Key takeaway: A subsidiary describes an ownership relationship. LLC and corporation describe legal forms; disregarded entity, partnership, C corporation and S corporation describe federal tax treatment. Decide each question, document funding and charges, and reconcile the related entities before preparing the appropriate financial statements and tax filings.
This article is part of our guide to business entity formation and structure in Florida.
A new business line, investor or acquisition can make a separate entity useful. Before creating one, compare the expected benefit with the cost of administration, agreements, accounting and tax reporting. A subsidiary is controlled by another entity; two companies owned directly by the same individual are generally sister companies, not automatically parent and subsidiary.
Choose ownership, legal form and tax classification separately
Draw the ownership chart from the ultimate owners down to every entity. Record voting rights, economic interests, jurisdictions, legal forms, current federal classifications and proposed elections. Include planned investors and transfers. A structure that works today can become ineligible for a tax election after a change in ownership.
For a domestic LLC, the usual federal income-tax default is disregarded status with one owner and partnership status with two or more owners, unless corporate treatment is elected. A corporation may be taxed as a C corporation or, if eligible and properly elected, an S corporation. These tax classifications do not replace the state-law entity. See IRS Publication 3402.
| Arrangement | Income-tax treatment to evaluate | Operational records |
|---|---|---|
| Parent owns a single-member LLC that remains disregarded | Activity generally belongs on the parent’s income-tax return; parent-to-LLC transactions are generally ignored for that tax purpose. | Track the LLC’s assets, obligations, contracts, cash and operations distinctly. |
| Entity owns an interest in an LLC taxed as a partnership | Partnership return and owner reporting; a partnership interest is not automatically a consolidated corporate-return relationship. | Capital, distributions, allocations and related-party balances need support. |
| Parent owns a separately taxed corporate subsidiary | Separate corporate returns unless an eligible group properly uses consolidated-return treatment or another applicable election. | Entity ledgers plus any required financial consolidation and tax adjustments. |
| S corporation owns an eligible QSub | A valid QSub election generally treats the subsidiary’s items as the parent’s for federal income tax. | Legal and operational records continue; review separate employment, excise and state obligations. |
Answer the S corporation ownership question before funding
The IRS S corporation eligibility rules generally exclude partnerships, corporations and nonresident alien shareholders. Eligible shareholders include individuals and certain trusts and estates, subject to the remaining requirements.
A disregarded single-member LLC may be the shareholder of record when its owner is an eligible shareholder. The Form 1120-S instructions, Schedule K-1 items E and F, distinguish that LLC from its beneficial owner. An LLC taxed as a partnership or corporation generally cannot solve an ineligible-owner problem merely by using the LLC legal form. Check the ultimate owner’s eligibility before moving S corporation shares.
A separate rule allows an S corporation parent to elect qualified subchapter S subsidiary, or QSub, treatment for an eligible domestic corporation whose stock it owns 100%. The Form 8869 instructions describe the election and deemed liquidation. Following a valid election, the subsidiary’s assets, liabilities and income-tax items generally are treated as the parent’s. This is not ordinary ownership of a second separately taxed S corporation, and it is not automatic merely because ownership is 100%.
Document what each company will own, do and owe
Before funds move, identify the employer, contracting entity, service provider, borrower and owner of each significant asset. Have counsel review formation, ownership rights, contracts, guarantees and regulatory requirements. Keeping separate records supports administration; it does not guarantee that every liability stays with one entity.
For each intercompany arrangement, document the parties, business purpose, effective date, approval, pricing method, payment terms and supporting records. Distinguish capital contributions, loans, repayments, distributions, reimbursements and service fees. A cash transfer is not revenue solely because it arrives in a company bank account.
A loan requires analysis of the actual debt terms and substance, including repayment expectations and interest. A service charge requires evidence of services and the recipient’s benefit. Asset and intellectual-property transfers raise their own valuation, basis and tax questions. An agreement and a bookkeeping label alone do not establish the tax result.
See “Management Companies: Allocating Shared Costs Across Related Businesses” for more on Management Companies.
Record both entities and reconcile the amount owed
Use identifiable intercompany accounts or counterparty dimensions so each balance can be traced to the other entity. For example, Microsoft’s Dynamics 365 setup guidance uses due-to and due-from accounts and counterparty information to support reconciliation. Other systems may implement the same tracking objective differently.
The following illustrations assume separate entity ledgers, U.S. dollars, accrual accounting and no taxes, fees or currency differences. They illustrate bookkeeping, not whether the arrangement qualifies as debt or a deductible service for tax.
| Event | Parent’s entry | Subsidiary’s entry |
|---|---|---|
| Parent lends subsidiary $20,000 | Debit intercompany loan receivable $20,000; credit cash $20,000. | Debit cash $20,000; credit intercompany loan payable $20,000. |
| Parent bills $3,000 for qualifying administrative services consumed this month | Debit intercompany receivable $3,000; credit service revenue $3,000. | Debit administrative expense $3,000; credit intercompany payable $3,000. |
| Subsidiary pays that $3,000 bill | Debit cash $3,000; credit intercompany receivable $3,000. | Debit intercompany payable $3,000; credit cash $3,000. |
Payment clears the service receivable and payable; it does not create a second $3,000 of revenue or expense. The $20,000 loan remains outstanding until separately repaid or otherwise resolved. Transfers between the two companies also do not increase the group’s total cash.
