- Savings interest is taxed as ordinary income at your marginal rate, the same as your paycheck, not the lower capital-gains rate.
- Banks send a 1099-INT at $10 of interest, but you owe tax even under $10 and even if you never withdraw the interest.
- In high-tax states, Treasury interest skips state tax, one reason Treasuries can beat a bank account after tax.
When savings accounts paid almost nothing, the tax on the interest was a rounding error nobody thought about. Then yields climbed, balances started throwing off real money, and a lot of savers opened their mail in January to find a form they had never seen before: a 1099-INT. Rates on this page were last verified recently.
The interest is welcome. The tax treatment is just less generous than people expect, and there is a quiet twist that favors Treasuries in high-tax states.

How savings interest is taxed
Interest from a savings account is ordinary income. That means it is taxed at your marginal tax rate, the same rate as your wages, not the lower long-term capital-gains rate that applies to investments held over a year.
So if your top federal bracket is 22%, roughly 22 cents of each interest dollar goes to federal tax, plus any state income tax. There is no special break for savings interest; the IRS treats it like money you earned at work.
The 1099-INT threshold, and the trap
Your bank sends a Form 1099-INT when you earn $10 or more in interest for the year. But that $10 is only a reporting threshold, not a tax-free allowance:
- Earn $10 or more and you get a form, and the IRS gets a copy.
- Earn under $10 and you get no form, but you technically still owe the tax and are supposed to report it.
When rates were near zero, few people crossed $10, so this was invisible. Now, a meaningful balance clears $10 easily, which is why so many savers met the 1099-INT for the first time.
It is taxed even if you do not touch it
A common surprise: interest is taxed in the year it is credited, whether or not you withdraw it. Leave the interest in the account to keep compounding, and it is still taxable income that year. That is different from an unrealized gain on a stock, which is not taxed until you sell. It is the same principle behind phantom income on a CD.
The state-tax twist: Treasuries
Here is the lever high-earners in high-tax states use. US Treasury interest is exempt from state and local income tax, while bank savings interest is not. Two accounts paying the same headline yield are not equal after tax if you live somewhere with a meaningful state income tax.
That is a core reason some savers park cash in Treasury bills or a Treasury ETF instead of a bank account, the after-tax yield can come out ahead even at a similar or slightly lower rate.
Quick answers
Is savings interest taxable? Yes, as ordinary income at your marginal rate, plus state tax.
When do I get a 1099-INT? At $10 of interest. Under $10 you get no form but still owe.
Taxed if I do not withdraw? Yes, in the year it is credited, even if it stays in the account.
Methodology
Tax treatment reflects federal rules that tax bank interest as ordinary income and the $10 Form 1099-INT reporting threshold, plus the federal exemption of US Treasury interest from state and local income tax. Your exact rate depends on your bracket and state. This is general educational information, not personalized tax advice.
Frequently Asked Questions
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When does a bank send a 1099-INT?
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Is savings interest taxed if I do not withdraw it?
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