Interest on money in a savings account is taxed by the federal government as ordinary income, at whatever rate applies to your tax bracket. For the 2026 tax year, that means somewhere between 10% and 37%, stacked on top of your wages and other income. Most states with an income tax add their own layer. The tax on savings interest applies to every dollar the bank credits you, whether you withdraw it or leave it to compound, and the bank reports the amount to the IRS before you ever file.
How the Federal Rate Actually Works
Interest income does not get the lower rates that apply to long-term capital gains or qualified dividends. It is ordinary income, which means it stacks on top of your wages, self-employment earnings, and anything else taxed at ordinary rates. The total pushes you into a bracket, and the interest is taxed at whatever bracket its dollars land in. For 2026, federal ordinary-income rates run from 10% up to 37%.1Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026
Someone earning $60,000 in salary and $2,000 in savings interest is taxed on $62,000. The interest gets no separate treatment; it fills the top of the pile. For most people, that means their savings interest is taxed at the same rate as the last dollar of their paycheck.
The 2026 standard deduction is $16,100 for single filers and $32,200 for married couples filing jointly.1Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026 If your total income including interest falls below that threshold, you may owe no federal income tax at all.
Federal law defines gross income broadly enough to sweep in interest from nearly any source: savings accounts, money market accounts, CDs, corporate bonds, and Treasury securities.2Office of the Law Revision Counsel. 26 US Code 61 – Gross Income Defined Reinvesting the interest back into the same account changes nothing. If the bank credits it, the IRS considers it earned.
How the Bank Reports It and How You Report It
Any bank that pays you $10 or more in interest during the year must send you Form 1099-INT showing the total.3Internal Revenue Service. About Form 1099-INT, Interest Income These forms typically show up in January or early February, on paper or through your bank’s portal. A copy also goes to the IRS, so the agency knows what you earned before you file.
If your interest totaled less than $10, you probably won’t get a 1099-INT, but you still owe tax on every cent. The $10 figure is a reporting trigger for the bank, not an exemption for you. Small amounts across several accounts can add up and produce a mismatch with IRS records.
One benefit worth knowing: if you cashed out a CD early and the bank hit you with an early-withdrawal penalty, that penalty is deductible as an adjustment to income on your federal return. The amount appears in Box 2 of Form 1099-INT, and you can take the deduction whether or not you itemize.
State Tax and the Treasury Exception
Most states with an income tax treat savings interest as ordinary income at their regular rates. If you live in a state with no personal income tax, you skip this layer entirely.
Two exceptions can meaningfully change the math. Interest on U.S. Treasury securities is exempt from all state and local income taxes, even though it remains fully taxable federally.4Internal Revenue Service. Topic No. 403, Interest Received The same exemption covers Series EE and Series I savings bonds.5TreasuryDirect. Tax Information for EE and I Bonds In a high-tax state, that makes Treasuries slightly more tax-efficient than a savings account paying the same nominal rate.
Interest on municipal bonds issued within your state is often exempt from both federal and state income tax. Bonds issued by other states are usually still taxable at the state level. Rules for senior and low-income exemptions vary widely, so check your state’s revenue department for the specifics.
The Extra 3.8% for Higher Earners
Above certain income levels, savings interest picks up an additional 3.8% net investment income tax on top of the regular rate.6Internal Revenue Service. Questions and Answers on the Net Investment Income Tax The surtax kicks in once modified adjusted gross income crosses:
- $200,000 for single or head-of-household filers
- $250,000 for married couples filing jointly
- $125,000 for married individuals filing separately
The 3.8% applies to the lesser of your net investment income or the amount your income exceeds the threshold.7Office of the Law Revision Counsel. 26 US Code 1411 – Imposition of Tax These thresholds are set by statute and do not adjust for inflation, so more taxpayers cross them each year. Tax-exempt municipal bond interest is excluded from the calculation.
How to Reduce or Avoid the Tax Legally
The cleanest way to shrink the tax on savings interest is to earn it inside an account built for the purpose.
