Earned Interest From a Savings Account in 2025? The IRS Expects Every Dollar Reported on the 2026 Tax Return

[Last Updated: March 30, 2026]

Did that savings account actually earn “free money” — or is the IRS quietly waiting for a cut of every dollar in interest? With high-yield savings accounts still offering rates between 4% and 5% APY heading into 2026, millions of Americans earned more interest income last year than they may realize.

Here’s the thing — the Internal Revenue Service treats bank interest as ordinary taxable income, no different from wages on a W-2. According to IRS Topic No. 403, all taxable and tax-exempt interest must be reported on a federal income tax return, even if no Form 1099-INT was received. That means a taxpayer who earned $8 in interest from a checking account is still legally required to report it, despite never receiving a form from the bank.

This guide on startaxoffice.org breaks down exactly how bank interest income gets taxed for the 2026 filing season (covering the 2025 tax year), which forms are involved, what the IRS looks for during automated matching, and — perhaps most importantly — what happens when interest goes unreported.

Key Takeaways

• The IRS considers all bank interest — from savings accounts, CDs, money market accounts, and even sign-up bonuses — as ordinary taxable income, regardless of the amount earned.
• Banks must issue Form 1099-INT for interest of $10 or more, but taxpayers are required to report all interest income, even amounts below $10.
• Interest income is taxed at ordinary federal income tax rates (10% to 37% for the 2026 tax year), not at the lower capital gains rate.
• Filing Schedule B becomes mandatory when total taxable interest or ordinary dividends exceed $1,500 for the year.
• Unreported interest income can trigger IRS automated matching notices (CP2000), accuracy-related penalties of 20%, and even backup withholding at 24%.

Why the IRS Treats Every Penny of Bank Interest as Taxable Income

A common misconception floating around social media — particularly on TikTok and Reddit — is that small amounts of bank interest are “too small to matter” for tax purposes. In reality, the Internal Revenue Code makes no exception for the size of an interest payment.

The IRS classifies interest income as ordinary income, which means it gets taxed at the same rates as wages, salaries, and tips. Unlike qualified dividends or long-term capital gains, which benefit from preferential tax rates, bank interest sits squarely in the ordinary income category and is subject to the full marginal tax rate of the filer.

How the IRS Defines “Interest Income” for Federal Tax Purposes

Under IRS rules, “interest income” includes far more than just the monthly deposit from a traditional savings account. The IRS considers the following as taxable interest income:

• Interest earned on savings accounts, including high-yield savings accounts
• Interest from certificates of deposit (CDs)
• Interest on money market deposit accounts
• Interest from U.S. Treasury bills, notes, and bonds (taxable at the federal level, but exempt from state and local income tax)
• Interest credited on tax refunds from federal, state, or local authorities
• Bank sign-up bonuses and promotional cash offers (classified as interest by most financial institutions)
• Dividends on deposits or share accounts in credit unions, cooperative banks, and mutual savings banks — even though they’re called “dividends,” the IRS treats them as interest

Worth noting, interest from Series EE and Series I U.S. savings bonds is generally deferred until the bonds mature or are redeemed, unless the bondholder elects to report it annually. An exclusion may also apply when proceeds from certain Series EE or Series I bonds issued after 1989 are used for qualified higher education expenses, as outlined in the Educational Savings Bond Program.

The $10 Threshold Myth — Even $1 Must Be Reported

One of the most persistent myths about bank interest is the belief that amounts under $10 don’t need to be reported. This confusion stems from the Form 1099-INT reporting threshold — banks are only required to send a 1099-INT when interest paid reaches $10 or more in a calendar year.

However, the taxpayer’s reporting obligation has no minimum. Even if a bank account earned $3 in interest and no 1099-INT was issued, that $3 must appear on Line 2b of Form 1040.

The IRS receives copies of every 1099-INT submitted by banks and financial institutions. Its Automated Underreporter (AUR) system cross-references these forms against individual tax returns, and discrepancies — even small ones — can trigger a CP2000 notice months or even years later.

Form 1099-INT Explained — What Each Box Means for the 2026 Tax Return

Form 1099-INT is the document financial institutions use to report interest income to both the taxpayer and the IRS. Understanding each box on this form is essential for accurate filing.

