sits at $72,380. At that income level, keeping even three months of expenses in a traditional savings account earning 0.5% instead of a top-tier HYSA at 4.85% can cost hundreds of dollars per year in foregone interest. The math is straightforward: a $20,000 emergency fund at 4.85% APY earns roughly $970 per year. The same balance at a typical brick-and-mortar rate earns about $100.

South Dakota has a number of well-regarded local financial institutions, including First Bank & Trust, Great Western Bank, Wells Fargo. These banks serve South Dakota communities well for everyday banking, mortgages, and local business relationships. However, their savings rates rarely match what national online banks offer. First Bank & Trust, for instance, is one of the more recognized names in South Dakota banking, but its savings APY typically runs well below the 4%+ range offered by online-only competitors.

On the tax side: No state income tax — interest is federally taxed only. This applies to interest earned on any savings account, including HYSA accounts held at out-of-state online banks. The good news is that even after accounting for federal taxes, the net yield from a 4.85% HYSA almost always beats what local South Dakota banks offer before taxes. You keep more money either way.

Online banks are available to all South Dakota residents regardless of which corner of the state you live in. You open the account online, link your existing South Dakota checking account, and transfers typically settle in one to two business days. There are no physical branch requirements and no state-specific restrictions that would prevent a South Dakota resident from opening any of the accounts listed on this page.

FAQ

Common questions from South Dakota savers

Can I open an HYSA from another state if I live in South Dakota?
Yes. Every account on this list is open to South Dakota residents. Online banks are federally chartered or state-chartered institutions that operate nationwide. There is no requirement to use a bank headquartered in South Dakota. You just need a U.S. address, a Social Security number, and a linked bank account to fund the deposit. The entire process takes about ten minutes online.
How is HYSA interest taxed in South Dakota?
Interest income from a high-yield savings account is taxable at the federal level as ordinary income, the same as wages. At the state level: No state income tax — interest is federally taxed only. Your bank will send you a 1099-INT form each January covering any interest earned in the prior year. If you earned more than $10 in interest, you are required to report it on your federal return.
Are local South Dakota banks better than online HYSAs?
It depends on what you value. Local South Dakota banks like First Bank & Trust offer in-person service, local lending relationships, and community ties that online banks cannot replicate. For everyday savings, however, national online HYSAs almost always offer significantly higher APYs. Many South Dakota residents keep their primary checking at a local bank and move excess savings to an online HYSA to earn more without giving up their local banking relationship.
Are online HYSAs FDIC-insured the same way as local banks?
Yes. Every account listed on this page is insured by the Federal Deposit Insurance Corporation (FDIC) up to $250,000 per depositor, per institution, per ownership category. This is exactly the same coverage you get at any brick-and-mortar bank in South Dakota. FDIC insurance has covered depositors in every bank failure since 1933. The physical location of the bank does not affect your coverage.
Is First Bank & Trust competitive with online HYSA rates?
First Bank & Trust is one of the more established financial institutions serving South Dakota, but like most traditional banks, its savings rates typically lag behind online-only competitors by two to four percentage points. The overhead of maintaining physical branches, staff, and ATM networks limits how much traditional banks can pay on deposits. Online banks pass those savings directly to depositors in the form of higher APYs. If you already bank with First Bank & Trust, you can still open an online HYSA as a secondary account and transfer savings there to earn more.
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