How do I find a stock's cost basis? (2024)

SOLVEDby TurboTax698Updated December 14, 2023

If you know when the stock was purchased, here are some tips:

  • Sign in to your brokerage account
    • Although your broker may not include your basis on your 1099-B, it doesn't necessarily mean they don't have it.
    • If your current broker was the selling agent, there's usually a wealth of documentation available in your online brokerage account that can help, such as detailed reports on each sale.
  • Look at previous broker statements
    • Review your records for the trade confirmation when you bought the shares. (It's always a good idea to save these for tax purposes.)
    • If you purchased the stock at different times or haven't sold all the shares at once, you may have more than one trade confirmation statement.
  • Contact your brokerage firm
    • Your broker should have a record of the purchase, if you bought the stock from them.
    • If not, they might still be able and willing to look up the historical stock price for you.
  • Go online for historical stock prices
    • For example, view the historical section atMarketwatchor Nasdaq. It's generally acceptable to take the lowest and highest price from a given day and average them to arrive at a cost. It's also acceptable to use the closing price on the day of purchase.
    • These free services may not include events that affect basis, such as reinvested dividends, spin-offs, and stock splits.
  • Go directly to the source
    • Many companies have an investor relations section on their website that contains historical stock data. You can also call the company's shareholder services department for help.
    • For shares purchased more than 10 years ago, go to a public library or law school library and look for back issues of newspapers, such as USA Today, to find the high and low price on the date of purchase.

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How do I find a stock's cost basis? (2024)

FAQs

How do I figure out the cost basis of stock? ›

For stocks and bonds, the cost basis is generally your purchase price for the securities, including reinvested dividends or reinvested capital gains distributions, plus additional costs such as the commission or other fees you paid to complete the transaction.

What to do if you can't find the cost basis for stock? ›

If you know when the stock was purchased, here are some tips:
  1. Sign in to your brokerage account. ...
  2. Look at previous broker statements. ...
  3. Contact your brokerage firm. ...
  4. Go online for historical stock prices. ...
  5. Go directly to the source.
Dec 14, 2023

How do you calculate cost base for shares? ›

To calculate the equity cost basis for a non-dividend-paying stock, you add the purchase price per share plus fees per share. Reinvesting dividends increases the cost basis of the holding because dividends are used to buy more shares.

How does IRS verify cost basis? ›

The IRS expects taxpayers to keep the original documentation for capital assets, such as real estate and investments. It uses these documents, along with third-party records, bank statements and published market data, to verify the cost basis of assets.

What is the formula for average cost basis? ›

Cost basis represents the initial value of a security or mutual fund that an investor owns. The average cost is calculated by dividing the total amount in dollars invested in a mutual fund position by the number of shares owned.

What happens if 1099-B does not show cost basis? ›

How can we help? The Form 1099-B that you receive might only report the sale date and sales proceeds. If it does not report the date acquired or cost basis, you still need to enter that information when you report your Form 1099-B in the TaxAct program so that it will transfer to Schedule D and/or Form 8949.

What happens if you don't know the cost basis of gifted stock? ›

The cost basis of stock you received as a gift ("gifted stock") is determined by the giver's original cost basis and the fair market value (FMV) of the stock at the time you received the gift. If the FMV when you received the gift was more than the original cost basis, use the original cost basis when you sell.

What is the unknown cost basis of a stock? ›

Sometimes, unknown cost basis is simply the result of an account pre-dating cost basis records. Other times, unknown cost basis results from a transfer of shares from one account or account type to another.

How to find the cost basis of an old mutual fund? ›

To calculate average basis:
  1. Add up the cost of all the shares you own in the mutual fund.
  2. Divide that result by the total number of shares you own. This gives you your average per share.
  3. Multiply the average per share by the number of shares sold.
Nov 3, 2023

What is the cost basis for awarded stock? ›

Cost basis is the price paid to acquire shares plus commissions and any fees. Stock plans enable employers to issue company stock for services rendered. Employers issue company stock as part of compensation to their employees.

Can I use an average cost basis for stocks? ›

You can only use the average cost method for mutual funds and most ETFs (exchange-traded funds), and for stocks acquired as part of a dividend reinvestment plan on or after January 1, 2011. Are you investing in something other than mutual funds?

How do you find the cost per share of a stock? ›

Average Cost per share = Total purchases ($2,750) ÷ total number of shares owned (56.61) = $48.58. To calculate the average cost, divide the total purchase amount ($2,750) by the number of shares purchased (56.61) to figure the average cost per share = $48.58.

How do you figure out the cost basis on dividend reinvested stock? ›

The simplest way to keep track of your cost basis is to note the amount of dividends on which you're taxed from year to year. By adding those amounts to what you originally paid for shares, you'll accurately reflect your total cost basis for the position.

How do I determine the cost basis of my business? ›

At a very basic level, the cost basis is the cost of your small business. The basis calculation consists of your financial contributions to the company plus ordinary income and losses minus distributions (like dividends and other payouts).

How to calculate capital gains tax on stock? ›

Capital gain calculation in four steps
  1. Determine your basis. ...
  2. Determine your realized amount. ...
  3. Subtract your basis (what you paid) from the realized amount (how much you sold it for) to determine the difference. ...
  4. Review the descriptions in the section below to know which tax rate may apply to your capital gains.

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