Box-by-Box Breakdown of Form 1099-INT

The form contains several numbered boxes, each reporting a different type of interest-related information. The table below breaks down the most commonly used boxes.

Box	Label	What It Reports	Where It Goes on Form 1040
Box 1	Interest Income	Total taxable interest earned (savings, CDs, money market, etc.)	Line 2b (or Schedule B if over $1,500)
Box 2	Early Withdrawal Penalty	Penalty for early withdrawal from a CD or time deposit	Schedule 1, Line 18 (above-the-line deduction)
Box 3	Interest on U.S. Savings Bonds and Treasury Obligations	Interest from Treasury bills, notes, bonds, and savings bonds	Line 2b (included in taxable interest)
Box 4	Federal Income Tax Withheld	Backup withholding at 24% (if applied)	Line 25d (credited against tax owed)
Box 8	Tax-Exempt Interest	Interest from municipal bonds (generally not subject to federal tax)	Line 2a (informational reporting only)
Box 9	Specified Private Activity Bond Interest	Tax-exempt interest subject to the Alternative Minimum Tax (AMT)	Form 6251 (AMT calculation)
Box 10	Market Discount	Market discount on bonds purchased below face value	Schedule B or Schedule D (depending on election)
Box 11	Bond Premium	Premium paid on taxable bonds (may offset interest income)	Schedule B (reduces interest reported)

Source: IRS — Form 1099-INT Instructions. Figures correct as of March 2026.

One detail that many filers overlook: the early withdrawal penalty in Box 2 is an above-the-line deduction. This means it reduces adjusted gross income (AGI) directly on Schedule 1, even if a filer takes the standard deduction rather than itemizing.

Key Deadlines — When Banks Must Send 1099-INT Forms

Financial institutions are required to furnish 1099-INT forms to recipients by January 31 each year. For the 2025 tax year, because January 31, 2026, fell on a Saturday, the deadline was extended to Monday, February 2, 2026.

If a 1099-INT has not arrived by mid-February, the first step is to check the bank’s online portal — many institutions now provide digital tax documents through their websites or apps. If the form still cannot be located, the IRS allows taxpayers to request a wage and income transcript using Form 4506-T, which shows all information returns filed under a specific Social Security Number or Individual Taxpayer Identification Number.

Keep in mind, not receiving a 1099-INT does not eliminate the obligation to report the interest.

How Bank Interest Gets Taxed at the 2026 Federal Tax Rates

Bank interest income is taxed as ordinary income. It is not subject to the preferential rates that apply to qualified dividends or long-term capital gains. Instead, it falls into whichever federal tax bracket applies to the filer’s total taxable income for the year.

2026 Tax Brackets and How They Apply to Interest Income

The table below shows the 2026 federal income tax brackets for Single filers and Married Filing Jointly, as published in IRS Revenue Procedure 2025-32. Interest income stacks on top of all other ordinary income (wages, business income, etc.) and is taxed at the filer’s marginal rate.

Tax Rate	Single Filer — Taxable Income	Married Filing Jointly — Taxable Income
10%	$0 – $12,400	$0 – $24,800
12%	$12,401 – $50,400	$24,801 – $100,800
22%	$50,401 – $105,700	$100,801 – $211,400
24%	$105,701 – $201,775	$211,401 – $403,550
32%	$201,776 – $256,225	$403,551 – $512,450
35%	$256,226 – $640,600	$512,451 – $768,700
37%	Over $640,600	Over $768,700

Source: IRS Revenue Procedure 2025-32. Figures are for the 2026 tax year (returns filed in 2027). Tax rates and thresholds are subject to change based on annual IRS inflation adjustments and legislative updates.

So what does this mean in real dollars? Consider a single filer with $55,000 in taxable income from wages who also earned $2,000 in savings account interest. That $2,000 in interest effectively sits in the 22% bracket, meaning approximately $440 of it goes to federal income tax. The exact amount depends on the filer’s full taxable income picture, including any deductions applied.

