To report Net Unrealized Appreciation on a tax return, you handle the transaction in two stages: in the year of the lump-sum distribution, report the cost basis of the employer stock as taxable pension income on Form 1040 using the figures from Form 1099-R, and in the year you later sell the shares, report the sale on Form 8949 and Schedule D using that same basis so the appreciation is taxed as a capital gain.
Confirm the Distribution Qualifies
NUA treatment is only available when the employer securities come out as part of a lump-sum distribution, meaning the entire balance of the employer’s qualified plans of the same type is withdrawn in a single tax year. The distribution must also be triggered by a qualifying event: the participant’s death, reaching age 59 1/2, separation from service, or disability.1Office of the Law Revision Counsel. 26 U.S.C. § 402
When the distribution qualifies, the original cost of the shares is included in gross income for the year of the distribution and taxed as ordinary income. The appreciation that occurred inside the plan is excluded from income that year and is not taxed until the shares are sold.1Office of the Law Revision Counsel. 26 U.S.C. § 402
Read the Numbers Off Form 1099-R
The plan administrator issues Form 1099-R for the distribution. Four boxes matter for NUA reporting:
- Box 1, Gross Distribution: the total fair market value of the stock plus any cash received.
- Box 2a, Taxable Amount: the portion that goes into income this year. For an NUA distribution this is typically the cost basis of the shares.
- Box 4, Federal Income Tax Withheld: any tax the administrator already sent to the IRS.
- Box 6, Net Unrealized Appreciation: the growth that is excluded from income now and deferred until sale.1Office of the Law Revision Counsel. 26 U.S.C. § 402
Also check Box 7, the distribution code. It tells the IRS the reason for the distribution and whether early-distribution penalties should apply.
Report the Distribution on Form 1040
Enter the gross distribution from Box 1 of the 1099-R on Form 1040, Line 5a (pensions and annuities). Enter the taxable amount from Box 2a on Line 5b. The Box 6 NUA amount is not added to Line 5b; it stays out of income until you sell the shares.2IRS. Form 1040 (2025)1Office of the Law Revision Counsel. 26 U.S.C. § 402
If Box 4 shows federal tax withheld, report that amount on Form 1040, Line 25b. It credits against your total tax for the year.2IRS. Form 1040 (2025)
If the Early-Distribution Penalty Applies
A 10% additional tax can apply when the participant is under age 59 1/2 at the time of the withdrawal. The penalty is figured on the portion of the distribution that is includible in gross income. Exceptions include distributions on account of death, disability, or separation from service during or after the year the employee reached age 55.3Office of the Law Revision Counsel. 26 U.S.C. § 72
The 10% tax is reported on Form 5329. If that is the only additional tax owed, it can sometimes be entered directly on the return without filing the full Form 5329.4IRS. Form 5329 (2025)
Report the Stock Sale in the Year You Sell
When you later sell the employer securities, the transaction goes on Form 8949. List the acquisition date, the sale date, the sale proceeds, and the cost basis. The basis is the amount that was already taxed as ordinary income at the time of the original distribution, not the price the plan originally paid years earlier for the employer’s recordkeeping.5IRS. Form 8949 (2025)
The totals from Form 8949 carry to Schedule D, where capital gains and losses for the year are summarized. The gain above the basis is where the deferred NUA finally gets taxed, now as a capital gain rather than as ordinary income.5IRS. Form 8949 (2025)
Keep the Form 1099-R from the distribution year with your permanent records. You will need the Box 2a cost basis to prove the figures on Form 8949 whenever the shares are eventually sold, which may be many years after the distribution itself.