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The Daily Insight

What if there is no cost basis?

Author

Sarah Duran

Published Apr 05, 2026

If options 1 and 2 are not feasible and you are not willing to report a cost basis of zero, then you will pay a long-term capital gains tax of 10% to 20% (depending on your tax bracket) on the entire sale amount. Alternatively, you can estimate the initial price of the share.

Does selling covered calls lower your cost basis?

Selling a covered call does not change the cost basis of a stock. It is a separate transaction for tax purposes. You may have a long term profit or loss on the stock while you have a short term loss or profit on the covered call.

What happens to cost basis when someone dies?

If you inherit stock, the cost basis does not pass from the deceased person to you. Instead, the cost basis is generally automatically reset either when the deceased person passes away or, if the estate decides, six months after that date.

How do you calculate cost basis on a death date?

Tax Basis of Inherited Stock Instead, to calculate the value of the stock on the date of death, take the average of the highest selling price and the lowest selling price of the stock on that date. For example, say you inherited shares of a company from someone who died on June 1.

Is cost basis reported to IRS?

You—the taxpayer—are responsible for reporting your cost-basis information accurately to the IRS. You do this in most cases by filling out Form 8949. (For tax history junkies, this form replaced the Form 1040 Schedule D-1 in tax year 2011 for most cost-basis reporting.)

What happens to cost basis when assets are inherited?

When assets are inherited, the cost basis is stepped-up to the value on the date of death (or six months later if alternate valuation is used). For example, let’s assume that a parent leaves a stock to their child. The stock was originally purchased for $10 per share and is valued at $50 on the date of death.

How to enter stock sale with no cost basis or acquisition date?

June 3, 2019 1:16 PM How do I enter stock sale with no cost basis or acquisition date? I sold a 20+ yearl old stock that I received as a gift. I don’t have the exact date of acquisition nor the cost basis and it is not possible to get the info for that. Federal tax has been withheld for the proceeds. How do I report the cost/basis?

Is it common to miss cost basis information?

Despite the fact that it is not necessarily uncommon for some taxpayers to be missing cost basis information, it is important to remember that it is ultimately your responsibility to keep careful records.

When does cost basis step up at death?

Despite all the changes in the new tax bill, the step-up in cost basis at death remains. When assets are inherited, the cost basis is stepped-up to the value on the date of death (or six months later if alternate valuation is used). For example, let’s assume that a parent leaves a stock to their child.