For high earners, there is an additional layer. The Net Investment Income Tax (NIIT) imposes a 3.8% surtax on net investment income — including bank interest — for single filers with modified adjusted gross income (MAGI) above $200,000 and married couples filing jointly with MAGI above $250,000. These NIIT thresholds are not adjusted for inflation, meaning more taxpayers are affected each year as incomes rise.

State Income Tax on Interest — Which States Tax It and Which Don’t

Beyond federal taxes, most states also tax interest income as ordinary income under their own state income tax systems. However, nine states impose no state income tax at all: Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington, and Wyoming.

Taxpayers residing in these states only need to report interest income on the federal return. Those in states with income tax should expect to report interest income on both federal and state returns.

One important exception: interest from U.S. Treasury securities (bills, notes, and bonds) is exempt from state and local income taxes under federal law, though it remains fully taxable at the federal level. This can make Treasury securities a more tax-efficient option compared to bank savings for residents of high-tax states like California or New York.

Schedule B — When More Than $1,500 in Interest Triggers Extra Reporting

Schedule B (Form 1040) is a supplemental form used to report detailed interest and dividend income. Not every filer needs it — but crossing certain thresholds makes it mandatory.

Who Must File Schedule B and How to Complete It

According to the IRS instructions for Schedule B, the form is required when:

• Total taxable interest income exceeds $1,500 for the year
• Total ordinary dividends exceed $1,500 for the year
• The filer received interest from a seller-financed mortgage where the buyer used the property as a personal residence
• The filer has a financial interest in, or signature authority over, a foreign financial account (triggering Part III questions related to FBAR and FATCA)

The $1,500 threshold applies to the combined total across all accounts and institutions — not per account. With high-yield savings accounts paying 4% to 5% APY, reaching the $1,500 mark requires only about $30,000 to $37,500 in deposits — a threshold many savers now cross easily.

Completing Schedule B involves three parts:

1. Part I — Interest: List every payer (bank name) and the corresponding interest amount from each 1099-INT received. Subtotal these amounts, subtract any excludable savings bond interest (calculated on Form 8815), and carry the result to Form 1040, Line 2b.

2. Part II — Ordinary Dividends: Similar listing process for dividend income from Form 1099-DIV. This section is separate from interest but included on the same schedule.

3. Part III — Foreign Accounts and Trusts: Answer “yes” or “no” to questions about foreign financial accounts. A “yes” answer may trigger additional filing requirements, including the Report of Foreign Bank and Financial Accounts (FBAR, FinCEN Form 114) and potentially Form 8938 under the Foreign Account Tax Compliance Act (FATCA).

Five Common Mistakes That Trigger IRS Notices on Interest Income

Interest income may seem straightforward, but errors in reporting are among the most common issues the IRS catches through its automated systems. Below are the five mistakes that most frequently lead to IRS notices.

1. Failing to report interest below $10. As discussed earlier, the $10 threshold only applies to the bank’s obligation to issue a 1099-INT. The taxpayer must report all interest, regardless of amount.

2. Ignoring interest from multiple accounts. Taxpayers with accounts at several banks sometimes forget one or two. The IRS, however, receives copies from every institution and matches them all.

3. Overlooking interest on tax refunds. When the IRS or a state tax authority pays interest on a delayed refund, that interest is taxable income. It is reported on a separate 1099-INT and must be included on the return.

4. Mishandling joint account interest. When a 1099-INT is issued under one person’s SSN for a joint account, but the interest actually belongs partly to another person, the filer is considered a “nominee recipient.” The full amount must be reported on Schedule B, with the other person’s share subtracted as a “nominee distribution.” The filer must then issue a separate 1099-INT to the actual owner.

5. Not reporting bank sign-up bonuses. Many financial institutions classify cash bonuses for opening new accounts as interest income. These bonuses appear on a 1099-INT (Box 1) or, in some cases, a 1099-MISC. Either way, the amount is taxable.

Missing 1099-INT? The IRS Still Knows

The IRS receives information returns directly from banks and financial institutions. Its Automated Underreporter (AUR) program systematically compares Form 1099-INT data against filed tax returns. When the system detects a mismatch — even as small as $10 — it generates a CP2000 notice proposing additional tax, plus interest and potential penalties.

