CPA Exam Entity Taxation: Partnerships and S Corporations
Last updated: May 2, 2026
Entity Taxation: Partnerships and S Corporations questions are one of the highest-leverage areas to study for the CPA Exam. This guide breaks down the rule, the elements you need to recognize, the named traps that catch most students, and a memory aid that scales to test day. Read it once, then practice the same sub-topic adaptively in the app.
The rule
Partnerships and S corporations are pass-through entities, but their basis mechanics differ in three critical ways. Under IRC §705, a partner's outside basis includes the partner's share of partnership liabilities (both recourse and nonrecourse), while under IRC §1366 and §1367, an S corporation shareholder's stock basis does NOT include any share of corporate-level debt. S corp shareholders may have a separate debt basis only for loans they personally make directly to the corporation. Losses pass through only to the extent of basis (stock basis first, then debt basis for S corps; outside basis for partnerships), and distributions reduce basis but cannot create a loss — excess distributions trigger gain.
Elements breakdown
Partner's Outside Basis Adjustments (IRC §705)
The running tally of a partner's tax investment in the partnership interest, adjusted annually.
- Increase by capital contributions
- Increase by share of taxable income
- Increase by share of tax-exempt income
- Increase by share of partnership liabilities
- Decrease by distributions (cash and property at adjusted basis)
- Decrease by share of losses and nondeductible expenses
- Decrease by share of liability reductions
- Basis cannot drop below zero
S Corp Shareholder Stock Basis Adjustments (IRC §1367)
The shareholder's tax investment in S corp stock, adjusted in a specific ordering each year.
- Increase by capital contributions and stock purchases
- Increase by share of separately stated income and ordinary income
- Increase by share of tax-exempt income
- Decrease by distributions (before losses)
- Decrease by nondeductible expenses
- Decrease by share of losses and deductions
- No adjustment for entity-level debt
S Corp Debt Basis
A separate basis pool created only by direct shareholder loans to the corporation.
- Created only by shareholder's direct loan to S corp
- Guaranteeing third-party debt does NOT create debt basis
- Used after stock basis is exhausted to absorb losses
- Restored by future income before stock basis
- Repayment of reduced-basis debt triggers gain
Loss Limitation Ordering
The hurdles a loss must clear to be deductible by an owner.
- First: basis limitation (§704(d) for partners; §1366(d) for S shareholders)
- Second: at-risk limitation (§465)
- Third: passive activity loss limitation (§469)
- Fourth: excess business loss (§461(l))
- Suspended losses carry forward indefinitely
Distribution Treatment
How cash and property distributions affect basis and gain.
- Partnership cash distribution reduces outside basis; excess is gain
- S corp distribution from AAA is tax-free to extent of stock basis
- S corp distribution exceeding stock basis triggers capital gain
- Distributions never create a deductible loss
- Property distributions: partnership uses carryover basis; S corp triggers gain at entity level
Common patterns and traps
The Phantom Debt Basis Trap
This trap appears whenever an S corporation borrows from a third-party lender and a shareholder either guarantees the loan or co-signs as surety. Candidates assume the guarantee creates debt basis because the shareholder is economically exposed. Under Reg. §1.1366-2(a)(2), only an actual economic outlay — a direct loan from the shareholder — creates debt basis. The guarantee creates basis only if and when the shareholder actually pays on the guarantee.
A wrong choice that adds the shareholder's pro-rata share of an entity bank loan, or the full amount of a personally-guaranteed loan, to stock basis to absorb a pass-through loss.
The Distribution-Before-Loss Ordering Trap
S corp basis adjustments under §1367 follow a strict order: increase for income, decrease for distributions, decrease for nondeductible expenses, then decrease for losses. Partnerships use a similar but distinct order. Candidates often net everything together or apply losses before distributions, which can mistakenly suspend a loss that the correct ordering would allow, or vice versa.
A wrong choice that computes basis by lumping income, distributions, and losses into a single net adjustment, producing a different deductible-loss amount than the correct ordered computation.
The Recourse-vs-Nonrecourse Allocation Trap
Under §752 and the related regulations, recourse partnership liabilities are allocated based on which partner bears the economic risk of loss; nonrecourse liabilities are allocated based on the partners' profit-sharing ratios (with §704(c) tiers). Candidates default to using profit-sharing percentages for everything or capital-account percentages, missing the economic-risk-of-loss test for recourse debt.
A wrong choice that allocates recourse debt by profit ratio instead of by which partner is ultimately liable, particularly common in LLP scenarios with one general partner and several limited partners.
