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Tax Strategy
A practical framework for corporate tax planning, compliance, and optimization. Tax is one of the largest and most controllable operating expenses for a growing company - yet most founders and operators treat it reactively, filing returns after the year closes and leaving significant credits and deductions unclaimed. This skill covers the full tax lifecycle: entity structuring, R&D credit identification, sales tax and VAT nexus management, transfer pricing for international operations, quarterly estimated tax management, and audit preparation.
Disclaimer: This skill provides general educational information about tax
concepts and common strategies. It is NOT legal or tax advice. Tax law is
jurisdiction-specific, changes frequently, and depends on facts unique to each
business. Always consult a qualified tax attorney or CPA before making tax
decisions. Nothing in this skill should be relied upon as legal, accounting, or
tax advice.
When to use this skill
Trigger this skill when the user:
- Asks about R&D tax credits, Section 41 credits, or qualifying R&D activities
- Needs to determine sales tax or VAT nexus for a new state or country
- Is structuring a subsidiary, IP holding entity, or international expansion
- Asks about transfer pricing policies between related entities
- Needs to prepare for a tax audit or respond to a tax authority inquiry
- Wants to optimize quarterly estimated tax payments to avoid underpayment penalties
- Asks about corporate income tax rates, deductions, or timing strategies
- Is evaluating entity type (C-Corp, S-Corp, LLC, pass-through) for tax impact
Do NOT trigger this skill for:
- Personal income tax filing or individual tax returns - use a personal finance skill
- GAAP revenue recognition or financial statement accounting - use an accounting skill
Key principles
- Plan proactively, not reactively - Tax strategy executed before a
transaction or year-end is worth 10x more than cleanup after the fact. Entity elections, R&D credit documentation, and transfer pricing policies must be in place before the relevant period ends - they cannot be backdated.
- Document everything - The IRS and most tax authorities shift the burden
of proof to the taxpayer. No documentation means no deduction or credit. R&D activities, business purpose for expenses, and intercompany agreements must be contemporaneously recorded, not reconstructed during an audit.
- R&D credits are systematically underutilized - Fewer than 30% of
eligible companies claim the federal R&D credit. Most qualifying activities are ordinary engineering work - debugging, prototyping, iterating on algorithms, designing new features - not just lab research. The credit can offset payroll taxes for early-stage companies.
- Nexus determines obligation - You owe sales tax or VAT only where you
have nexus (a sufficient connection to that jurisdiction). Physical presence used to be the only trigger; economic nexus rules (typically $100K in sales or 200 transactions per state) now apply in every US state. Map your nexus before collection obligations snowball into back-tax liability.
- Transfer pricing must be arm's length - When related entities transact
(parent charges subsidiary for IP, services, or goods), the price must be what unrelated parties would agree to. Failure to document arm's-length pricing is one of the most common triggers for international tax audits and can result in double taxation.
Core concepts
Corporate income tax is levied on a corporation's net taxable income. The US federal corporate rate is 21% (post-2017 Tax Cuts and Jobs Act). State rates vary from 0% (Wyoming, South Dakota) to over 11% (New Jersey). Taxable income differs from book income due to depreciation methods, timing of deduction recognition, and credits that directly reduce tax liability (not just taxable income).
Nexus and permanent establishment (PE) are the thresholds that create a tax collection or income tax obligation. For US sales tax: physical nexus (office, employee, warehouse) or economic nexus (revenue or transaction thresholds). For international income tax: a permanent establishment typically arises when a company has a fixed place of business or a dependent agent in a foreign country - triggering that country's corporate income tax.
R&D credit qualification under IRC Section 41 requires four-part test: (1) qualified purpose - developing a new or improved business component; (2) technological in nature - relies on hard sciences, engineering, or computer science; (3) elimination of uncertainty - attempts to eliminate technical uncertainty; (4) process of experimentation - evaluates alternatives through modeling, simulation, testing, or trial and error. Qualifying expenditures include wages, contract research (65% of amounts paid to US contractors), and supplies consumed in research.
Transfer pricing methods are the IRS/OECD-approved approaches for pricing intercompany transactions: Comparable Uncontrolled Price (CUP) - compare to identical third-party transactions; Cost Plus - cost of production plus arm's length markup; Resale Price - resale price minus appropriate gross margin; Comparable Profits Method (CPM) / Transactional Net Margin Method (TNMM) - compare operating margin to comparable companies; Profit Split - allocate combined profit based on relative contribution. Most mid-market companies use CPM/TNMM because comparable third-party transactions are hard to find.
Common tasks
Identify R&D credit opportunities
Qualification criteria checklist:
| Test | Question to ask | Examples that qualify | |---|---|---| | Qualified purpose | Are you developing or improving a product, process, software, or formula? | New feature, performance optimization, new algorithm | | Technological in nature | Does the work rely on engineering, computer science, or physical sciences? | Backend architecture, ML model design, circuit design | | Elimination of uncertainty | Is there technical uncertainty about how to achieve the result? | "We don't know if this approach will scale to 10M requests" | | Process of experimentation | Are you testing alternatives, iterating, or running experiments? | A/B testing architecture choices, profiling and tuning |
Qualifying expenditures:
- Wages - W-2 wages for employees whose time is spent on qualified research. Track time by project. Even partial time qualifies (e.g., 40% of a developer's time on a qualifying project = 40% of their wages).
- Contract research - 65% of amounts paid to US-based third-party contractors performing qualified research on your behalf.
- Supplies - Materials and supplies consumed in the research process (not capital equipment, which is depreciated separately).
Startup benefit: Companies with less than $5M in gross receipts and fewer than 5 years of revenue can apply up to $500K/year of R&D credits against employer payroll taxes (FICA) - even with no income tax liability. This is often the most valuable tax benefit available to early-stage tech companies.
Documentation to maintain contemporaneously:
- Project descriptions explaining the technical uncertainty and experimentation
- Time logs or percentage estimates tied to individual employees and projects
- Payroll records cross-referenced to project time
- Meeting notes, design docs, code commits, and test records as evidence of experimentation
Load references/r-and-d-credits.md for full qualification examples, the
four-part test applied to common software development activities, and credit
calculation walkthrough.
Plan for sales tax and VAT compliance
US sales tax nexus checklist:
Physical nexus triggers (any one creates nexus):
- [ ] Office, store, or warehouse in the state