The IRS taxes interest based on who owns the account, not whose name appears on it

When you earn interest on a joint savings account, the IRS requires that interest to be reported and taxed. The tax responsibility depends on how the account is legally owned — which may or may not match whose names are on the paperwork. If you and another person own the account as joint tenants with rights of survivorship (the most common setup), you each report your proportional share of the interest on your own tax return. If one person owns the account and the other is merely authorized to withdraw, only the owner reports the interest.

The bank will send a Form 1099-INT to whoever is listed as the account owner on the bank's records. That person receives the form in January of the following year and must report all interest earned. If the account is truly jointly owned but only one name appears on the 1099-INT, the person who received the form is responsible for splitting the interest with the co-owner and reporting only their share — but this requires documentation and agreement between both parties.

Interest on savings accounts is taxed as ordinary income at your regular tax rate, not at a lower capital gains rate. The amount owed depends on your total income for the year and your tax bracket. Even accounts earning very small amounts of interest must be reported if the interest exceeds $10 in a calendar year.

Key Takeaways

  • The person whose name appears on the Form 1099-INT from the bank is responsible for reporting the interest, even if the account is jointly owned.
  • If a joint account is truly owned 50/50 but only one person receives the 1099-INT, you must split the interest between you and each report your share on your own return.
  • Interest on savings accounts is taxed as ordinary income at your regular tax rate, regardless of how small the amount.
  • You must report interest of $10 or more per calendar year, and the bank will report it to the IRS on Form 1099-INT.

How the bank decides who gets the 1099-INT

The bank issues the 1099-INT to whichever person is listed first on the account or designated as the primary account holder in the bank's system. This is a practical choice made by the financial institution, not a legal information of ownership. If you opened the account and your spouse's name was added later, you will likely receive the form even if you own the account equally.

You can contact your bank and ask them to clarify how they have coded the account ownership in their records. Some banks allow you to designate a different person to receive the 1099-INT, though not all do. If you want to change who receives the form, call the bank's customer service line and ask whether they can update their records — this is different from changing the account title or ownership structure.

If the bank will not change who receives the form, the person who gets it still has the responsibility to report only their actual share of the interest. This requires keeping your own records of how much interest was earned and what percentage belongs to each owner.

Reporting your share of interest when you are not the primary account holder

If your co-owner received the 1099-INT but you own the account equally, you do not file a separate form with the IRS. Instead, you and your co-owner must agree on how to split the interest, and each of you reports your share on your own tax return using Schedule B (Interest and Ordinary Dividends). The person who received the 1099-INT will report the full amount, so you are not duplicating — you are each reporting your portion of the total.

The split does not have to be exactly 50/50. If you contributed 60 percent of the money and your co-owner contributed 40 percent, you can split the interest proportionally. Keep a record of this agreement in writing, even if it is just an email between you and your co-owner, in case the IRS ever asks how you divided the interest.

If you and your co-owner cannot agree on how to split the interest, or if one person refuses to report their share, you have a problem that goes beyond taxes — it becomes a dispute about account ownership. In that case, you may need to consult a tax professional or attorney about how to document your ownership stake.

What happens if interest is not reported

The IRS receives a copy of every 1099-INT that a bank sends out. If the interest reported on the form does not match what appears on your tax return, the IRS will notice. If you received a 1099-INT for $150 in interest but reported only $75 on your return, the IRS will send you a notice asking you to explain the difference or pay tax on the missing amount plus interest and penalties.

If you did not report the interest at all, the IRS will assume you owe tax on the full amount shown on the 1099-INT. You can respond to an IRS notice by explaining that you split the interest with a co-owner and providing documentation of that arrangement. The IRS will then adjust your liability based on your actual share.

Penalties for underreporting interest are usually 20 percent of the underpaid tax, plus interest calculated from the original due date. If the underreporting was unintentional and you correct it promptly after receiving an IRS notice, penalties are sometimes reduced or waived, but this is not may provide.

Different ownership structures and their tax treatment

The way you title a joint account affects how interest is taxed. If the account is titled "John Smith and Jane Smith, Joint Tenants with Rights of Survivorship," you are both considered owners and should split the interest. If it is titled "John Smith, in trust for Jane Smith," only John is the owner and only John reports the interest — Jane has no tax obligation even though she may inherit the money. If it is titled "John Smith or Jane Smith," the person whose name appears on the 1099-INT reports all the interest.

Some couples use a tenancy in common structure, where each person owns a specific percentage of the account. In this case, the interest should be split according to those percentages. This structure is less common for savings accounts but more common for real estate or investment accounts.

If you are unsure how your account is titled, check your account agreement or call the bank and ask them to read the exact title from their records. The title determines both who owns the account legally and how the interest should be reported for taxes.

Reporting interest when you are married and file jointly

If you are married and file a joint tax return, the distinction between whose name is on the 1099-INT matters less because you are reporting all household income together anyway. You will combine all interest from all accounts — yours, your spouse's, and any joint accounts — and report the total on one Schedule B. The IRS does not care which spouse received which 1099-INT when you file jointly.

However, if you file separately from your spouse, the person who received the 1099-INT must report that interest on their individual return. Your spouse cannot report interest that was issued in your name, even if you owned the account together. Filing separately is rare and usually disadvantageous for other tax reasons, but it does affect how joint account interest is reported.

If you are married but file separately and want to split interest from a joint account, you will need to file an amended return or work with a tax professional to document the split correctly. This is more complicated than filing jointly, so most married couples find it simpler to file together.

Interest from joint accounts held by minors or dependents

If a joint account is held by a parent and a minor child, the interest is taxed based on who owns the account. If the parent opened the account and the child's name was added for convenience (so the child can withdraw money), the parent is the owner and reports all the interest. If the parent and child are true joint owners, the interest should be split between them.

A minor child must report interest on their own tax return if the interest exceeds $1,250 in a calendar year (this threshold changes yearly). If the interest is below that amount, it may be reported on the parent's return instead under the "kiddie tax" rules. A tax professional can help you determine the best way to report interest from an account held by a parent and child.

If you are a parent managing money for a minor child, keep records of how much interest the account earned each year and whether it was reported on your return or the child's return. This documentation will be useful if the IRS ever questions the reporting.

Frequently Asked Questions

Do I have to report interest if the account earned less than $10?

No. Banks are not required to issue a 1099-INT for interest under $10 in a calendar year, and you do not have to report it on your tax return. However, if the bank does issue a form, you must report the amount shown, even if it is under $10.

What if my co-owner and I disagree about how to split the interest?

You should try to resolve this between yourselves first, ideally in writing. If you cannot agree, you may need to consult a tax professional or attorney. In the meantime, each of you should report what you believe is your fair share on your own return and keep documentation of your position.

Can I change the account title to avoid reporting interest?

No. Changing the title does not change the interest that was already earned in previous years. You must report interest based on the account structure that existed when the interest was earned, not based on changes you make later.

Will the IRS know if my co-owner does not report their share of the interest?

The IRS will see the 1099-INT issued to one person, but they will not automatically know that the interest was split. If both of you report your shares correctly, there is no problem. If one person reports the full amount and the other reports nothing, the IRS may not catch it unless they audit one of you.

What if the bank issued the 1099-INT to the wrong person?

Contact the bank and ask them to issue a corrected form (Form 1099-INT with a "CORRECTED" label). The bank will send the corrected form to both you and the IRS. If the bank will not correct it, you can still report your actual share on your return and explain the discrepancy if the IRS contacts you.