The business rules behind SEE Part 2 span several entity forms, and their core difficulty is that one economic event — paying an owner, distributing cash, deducting a loss — changes tax treatment the moment the entity label changes. The most efficient study habit is a two-step drill: first identify which regime and which basis account governs the fact pattern, and only then apply that regime's rules. Every scenario below trains that habit, and the mixed-entity drill near the end tests whether you can switch regimes without blending their rules together.
Why One Fact Pattern Produces Four Different Tax Answers
For business tax purposes the entity label — sole proprietorship, partnership, S corporation, or C corporation — determines which rules, forms, and accounts apply, so identify the regime before calculating anything.
The subject areas this Part 2 covers span business entities and formations, business income and deductions, partnerships and LLCs, corporations and S corporations, specialized returns and tax-exempt entities, and employment taxes and retirement plans. Because the underlying rules are regime-based, routing the facts to the right body of law is itself a skill worth drilling. A $10,000 cash distribution is uneventful for a C corporation shareholder receiving a dividend, potentially tax-free for an S corporation shareholder with sufficient stock basis, and basis-reducing for a partner whose outside basis absorbs it. Train yourself to name the entity, its return form, and its controlling ledger before touching any math.
Formations deserve early attention because classification errors compound later. A single-member LLC is disregarded for federal purposes by default, a multi-member LLC is treated as a partnership unless it elects corporate status, and a corporation is a corporation regardless of its state-law form. Each classification carries its own accounting-period restrictions, owner-compensation mechanics, and deduction limits. When you finish any formations topic, close by asking what would change if the same facts sat inside a different entity — that question is where these topics overlap most visibly.
Guaranteed Payments Are Not Wages: A Partner Salary Scenario
A fixed amount paid to a partner for services is a guaranteed payment: deductible by the partnership, ordinary income to the partner, and generally subject to self-employment tax — not wage withholding.
Worked scenario: Mara owns 40% of a partnership that pays her $48,000 during the year for managing operations and also allocates her a $30,000 distributive share of ordinary income. The natural mistake is to treat the $48,000 like a corporate salary — no self-employment tax, no deduction mechanics to trace. Under partnership rules, that fixed payment for services is a guaranteed payment: the partnership deducts it in computing ordinary income, Mara reports it as ordinary income on her own return, and it is generally included in her self-employment income alongside her distributive share.
The consequences cascade. Characterize the payment as wages and the partnership's ordinary income is overstated, every partner's allocations shift, and Mara's SE tax is understated; characterize it correctly and it neither changes her capital account when paid in cash nor increases her outside basis the way an income allocation would. Contrast this with an S corporation, where the same $48,000 paid to a shareholder for services should be wages subject to employment tax and must be reasonable before any distributions flow. Same cash, same manager, opposite payroll treatment — the clearest demonstration of why regime identification comes before any calculation.
S Corporation Distributions: Order of Operations With Stock Basis
Distributions are tax-free only up to stock basis; set reasonable compensation first, then track stock basis and the accumulated adjustments account before treating any distribution remainder as gain.
Worked scenario: Dana owns 100% of an S corporation with $30,000 of stock basis and takes a $20,000 salary plus $80,000 in distributions. The tempting error is to call the entire $80,000 a tax-free return of basis and skip the compensation question entirely. The better sequence: compensation for a shareholder-employee must be reasonable wages subject to employment taxes before distributions are considered; then the distribution reduces stock basis dollar for dollar. Dana's $80,000 distribution first wipes out her $30,000 of basis; the remaining $50,000 is capital gain, generally long-term.
Three ledgers matter here and they answer different questions. Stock basis — increased by allocated income items and reduced by distributions — gates whether a distribution is taxable and how much loss the shareholder can deduct. Loans the shareholder personally makes to the corporation create debt basis, a separate ledger that supports loss deductions but not tax-free distributions. The accumulated adjustments account (AAA) is a corporation-level record of previously taxed income less distributions, and it generally determines how a distribution is sourced first. Skipping the compensation step invites employment-tax recharacterization of disguised wages; skipping the basis step misstates the gain. Draw all three ledgers as separate columns whenever an S corporation scenario appears.
Partnership Outside Basis: The Ordering Rules Behind Loss Deductions
A partner's outside basis starts with cost plus a share of liabilities, increases with income allocations, and then absorbs distributions and only afterward deductible losses — in that order.
Outside basis is the partner-level gatekeeper for losses, distributions, and later gain, so build it mechanically every time. Start with contributed cash and property plus the partner's share of partnership liabilities, with recourse and nonrecourse liabilities computed differently. Then add allocated income items. A partner who contributes $20,000 cash and is allocated half of $60,000 of recourse debt starts with $50,000 of outside basis before any income or loss — her share of the debt alone exceeds her cash contribution, which surprises people the first time they compute it.