A CP2000 is not a formal audit. It is a proposed adjustment based on third-party information the IRS already has. Taxpayers who receive a CP2000 typically have 30 days to respond — either agreeing with the adjustment or providing documentation to dispute it.

The safest approach is to request a wage and income transcript from IRS.gov before filing. This transcript shows all 1099-INT, W-2, and other information returns filed under the taxpayer’s SSN, providing a complete picture before the return is submitted.

Backup Withholding at 24% — What It Means and How to Avoid It

Backup withholding is a mechanism the IRS uses to ensure tax collection on interest income when certain conditions are met. When backup withholding applies, the bank or financial institution withholds 24% of all interest payments and sends that amount directly to the IRS.

Backup withholding is triggered when:

• A taxpayer fails to provide a valid Taxpayer Identification Number (TIN) to the bank (via Form W-9)
• The IRS notifies the bank that the TIN provided is incorrect (B Notice process)
• The taxpayer has been identified by the IRS as having underreported interest or dividends in prior years
• The taxpayer failed to certify on Form W-9 that they are not subject to backup withholding

If backup withholding has been applied, the amount withheld appears in Box 4 of Form 1099-INT. This amount is credited against the total tax liability on Form 1040, Line 25d — essentially functioning as a prepayment of taxes.

To stop backup withholding, the issue that triggered it must be resolved — typically by providing a correct TIN to the bank via a new Form W-9 or by resolving the underreporting issue with the IRS.

Legal Ways to Reduce Tax on Interest Income

While interest income is fully taxable as ordinary income, several legitimate strategies can help reduce the overall tax impact. These are general approaches — individual circumstances vary, and consulting a CPA or enrolled agent is recommended before making any tax-related decisions.

Tax-Advantaged Accounts — Roth IRA, HSA, and 529 Plans

One of the most effective ways to shield interest income from taxation is to hold interest-bearing assets inside a tax-advantaged account:

• Roth IRA: Contributions are made with after-tax dollars, but all growth — including interest — is tax-free upon qualified withdrawal. For taxpayers already contributing to a Roth IRA, holding high-yield savings or CDs within a Roth brokerage account could eliminate federal tax on that interest entirely.

• Health Savings Account (HSA): Contributions to an HSA are tax-deductible, growth is tax-free, and qualified withdrawals for medical expenses are also tax-free — a triple tax advantage. HSA-eligible taxpayers can use this account to hold interest-bearing investments with no current tax on the earnings.

• 529 Education Savings Plan: Interest and investment growth within a 529 plan are not subject to federal income tax when used for qualified education expenses. This makes 529 plans a tax-efficient option for families saving for education costs.

• Traditional IRA and 401(k): Contributions to traditional tax-deferred accounts reduce current taxable income, and growth is not taxed until withdrawal. However, distributions in retirement are taxed as ordinary income.

Municipal Bonds and Treasury Securities — Federal vs State Exemptions

For taxpayers in higher tax brackets, the type of interest-bearing investment can significantly affect after-tax returns:

• Municipal bonds generally produce interest that is exempt from federal income tax. If the bond is issued within the filer’s state of residence, the interest may also be exempt from state and local tax. However, some private activity bond interest may be subject to the Alternative Minimum Tax (AMT).

• U.S. Treasury securities (bills, notes, bonds, and I Bonds) produce interest that is subject to federal income tax but exempt from state and local income tax. For residents of high-tax states, this exemption can be worth 5% to 13% in state tax savings compared to bank interest.

The table below compares the tax treatment of common interest-bearing instruments.

Interest Source	Federal Tax	State Tax	NIIT (3.8%)
Bank Savings / HYSA / CD / Money Market	Yes	Yes (most states)	Yes (if above MAGI threshold)
U.S. Treasury Securities (bills, notes, bonds)	Yes	No	Yes (if above MAGI threshold)
Series I and Series EE Savings Bonds	Yes (deferred until redemption)	No	Yes (if above MAGI threshold)
Municipal Bonds (in-state)	No	No (typically)	No
Municipal Bonds (out-of-state)	No	Yes (most states)	No
Roth IRA (interest inside account)	No (qualified withdrawal)	No (qualified withdrawal)	No

Source: IRS Topic No. 403, Publication 550. Figures correct as of March 2026. Tax rates and thresholds are subject to change based on annual IRS inflation adjustments and legislative updates.

