Investment Tax Forms Explained: 1099-B, 1099-DIV, 1099-INT and 8949
Every winter, brokerages send tax forms that summarize a year of investing, and the alphabet soup can be confusing. This guide explains what the main forms report, how they connect to Form 8949 and Schedule D, what to check before you file, and why corrected forms sometimes arrive late.
If you hold investments in a taxable brokerage account, the IRS learns about much of what happened in that account from forms your broker files. You receive copies, and you use them to prepare your return. Understanding what each form is telling you makes filing faster and helps you spot errors before they cost you money or prompt a notice.
This is general education, not tax advice. Rules, forms and thresholds change, and your situation may differ, so check the IRS instructions for the relevant tax year or consult a qualified tax professional.
When the forms arrive
Brokers and funds typically send investment tax documents early in the year, often in January and February. Many brokerages combine them into a single consolidated 1099 that includes several form types. Because some information, such as the final classification of fund distributions, is not available until after year-end, consolidated forms can arrive later than single-purpose ones and can be revised afterward.
Accounts inside a traditional or Roth IRA or a 401(k) generally do not produce the forms below for ordinary trading, because gains inside those accounts are not taxed each year. That is one reason tax planning differs between account types. Our guide to asset location explains why.
The main forms at a glance
| Form | What it reports | Where it usually goes on your return |
|---|---|---|
| 1099-B | Proceeds from sales of stocks, bonds, ETFs, mutual funds and other securities | Form 8949, then Schedule D |
| 1099-DIV | Dividends and fund distributions, including capital gain distributions | Schedule B if required, and the return itself; capital gain distributions can go to Schedule D |
| 1099-INT | Interest from bank accounts, bonds and other sources | Schedule B if required, and the return itself |
| 1099-OID | Original issue discount on certain bonds and similar instruments | Interest income reporting |
| 1099-R | Distributions from retirement accounts and pensions | Retirement distribution lines on your return |
| 1099-DA | Sales or exchanges of digital assets reported by brokers | Form 8949 and Schedule D |
| Schedule K-1 | Your share of income from partnerships, certain funds and some trusts | Reported according to the K-1 instructions |
Not every investor gets every form. A person who holds a single index fund may only see a 1099-DIV, while an active trader may receive many pages of 1099-B detail.
Form 1099-B: sales and gains
The 1099-B lists each sale in your account during the year. For every transaction it generally shows:
- Description and date acquired and sold.
- Proceeds: the amount you received.
- Cost basis: what you paid, adjusted for certain events, if your broker reports it.
- Gain or loss and whether it is short term or long term.
- Adjustments, such as disallowed losses from the wash sale rule.
The basis is the number to look at most closely. Your gain is the proceeds minus the adjusted basis, so a missing or wrong basis changes your tax directly. If you want a refresher on how basis works, see our explainer on cost basis for investors.
The form separates transactions by whether basis was reported to the IRS:
- Covered securities, where the broker reports basis, which is generally the case for more recently acquired shares.
- Noncovered securities, where the broker may not have complete basis information, often for older holdings or transferred positions. You need to confirm the basis from your own records.
Form 8949 and Schedule D
Form 8949 is where you list sales of capital assets, and Schedule D totals them and carries the result to your return. Most tax software fills these in for you from your 1099-B data. Still, it helps to understand the structure.
Form 8949 sorts transactions into categories based on two things: whether the gain or loss is short term or long term, and whether basis was reported to the IRS and whether any adjustments are needed. The 1099-B tells you which box applies to each sale. If you need to correct a basis, report an adjustment code, or add a wash sale amount, Form 8949 is where that happens.
The IRS publishes instructions for each tax year, and some brokers' forms summarize transactions so that you may be able to attach a statement instead of listing every line. Check the current instructions to see what is allowed.
For how short-term and long-term gains are taxed and why holding periods matter, see our guide to capital gains tax on investments.
Form 1099-DIV: dividends and distributions
The 1099-DIV reports dividends and certain distributions. The boxes you will see most often show:
- Total ordinary dividends.
- Qualified dividends, the portion that may be taxed at long-term capital gain rates if holding period and other requirements are met. This is a subset of the ordinary total, not an addition to it.
- Total capital gain distributions, which come from funds that sold holdings at a profit and passed the gains on to shareholders. These are reportable even if you reinvested them.
- Foreign tax paid, which may allow a credit or deduction in some cases.
- Exempt-interest dividends from municipal bond funds, which are generally not subject to federal income tax but may still need to be reported and may be affected by state rules.
A common surprise is receiving a 1099-DIV with a capital gain distribution from a fund you never sold. Funds distribute gains to shareholders, and in a taxable account those distributions can create tax even when your own holdings did not change.
Form 1099-INT and other interest forms
Interest from savings accounts, certificates of deposit and some bonds appears on the 1099-INT. Brokers generally issue it above a modest reporting threshold, but interest is taxable even if no form arrives. Interest from U.S. Treasury securities is generally taxable at the federal level but exempt from state income tax, and the form may show that portion separately. Check the box descriptions and the IRS instructions for details.
Checking your forms before you file
A few minutes of review can save you a headache.
- Compare to your own records. Check trade confirmations or year-end summaries, especially for sales you remember making.
- Review cost basis on every large gain. Look for sales labeled noncovered or with missing basis, which may be reported as zero basis and overstate your gain if you do nothing.
- Look at wash sale adjustments. If you sold at a loss and bought a substantially identical security within the restricted window, part of the loss may be deferred. Our guide to tax-loss harvesting and the wash sale rule explains how it works, including across accounts.
- Check accounts at different firms. Each broker reports only its own account, and the wash sale rule can apply across them in ways a single form may not show.
- Confirm personal details. Name, taxpayer identification number and account type should be correct.
- Watch for corrected forms. If a broker issues a corrected 1099, use it, and wait to file if you have been told one is coming.
If something looks wrong
Contact your broker first. They can explain a number, supply historical basis information or issue a correction. If you cannot get a correction, you may be able to report the right figure on your return with an explanation, and the IRS instructions describe how to do so. Keep documentation of what you changed and why.
Keep your records
Keep your trade confirmations, year-end statements and any basis calculations for as long as you might need them to support a return. The IRS describes recordkeeping guidance on its website, and records matter most for older holdings or inherited and gifted shares, where the broker's basis information may be incomplete.
A practical close
Tax season is easier when you treat your forms as a checklist. Gather every 1099 from every account, confirm that each sale and its basis looks reasonable, and understand how dividends and interest flow to your return. The IRS pages on each form list the current instructions, and a tax professional can help when your situation includes inherited assets, partnerships or complex trading.
Frequently asked questions
Do I have to report investments if I did not receive a 1099?
Generally yes. Taxable income and gains are reportable whether or not a form arrives, and a small amount of interest or a gain below a broker's reporting threshold is still part of your tax picture. The IRS also receives copies of most forms sent to you, so mismatches can trigger notices.
Why did my broker send a corrected 1099?
Brokers sometimes revise forms after late reclassifications by funds or companies, for example when part of a distribution is later recharacterized. Corrected versions are common enough that many investors wait for a consolidated statement to finalize before filing, or check for an updated one before they submit.
What is the difference between covered and noncovered securities?
Covered securities are those where your broker is required to track and report your cost basis to the IRS, which generally means more recently acquired shares. For noncovered securities the broker may not report basis, so you need your own records. The 1099-B shows which category each sale falls into.
