The IRS will eventually notice and send you a bill

If you trade on Robinhood and don't report those trades on your tax return, the IRS will catch the discrepancy. Robinhood sends the IRS a copy of every trade you make through Form 1099-B (for stocks and options) or Form 1099-INT (for dividends and interest). The IRS matches these forms against your tax return. If you filed a return without reporting the income, or didn't file at all, the IRS will send you a Notice of Deficiency — a bill for unpaid taxes plus penalties and interest.

The timing varies. The IRS may catch it within a year or two, or it may take longer if your account is small. But the forms are permanent records. The IRS has up to three years to assess tax on unreported income under normal circumstances, though that window extends to six years if you underreported income by 25 percent or more.

The bill includes three separate costs: the original tax owed, a accuracy-related penalty of 20 percent of the unpaid tax, and interest that compounds daily from the original due date. If the IRS determines you deliberately hid income rather than straightforward forgetting, the penalty can rise to 75 percent. Interest rates change quarterly but typically run around 8 percent per year.

Key Takeaways

  • Robinhood reports all your trades to the IRS on Form 1099-B, so unreported trading income will eventually trigger an IRS bill.
  • The bill includes the original tax owed, a 20 percent penalty for accuracy-related errors, and daily-compounding interest from the original due date.
  • The IRS has three to six years to send you a bill, depending on how much income you underreported.
  • If you discover you missed reporting Robinhood trades, filing an amended return before the IRS contacts you can reduce or eliminate the penalty.
  • Not filing a return at all carries additional consequences: the IRS can file a return for you (called a Substitute for Return) that claims no deductions and maximizes your tax bill.

How the IRS matches Robinhood forms to your return

Every brokerage, including Robinhood, is required by law to report trading activity to the IRS. For stock and options trades, this happens on Form 1099-B. For dividends and interest, it's Form 1099-INT. Robinhood files these forms with the IRS and sends you a copy by January 31 of the year following the trade.

The IRS runs an automated matching program that compares the income reported on these forms against the income you reported on your tax return. If you reported $5,000 in capital gains but Robinhood reported $12,000 in proceeds, the system flags the difference. You don't have to do anything for the IRS to notice — the computer catches it.

The matching process is imperfect. The IRS system sometimes struggles with cost basis (the amount you originally paid for a stock), which affects whether a gain is large or small. But the IRS errs on the side of assuming you owe more, not less. If there's a discrepancy, you'll hear about it.

What happens if you never filed a return at all

If you had taxable Robinhood income but never filed a return, the consequences are more severe. The IRS will eventually notice the missing return when it receives the 1099-B from Robinhood. At that point, the IRS can file a return on your behalf, called a Substitute for Return or SFR.

A Substitute for Return is designed to collect money, not to help you. The IRS will report all the income from your 1099-B but will claim zero deductions, zero credits, and zero exemptions — even if you were may have access to to them. This produces the highest possible tax bill. You then receive a bill for that amount plus penalties and interest.

The IRS will not file a Substitute for Return if you had no tax liability (for example, if your income was below the filing threshold for your age and filing status). But if you had significant trading gains, you will owe.

Penalties and interest compound quickly

The accuracy-related penalty is 20 percent of the unpaid tax. This applies if you underreported income by mistake or negligence. If the IRS determines the underreporting was intentional — for example, if you deliberately hid trades — the penalty becomes a fraud penalty of 75 percent instead.

Interest accrues daily from the original tax due date (usually April 15 of the year after you earned the income). The rate is set quarterly by the IRS and changes with the federal funds rate. As of 2024, the rate is 8 percent per year, compounded daily. On a $10,000 unpaid tax bill, interest alone adds roughly $800 per year.

Example: You earned $15,000 in capital gains on Robinhood in 2023 but didn't report it. Your tax on that income would be roughly $2,250 (at a 15 percent long-term capital gains rate). The IRS sends you a bill in 2025 for $2,250 in tax, plus $450 in accuracy-related penalty (20 percent), plus roughly $180 in interest for the year and a half the bill sat unpaid. Your total bill is now $2,880, and interest keeps growing.

