How do I find the basis of my property?
Homeowners: A homeowner's cost basis generally consists of the purchase price of the property, plus the cost of capital improvements, minus any tax credits (like the Residential Energy Credits) that they've received.
You usually get this information on the confirmation statement that the broker sends you after you have purchased a security. 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.
This information can be found within the 1099-B section of your 1099 Composite statement. For non-covered securities, the information will be available under the area of the 1099-B that is not reported to the IRS.
Your adjusted basis is generally your cost in acquiring your home plus the cost of any capital improvements you made, less casualty loss amounts and other decreases.
The simplest way to calculate the land value and the cost basis for your rental property is to use your property tax bill. Each bill provides a valuation of the land and the buildings on it. This is an approximate value in which the government acts as an appraiser.
What decreases the basis? Things that decrease basis include certain tax credits, insurance reimbursements from losses associated with casualty or theft and deductions for depletion and depreciation. Granting an easement to another party for the use of your property can also decrease basis.
You can calculate your cost basis per share in two ways: Take the original investment amount ($10,000) and divide it by the new number of shares you hold (2,000 shares) to arrive at the new per share cost basis ($10,000/2,000=$5.00).
If you do not report your cost basis to the IRS, the IRS considers your securities to have been sold at a 100% capital gain, which can result in a higher tax liability.
In 2008, Congress enacted mandatory cost basis reporting for brokers and mutual funds. The legislation amended Internal Revenue Code section 1012 (see sections 1012 (a) – (d)) and section 6045 (see section 6045(g)) and added new sections 6045A and 6045B.
- Not reporting all of your income.
- Breaking the rules on foreign accounts.
- Blurring the lines on business expenses.
- Earning more than $200,000.
What can I add to the basis of my house?
- Utility service line extensions to your property.
- Impact fees and zoning costs.
- Some legal fees involved with capital improvement issues.
- Property restoration following casualty losses.
How to calculate capital gains tax on property? In case of long-term capital gain, capital gain = final sale price - (transfer cost + indexed acquisition cost + indexed house improvement cost).

To determine your gain or loss from the sale of your primary home, you start with the amount of gross proceeds reported in Box 2 of Form 1099-S and subtract selling expenses such as commissions to arrive at amount realized. You then reduce that figure by your tax basis in the home to come up with your gain or loss.
Basis is generally the amount of your capital investment in property for tax purposes. Use your basis to figure depreciation, amortization, depletion, casualty losses, and any gain or loss on the sale, exchange, or other disposition of the property. In most situations, the basis of an asset is its cost to you.
To calculate your basis, the average cost method takes the cost of all the shares you have purchased and divides it by the number of shares.
An Example Calculating the Basis in 1031 Exchange
In this case, you calculate your new basis by taking the original property's adjusted basis ($170,000), adding your new mortgage ($250,000), and subtracting the original property's outstanding mortgage ($150,000). This gives you a new tax basis of $270,000.
The calculation of basis consists of your financial contributions into the company plus ordinary income and losses minus distributions (like dividends and other payouts).