^{IMPORTANT NOTE: This article has been customized for use by individual US taxpayers investing in securities for information purposes only.  Persons are encouraged to consult a qualified tax professional with the preparation of tax returns.  IB does not provide tax advice.  Traders or dealers in securities, for whom other tax treatment applies, may find the worksheet helpful.  The methodology used to determine the yearly gain or loss, however, differs.  Traders electing the mark-to-market accounting method may consult IRS Instructions for Form 4797, page 2.}

The 2009 Gain/Loss Summary Worksheet calculates the gain or loss for your securities bought and sold from January 1 through December 31 utilizing the Internal Revenue Service (IRS) guidelines.  Every sell trade executed appears, including short sells, on a trade-date basis.  Not all securities, however, are eligible for inclusion.  For additional information, see the following article categories.

Below we have categorized information about this year's "Worksheet" within the IB Knowledge Base.  Each article provides more details to assist with your understanding of this tool.

• Select What's New for the 2009 Gain/Loss Summary Worksheet for a brief overview of new additions.
• Select 2009 Gain/Loss Summary Worksheet, General Explanation, for details on the columns and fields of the “Worksheet.” 
• Select 2009 Gain/Loss Summary Worksheet, Considerations, for details about limitations and adjustments on the “Worksheet.”
• Select Tax Information and Reporting page, then click the Reports and Dates tab for the year-end tax form and worksheet calendar. 
• Select IRS Publication 550 for a comprehensive explanation of the IRS guidelines for determining your gain/loss.
  

IRS Circular 230 Notice: These statements are provided for information purposes only, are not intended to constitute tax advice which may be relied upon to avoid penalties under any federal, state, local or other tax statutes or regulations, and do not resolve any tax issues in your favor.