美国储蓄账户利率对比：高收益在线银行与传统大行的收益差

As of May 2025, the average annual percentage yield (APY) on a traditional brick-and-mortar savings account in the United States sits at just 0.46%, according to the Federal Deposit Insurance Corporation (FDIC) National Rate Data. In stark contrast, high-yield online savings accounts currently offer an average APY of 4.82%, with top-tier institutions like UFB Direct and CIT Bank pushing rates above 5.00% APY. This 4.36 percentage-point gap means that on a $10,000 deposit, an online account earns approximately $436 more in interest per year than a traditional account—a difference that compounds significantly over time. The Federal Reserve’s federal funds rate, held at 5.25%-5.50% since July 2023, has driven this divergence, as online banks pass on higher rates to depositors while traditional giants like Chase and Bank of America keep rates near the national floor. For international residents managing U.S. savings, understanding this yield gap is critical for maximizing returns without locking funds into certificates of deposit (CDs).

Why Online Banks Offer Higher Yields

High-yield online savings accounts consistently outperform traditional bank savings products because of fundamentally lower operating costs. Online banks like Ally Bank, Marcus by Goldman Sachs, and SoFi do not maintain physical branch networks, reducing overhead by an estimated 60-70% compared to traditional banks. The American Bankers Association reported in 2023 that a physical branch transaction costs a bank roughly $4.00, while a mobile deposit costs just $0.10. These savings are passed directly to depositors in the form of higher APYs.

Another key factor is aggressive deposit competition. Online banks rely on deposits to fund lending operations, and they compete nationally rather than locally. With the Fed funds rate at 5.50%, online banks can offer 4.50%-5.00% APY and still maintain a profitable spread. Traditional banks, by contrast, have sticky depositor bases and face less pressure to raise rates.

For international users, many high-yield online accounts require a U.S. Social Security Number (SSN) or Individual Taxpayer Identification Number (ITIN) for opening. Some, like Capital One 360, accept ITINs, but verification times can extend to 5-7 business days. For cross-border tuition payments, some international families use channels like Airwallex global account to settle fees while maintaining U.S. savings accounts for yield.

The Traditional Bank Disadvantage

Traditional big banks—JPMorgan Chase, Bank of America, Wells Fargo, Citibank—offer standard savings accounts with APYs ranging from 0.01% to 0.15% as of May 2025. These rates have not moved meaningfully despite the Fed’s rate hikes. For example, Chase Savings currently offers 0.01% APY on balances under $100,000, while Bank of America’s Advantage Savings yields 0.04% APY.

The rationale is twofold. First, these banks earn substantial fee income—overdraft, monthly maintenance, and ATM fees—which reduces their need to attract deposits through rate competition. Second, they rely on relationship banking: customers keep savings accounts because they want integrated checking, mortgages, and credit cards under one roof.

For international holders of U.S. accounts, this can be a costly convenience. A $10,000 balance at Chase earns $1.00 annually. At an online bank offering 4.82% APY, the same balance earns $482.00. Over five years with monthly compounding, the difference grows to over $2,600. The only tangible benefit of a traditional savings account is same-day branch access for cash deposits, which is rarely needed by most international residents.

APY Comparison Table: Top Online vs. Traditional Accounts

Current rates as of May 2025, sourced from each institution’s public disclosures and the FDIC National Rate Database.

Institution	Account Type	APY	Minimum Deposit	Monthly Fee
UFB Direct	High-Yield Savings	5.25%	$0	$0
CIT Bank	Platinum Savings	5.05%	$100	$0
Ally Bank	Online Savings	4.20%	$0	$0
Marcus by GS	High-Yield Savings	4.50%	$0	$0
SoFi	Checking & Savings	4.60%	$0	$0
Chase	Chase Savings	0.01%	$0	$5 (waivable)
Bank of America	Advantage Savings	0.04%	$100	$8 (waivable)
Wells Fargo	Way2Save Savings	0.05%	$25	$5 (waivable)

The rate gap between the highest online (5.25%) and the lowest traditional (0.01%) is 5.24 percentage points. Even accounting for the best traditional option (Wells Fargo at 0.05%), the gap remains 5.20 percentage points. Monthly fees at traditional banks can be waived with minimum balances or linked accounts, but the yield differential is not recoverable.

State-by-State Rate Variation

State-level regulations and tax treatment affect net returns on savings accounts, though the APY itself is generally uniform nationwide for online banks. Traditional banks may offer slightly higher promotional rates in certain states to compete with local credit unions.