The ordering matters because a loss deduction is limited to basis remaining after distributions reduce it. If that same partner takes a $15,000 cash distribution during the year, her basis for loss purposes falls to $35,000, so a $45,000 allocated loss leaves $10,000 suspended and carried forward rather than deducted and forgotten. Suspended amounts resurface when basis or future income returns, which is why you track each partner's basis annually rather than reconstructing it. This is also where entity-level deduction limits reappear: items such as Section 179 expensing pass through and can be limited again at the partner level.
Owner Compensation Across Four Entities: A Decision Table
Compensation mechanics diverge sharply: Schedule C owners pay SE tax on net earnings, partners use guaranteed payments and shares, S corporation owner-employees need reasonable wages, and C corporation owner-employees are simply employees.
Self-employment tax is the cleanest illustration of why regime identification comes first. A Schedule C sole proprietor pays self-employment tax on net earnings. A general partner's distributive share is generally SE income, while a limited partner's share is treated differently — precisely the kind of distinction worth isolating in your notes rather than blurring. An S corporation splits an owner's economics into wages subject to employment taxes and distributions that are not, which is why reasonable compensation is the compliance pivot. A C corporation owner reaches her earnings only as wages, dividends, or sale proceeds, with the entity-level deduction picture differing for each.
Use the table below as a retrieval drill, not a reference card: cover it, redraw it from memory, and annotate one difference per row. Then connect it to the employment-tax domain, where employers deposit and report federal employment taxes — income tax withheld plus both the employer and employee shares of Social Security and Medicare — through quarterly reporting such as Form 941. The compensation decision you make at the entity level drives the deposits and filings at the employment-tax level, so study the two blocks together rather than as separate silos. Treat the final column as the anchor: each regime has one ledger whose movement answers most owner-payment questions.
| Entity | Return | Owner's earnings mechanism | Tax on owner earnings | Ledger to monitor |
|---|---|---|---|---|
| Sole proprietorship | Schedule C (Form 1040) | Draws from the business; taxed on net profit | Self-employment tax on net earnings | Expense records and asset basis |
| Partnership / multi-member LLC | Form 1065 with K-1s | Guaranteed payments plus distributive shares | Generally SE tax on partner income items | Each partner's outside basis |
| S corporation | Form 1120-S | Reasonable wages plus distributions | Employment tax on wages only | Stock basis, debt basis, AAA |
| C corporation | Form 1120 | Wages; dividends; salary deductible at entity level | Employment tax on wages; dividend taxation | Earnings and profits |
A Mixed-Regime Drill: Five Cards, One Page, No Peeking
Write five fact patterns on cards, one per entity, and for each name the regime, the controlling account, the tax result, and the payroll consequence before checking anything against your notes.
Build five cards from your own notes: (1) a sole proprietor deducts a $25,000 truck purchase — Section 179 eligibility and limits on Schedule C; (2) a partnership pays a junior partner a fixed monthly amount for services; (3) an S corporation with thin stock basis distributes year-end cash; (4) a C corporation pays its sole shareholder both a year-end bonus and a dividend; (5) an employer withholds federal income tax and both shares of Social Security and Medicare from a paycheck. Work all five in one sitting, on paper, before consulting any reference — the value comes from forcing the regime switch itself.
Score each card against five checkpoints: the entity and its return form named correctly; the controlling account or ledger identified (outside basis, stock basis, AAA, earnings and profits); the ordering rule applied before characterizing the payment; the payroll or SE tax consequence stated; and any entity-level deduction limit flagged. Expect your first pass to expose regime-switching slips — importing wage-withholding logic into the partnership card, or forgetting that distributions precede loss deductions in the ordering. Four or five checkpoints met suggests you are ready for mixed timed sets; two or three means rebuild the owner-compensation decision table first. Treat that score as a study milestone, not a prediction of any result.
A Six-Week Sequence and the Readiness Checks That End It
Dedicate one week per regime block, then a final week to mixed timed sets; finish this pass when you can redraw the entity table and compute both basis accounts from blank paper.
A sequence you can compress or stretch to your calendar: Week 1, entity classification, formations, and accounting periods. Week 2, business income and deductions, including entity-level limits and how items pass through. Week 3, partnerships and LLCs through outside basis and the loss-ordering rules. Week 4, S corporations through stock basis, debt basis, and AAA. Week 5, employment taxes, retirement plans, and specialized returns including tax-exempt entities. Week 6, the five-card drill plus mixed sets from practice materials, logging every error by regime rather than by topic so that switching slips become visible as a pattern you can fix.
You are done with this pass when these checks hold: you can redraw the owner-compensation decision table from memory with all four return forms; you can compute outside basis through a mid-year distribution and a loss, and stock basis alongside AAA, without notes; you can explain in two sentences why reasonable compensation matters for an S corporation while a guaranteed payment is not wages; and your error log shows regime-identification mistakes have stopped appearing. For administrative details about the Special Enrollment Examination itself — scheduling, fees, and current policies — IRS.gov is the authoritative source; treat this guide as a study method, not a syllabus.
References and further reading
Use these references to explore the concepts and check the latest information from the relevant organizations.