Basis Schedule for Partnerships and S-Corps: Debt and Form 7203

The basis schedule rules for partnerships and S corporations track your running investment in the business and control three tax outcomes: whether the distributions you receive are tax-free, how much of the entity’s losses you can currently deduct, and how much gain or loss you recognize when you sell your interest. Your basis starts with what you paid or contributed, climbs when income is allocated to you or you put more in, and falls when the business allocates you losses or pays you distributions. Miss the schedule and you can pay tax on your own money coming back, lose deductions you were entitled to, or overstate a gain on sale.

What the Schedule Tracks

Your starting basis is the cash you contributed or the fair market value of property you transferred when you acquired the interest. From there, several categories of activity move the number each year:

Ordinary business income or loss allocated to you on Schedule K-1.
Separately stated items such as capital gains, charitable contributions, and interest income, which get their own K-1 lines because they receive special treatment on your personal return.
Tax-exempt income the business earned, which still raises your basis because the entity’s assets grew even though you owed no tax on the growth.
Nondeductible expenses like penalties or the nondeductible portion of meals, which reduce your basis even though they gave you no tax benefit.
Distributions of cash or property, which reduce basis as value moves out to you.
Additional contributions of cash or property after your initial buy-in, which raise it.

Tracked year after year, these flows keep your basis in step with the economic stake you actually hold.

The Debt Rule Is Where Partnerships and S Corps Split

The biggest difference between the two entity types involves borrowed money. A partner’s share of partnership liabilities counts as a deemed contribution that increases the partner’s basis. If your partnership takes out a $500,000 loan and your allocable share is 50%, your basis climbs $250,000 without you writing a check.¹ This matters enormously in real estate partnerships, where most of the capital is financed.

S-corporation shareholders get no equivalent benefit from corporate-level debt. The only path to debt basis is a direct loan from the shareholder to the corporation. Guaranteeing a bank loan the corporation takes out does not count. The loan has to run directly from you to the company, with a written agreement, a stated interest rate, a maturity date, and real repayment terms.² Debt basis matters because once your stock basis reaches zero, only debt basis lets you deduct further losses.³

Running the Math in the Right Order

For S-corporation shareholders, the IRS prescribes a strict four-step sequence performed on the last day of the corporation’s tax year:⁴

Step 1. Add your share of ordinary income, separately stated income items, and tax-exempt income.
Step 2. Subtract non-dividend distributions, but not below zero.
Step 3. Subtract nondeductible, non-capitalized expenses, but not below zero.
Step 4. Subtract ordinary losses and separately stated loss or deduction items, but not below zero.

Order changes the answer. Both the taxability of a distribution and the deductibility of a loss depend on where basis sits when you apply them. Adding income first gives more room to absorb distributions tax-free before losses come off at the end.

Partnership basis follows the same logic of increasing for income and contributions and decreasing for distributions, losses, and nondeductible expenses. The specific ordering is governed by the partnership agreement and the applicable regulations rather than a single IRS worksheet.

The Zero Floor

Basis cannot go negative. If your losses and deductions exceed what’s left after income and distributions, the excess is suspended. For S-corporation shareholders, disallowed losses carry forward indefinitely and become deductible in any future year when you restore enough basis to absorb them.³ Partners face the same treatment: losses exceeding the adjusted basis of the partnership interest at year-end are disallowed and carried to a year when basis increases.⁵

You restore basis by contributing more capital, receiving an allocation of income, or, if you’re a partner, picking up additional shares of partnership liabilities. Once basis climbs above zero, the suspended losses become available again.

When Distributions Turn Taxable

Distributions are tax-free only up to your remaining basis. The moment a distribution exceeds that number, the excess becomes taxable. For S-corporation shareholders, a non-dividend distribution in excess of stock basis is taxed as long-term capital gain.⁴ For partners, money distributed in excess of the partner’s basis is treated as gain from the sale of the partnership interest.⁶

This is the most common trap for owners who don’t maintain a schedule. A draw feels like your own money coming back, and often it is. But when prior-year losses or earlier distributions have eroded basis, a routine withdrawal can trigger a surprise tax bill. Update the schedule before any significant distribution.

Basis Is Not the Only Loss Limit

Even losses that clear the basis test can be blocked further down the chain. Federal law imposes a mandatory sequence of four limitations applied in order:⁷

Basis. Losses cannot exceed your adjusted basis in the entity, meaning stock and debt basis for S-corps and outside basis for partnerships.
At-risk. Of what survives the basis test, you may only deduct amounts for which you are personally at economic risk, reported on Form 6198.⁸
Passive activity. Losses from activities in which you don’t materially participate generally offset only passive income, not wages or investment income.⁹
Excess business loss. After the first three gates, remaining net business loss above the statutory threshold is disallowed for the year and converted into a net operating loss carryforward.

Each gate has its own carryforward rules. Basis-limited losses wait for basis. At-risk losses wait for an increase in the at-risk amount. Passive losses wait for passive income or a fully taxable disposition of the activity.⁹ Owners who track only basis are the ones caught off guard when a loss clears the first gate and gets stopped at the second or third.

