At-Risk Basis vs. Tax Basis: Debt, Loss Limits, and Recapture

At-risk basis and tax basis are two separate ceilings on how much pass-through loss you can deduct, and your loss has to clear both. Tax basis counts your entire economic stake in a partnership or S corporation, including your share of certain entity debt. At-risk basis counts only the dollars you could actually lose if the business collapsed tomorrow. Because at-risk strips out debt you aren’t personally on the hook for, it is usually the smaller of the two numbers and usually the one that stops your deduction first.

What Tax Basis Measures

Tax basis is a running account of your investment in the entity. For a partner, it starts at the cash you contributed plus the adjusted basis of any property you transferred in.¹ For an S-corporation shareholder, it starts at what you paid for the stock or the adjusted basis of property exchanged for it.

From there the number moves with the business. Your share of taxable income and tax-exempt income pushes it up. Distributions and your share of losses pull it down.² S-corporation shareholders adjust their stock basis on the same directional pattern.³ Basis cannot go below zero. A cash distribution above your basis is taxed as gain on the sale of your interest, usually capital gain.

Partnership Debt Adds to Tax Basis

This is where partnerships pull ahead. When a partnership borrows, each partner’s allocated share of that debt is treated as a cash contribution for basis purposes.⁴ Both recourse debt (someone is personally liable) and nonrecourse debt (the lender’s only remedy is the collateral) flow through. A partner’s tax basis can therefore end up much larger than the actual dollars they wrote checks for.

S-Corporation Debt Does Not

An S corporation’s borrowing gives shareholders nothing. If the corporation takes out a bank loan, your stock basis does not move. The only way for a shareholder to build additional basis for deducting losses is to lend money to the corporation directly, which creates “debt basis.”⁵ Personally guaranteeing a corporate loan does not count. Shareholders who assume otherwise regularly discover their allowable loss is smaller than they expected.

What At-Risk Basis Measures

At-risk basis starts on the same footing as tax basis: cash in, plus the adjusted basis of contributed property. The two numbers separate as soon as debt enters the picture. At-risk basis includes only amounts you could actually lose if the activity went to zero.⁶

Recourse debt qualifies, because a failed business leaves the lender free to come after your personal assets. Standard nonrecourse debt does not qualify. If the venture fails you hand over the collateral and walk, so no personal dollars are on the line, and Section 465 excludes that financing from the calculation.⁶

The Real Estate Carve-Out

Real estate investors get an exception called qualified nonrecourse financing. If the loan comes from a bank or other commercial lender (or from a federal, state, or local government), is secured by real property used in the activity, is not convertible, and does not come from someone with an ownership interest in the activity, it counts toward at-risk even though no one is personally liable.⁶ Without this exception most leveraged real estate deals would throw off losses no investor could use.

Other Amounts That Do Not Count

Section 465 also strips out amounts protected against loss through guarantees, stop-loss agreements, or similar arrangements. Money borrowed from a person who holds an ownership interest in the activity (other than purely as a creditor) is excluded as well, which stops related parties from stacking loans on each other to inflate deductible losses.⁶

How Each Type of Debt Moves Each Number

The simplest way to see the split is to run the categories side by side:

Cash contributions and the basis of contributed property increase both tax basis and at-risk basis equally.
Recourse debt increases both tax basis and at-risk basis.
Standard nonrecourse debt increases a partner’s tax basis but does not increase at-risk basis.
Qualified nonrecourse real estate financing increases both.
Loans from related parties with ownership interests can increase tax basis but do not increase at-risk basis.
S-corporation entity-level debt increases neither. Only a direct shareholder loan to the corporation builds basis for loss purposes.

In a leveraged partnership that holds anything other than real estate, this gap can be large. A partner might carry $200,000 of tax basis and only $50,000 at risk. The deductible loss stops at $50,000, and the higher tax basis figure is irrelevant to that year’s return.