The §1368 AAA-vs-AE&P Distribution Trap
For S corps with accumulated earnings and profits from prior C corp years, distributions follow a layered ordering: AAA (tax-free to basis), then AE&P (taxable dividend), then remaining AAA, then return of basis, then capital gain. Candidates with no prior C history sometimes apply this layering anyway, or candidates with AE&P forget the dividend layer.
A wrong choice that treats the entire S corp distribution as a tax-free return of basis when AE&P exists, or that triggers dividend treatment when the corporation has always been an S corp.
The Excess-Distribution-Triggers-Gain Trap
Both partnerships (§731) and S corps (§1368(b)(2)) treat distributions exceeding basis as capital gain — but candidates often confuse this with a deductible loss or with ordinary income. The gain is capital because it represents disposition of an investment interest, and basis cannot go negative.
A wrong choice that recognizes ordinary income on the excess, or that allows the excess distribution to create a negative basis carrying forward.
How it works
Picture two owners with identical $50,000 cash contributions. Maya is a 50% partner in Reyes Trading LLP, which borrows $200,000 of recourse debt that flows through under §752 — Maya's outside basis becomes $50,000 + $100,000 = $150,000. Devon is a 50% S corp shareholder in Liu Industries Inc., which borrows the same $200,000 from a bank — Devon's stock basis stays at $50,000 because corporate debt never increases shareholder basis under §1367. If each entity passes through a $120,000 loss, Maya deducts her full $60,000 share (basis allows it) while Devon deducts only $50,000 and suspends $10,000 until basis is restored. Now suppose Devon had personally lent $30,000 to Liu Industries — that creates separate debt basis, and Devon could deduct the full $60,000 ($50,000 stock + $10,000 debt). The trap candidates fall into is treating S corp guarantees of corporate bank debt as creating debt basis. They do not. Only a direct loan from shareholder to corporation works (Selfe v. U.S. notwithstanding for narrow circumstances, the modern rule under Reg. §1.1366-2 requires actual economic outlay).
Worked examples
What is the amount of the Year 4 loss that Priya may deduct on her individual return, before applying at-risk and passive activity rules?
- A $32,000, because her share of the loss does not exceed her share of stock basis plus her guaranteed share of corporate debt
- B $25,000, with $7,000 suspended and carried forward indefinitely ✓ Correct
- C $80,000, because S corp losses are fully deductible by shareholders without basis limitation
- D $0, because the loss must first be applied against accumulated adjustments account before any shareholder deduction
Why B is correct: Under IRC §1366(d), an S corporation shareholder's loss deduction is limited to the sum of stock basis and debt basis. Priya's stock basis is $25,000 and her debt basis is $0 — a personal guarantee does not create debt basis under Reg. §1.1366-2(a)(2) without an actual economic outlay. Her share of the loss is $32,000 (40% × $80,000), but only $25,000 is deductible; the remaining $7,000 is suspended and carries forward indefinitely until basis is restored.
Why each wrong choice fails:
- A: This answer treats the personal guarantee on Tamarack's bank loan as creating debt basis. Under Reg. §1.1366-2, a guarantee creates debt basis only when the shareholder actually pays on it; mere willingness to be liable does not satisfy the economic-outlay requirement. (The Phantom Debt Basis Trap)
- C: S corp losses are explicitly subject to the §1366(d) basis limitation. Treating losses as fully deductible without checking basis ignores the first hurdle in the loss-limitation ordering.
- D: AAA is a corporate-level account that affects characterization of distributions under §1368, not a shareholder-level loss limitation. Losses pass through under §1366 regardless of AAA balance.
What is Marco's outside basis at the end of Year 1, and how much of the loss may he deduct (before at-risk and passive rules)?
- A Outside basis $0; deductible loss $40,000
- B Outside basis $130,000; deductible loss $40,000 ✓ Correct
- C Outside basis $130,000; deductible loss $160,000
- D Outside basis $20,000; deductible loss $20,000
Why B is correct: Under IRC §752, Marco's share of recourse debt (25% × $600,000 = $150,000) increases his outside basis. Starting at $40,000, plus $150,000 debt share, minus $20,000 distribution = $170,000 before losses. His 25% share of the loss is $40,000, which is fully deductible because it does not exceed pre-loss basis. Ending basis: $170,000 − $40,000 = $130,000. Per §704(d), losses reduce basis last, after distributions.
