Schedule D (Form 1040)

Schedule D filing checklist

Filing Schedule D is easier when you follow a clear sequence of steps. Use this checklist to make sure you complete each part of the process in the right order and avoid common oversights.

• Determine whether you need to file Schedule D by reviewing your capital asset transactions for the tax year.
• Gather all Forms 1099-B from your brokerages showing proceeds, cost basis and dates of sale.
• Collect any Forms 1099-DIV that include capital gain distributions in box 2a.
• Check whether you have a capital loss carryover from the prior year using last year's Schedule D or the Capital Loss Carryover Worksheet.
• Complete Form 8949 for any transactions that require adjustments or where the basis was not reported to the IRS.
• Transfer your Form 8949 totals to Schedule D, Part I (short-term) and Part II (long-term).
• Enter capital gain distributions on Schedule D, line 13.
• Complete Part III to calculate your net capital gain or loss.
• If applicable, work through the Qualified Dividends and Capital Gain Tax Worksheet or the Schedule D Tax Worksheet.
• Carry your final figure to the appropriate line on Form 1040.
• Attach Schedule D and Form 8949 to your return before filing.

What documents do you need for reporting capital gains?

Having the right paperwork on hand before you start filling out Schedule D saves time and reduces the chance of errors. The documents you need depend on the types of capital asset transactions you had during the year.

Brokerage and investment documents

Your brokerage firm should provide the core documents for most investment sales. These are the forms and records to collect:

• Form 1099-B, which reports proceeds from broker transactions, cost basis and whether the basis was reported to the IRS
• Form 1099-DIV, which shows capital gain distributions from mutual funds or REITs in box 2a
• Year-end brokerage account statements that summarize all buy and sell activity
• Trade confirmations for any transactions not captured on a 1099-B

Real estate and other asset documents

If you sold property or other capital assets, you will need supporting records for those transactions as well. Keep the following on hand:

• Closing statements (HUD-1 or Closing Disclosure) from real estate sales
• Records of your original purchase price and any improvements that increased your cost basis
• Form 1099-S, which reports proceeds from real estate transactions
• Appraisals or fair market value documentation for inherited or gifted assets

Partnership and trust documents

If you received income from a partnership, S corporation, estate or trust, look for Schedule K-1. This form reports your share of capital gains and losses from these entities. Include K-1 figures on the appropriate lines of Schedule D.

Investment sales record checklist

Accurate records of every investment sale are essential for calculating the correct gain or loss on Schedule D. Missing or incomplete data is one of the most common reasons for IRS notices after filing.

For each sale or disposition of a capital asset, make sure you have recorded the following details:

• Description of the asset (for example, 100 shares of XYZ stock or rental property at 123 Main Street)
• Date you originally acquired the asset
• Date you sold or disposed of the asset
• Your cost basis, including the purchase price plus any commissions or fees
• Adjustments to basis, such as reinvested dividends, stock splits or improvements to real property
• Total proceeds from the sale, minus any selling expenses
• Whether the holding period was short-term (one year or less) or long-term (more than one year)
• Any wash-sale adjustments if you repurchased a substantially identical security within 30 days

Keeping this information organized throughout the year makes tax time far less stressful. A simple spreadsheet or investment tracker updated after each transaction is one of the easiest ways to stay on top of your records.

Year-end capital gains tax checklist

The weeks before December 31 are the best time to review your portfolio and plan for capital gains taxes. Taking action before the year closes can directly affect what you owe when you file.

Review your realized gains and losses

Start by pulling a year-to-date realized gain and loss report from your brokerage. This shows all the sales that have already occurred and gives you a clear picture of where you stand. Pay attention to whether your gains are short-term or long-term, since the tax rates differ significantly.

Look for tax-loss harvesting opportunities

If you have unrealized losses in your portfolio, consider whether selling those positions before year-end could offset your gains. Losses can be used to reduce capital gains dollar for dollar. If your losses exceed your gains, you can deduct up to $3,000 against ordinary income and carry any remaining balance forward to future years.

Be mindful of the wash-sale rule. If you repurchase the same or a substantially identical security within 30 days before or after the sale, the IRS will disallow the loss.

Confirm your cost basis information

Check that your brokerage has accurate cost basis records for all positions you sold during the year. Errors in cost basis are one of the most common Schedule D mistakes. If you transferred shares between brokers, the receiving firm may not have complete records, so verify the data before year-end.

Organize your forms and file on time

Make sure you have received or have access to all 1099-Bs, 1099-DIVs, K-1s and any other relevant tax documents. If you are waiting on a K-1 from a partnership or trust, note that these are sometimes issued after the standard filing deadline. In that case, you may need to file an extension using Form 4868 to avoid penalties.

Need to file a Schedule D?

Our free Schedule D (Form 1040) template gives you a clear starting point for reporting your capital gains and losses. Use a fillable Schedule D form to compile your gains, losses and supporting details so everything is ready when you file. Try it today for free.

Try the free Schedule D form