Tax-Deferred Accounts
Traditional IRAs and traditional 401(k)s let interest and other earnings compound without any current tax; you pay ordinary income tax only when you withdraw.8Internal Revenue Service. Individual Retirement Arrangements (IRAs) For 2026, IRA contributions cap at $7,500, plus a $1,100 catch-up if you’re 50 or older; 401(k) elective deferrals cap at $24,500.9Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026, IRA Limit Increases to $7,500 Pulling money out before age 59½ generally adds a 10% tax on top of the regular income tax, with narrow exceptions.10Office of the Law Revision Counsel. 26 USC 72 – Annuities; Certain Proceeds of Endowment and Life Insurance Contracts
Tax-Free Accounts
Roth IRAs and Roth 401(k)s run the opposite way. You pay tax on the money before it goes in, but qualified withdrawals in retirement are entirely tax-free, interest and growth included. Health savings accounts offer three separate tax benefits at once: deductible contributions, tax-free growth, and tax-free withdrawals for qualified medical expenses.11Internal Revenue Service. Publication 969 – Health Savings Accounts and Other Tax-Favored Health Plans For 2026, HSA contribution limits are $4,400 for self-only coverage and $8,750 for family coverage.12Internal Revenue Service. Revenue Procedure 2025-19 You need a high-deductible health plan to qualify.
Tax-Exempt Bonds
Interest on state and local government bonds is generally excluded from federal gross income.13Office of the Law Revision Counsel. 26 US Code 103 – Interest on State and Local Bonds A municipal bond yielding 4% tax-free can beat a savings account yielding 5% before taxes, depending on your bracket. Certain private-activity bonds may still trigger the alternative minimum tax, so the exemption isn’t always total.
Series EE and Series I savings bonds have their own carve-out: interest can be excluded from federal income tax if the proceeds pay for qualified higher education expenses. Income limits apply, and the bonds must be registered in the name of a taxpayer who was at least 24 when the bond was issued. For 2025, the exclusion begins phasing out at $99,500 in modified adjusted gross income for single filers and $149,250 for joint filers; 2026 thresholds had not been published at the time of writing.
Kiddie Tax on a Child’s Savings
Opening a savings account in a child’s name does not automatically shelter the interest. For 2026, the first $1,350 of a child’s unearned income is covered by the child’s standard deduction and taxed at zero. The next $1,350 is taxed at the child’s own rate. Anything above $2,700 is taxed at the parent’s marginal rate.14Internal Revenue Service. Topic No. 553, Tax on a Child’s Investment and Other Unearned Income The rule applies to children under 18, and in some cases to full-time students under 24 who don’t provide more than half their own support. The tax is calculated on Form 8615. A small custodial account is fine; parking large sums there won’t dodge much.
When the Bank Withholds 24% Before You See It
In a few situations, the bank will withhold 24% of your interest and send it directly to the IRS. This is backup withholding, and it’s triggered when:15Office of the Law Revision Counsel. 26 USC 3406 – Backup Withholding
- You didn’t provide a valid Social Security number or taxpayer identification number on your W-9.
- The IRS told the bank the TIN on file doesn’t match its records.
- The IRS flagged you for previously underreporting interest or dividend income.
Backup withholding is not a separate tax. It’s an advance on your regular tax bill, and any excess comes back as part of your refund. The fastest way to stop it is a corrected W-9 to your bank, though if an IRS notice caused it, withholding continues until the agency clears the account.
Estimated Payments if Withholding Doesn’t Cover It
Savings interest can push your tax bill high enough that you owe quarterly estimated payments rather than settling up in April. The trigger: expecting to owe $1,000 or more after subtracting withholding and credits.16Internal Revenue Service. Estimated Taxes You can avoid the underpayment penalty by paying at least 90% of your current-year tax through withholding and estimates, or 100% of last year’s tax (110% if your adjusted gross income exceeded $150,000). Salaried workers with modest interest usually clear the bar through payroll withholding. Retirees living on savings, or anyone sitting on a large high-yield balance, should run the numbers, because the underpayment penalty behaves like interest and accrues every quarter you fall short.
What Happens if You Don’t Report It
Missing a small 1099-INT usually produces a CP2000 notice from the IRS proposing additional tax and interest. The accuracy-related penalty for understatements is typically 20% of the underpayment.
Deliberately hiding interest is a different matter. Tax evasion is a felony carrying a maximum fine of $100,000 and up to five years in prison.17Office of the Law Revision Counsel. 26 USC 7201 – Attempt to Evade or Defeat Tax Since the IRS already has a copy of every 1099-INT, unreported interest is among the easiest discrepancies for the agency to find. For most taxpayers the real risk is not prosecution but the combination of back taxes, interest, and the 20% penalty, which turns a small oversight into a considerably larger bill than the tax itself.