Gifted and Inherited Interests

Not every owner buys in. If you received your interest as a gift, your starting basis is generally the donor’s adjusted basis at the time of the gift.¹⁰ A wrinkle applies when the fair market value at the time of the gift was lower than the donor’s basis: for calculating a loss on a later sale, you use the fair market value instead. This dual-basis rule keeps donors from passing along built-in losses. Any gift tax the donor paid can also increase your basis, but only up to the property’s fair market value at the time of the gift.

Inherited interests work differently and usually more favorably. The basis of property acquired from a decedent resets to fair market value as of the date of death.¹¹ If your parent held a partnership interest with a $50,000 adjusted basis but worth $300,000 at death, your starting basis is $300,000. The decedent’s years of income, losses, and distributions are wiped clean. Getting the date-of-death valuation right matters because every dollar missed on the starting basis is a dollar you’ll overpay later.

Selling Your Interest

When you sell, your basis schedule determines how much of the price is taxable. Gain equals what you receive minus your adjusted basis at the time of sale. For both partnerships and S corporations, that gain is generally capital gain.¹²

Partnership sales carry an extra layer. If the partnership holds “hot assets” such as unrealized receivables or inventory items, a portion of your gain is recharacterized as ordinary income. The difference between capital and ordinary rates can be significant, so a selling partner needs to know what sits inside the partnership, not just the total price. S-corporation stock sales don’t face this same recharacterization, though stock sales versus asset sales come with their own planning considerations.

An inaccurate schedule can push you to report more gain than you actually have, or less and face penalties later. If you’ve held the interest for years without tracking basis, reconstructing the schedule before a sale is worth the cost.

Records You Need to Keep

An accurate schedule depends on financial records reaching back to the day you acquired the interest. The core documents:

Schedule K-1s for every year of ownership. Each year’s K-1 provides the raw data that feeds the calculation for that period.
Proof of your initial investment. Bank statements, wire confirmations, or closing documents showing what you paid or contributed.
Records of additional contributions. Bank records for cash, appraisals for property.
Loan documentation for S-corp shareholders. Keep the promissory note, evidence of interest payments, and records of any repayments. Without proper documentation, the IRS can deny debt basis entirely.²
The partnership or operating agreement, which sets ownership percentages, profit-sharing ratios, and rules for distributions and capital calls.

If prior-year K-1s are missing, you can request transcripts from the IRS on Form 4506-T. Rebuilding a schedule from partial records is tedious but far better than guessing, especially before a sale or a large loss claim.

How You Report Basis

S-Corporation Shareholders: Form 7203

S-corporation shareholders report stock and debt basis on Form 7203, which replaced the worksheet formerly buried in the Schedule K-1 instructions.¹³ Attach it to your individual return in any year when:

You claim a deduction for your share of an S-corporation loss, including suspended losses from a prior year.
You received a non-dividend distribution.
You sold or otherwise disposed of stock.
You received a loan repayment from the S corporation.

The form works line by line: beginning stock basis, increases for income and contributions, decreases for distributions, decreases for nondeductible expenses, then decreases for losses. A separate section covers debt basis. Tax software typically generates the form from your K-1 data, but you still need to verify that the beginning balance ties to your prior-year ending basis.¹⁴

Partners: No Mandatory Form

Partners have no federal filing equivalent to Form 7203. The IRS expects you to maintain outside basis records, but they live on your own worksheet. Some tax software generates a schedule, and your partnership may show a capital account summary on the K-1, but the capital account is not the same as outside basis. Your outside basis includes your share of partnership liabilities; the capital account does not.¹ Treating them as interchangeable is a common and expensive mistake.

No mandatory form doesn’t lower the stakes. If the IRS challenges a loss or questions a distribution, the burden of proof is yours. A well-documented worksheet with supporting K-1s, contribution records, and liability schedules is the defense.

1
Office of the Law Revision Counsel. 26 U.S. Code 752 – Treatment of Certain Liabilities
2
Internal Revenue Service. Valid Shareholder Debt Owed by S Corporation
3
Office of the Law Revision Counsel. 26 U.S. Code 1366 – Pass-Thru of Items to Shareholders
4
Internal Revenue Service. S Corporation Stock and Debt Basis
5
Office of the Law Revision Counsel. 26 U.S. Code 704 – Partner’s Distributive Share
6
Office of the Law Revision Counsel. 26 U.S. Code 731 – Extent of Recognition of Gain or Loss on Distribution
7
Internal Revenue Service. Passive Activity and At-Risk Rules
8
Internal Revenue Service. About Form 6198, At-Risk Limitations
9
Office of the Law Revision Counsel. 26 U.S. Code 469 – Passive Activity Losses and Credits Limited
10
Office of the Law Revision Counsel. 26 U.S. Code 1015 – Basis of Property Acquired by Gifts and Transfers in Trust
11
Office of the Law Revision Counsel. 26 U.S. Code 1014 – Basis of Property Acquired From a Decedent
12
Office of the Law Revision Counsel. 26 U.S. Code 741 – Recognition and Character of Gain or Loss on Sale or Exchange of Interest in Partnership
13
Internal Revenue Service. Instructions for Form 7203 – S Corporation Shareholder Stock and Debt Basis Limitations
14
Internal Revenue Service. About Form 7203, S Corporation Shareholder Stock and Debt Basis Limitations