Transfer Pricing for Small Businesses: How to Invoice Between Your Own Companies Without Breaking the Law

You have a Wyoming LLC that provides marketing services and another that handles IT development. Both serve your operating company. You invoice between them monthly. The question is: how much can you charge?

This is transfer pricing. It is the single most scrutinized area of international tax law. Multinational corporations spend millions on transfer pricing studies. But as a small business with 2-3 entities, you face the same rules with a fraction of the resources. Get it wrong, and you face penalties that can exceed the tax you were trying to save.

The Arm's Length Principle

The core rule of transfer pricing across all jurisdictions (US, EU, Canada, OECD members) is the arm's length principle: transactions between related entities must be priced as if they were between unrelated parties in an open market.

In practice, this means: if you pay your marketing LLC 20% of revenue for marketing services, that price must be what an independent marketing agency would charge for the same services.

Defensible Ratios by Service Type

Based on OECD guidelines, industry benchmarking studies, and IRS audit precedents, here are the defensible ranges for common intercompany service fees:

Service Type	Defensible Range (% of Revenue)	Aggressive Zone	Red Flag Zone
Marketing / Advertising	10-20%	20-30%	Above 30%
IT Development / Maintenance	5-15%	15-25%	Above 25%
Management / Consulting	3-7%	7-12%	Above 12%
Administrative / Back Office	2-5%	5-8%	Above 8%
IP Licensing (trademarks, software)	3-8%	8-15%	Above 15%
Combined (all services)	25-50%	50-65%	Above 65%

"The combined ratio is the key number. If your intercompany service fees total more than 50% of revenue, you are in the aggressive zone. Above 65%, you are almost certainly going to face a challenge if audited. I tell clients to stay at or below 50% combined."

The Documentation You Must Have

Having defensible prices is necessary but not sufficient. You must also maintain documentation that proves the services are real, the prices are justified, and the payments correspond to actual work performed.

Minimum documentation per service agreement

Document	What It Must Contain	When to Prepare
Master Service Agreement (MSA)	Scope of services, pricing methodology, payment terms, governing law, termination clause	Before the first invoice
Monthly invoices	Service description, hours or deliverables, amount, payment date	Monthly
Proof of delivery	Email correspondence, reports, screenshots of work, meeting notes	Ongoing
Benchmarking study	Comparison with 3-5 independent providers' rates for similar services	Annually
Transfer pricing memo	Summary of methodology, rationale for pricing, benchmarking references	Annually

What a benchmarking study looks like

You do not need a Big 4 firm to produce this. For a small business, a simple document showing that your prices are in line with market rates is sufficient:

The Bright Lines: Legal vs Illegal

Practice	Legal?	Notes
Paying your LLC a market-rate fee for real services actually performed	Legal	This is the entire point of transfer pricing
Paying your LLC slightly above market rate (within the aggressive zone)	Legal but risky	Defensible if benchmarking supports it
Paying your LLC for services that were never performed	Illegal	This is fraud, not transfer pricing
Creating an invoice for "management consulting" with no deliverables	Illegal	No substance = sham transaction
Backdating invoices to cover expenses retroactively	Illegal	Document fraud
Using a third entity as a "pass-through" to add an extra layer of fees	Legal but heavily scrutinized	Must have genuine business purpose
Shifting 90% of revenue to a zero-tax entity via intercompany fees	Will be challenged	No court will accept this as arm's length

Common Structures and Their Risk Profiles

Structure 1: Operating Co + 1 Service LLC (Low Risk)

Structure 2: Operating Co + 2 Service LLCs (Medium Risk)

Structure 3: Operating Co + 3 Service LLCs (High Risk)

IRS Section 482: The US Enforcement Mechanism

Under IRS Section 482, the IRS has the authority to reallocate income between related entities if it determines that prices do not reflect arm's length. The burden of proof is on you to demonstrate that your pricing is reasonable.

Penalties for non-compliance:

Violation	Penalty
Transfer pricing adjustment (net adjustment > lesser of $5M or 10% of gross receipts)	20% penalty on the underpayment
Gross valuation misstatement (price > 400% or < 25% of correct price)	40% penalty on the underpayment
Failure to maintain contemporaneous documentation	Loss of penalty protection (cannot argue reasonable cause)

Practical Recommendations

1. Stay at or below 50% combined intercompany fees as a percentage of revenue. This is your safe harbor.
2. Each service must be genuinely distinct. If you cannot clearly explain what Marketing LLC does that IT LLC does not, you have a problem.
3. Document everything, every month. Monthly invoices with line-item descriptions. Keep emails, reports, and deliverables.
4. Prepare a benchmarking study annually. It takes 2 hours and costs nothing. It can save you $25,000+ in penalties.
5. Use cost-plus pricing for services without a clear market rate. Cost of labor + 15-25% markup = defensible.
6. Engage a CPA who understands international transfer pricing. Not a generalist. A CPA with Section 482 experience.