How to fix it before the IRS contacts you

If you realize you missed reporting Robinhood trades, you can file an amended return using Form 1040-X. File it as soon as you notice the error. The key advantage: if you amend before the IRS sends you a notice, the accuracy-related penalty is usually waived. You'll still owe the tax and interest, but not the 20 percent penalty.

To amend, gather your 1099-B from Robinhood, recalculate your capital gains or losses, and file Form 1040-X with the corrected numbers. You can file by mail or through most tax software. The IRS typically processes amended returns within 16 weeks, though refunds take longer.

If you amend after the IRS has already sent you a notice, the penalty is not automatically waived, but you can request penalty relief by filing Form 843 (Claim for Refund and Request for Abatement). You'll need to explain the error — for example, that you misunderstood which trades were taxable, or that you thought Robinhood would handle the reporting for you.

State taxes and Robinhood income

Most states that have an income tax also require you to report Robinhood trades. Some states receive copies of your federal 1099-B forms; others don't. But if you live in a state with income tax and you underreport trading income on your state return, you face the same risk: the state will eventually notice and send you a bill.

State penalties and interest rates vary. Some states charge penalties as high as 25 percent, and interest rates range from 4 to 10 percent per year depending on the state. A few states (like Florida, Texas, and Nevada) have no income tax, so you don't owe state tax on Robinhood trades there.

If you moved during the year you traded, you may owe tax to multiple states. This is rare but possible if you moved mid-year and both states claim you as a resident. File amended returns in any state where you underreported income.

How to avoid this problem going forward

The simplest approach is to report Robinhood trades every year, even if the gains are small. Most tax software will import your 1099-B directly from Robinhood or let you enter the numbers manually. If you use a tax preparer, give them your 1099-B when you meet.

Keep records of your trades throughout the year, not just at tax time. Robinhood provides a downloadable history of all your trades, dividends, and interest. read this in December and save it. If the IRS ever questions your return, you'll have documentation to back up your numbers.

If you have losses, report them too. Capital losses can offset capital gains and reduce your tax bill. If your losses exceed your gains, you can deduct up to $3,000 of net losses against ordinary income in a single year, and carry the rest forward to future years. Many people skip reporting losses because they assume losses don't matter — but they do, and reporting them correctly can save you money.

Frequently Asked Questions

How long before the IRS sends me a bill for unreported Robinhood trades?

There's no fixed timeline. The IRS may contact you within one or two years, or it may take longer. The IRS has three years under normal circumstances, or six years if you underreported income by 25 percent or more. Don't assume you're safe just because you haven't heard anything yet.

Can I go to jail for not reporting Robinhood trades?

Criminal prosecution for tax evasion is rare and typically reserved for cases involving large amounts of money, deliberate concealment, or a pattern of behavior over many years. Most people who miss reporting trading income face civil penalties (the bill) rather than criminal charges. However, if the IRS determines you intentionally hid income, the fraud penalty of 75 percent applies, and criminal referral becomes possible.

What if Robinhood made a mistake on my 1099-B?

Contact Robinhood and ask them to issue a corrected form. If they agree the form is wrong, they'll send you a corrected 1099-B and file a corrected version with the IRS. Once you receive the corrected form, you can file an amended return with the correct numbers. Keep the corrected 1099-B in your records.

Do I have to report trades if I only made a small profit?

Yes. There's no minimum threshold for reporting capital gains. Even a $50 gain must be reported. The IRS will match your 1099-B against your return regardless of the amount, so underreporting small gains carries the same risk as underreporting large ones.

What if I lost money on Robinhood trades?

Report the losses. Capital losses reduce your tax bill by offsetting gains or reducing ordinary income. You can deduct up to $3,000 of net losses per year against wages, interest, and other income. Any losses beyond that carry forward to future years. Reporting losses correctly can save you thousands over time.