Tax basis is the cost of a business asset. It serves as a benchmark for calculating taxable gains or losses upon that asset’s sale or exchange, and it determines a business’s tax liability across jurisdictions.

Though tax basis is a fundamental metric, it’s often misunderstood. These misunderstandings can lead to noncompliance. Below, we’ll discuss what a tax basis is, how it’s defined for different assets, why it matters for business decision-making, and how to avoid miscalculations.

What’s in this article?

• What is a tax basis?
  
• Why does tax basis matter for businesses?
  
• How is the tax basis determined for different types of assets?
  
• How does the tax basis of an asset affect how much tax you owe?
  
• How does an asset’s tax basis interact with tax rates?
  
• What are common mistakes businesses make when calculating their tax basis?
  
• How Stripe Tax can help
  

What is a tax basis?

Tax basis is the value the Internal Revenue Service (IRS) uses to calculate the gain or loss when you sell an asset. It’s not necessarily the same amount that you paid for the asset. Instead, the amount you paid is adjusted to account for everything that’s happened to the asset since you acquired it.

Why does tax basis matter for businesses?

Every time a business sells an asset, that asset’s tax basis determines what amount of the sale is taxable. As a business owner, if you get this amount wrong, you could end up overpaying and losing money, or underpaying and leaving yourself exposed to an audit.

Here’s what’s required when dealing with tax basis:

• Calculating your actual gain or loss: The IRS taxes the difference between your adjusted tax basis and the sale price. A business that sells a building for $500,000 but has an adjusted basis of $400,000 owes tax on $100,000 rather than $500,000.

• Planning when to sell: Knowing an asset’s current basis allows you to estimate the tax bill before you commit to a sale.

• Managing depreciation recapture: Years of depreciation deductions reduce your tax basis, which increases your eventual taxable gain. Understanding where your basis stands helps you anticipate recapture exposure, especially on real estate and business equipment you’ve held for a long time.

• Correctly structuring acquisitions: When you buy a business, you’re buying a bundle of assets, each of which requires its own basis allocation. How that allocation is done affects depreciation deductions for years. It also affects the gain calculation when those assets are eventually sold.

How is tax basis determined for different types of assets?

How you calculate tax basis depends on how an asset came into your possession. Here’s how it works for different asset categories.

Purchased assets

With purchased assets, the tax basis equals the purchase price plus all acquisition costs (e.g., taxes paid at closing, commissions, shipping, installation, testing). If you, say, buy a piece of manufacturing equipment for $50,000 and pay $2,000 in freight and installation charges, your initial basis is $52,000. That number then depreciates over the asset’s useful life under IRS schedules.

Inherited assets

Inherited property is subject to a stepped-up basis equivalent to the asset’s fair market value on the day the owner died rather than what that owner originally paid. Any appreciation that occurred during the decedent’s ownership isn’t taxable to you, but you also can’t claim losses from that period. An executor managing a large enough estate can elect an alternate valuation date up to six months after death, which might be advantageous depending on whether asset values rose or fell within that window.

Gifts

If you sell a gifted asset for a profit, your basis is the donor’s original cost basis. The IRS taxes the full lifetime gain, regardless of who owned the asset when the appreciation occurred. If you sell it for a loss, your basis becomes whichever is lower: the fair market value when you received the gift or the donor’s original cost basis. Always get documentation of the donor’s basis when you receive a business asset as a gift.

Like-kind exchanges

In a Section 1031 exchange, no gain or loss is recognized at the time of the swap, but the tax basis of the property that was relinquished carries over to the replacement property. You’re deferring the tax rather than eliminating it, because the replacement asset inherits the old basis, which affects the gain calculation when that asset is eventually sold.

Partnership interests

In a partnership situation, each partner’s tax basis is the net value of their contribution and share of partnership liabilities, plus any income allocated to them and minus distributions received. The IRS now requires partnerships to use the transactional tax basis method when reporting partner capital account balances on Schedule K-1. This means every contribution, allocation, and distribution must be tracked individually over the life of the partnership.

Business acquisitions

When you buy a business, you need to distribute the purchase price across each acquired asset. This must happen in a specific order by asset class, as defined in IRS Section 1060. The resulting basis for each asset determines future depreciation deductions, as well as eventual gain or loss calculations.

How does the tax basis of an asset affect how much tax you owe?

An asset’s tax basis and your eventual tax bill are directly and proportionally linked. The higher your basis is relative to the sale price, the smaller your gain, and the lower your tax exposure. (The reverse is also true: if you sell an asset for much higher than its tax basis, you end up with a large gain and higher tax exposure.)

