US entity formation and baseline compliance

If you form a corporation or LLC in Delaware, you inherit filing and payment deadlines that exist even if the company is pre-revenue and “inactive.” For Delaware corporations, annual report and franchise tax are due by March 1; late filings trigger a stated $200 penalty plus monthly interest (Delaware also describes interest of 1.5% per month).  A Delaware LLC has a different calendar: the annual tax is due by June 1, and Delaware similarly states a $200 penalty plus 1.5% monthly interest for late payment. 

This is where a US CPA (often coordinated with US counsel) adds early leverage: entity classification implications, federal/state tax IDs, the compliance calendar, and “who files what” clarity before investor diligence. For example, the Internal Revenue Service (IRS) sets corporate return due dates and extension mechanics (e.g., Form 1120 due generally the 15th day of the 4th month after year-end; Form 7004 provides an automatic extension to file). 

A common Israeli-founder surprise is that non-US applicants typically cannot use the IRS online EIN application if they have no legal residence, principal place of business, or principal office in the US; the IRS directs international applicants to use phone/fax/mail routes. 

Foreign ownership and related-party reporting

If your US entity is 25% foreign-owned (directly or indirectly) and has reportable transactions with foreign related parties, you may have Form 5472 obligations. IRS Form 5472 instructions explicitly include foreign-owned US disregarded entities in the definition of a “reporting corporation” for this reporting regime and require Form 5472 to be filed with the income tax return (or, for a foreign-owned US disregarded entity, with a pro forma Form 1120 cover and Form 5472 attached). 

The compliance downside is asymmetric: the IRS states a $25,000 penalty for failure to file Form 5472 when due and in the prescribed manner (and for failure to maintain records), with additional penalties if the failure continues after IRS notice. 

US revenue and state tax nexus, including sales tax

Post‑Wayfair, the Supreme Court upheld the ability of states to impose sales tax collection duties based on economic presence rather than physical presence.  In practice, economic nexus thresholds vary by state, but a frequently used model is a sales or transaction threshold; a state-by-state chart notes that, as of January 1, 2026, every state with a sales tax has some form of economic nexus requirement for remote sellers. 

For Israeli SaaS and B2B companies, the US CPA question typically appears at one of three inflection points:

• customers start asking for US tax documentation and withholding forms (e.g., W‑8BEN‑E for foreign entities), 
• revenue concentration grows in multiple states (raising nexus monitoring and registration complexity), 
• enterprise contracts introduce “tax gross-up,” sales tax collection clauses, or “marketplace facilitator” logic that finance must operationalize.

US employees, contractors, and payroll withholding

Hiring in the US creates recurring filing duties. The IRS publishes quarterly employment tax return deadlines (e.g., Form 941 generally due April 30, July 31, Oct. 31, and Jan. 31 for calendar quarters, with a limited additional filing window if deposits were timely).  The IRS also emphasizes deposit schedules (monthly vs semi-weekly) and the requirement to deposit withheld federal income tax and FICA amounts. 

Year-end reporting is not optional: the IRS states employers must furnish and file Forms W‑2 by January 31.  For contractors, the IRS states Form 1099‑NEC must be filed with the IRS and furnished to recipients by January 31. 

A US CPA becomes necessary once this stops being “one contractor via Deel/Rippling” and becomes a multi-person footprint with equity, benefits, multi-state residence, or changing worker classification risk.

Equity compensation and 409A valuation readiness

If you grant options to US taxpayers, you are effectively operating in the IRS Section 409A risk zone. IRS guidance explains that failures can trigger income inclusion, interest, and an additional 20% tax on the affected deferred compensation. 

Market practice is to obtain an independent 409A valuation (or a valuation process designed to support “safe harbor” defensibility) before option grants to US recipients; major cap-table/equity platforms describe 409A valuations as independent appraisals of common stock fair market value used to set option strike prices. 

Transfer pricing, IP structuring, and intercompany transactions

Once you have a US and Israeli entity in the same group, you have related-party transactions: R&D services, cost-sharing, IP licensing, management fees, intercompany loans, and recharge allocations. On the US side, the IRS describes transfer pricing as governed by Section 482 authority to adjust income/deductions among commonly controlled taxpayers to prevent tax evasion and clearly reflect income; IRS materials and regulations frame this through the arm’s-length standard. 

On the Israeli side, transfer pricing reporting is not theoretical: the Israel Tax Authority provides an English service page stating that Form 1385 (declaration of international transactions) should be completed and submitted as an appendix to the annual report.  The OECD’s Israel transfer pricing country profile describes required disclosure forms for international transactions under Section 85A of Israel’s Income Tax Ordinance and indicates documentation (market conditions study) may be requested by the assessing officer with a short submission window. 

Dual reporting and capital markets expectations

Dual reporting becomes relevant when you have US stakeholders who think in US GAAP and US audit readiness, while your Israeli finance stack may be IFRS-oriented. This split matters most in three situations:

• US institutional investors requiring US GAAP-style reporting packages,
• external audits (for debt, major customers, or exit readiness),
• IPO pathways.

For public filings, the U.S. Securities and Exchange Commission has adopted rules accepting IFRS financial statements from foreign private issuers without US GAAP reconciliation, if prepared in accordance with IFRS as issued by the IASB. 

If you go down a US domestic issuer path (e.g., a Delaware parent that will file as a US registrant), you should assume a US GAAP and PCAOB-audit trajectory. The Public Company Accounting Oversight Board states it sets and maintains auditing standards for audits of public companies and other issuers, and its rules require registered firms to comply with applicable auditing and related professional practice standards. 

What a US CPA provides

A US CPA engagement is most effective when it is framed as (a) a compliance baseline plus (b) decision support as the business scales. In practical terms, the deliverables cluster into four buckets.

Compliance filings and calendar ownership. This includes federal corporate return timing (Form 1120 due generally the 15th day of the 4th month after year-end) and extension mechanics (Form 7004), plus payroll and information returns. 

Cross-border reporting and documentation. This includes Form 5472 related-party reporting and supporting recordkeeping (with explicit IRS penalties for failures), as well as facilitation of treaty/withholding documentation flows (e.g., W‑8BEN‑E usage by foreign entities). 

Operational tax processes. This includes sales tax nexus monitoring in a post‑Wayfair environment and implementing a repeatable workflow across states. 

Investor- and exit-facing finance readiness. VC diligence commonly requests tax filings and financial documentation; legal and VC-facing resources explicitly emphasize tax returns and organization as core diligence items.