Updated October 17, 2026. Quick answer: Line 3a takes your total qualified dividends and line 3b takes your total ordinary dividends. The instructions say qualified dividends “are also included in the ordinary dividend total required to be shown on line 3b”, and that the amounts are generally in box 1b and box 1a of Form 1099-DIV.
Schedule A and Schedule B (Form 1040) for 2025, read line by line: Schedule A lines 9 and 10 and Schedule B lines 5 and 6.
What goes on line 3a
The form captions line 3a “Qualified dividends”. The instruction begins: “Enter your total qualified dividends on line 3a.” It continues: “Qualified dividends are also included in the ordinary dividend total required to be shown on line 3b.” So a qualified dividend is counted twice on the form, once on each line, and the 3a figure is a subset of the 3b figure.
The instruction explains why the split exists: “Qualified dividends are eligible for a lower tax rate than other ordinary income.” It also says where to look: “Generally, these dividends are shown in box 1b of Form(s) 1099-DIV.” The boxes are explained on the 1099-DIV boxes 1a and 1b page.
When a dividend in box 1b is not qualified
Box 1b is a starting point, not a guarantee. The instructions warn: “Some dividends may be reported as qualified dividends in box 1b of Form 1099-DIV but aren’t qualified dividends.” The exceptions begin with “Dividends you received as a nominee.” The best known of them is the stock holding period rule, which the instructions give in full:
“Dividends you received on any share of stock that you held for less than 61 days during the 121-day period that began 60 days before the ex-dividend date.” The definition of the date is part of the rule: “The ex-dividend date is the first date following the declaration of a dividend on which the purchaser of a stock isn’t entitled to receive the next dividend payment.”
The counting method is also stated: “When counting the number of days you held the stock, include the day you disposed of the stock but not the day you acquired it.” A further limit applies to how days are counted: “Also, when counting the number of days you held the stock, you can’t count certain days during which your risk of loss was diminished.” The IRS sends you to Pub. 550 for the details.
There is a separate holding rule for one kind of share: “Dividends attributable to periods totaling more than 366 days that you received on any share of preferred stock held for less than 91 days” during a 181-day window that the instructions describe as the “day period that began 90 days before the ex-dividend date.” The instructions also exclude “Payments in lieu of dividends, but only if you know or have reason to know that the payments aren’t qualified dividends.”
What goes on line 3b and when Schedule B is needed
The form captions line 3b “Ordinary dividends”. The instructions read: “Each payer should send you a Form 1099-DIV.” “Enter your total” ordinary dividends “on line 3b.” “This amount should be shown in box 1a of Form(s) 1099-DIV.”
The attachment rule is “You must fill in and attach Schedule B if the total is over $1,500 or you received, as a nominee, ordinary dividends that actually belong to someone else.” See the Schedule B page for the schedule.
Line 3c, return of capital and insurance dividends
Line 3c has two boxes on the form: “Check if your child’s dividends are included in”. The instructions tie the boxes to each line: “If you are including your child’s qualified dividends in the total on line 3a, check box 1 on line 3c.” and “If you are including your child’s ordinary dividends in the total on line 3b, check box 2 on line 3c.”
Not every payout is a dividend for these lines. The instructions say “Some distributions are a return of your cost (or other basis). They won’t be taxed until you recover your cost (or other basis).” After you get back all of your cost (or other basis), the instructions say you must report these distributions as capital gains on Form 8949. The instructions also say “Dividends on insurance policies are a partial return of the premiums you paid. Don’t report them as dividends. Include them in income on Schedule 1, line 8z, only if they exceed the total of all net premiums you paid for the contract.”
Where the number comes from
Both numbers are totals of what your payers report on Form 1099-DIV: box 1a for line 3b and box 1b for line 3a. Add the forms from every brokerage and fund company, then check the nominee and holding-period exceptions above before you accept the box 1b figure. A side-by-side look at the common 1099 boxes is on the 1099-DIV, 1099-INT and 1099-B boxes guide. Capital gain distributions are a different box, covered on the box 2a page.
Where it goes next
Line 3b is the dividend figure that enters your total income; line 3a does not. The form’s own total-income line reads “Add lines 1z, 2b, 3b, 4b, 5b, 6b, 7a, and 8. This is your total income”. The later lines are explained on the lines 9, 10 and 11 page.
Line 3a is used when the tax is figured. The instructions say “Use the Qualified Dividends and Capital Gain Tax Worksheet or the Schedule D Tax Worksheet, whichever applies, to figure your tax.” The interest lines that sit just above are on the lines 2a and 2b page, and the IRA line is on the lines 4a and 4b page. The whole form is mapped on Form 1040 line by line.
Edition and line numbers
This page reads the 2025 Form 1040 and its 2025 instructions, which are the files irs.gov was serving as the current ones on 2026-10-17. The instructions say “The lines on Forms 1040 and 1040-SR are the same.” Check the tax year printed on the form you are filling in, and use the line numbers on that year’s form. If your form is from a different year, its line numbers and wording may not match what is described here.
Common mistakes
- Entering the box 1b amount on line 3a without checking the exceptions. The instructions say some dividends “aren’t qualified dividends” even when reported in box 1b, including those from stock “held for less than 61 days during the 121-day period”.
- Leaving the qualified amount out of line 3b. The instructions say qualified dividends “are also included in the ordinary dividend total required to be shown on line 3b”.
- Reporting insurance policy dividends here. The instructions say “Don’t report them as dividends.”
Related: 1099-DIV boxes 1a and 1b, Schedule B, 1099-DIV box 2a, qualified dividends and capital gain tax worksheet, and capital gains tax calculator.
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Answer againSources
- Instructions for Form 1040 and Form 1040-SR (2025): https://www.irs.gov/pub/irs-pdf/i1040gi.pdf
- Form 1040, U.S. Individual Income Tax Return (2025): https://www.irs.gov/pub/irs-pdf/f1040.pdf
Read from the IRS documents linked above on October 17, 2026. General information, not tax advice. Your own facts decide the outcome, and a preparer, the account provider or the IRS is the right place to confirm anything consequential.