Depreciation is the biggest driver of this gap for physical assets. The IRS requires you to depreciate most business property over a set schedule (e.g., commercial real estate over 39 years), which reduces your basis by a fixed amount annually. When you sell, that lower basis produces a larger gain.

The IRS also recovers the tax benefit of depreciation deductions through depreciation recapture, which is taxed at up to 25% for real property. A business that has owned and depreciated a building for many years can face a substantial tax bill even if the sale price only modestly exceeds the original purchase price, because the basis has been declining the entire time.

How does an asset’s tax basis interact with tax rates?

The tax you owe on a gain depends on both the size of the gain and how long you’ve held the asset. The tax basis determines the gain, and the holding period determines the rate.

Here’s how it works in different situations:

• Long-term capital gains (i.e., assets held more than one year): The long-term capital gains tax rate for C corporations is currently 21%—the same as the corporate income tax rate. Rates for individuals and pass-through entities such as LLCs, S corps, and partnerships range from 0% to 20%, depending on personal income.

• Short-term capital gains (i.e., assets held less than one year): When assets have been held for less than one year, gains are taxed at ordinary income rates rather than at preferential capital gains rates. They’re reported separately on Form 8949 and Schedule D rather than folded into regular income reporting.

• Collectibles: These assets can be taxed at up to 28%, regardless of the holding period.

• Small business stock: Stock held for at least five years often qualifies for a 100% gain exclusion. Assets held for shorter durations of three or four years might only receive partial exclusions, with the remaining gain taxed at the 28% cap.

• Depreciation recapture: When you sell a depreciable asset for more than its adjusted basis, the portion of the gain that’s attributable to prior depreciation deductions gets taxed at a higher rate than standard long-term capital gains. With personal property, recaptured depreciation is taxed as ordinary income. With commercial real estate, the recapture rate is capped at 25%.

What are common mistakes businesses make when calculating their tax basis?

Tax basis errors can compound over time. When a sale occurs, those built-up errors lead to the wrong calculation.

Here are some common mistakes:

• Leaving acquisition costs out of the initial basis: Legal fees, commissions, title insurance, transfer taxes, and installation costs all belong in the initial basis amount.

• Failing to track basis adjustments over time: Every capital improvement, every casualty loss, every insurance reimbursement, and every depreciation entry changes your basis number. Businesses should maintain a running record of these adjustments in order to maintain a correct basis.

• Confusing book value with tax basis: Book value and tax basis are different numbers that serve different purposes. Book value follows accounting depreciation schedules, while tax basis follows IRS depreciation rules. The two schedules often diverge, and conflating them produces incorrect gain and loss calculations.

• Using the wrong cost basis method for investment securities: When selling shares acquired at different prices over time, the IRS allows either the average cost method or the First In, First Out (FIFO) method. If businesses don’t make an explicit election or don’t track which method they’re using, they risk applying these methods inconsistently across transactions. This creates reporting errors and potential audit exposure.

• Neglecting partnership basis adjustments: In a partnership, each partner’s basis changes with every income allocation, distribution, and liability shift. Businesses should reconcile partner basis accounts annually to avoid discrepancies.

How Stripe Tax can help

Stripe Tax reduces the complexity of tax compliance so you can focus on growing your business. Stripe Tax helps you monitor your obligations and alerts you when you exceed a sales tax registration threshold based on your Stripe transactions. In addition, it automatically calculates and collects sales tax, value-added tax (VAT), and goods and services tax (GST) on both physical and digital goods and services—in all US states and in more than 100 countries.

Start collecting taxes globally by adding a single line of code to your existing integration, clicking a button in the Dashboard, or using our powerful application programming interface (API).

Stripe Tax can help you:

• Understand where to register and collect taxes: See where you need to collect taxes based on your Stripe transactions. After you register, switch on tax collection in a new state or country in seconds. You can start collecting taxes by adding one line of code to your existing Stripe integration or add tax collection with the click of a button in the Stripe Dashboard.

• Register to pay tax: Let Stripe manage your global tax registrations and benefit from a simplified process that prefills application details—saving you time and simplifying compliance with local regulations.

• Automatically collect tax: Stripe Tax calculates and collects the right amount of tax owed, no matter what or where you sell. It supports hundreds of products and services and is up-to-date on tax rules and rate changes.

• Simplify filing: Stripe Tax seamlessly integrates with filing partners, so your global filings are accurate and timely. Let our partners manage your filings so you can focus on growing your business.

Learn more about Stripe Tax, or get started today.