1099-R Code 4D: Meaning, Taxable Amount, and Reporting

Distribution code 4D on Form 1099-R tells you two things at once. The “4” means the money was paid to a beneficiary after the account owner died. The “D” means the money came from a nonqualified annuity or life insurance contract rather than a 401(k), IRA, 403(b), or government 457(b) plan. If you received a 1099-R showing this code, you inherited a payout from a commercial annuity or life insurance policy, and the gain portion is taxable to you as ordinary income.

What Each Half of the Code Means

Box 7 on Form 1099-R can hold up to two codes, and 4D is a valid combination in the IRS instructions.¹

Code 4 is used “regardless of the age of the participant to indicate payment to a decedent’s beneficiary, including an estate or trust.”¹ So the “4” identifies you as a beneficiary, heir, or estate representative receiving inherited funds.

Code D identifies the source: “a distribution from any plan or arrangement not described in section 401(a), 403(a), 403(b), 408, 408A, or 457(b).”¹ Put plainly, the money did not come from a 401(k), traditional IRA, Roth IRA, 403(b), or government 457(b) plan. It came from something the original owner bought outside those tax-advantaged accounts. Code D also flags that the distribution may be subject to the 3.8% Net Investment Income Tax under IRC Section 1411.

Which Contracts Produce a Code D

“Nonqualified” simply means the arrangement doesn’t get the special tax treatment that workplace retirement plans and IRAs receive. The distribution typically came from one of three sources:

A commercial annuity (fixed, variable, or indexed) purchased directly from an insurance company with after-tax dollars.
A life insurance contract with accumulated cash value or death benefit proceeds that are reportable as taxable income under certain circumstances.
A nonqualified deferred compensation plan sponsored by an employer that falls outside the rules for 401(k) and similar qualified plans.

The original owner funded these contracts with money that had already been taxed. That creates a cost basis, and only the growth above that basis is taxable when it’s distributed.

How the Taxable Amount Is Figured

An inherited nonqualified annuity is taxed differently from most inherited assets. When you inherit stocks or real estate, you usually get a stepped-up basis equal to the fair market value at the date of death, which can eliminate capital gains tax. Annuities don’t get that break. You inherit the original owner’s cost basis, so the accumulated gain inside the contract is still taxable to you.

Cost basis equals the total premiums the original owner paid into the contract. Anything above that is investment growth, and that growth is taxed as ordinary income when it’s distributed. If the deceased paid $100,000 in premiums over the years and the contract was worth $175,000 at death, the $75,000 of gain is taxable to you.

Your 1099-R shows the split. Box 1 is the gross distribution, and Box 2a is the taxable amount. If Box 2b is checked as “Taxable amount not determined,” the payer couldn’t calculate the split, and you’ll need to work it out from the original owner’s premium records.

One thing you won’t owe: the 10% early withdrawal penalty under IRC Section 72(t). Because Code 4 signals a death benefit, that penalty doesn’t apply regardless of your age or the deceased owner’s age at death. Death is a statutory exception.

The 3.8% Net Investment Income Tax

The “D” in the code specifically warns that the payout may be subject to the 3.8% Net Investment Income Tax under IRC Section 1411.¹ The surtax applies to the taxable portion of the annuity payout if your modified adjusted gross income exceeds $200,000 for single filers or $250,000 for married couples filing jointly. Those thresholds are set by statute and are not adjusted for inflation.

A large inherited annuity payout can push your income over the threshold in a single year even if you’re normally well below it. If the contract gives you flexibility on timing, spreading distributions across several tax years can reduce or avoid the surtax. Whether that’s possible depends on the contract terms and whether the original owner had already started receiving payments, since inherited annuities have their own required distribution timelines.

Where the Numbers Go on Your Return

A Code 4D distribution is reported on the pension and annuity lines of Form 1040, not the IRA lines. Box 1 (gross distribution) goes on Line 5a, and Box 2a (taxable amount) goes on Line 5b.²

If Box 2a has a figure, transfer it straight over. If Box 2a is blank or Box 2b is checked, you’ll need to calculate the taxable portion yourself. Pull the original owner’s premium payment records, the annuity contract, and any prior 1099-R forms to establish the basis.

Federal income tax already withheld appears in Box 4 and counts as a tax payment on your return. If the withholding rate doesn’t match your actual bracket, you’ll either owe more or get some back when you file.

Code D Is Not a Prohibited Transaction

A common mix-up treats Code D as if it signals a prohibited transaction. It doesn’t. Prohibited transactions involving IRAs get Code 5, and Code 5 cannot be combined with any other code.¹ Code 5 means an IRA lost its tax-exempt status because the owner or a disqualified person misused the funds, and the entire balance was treated as distributed. Code D has nothing to do with rule violations. It only identifies the type of plan the money came from. If your 1099-R shows Code 4D, no one did anything wrong; you inherited money from a nonqualified annuity or life insurance contract after the owner’s death.

If the Code Looks Wrong

Custodians and insurance companies occasionally assign the wrong distribution code. If Code 4D doesn’t fit your situation, for instance if the money actually came from a traditional IRA or 401(k), contact the payer and request a corrected 1099-R. Most coding errors get resolved that way.

If the payer won’t issue a correction and the filing deadline is approaching, you can file using IRS Form 4852 as a substitute for the 1099-R. Form 4852 asks you to explain why the original form is wrong and provide the figures you believe are accurate. The IRS warns that misusing this form to duck legitimate tax can trigger accuracy penalties of 20%, civil fraud penalties of 75%, or a $5,000 penalty for frivolous submissions, so use it only when you have a genuine factual basis for the correction.³ If a corrected 1099-R arrives later and shows your original return was wrong, file an amended return on Form 1040-X.

1
Internal Revenue Service. 2025 Instructions for Forms 1099-R and 5498
2
Internal Revenue Service. Instructions for Form 1040
3
Internal Revenue Service. Form 4852, Substitute for Form W-2, Wage and Tax Statement, or Form 1099-R