How the Two Limits Apply to an Actual Loss

Basis and at-risk are the first two filters a pass-through loss has to pass through, and they are applied in that order. The basis test comes first: your share of the loss cannot exceed your adjusted tax basis in the entity, which for an S-corporation shareholder means stock basis plus any direct loans to the corporation.⁷ Whatever survives then hits the at-risk test under Section 465, and only the portion still standing after both can move on to any further limitations, such as the passive activity rules or the Section 461(l) excess business loss cap.⁸

Put numbers on it. Say your share of a partnership loss is $80,000, your tax basis is $60,000, and your at-risk amount is $40,000. Twenty thousand is blocked at the basis test because your basis only supports $60,000 of loss. That $60,000 then goes to the at-risk test, and another $20,000 is blocked because only $40,000 is actually at risk. You are left with $40,000 to carry into whatever downstream limitations apply.

What Happens to the Losses You Cannot Deduct

Losses blocked at either tier are not gone. They carry forward indefinitely, each in its own bucket, waiting for the specific condition that stopped them to change.

Basis-limited losses free up when you add capital, when the entity generates income that lifts your basis, or when your share of partnership liabilities increases. For S-corporation shareholders, suspended basis losses carry forward and are treated as newly incurred in the following year.⁷

At-risk-limited losses free up when your at-risk amount goes up, typically through more contributions, an income allocation, or a change in how the entity is financed (for example, refinancing nonrecourse debt into recourse debt you personally sign for).

These buckets have to be tracked separately. A contribution funded with nonrecourse borrowing might lift your tax basis without touching your at-risk amount. An increase in at-risk does nothing for losses that are stuck further downstream at the passive activity tier. Sloppy tracking is where most deduction disputes start, and the IRS has forms designed specifically to surface the numbers.

At-Risk Recapture: When a Prior Deduction Comes Back

The at-risk rule is not just a forward-looking cap. If your at-risk amount drops below zero at the end of a tax year, you have to include the negative amount in gross income for that year.⁶ Common triggers include refinancing recourse debt into nonrecourse debt, taking distributions that draw your at-risk balance down, and losing a personal guarantee.

The recaptured amount is treated as a deduction allocated to the same activity in the next tax year, so the effect is timing rather than permanent. It can still produce an unwelcome tax bill in the year it lands. The recapture is capped at the total at-risk losses you have deducted in prior years, less any amounts previously recaptured, so you never owe back more than you benefited.⁶

The Forms and the Penalty for Getting It Wrong

Each limitation has its own form. Basis tracking for S-corporation shareholders goes on Form 7203, which is required whenever the shareholder claims a loss, receives a non-dividend distribution, disposes of stock, or receives a loan repayment from the corporation.⁹ At-risk calculations run through Form 6198, required if you had amounts not at risk invested in an at-risk activity that generated a loss during the year.¹⁰ Passive activity limits (the next tier down) go on Form 8582.¹¹

Your Schedule K-1 gives you the raw allocations of income, loss, and liabilities. Running those numbers through basis and at-risk is on you, not the entity. Overstating either figure to get a bigger deduction draws a 20% accuracy-related penalty on the resulting underpayment.¹² Contemporaneous records of every contribution, distribution, debt allocation, and guarantee change are what stand between you and that penalty.¹³

1
Office of the Law Revision Counsel. 26 USC 722 – Basis of Contributing Partner’s Interest
2
Office of the Law Revision Counsel. 26 U.S. Code 705 – Determination of Basis of Partner’s Interest
3
Office of the Law Revision Counsel. 26 U.S. Code 1367 – Adjustments to Basis of Stock of Shareholders
4
Office of the Law Revision Counsel. 26 U.S. Code 752 – Treatment of Certain Liabilities
5
Internal Revenue Service. S Corporation Stock and Debt Basis
6
Office of the Law Revision Counsel. 26 U.S. Code 465 – Deductions Limited to Amount at Risk
7
Office of the Law Revision Counsel. 26 USC 1366 – Pass-Thru of Items to Shareholders
8
Internal Revenue Service. Publication 925 – Passive Activity and At-Risk Rules
9
Internal Revenue Service. About Form 7203 – S Corporation Shareholder Stock and Debt Basis Limitations
10
Internal Revenue Service. Instructions for Form 6198
11
Internal Revenue Service. About Form 8582 – Passive Activity Loss Limitations
12
Office of the Law Revision Counsel. 26 U.S. Code 6662 – Imposition of Accuracy-Related Penalty on Underpayments
13
Internal Revenue Service. Accuracy-Related Penalty