What Happens If Bank Interest Goes Unreported — IRS Penalties and CP2000 Notices

The consequences of failing to report bank interest income can escalate quickly, even for relatively small amounts. The IRS has multiple enforcement mechanisms designed to catch unreported interest.

CP2000 Notice (Automated Underreporter Program). This is the most common consequence. The IRS sends a CP2000 when its records show interest income that does not appear on the filed return. The notice proposes additional tax owed, plus interest on the underpayment.

Accuracy-Related Penalty. Under Internal Revenue Code Section 6662, the IRS can assess a penalty of 20% on the portion of the underpayment attributable to negligence or substantial understatement of income. Failing to report interest income that was clearly documented on a 1099-INT generally qualifies as negligence.

Underpayment Interest. The IRS charges interest on unpaid taxes from the original due date until the balance is paid in full. For the first quarter of 2026, the IRS underpayment interest rate for individuals was 7% per year, compounded daily, dropping to 6% for the second quarter of 2026, based on IRS published guidelines as of March 2026 and subject to change.

Failure-to-File Penalty. If unreported interest income results in a tax return that should have been filed but was not — for example, a dependent whose only income was interest above the filing threshold — the failure-to-file penalty is 5% of the unpaid tax per month, up to 25%.

The bottom line: the IRS already has copies of all 1099-INT forms. Attempting to omit interest income provides no advantage and creates significant risk.

Protecting Against Tax-Related Fraud and Scams

Tax season brings an uptick in scams targeting taxpayers, including phishing emails impersonating the IRS, fraudulent calls demanding immediate payment, and identity theft schemes where criminals file false returns using stolen Social Security Numbers.

The IRS will never initiate contact by email, text message, or social media to request personal or financial information. All legitimate IRS correspondence arrives by U.S. mail.

Taxpayers who suspect tax-related identity theft or fraud should take the following steps:

• Report IRS impersonation scams to the Treasury Inspector General for Tax Administration (TIGTA) at 1-800-366-4484
• Report identity theft to the IRS Identity Protection Specialized Unit at 1-800-908-4490
• Request an Identity Protection PIN (IP PIN) through IRS.gov to prevent unauthorized filings — available to all taxpayers
• Report online fraud to the Federal Trade Commission at reportfraud.ftc.gov
• General IRS inquiries can be directed to 1-800-829-1040 (individual tax questions)
• Taxpayer Advocate Service (TAS) can assist taxpayers experiencing financial hardship or systemic problems with the IRS — visit taxpayeradvocate.irs.gov or call 1-877-777-4778

Closing

Bank interest income — whether $5 from a checking account or $5,000 from a high-yield savings account — is taxable income in the eyes of the IRS. For the 2025 tax year (returns filed in 2026), the obligation to report remains the same as always: every dollar of interest must appear on Form 1040, regardless of whether a 1099-INT was received.

With the 2026 standard deduction rising to $16,100 for single filers and $32,200 for married couples filing jointly, some filers may find that their total income — including interest — still falls below the filing threshold. But for those who do owe, understanding how interest stacks onto other income and hits the applicable tax bracket can help avoid surprises.

Disclaimer: The information on startaxoffice.org is for general informational purposes only and does not constitute tax, legal, or financial advice. Tax laws, rates, and filing requirements change frequently. Always consult a qualified tax professional, CPA, or enrolled agent before making tax decisions. This site is not affiliated with the IRS, any state tax authority, or any tax preparation company.

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Sources

• IRS — Topic No. 403, Interest Received
• IRS — About Form 1099-INT, Interest Income
• IRS — About Schedule B (Form 1040)
• IRS — 2026 Tax Year Inflation Adjustments (Revenue Procedure 2025-32)
• IRS — Topic No. 559, Net Investment Income Tax
• Taxpayer Advocate Service