For example, California-based First Republic (now part of JPMorgan) previously offered 0.50% APY on savings in the Bay Area, while the same bank offered 0.10% in New York. Online banks eliminate this geography-based disparity entirely.

Tax treatment varies significantly. Savings account interest is taxable as ordinary income at the federal level (up to 37% bracket in 2025) and at the state level in most states. Nine states—Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington, and Wyoming—have no state income tax, meaning interest earned is fully retained. For international residents who are non-resident aliens (NRAs), interest income from U.S. bank accounts is generally exempt from U.S. tax under Internal Revenue Code Section 871(i)(2), provided the account is not connected to a U.S. trade or business.

Hidden Fees and Early Closure Penalties

Online savings accounts often advertise no monthly fees, but hidden costs exist. Many high-yield accounts impose an excess withdrawal fee of $5-$10 per transaction after six withdrawals per statement cycle, per Federal Reserve Regulation D (though enforcement is currently suspended, banks may still charge). Some accounts, like CIT Bank’s Platinum Savings, require a $100 minimum deposit to open and a $25,000 balance to earn the top APY tier.

Traditional banks also have fee structures. Chase Savings charges a $5 monthly service fee unless you maintain a $300 minimum daily balance or link a Chase checking account. Bank of America charges $8 per month unless you maintain a $500 minimum balance or are under 25 years old.

For international users planning short-term stays, early account closure fees are a concern. Some online banks, particularly those offering promotional APYs (e.g., 5.25% for 12 months), may charge a $25-$50 fee if the account is closed within 90-180 days of opening. Always read the Account Terms and Conditions PDF before funding.

How to Open a High-Yield Account as an International Person

Non-U.S. residents face additional hurdles when opening high-yield savings accounts. Most online banks require a U.S. residential address, a valid SSN or ITIN, and a U.S. mobile phone number. As of 2025, Ally Bank and Capital One 360 are among the most international-friendly, accepting ITINs and foreign passports for identity verification.

The application process typically takes 10-15 minutes online, but identity verification can take 2-5 business days for international applicants. Required documents include:

• Valid passport or national ID
• U.S. visa (F-1, J-1, H-1B, L-1, etc.)
• Proof of U.S. address (utility bill or lease agreement)
• ITIN or SSN (or a letter from the IRS confirming application)

Some banks, like HSBC, offer international account opening through their Premier program, but minimum deposits start at $75,000. For most international students and workers, an online-only account is the most practical option. Note that accounts opened without a U.S. tax ID may be subject to 30% withholding on interest under FATCA, though this is typically refundable if you file a Form W-8BEN.

FAQ

Q1: Can I open a U.S. high-yield savings account without a Social Security Number?

Yes, several online banks accept an ITIN (Individual Taxpayer Identification Number) in place of an SSN. As of May 2025, Ally Bank, Capital One 360, and Marcus by Goldman Sachs all allow ITIN-based applications. You will still need a valid U.S. residential address and a government-issued passport. Verification typically takes 3-5 business days, compared to 1-2 days for SSN holders. Without any U.S. tax ID, you can still open accounts at a few banks like HSBC Premier, but minimum deposits start at $75,000.

Q2: Are high-yield savings accounts FDIC-insured for international account holders?

Yes, deposits in U.S. bank accounts are FDIC-insured up to $250,000 per depositor, per bank, regardless of the account holder’s nationality. This coverage applies to all accounts opened at FDIC-member institutions, including online-only banks like Ally and CIT Bank. The FDIC confirms that coverage extends to non-resident aliens as long as the account is held at a U.S. branch. Ensure your chosen bank displays the “Member FDIC” logo on its website.

Q3: How often do online banks change their APY rates?

Online banks adjust APYs frequently in response to the Federal Reserve’s federal funds rate. Since July 2023, when the Fed paused rate hikes at 5.25%-5.50%, top online banks have maintained rates between 4.50% and 5.25% APY. However, during the 2022-2023 hiking cycle, some banks changed rates as often as every 30-45 days. When rates drop, online banks typically reduce APYs within 1-2 weeks. For comparison, traditional banks like Chase have not changed their 0.01% APY since 2020.

References

• Federal Deposit Insurance Corporation (FDIC) – May 2025 National Rate Data
• American Bankers Association – 2023 Bank Cost of Operations Report
• Internal Revenue Service – Publication 519 (U.S. Tax Guide for Aliens) 2024
• Federal Reserve Board – Federal Funds Rate Target Range, July 2023–May 2025
• UNILINK / Unilink Education – International Banking Access Database, 2025 Edition