Why each wrong choice fails:
- A: This ignores the §752 inclusion of recourse debt in outside basis. Without the $150,000 debt share, Marco appears to run out of basis, but partners — unlike S shareholders — do get basis credit for entity debt they bear economic risk on. (The Phantom Debt Basis Trap)
- C: Marco's share of the loss is only 25% of $160,000, which equals $40,000 — not the full $160,000. Pass-through losses are allocated by partnership percentage, not assumed in full by each partner.
- D: This answer ignores the debt allocation entirely and applies the loss before the distribution, producing the wrong basis ordering. Under §705 and the regulations, distributions reduce basis before losses do. (The Distribution-Before-Loss Ordering Trap)
What are Inez's Year 5 ending stock basis and debt basis, respectively?
- A Stock basis $30,000; debt basis $25,000 ✓ Correct
- B Stock basis $18,000; debt basis $37,000
- C Stock basis $43,000; debt basis $0
- D Stock basis $30,000; debt basis $0
Why A is correct: Under IRC §1367, the $12,000 of ordinary income increases stock basis ($18,000 + $12,000 = $30,000). The $25,000 direct loan from Inez to the corporation creates debt basis of $25,000 under Reg. §1.1366-2 because it represents an actual economic outlay. Income does not flow into debt basis until stock basis has been previously reduced by losses; here there are no losses, so debt basis simply equals the loan principal of $25,000.
Why each wrong choice fails:
- B: This answer adds the $12,000 of income to debt basis instead of stock basis. Income increases stock basis first under §1367; debt basis is restored by income only after stock basis has been previously reduced by losses, which did not happen here. (The Distribution-Before-Loss Ordering Trap)
- C: This treats the $25,000 shareholder loan as a contribution that increases stock basis. Loans documented with a note remain debt and create separate debt basis — they do not become equity unless reclassified, which is not indicated here.
- D: This ignores the direct shareholder loan entirely. A bona fide loan from shareholder to S corp is exactly the fact pattern that creates debt basis under §1366(d)(1)(B); dismissing it leaves Inez with no cushion for future losses. (The Phantom Debt Basis Trap)
Memory aid
PIGS for partnership basis up: Purchases (contributions), Income, Gains, Share-of-debt. SOLD for S corp stock basis down (in order): Stock-basis distributions, Other nondeductibles, Losses, Debt-basis losses last.
Key distinction
Partnership outside basis includes the partner's share of entity debt under §752; S corp stock basis NEVER includes corporate-level debt — only direct shareholder loans create separate debt basis under §1367.
Summary
Partners get basis credit for their share of partnership debt; S shareholders only get debt basis from loans they personally make to the corporation, and losses are limited to the sum of stock and debt basis.
Practice entity taxation: partnerships and s corporations adaptively
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Start your free 7-day trialFrequently asked questions
What is entity taxation: partnerships and s corporations on the CPA Exam?
Partnerships and S corporations are pass-through entities, but their basis mechanics differ in three critical ways. Under IRC §705, a partner's outside basis includes the partner's share of partnership liabilities (both recourse and nonrecourse), while under IRC §1366 and §1367, an S corporation shareholder's stock basis does NOT include any share of corporate-level debt. S corp shareholders may have a separate debt basis only for loans they personally make directly to the corporation. Losses pass through only to the extent of basis (stock basis first, then debt basis for S corps; outside basis for partnerships), and distributions reduce basis but cannot create a loss — excess distributions trigger gain.
How do I practice entity taxation: partnerships and s corporations questions?
The fastest way to improve on entity taxation: partnerships and s corporations is targeted, adaptive practice — working questions that focus on your specific weak spots within this sub-topic, getting immediate feedback, and revisiting items you missed on a spaced-repetition schedule. Neureto's adaptive engine does this automatically across the CPA Exam; start a free 7-day trial to see your sub-topic mastery climb in real time.
What's the most important distinction to remember for entity taxation: partnerships and s corporations?
Partnership outside basis includes the partner's share of entity debt under §752; S corp stock basis NEVER includes corporate-level debt — only direct shareholder loans create separate debt basis under §1367.
Is there a memory aid for entity taxation: partnerships and s corporations questions?
PIGS for partnership basis up: Purchases (contributions), Income, Gains, Share-of-debt. SOLD for S corp stock basis down (in order): Stock-basis distributions, Other nondeductibles, Losses, Debt-basis losses last.
What's a common trap on entity taxation: partnerships and s corporations questions?
Adding entity-level debt to S corp stock basis
What's a common trap on entity taxation: partnerships and s corporations questions?
Forgetting partnership distributions reduce basis before losses
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