Reciprocal receivables and payables should reconcile, but every account need not mirror the other company’s classification. An intercompany sale may be revenue to the seller and inventory to the buyer until resale. Currency translation, cutoffs, capitalization and accounting policies can require reconciliation adjustments. Resolve differences with documents and an agreed explanation; do not post an unsupported balancing entry.
At each close, compare balances by counterparty, invoice, currency and period. Identify missing invoices, transfers in transit, disputed charges and aged loans. Record approved corrections in the proper entity and period, then retain the reconciliation and settlement evidence.
Separate financial consolidation from tax consolidation
For U.S. GAAP financial statements, evaluate the controlling-financial-interest requirements of Topic 810, including the applicable voting-interest or variable-interest model and exceptions. The FASB staff’s January 2026 overview of existing consolidation guidance explains these models and the elimination of internal balances and transactions. It is a discussion handout, not a new accounting standard.
Where financial consolidation applies, eliminate appropriate intercompany balances, revenue and expense in the consolidation records. Preserve the underlying entity ledgers. Also address internal profit remaining in assets: if inventory costing the group $6,000 is sold internally for $10,000 and remains unsold to outsiders, the $4,000 internal profit does not belong in consolidated inventory. This illustration assumes no impairment or other adjustment.
A consolidated federal income-tax return follows different rules. Section 1504 generally requires an eligible corporate ownership chain meeting at least 80% voting-power and value tests, and excludes S corporations and foreign corporations, among others. Section 1501 addresses the group’s consolidated-return choice and consent to the regulations. Financial consolidation does not itself establish that eligibility or make the tax election.
Likewise, reporting a disregarded LLC’s activity through its owner is not the same as electing a consolidated corporate return. Internal transactions may be ignored for federal income tax while remaining relevant to legal records, management reporting, employment taxes or state requirements.
Coordinate related-party pricing and foreign-owner reporting
For transactions subject to section 482, use an appropriate method to support an arm’s-length result under Treasury Regulation 1.482-1. The analysis can apply to domestic as well as cross-border controlled transactions. Document the functions, assets, risks and comparable facts relevant to the transaction. A convenient percentage allocation or invoice is not, by itself, evidence of arm’s-length pricing.
Form 5472: apply the current instructions in order: reporting-corporation status, related party, reportable transactions and exceptions. A 25%-foreign-owned U.S. corporation is within the reporting-corporation definition, but ownership alone does not establish a filing requirement when an exception applies, including no reportable transactions. Ownership attribution rules matter.
A U.S. disregarded entity wholly owned by a foreign person has special section 6038A reporting rules. When required, it files Form 5472 attached to a pro forma Form 1120, even without a separate income-tax return obligation. Reportable activity can include formation funding, contributions and distributions; no sales or profit does not necessarily mean no filing. Other exceptions and filing procedures differ for these entities. Use the instructions for the correct related-party forms, due dates and filing method rather than assuming every subsidiary follows the same rule.
Related reading: “Adding a Partner or Owner: Accounting and Tax Checklist” covers Adding a Business Owner in more detail.
Set one coordinated calendar with clear responsibilities
List each entity’s federal and state income-tax treatment, information returns, employer accounts, sales and use taxes, registrations and annual reports. Identify where employees work, property is located and services are performed. A Florida formation does not settle another state’s filing requirements, and federal disregarded status does not remove every state or payroll obligation.
Assign responsibility for agreements, approvals, entries, reconciliations, financial reporting, elections and tax filings. Monthly reconciliation and periodic tax projections can be useful management practices; actual statutory and contractual deadlines control. Escalate new owners, foreign transactions, employee moves, large transfers and changes in loan terms before year-end.
For a subsidiary tax-planning discussion, bring the ownership chart, governing documents, prior returns, current financial statements, payroll details and proposed intercompany agreements. Confirm deliverables and fees in writing, including whether legal work, transaction analysis, recurring accounting and each tax return are covered.
Frequently asked questions
Can an LLC own an S corporation?
A disregarded single-member LLC may hold the shares if its owner is an eligible S corporation shareholder. An LLC taxed as a partnership or corporation generally is not an eligible shareholder. Separately, an S corporation parent can elect QSub treatment for an eligible domestic corporate subsidiary it owns entirely.
Does every subsidiary file a separate federal income-tax return?
No. Treatment depends on classification and elections. A disregarded subsidiary generally reports through its owner for income tax; an eligible corporate group may file a consolidated return. Separate employment, excise, state and information-reporting obligations may still apply.
Must both sides of every intercompany transaction have identical expense accounts?
No. Reciprocal amounts owed should reconcile, but one entity may record revenue while the other records inventory, another asset or an expense. Explain timing, currency and accounting-policy differences instead of forcing unrelated accounts to match.
Does 25% foreign ownership automatically require Form 5472 every year?
No. Apply the reporting-corporation definition, reportable-transaction test and filing exceptions. A wholly foreign-owned U.S. disregarded entity has special rules, including a pro forma Form 1120 with Form 5472 when required; formation funding and distributions can be reportable.
Is forming a subsidiary a guarantee of liability protection or tax savings?
No. Legal protections depend on applicable law and the facts, including guarantees, contracts, capitalization and conduct. Tax results depend on classification, ownership and transactions. Separate records support administration but do not guarantee either outcome.