A combined tax statement for 1099 forms is the single year-end booklet your brokerage sends that bundles several IRS information returns into one document, typically a 1099-INT for interest, a 1099-DIV for dividends, and a 1099-B for securities you sold, with a 1099-OID, 1099-MISC, or 1099-NEC section added when your account generated that kind of income. Each labeled section mirrors the boxes on the official IRS form of the same number, and each set of boxes maps to a specific line, schedule, or worksheet on your return. Your job is to move the numbers to the right places.
What’s Inside the Booklet
Open the statement and you’ll see headings tagged with IRS form numbers. The three you can count on for a typical taxable brokerage account are the 1099-INT, 1099-DIV, and 1099-B sections.1Internal Revenue Service. About Form 1099-B, Proceeds from Broker and Barter Exchange Transactions You may also see a 1099-OID section if you held bonds bought at a discount, a 1099-MISC section if the account produced substitute payments in lieu of dividends, or a 1099-NEC section for certain nonemployee compensation.2Internal Revenue Service. About Form 1099-MISC, Miscellaneous Information
The numbered boxes inside each section match the same boxes your broker files electronically with the IRS. That means the totals should line up exactly with what the IRS already has on file. If they don’t, the agency’s matching program will flag the difference, so accuracy here matters more than almost anywhere else on the return.
When Your Statement Arrives and When to File
Brokerages are not required to mail consolidated statements until mid-February, and complex ones often don’t arrive until early March. Accounts holding mutual funds, REITs, or partnerships depend on income reclassifications that trickle in from those entities after year-end, and brokerages routinely issue corrected statements in cycles from late February through early April as fund companies finalize their allocations.
If you file and then get a corrected statement that changes your tax liability, you’ll generally need to file Form 1040-X.3Internal Revenue Service. Topic No. 154, Form W-2 and Form 1099-R (What to Do if Incorrect or Not Received) The cleaner move is to wait until your broker confirms the statement is final. Most brokerages note on the statement or their website whether more correction cycles are expected.
Interest Income: The 1099-INT and 1099-OID Sections
Start with Box 1 of the 1099-INT section, which shows your total taxable interest. If your combined taxable interest from all sources tops $1,500, you’ll list each payer and amount on Schedule B before carrying the total to Form 1040.4Internal Revenue Service. About Schedule B (Form 1040), Interest and Ordinary Dividends Below that threshold, the interest still goes on your 1040; you just skip the Schedule B detail.
Original Issue Discount
If your booklet contains a 1099-OID section, Box 1 there is the annual portion of discount on bonds you bought below face value, and it counts as interest. Report it on Schedule B, line 1, alongside your other interest, listing the payer and amount.5Internal Revenue Service. Instructions for Schedule B (Form 1040)
Tax-Exempt Interest and Private Activity Bonds
Box 8 of the 1099-INT section shows tax-exempt interest, usually from municipal bonds. It isn’t taxed federally, but you still report it on Form 1040 Line 2a, because the IRS uses it to figure how much of your Social Security may become taxable.6Internal Revenue Service. Internal Revenue Service Form 1099-INT Box 9 shows interest from specified private activity bonds, which is generally exempt for regular tax but can trigger the Alternative Minimum Tax. A meaningful amount in Box 9 may push you into completing Form 6251.
Dividend Income: The 1099-DIV Section
Dividends fall into categories that get very different tax treatment, and the section separates them for you.
Ordinary Versus Qualified
Box 1a is total ordinary dividends. The full amount goes on Form 1040, and onto Schedule B if it exceeds $1,500.7Internal Revenue Service. Instructions for Recipient – Form 1099-DIV Box 1b is the portion of that Box 1a total that qualifies for the long-term capital gains rates of 0%, 15%, or 20%. Box 1b is a subset of Box 1a, not an additional amount. The qualified figure feeds the Qualified Dividends and Capital Gain Tax Worksheet in the Form 1040 instructions, which computes tax at the preferential rate.
Section 199A REIT Dividends
Box 5 shows Section 199A dividends, typically from REITs. Up to 20% of that amount is deductible as qualified business income, and you don’t have to itemize to claim it.8Internal Revenue Service. Qualified Business Income Deduction The deduction runs through the QBI worksheets and lands on Form 1040. If you hold REIT funds in a taxable account, skipping this box means giving up a straightforward deduction.
Substitute Payments in Lieu of Dividends
If shares in your margin account get lent out, you may receive substitute payments instead of the actual dividend. Those show up in Box 8 of the 1099-MISC section of the statement, not in the 1099-DIV section.9Internal Revenue Service. Instructions for Forms 1099-MISC and 1099-NEC They don’t qualify for the lower dividend rates. They’re taxed as ordinary income at your full marginal rate, even when the underlying stock would have paid a qualified dividend.
