Form 1099-R and RMDs: How to Read Your Distribution Tax Form (2025 Tax Year)

Every required minimum distribution — whether from a traditional IRA, a 401(k), or an inherited account — generates a Form 1099-R. Most boxes are straightforward. A few are genuinely confusing, especially if you made a qualified charitable distribution (QCD), have after-tax basis in your IRA, or inherited the account. This guide walks through each box that matters to RMD recipients, explains the distribution codes you're likely to see, and covers the reporting rules that trip people up year after year.

What is a Form 1099-R?

Form 1099-R is the tax information return that custodians, plan administrators, and insurance companies use to report distributions from retirement accounts and pensions to both you and the IRS.¹ You receive one copy; the IRS receives another. The IRS then matches the gross distribution in Box 1 against the amount you report on your tax return.

If you took any distribution from a traditional IRA, 401(k), 403(b), pension, annuity, or inherited retirement account during the year, you will receive at least one 1099-R. If you took distributions from multiple accounts or multiple custodians, you will receive a separate 1099-R for each one.

The boxes that matter for RMD recipients

The form has 16 numbered boxes, plus the IRA/SEP/SIMPLE checkbox. Most boxes don't apply to a typical RMD scenario. These are the ones you need to understand:

Box 7 distribution codes for retirees

Box 7 contains a one- or two-character code that tells the IRS the nature of the distribution. Multiple codes can appear together (for example, "7B" for a normal distribution from a designated Roth account). Here are the codes most likely to appear on a retiree's 1099-R:²

Where to report your 1099-R on Form 1040

Where the distribution lands on your tax return depends on the IRA/SEP/SIMPLE checkbox on your 1099-R:³

The total gross distribution from each 1099-R goes in the "a" line. The taxable portion — which you or your tax software determines — goes in the "b" line. The IRS computers compare what Box 1 reports to what you claim on Line 4a or 5a. Significant discrepancies can trigger a correspondence audit.

The QCD reporting trap: why Box 1 and Line 4b don't match

This is the most common source of confusion on Form 1099-R for retirees who make qualified charitable distributions.

When you do a QCD — a direct transfer from your IRA custodian to a qualifying charity — the custodian reports the entire distribution amount in Box 1 as a gross distribution. The IRS does not automatically know that any portion was a QCD. Even if your custodian uses the optional Code Y in Box 7, they typically still leave Box 2a equal to Box 1 (fully taxable).

It is your responsibility to exclude the QCD amount from taxable income on your Form 1040.⁴ Here is the correct reporting sequence:

The 2026 QCD annual limit is $111,000 per person ($222,000 for a married couple where both spouses have their own IRAs). QCDs also count toward satisfying your RMD for the year, up to your RMD amount.⁵

What you cannot do: take the IRA distribution into your bank account and then write a check to the charity. That sequence produces a taxable distribution plus a separate charitable contribution — not a QCD. The transfer must go directly from the custodian to the qualified charity.

See: QCD Rules and Strategy Guide and QCD Calculator: Tax Savings and IRMAA Tier Impact

Non-deductible IRA basis: when Box 2a understates your tax-free portion

If you ever contributed to a traditional IRA and were not able to deduct the contribution (because your income was too high or you were covered by a workplace plan), those dollars created what the IRS calls "basis" — after-tax money that is not taxed again on distribution.

Most IRA custodians do not track your basis. They report the full distribution in Box 2a as taxable, and check the "Taxable amount not determined" checkbox in Box 2b. This is technically correct — they can't know what you contributed years ago to a different IRA at a different custodian.

The IRS tracks basis through Form 8606, which you should have filed in every year you made a non-deductible IRA contribution. If you have basis and failed to file Form 8606 for those years, you may be double-paying taxes on every RMD you take until you correct the records.

If Box 2b's "Taxable amount not determined" box is checked and you have non-deductible contributions in your history, the correct taxable amount on Line 4b will be lower than what Box 2a suggests. File or amend Form 8606 to establish the record.

See: Non-Deductible IRA RMDs: Avoid Double Tax with Form 8606

Inherited IRA distributions: Code 4

If you are taking distributions from an account you inherited — a traditional IRA, a 401(k), a 403(b) — the 1099-R will show Code 4 in Box 7 and the IRA/SEP/SIMPLE checkbox will be checked (for inherited IRAs) or unchecked (for inherited employer plans).²

Code 4 is simply the IRS notification that this is a death distribution. It carries no penalty regardless of your age — even if you're 30, inherited IRA distributions with Code 4 have no 10% early withdrawal penalty. The full distribution is still ordinary income (unless the decedent had non-deductible basis in the account, in which case Form 8606 applies).

The inherited IRA distribution rules are substantially more complex than the reporting. If the decedent died on or after their Required Beginning Date, Treasury's T.D. 10001 final regulations require annual minimum distributions during the 10-year period — not just a year-10 lump sum. Missing one triggers the same 25% excise tax as a missed RMD from your own account.

See: Inherited IRA 10-Year Rule: Distribution Calculator and Strategy and Eligible Designated Beneficiary (EDB): Who Still Gets a Stretch Distribution

Common 1099-R errors and what to do

Box 2a shows the full distribution when part was a QCD

This is not technically an error — it's how the form works. Exclude the QCD amount yourself on Line 4b with the "QCD" notation. Contact your custodian to confirm the distribution was processed as a direct transfer to the charity (not paid to you). If the transfer went to you rather than directly to the charity, it is not a QCD regardless of your intent.

Wrong distribution code in Box 7

The most consequential error: Code 1 (early distribution, penalty applies) when it should be Code 7 (normal distribution, no penalty). This sometimes happens when a custodian's system doesn't correctly update your birth date after you turn 59½. If you see Code 1 and you're over 59½, contact the custodian immediately for a corrected 1099-R. Filing with Code 1 will generate an IRS inquiry about the 10% penalty.

Gross distribution in Box 1 doesn't match what you actually received

Could reflect a withholding discrepancy — Box 1 is the full gross distribution, and Box 4 shows withholding. What you received in your bank account is Box 1 minus Box 4. If the numbers don't reconcile to your actual deposits, request a custodian statement showing the breakdown.

Missing 1099-R for an inherited account

If you inherited an IRA and took a distribution but did not receive a 1099-R, the account custodian may not have your correct address or may not have retitled the account in your name properly. Contact the custodian — the IRS will have received the form regardless, and not reporting the income creates a mismatch.

Received a 1099-R for a direct rollover you thought was nontaxable

Direct rollovers (Code G) appear on a 1099-R but are not taxable. Report Box 1 on Line 4a or 5a, then enter $0 on Line 4b or 5b. Verify that Box 2a shows $0 and that Code G is in Box 7. If Box 2a shows a taxable amount on a Code G distribution, that is an error requiring a corrected form.

Summary: what flows where

Why RMD tax planning can't stop at the 1099-R

The 1099-R is a tax reporting document — it tells you what happened last year. The more valuable work happens before distributions are taken: sizing QCDs to reduce IRMAA exposure, deciding how much to convert to Roth in the pre-RMD window, sequencing which accounts distribute first, and planning year-end withholding to avoid estimated tax underpayments.

A fee-only advisor who specializes in retirement distribution planning will model your full picture — RMDs across all accounts, QCD capacity, IRMAA lookback implications, and Roth conversion headroom — rather than simply filing what the 1099-Rs report.