Foreign Tax Withheld
Box 7 shows foreign taxes withheld on international dividends.7Internal Revenue Service. Instructions for Recipient – Form 1099-DIV You can deduct it on Schedule A or claim it as a credit; the credit is almost always better because it cuts your tax bill dollar-for-dollar. If the total foreign tax you’re claiming as a credit is $300 or less ($600 or less if married filing jointly), you can claim it directly on Form 1040 with no extra forms. Above those thresholds you’ll generally need Form 1116.10Internal Revenue Service. Instructions for Form 1116
Capital Gains and Losses: The 1099-B Section
This is the longest part of most statements and the place where errors are most likely. Every security you sold during the year appears here, and the data feeds Form 8949 and Schedule D.
The Shortcut That Skips Form 8949
Before entering individual trades, check whether you qualify for the aggregation exception. If your transactions involve covered securities where basis was reported to the IRS, and none need adjustments (no wash sales, no basis corrections), you can skip Form 8949 and enter the summarized totals directly on Schedule D, line 1a for short-term or 8a for long-term.11Internal Revenue Service. Form 8949 – Sales and Other Dispositions of Capital Assets Your statement usually gives you those aggregated totals in a summary block. For a straightforward portfolio, this cuts the work significantly.
When You Actually Need Form 8949
If any trades need adjustments, involve non-covered securities, or carry wash sale disallowances, Form 8949 comes back into play. Part I is short-term (held one year or less), Part II is long-term.12Internal Revenue Service. Instructions for Form 8949 Sales and Other Dispositions of Capital Assets Within each part, you check a box to categorize the group:
- Box A (short-term) or Box D (long-term): basis was reported to the IRS. Easiest case, since your figures and the IRS’s should match.
- Box B or E: basis was not reported to the IRS. You supply the cost basis from your own records.
- Box C or F: transactions not reported on any 1099-B, such as a private sale.
For each group, you enter total proceeds, total cost basis, and any adjustments. The net results flow to Schedule D, which combines short-term and long-term into one net gain or loss for the year.
Covered Versus Non-Covered Securities
The statement flags every transaction as covered or non-covered. For covered securities, the broker was required to report your cost basis to the IRS, so proceeds and basis on the statement should already match agency records.13Internal Revenue Service. Instructions for Form 1099-B For non-covered securities, the broker reports only the sale proceeds. If you don’t supply the correct basis on Form 8949, the IRS treats the entire sale price as gain. Dig up original purchase confirmations, reinvested dividend records, and any corporate action history (splits, mergers, spin-offs) to reconstruct basis. This is one of the more expensive mistakes on an investment return.
Wash Sales
The most common adjustment on the 1099-B is a wash sale disallowance. Sell a security at a loss, buy a substantially identical one within 30 days before or after, and the loss can’t be deducted now.14Office of the Law Revision Counsel. 26 USC 1091 – Loss From Wash Sales of Stock or Securities Your statement identifies the disallowed amount in the 1099-B detail. On Form 8949, you use adjustment code “W” and add the disallowed amount to the basis of the replacement shares.15Internal Revenue Service. Income – Capital Gain or Loss Workout The loss isn’t lost; it comes back when you sell the replacement without triggering another wash sale.
One trap the broker can’t catch: wash sales across separate accounts. Sell a stock at a loss in a taxable account and buy it inside your IRA within 30 days, and the loss is still disallowed, but your consolidated statement won’t flag it because the broker only sees one account. Tracking cross-account wash sales is on you.
The Capital Loss Deduction Limit
If total capital losses exceed total capital gains, you can deduct up to $3,000 of the net loss against other income ($1,500 if married filing separately).16Internal Revenue Service. Topic No. 409, Capital Gains and Losses Any excess carries forward indefinitely, keeping its short-term or long-term character, and shows up on next year’s Schedule D.
The 3.8% Net Investment Income Tax
Everything you just reported off the statement (interest, dividends, capital gains) may face an additional 3.8% Net Investment Income Tax if your modified adjusted gross income crosses certain thresholds:17Internal Revenue Service. Topic No. 559, Net Investment Income Tax
- Single or head of household: $200,000
- Married filing jointly: $250,000
- Married filing separately: $125,000
These thresholds are not indexed for inflation, so more filers cross them each year. The 3.8% applies to the lesser of your net investment income or the amount by which modified AGI exceeds the threshold, and you compute it on Form 8960.18Internal Revenue Service. 2025 Instructions for Form 8960 If you’re anywhere near these income levels, don’t treat the numbers on the consolidated statement as the whole story.
A Note on Investment Expenses
The statement may list advisory fees, custodial charges, or similar account expenses. Under current law these miscellaneous investment expenses are non-deductible for individuals. The 2017 tax law suspended the deduction, and later legislation made that permanent. If your statement shows fees, they don’t go anywhere on Schedule A or your return.