The Ultimate Guide to Multistate Taxation in California — What Are the Risks Associated With Multistate Commerce?

Free Tax Guide

What Are the Risks Associated With Multistate Commerce?

Sam Brotman Sam Brotman, J.D.|Last updated May 2026

Quick Answer

Multistate commerce creates four categories of tax risk: (1) sales / use tax exposure in customer states; (2) income tax on apportioned income; (3) payroll tax on employees working in other states; and (4) franchise / minimum taxes for doing-business states. The short version is that every interstate transaction potentially creates compliance obligations. In our experience, the biggest surprise for growing businesses is the minimum franchise tax (CA $800) applying in every year the business has nexus, regardless of income.1

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Four multistate commerce risk categories.

The Four Multistate Commerce Risks

Sales/UseCustomer States
IncomeApportioned
PayrollEmployee States
FranchiseMinimum Tax
MS commerce risks.
RiskExposure2
Sales / Use TaxCustomer state tax
Income TaxApportioned income
Payroll TaxEmployee state tax
Franchise / Min$800 CA / varies

Quick Reference

Jump to: sales, income, payroll, or franchise.

1. Sales / Use Tax Exposure

Customer state sales tax when nexus present.

If this is you: Selling across states. Sales tax where nexus. Marketplace facilitators may handle. Direct sales your obligation where applicable.

Sales Tax Strategy

  1. Track sales by state.
  2. Monitor thresholds.
  3. Register at nexus.
  4. Collect and remit timely.
  5. Audit-defend where needed.

2. Income Tax on Apportioned Income

Multi-state income apportioned and taxed.

If this is you: Business earning income across states. Apportionment allocates to each nexus state. Various state formulas apply. PL 86-272 may protect.

3. Payroll Tax on Out-of-State Employees

Payroll obligations in employee work states.

If this is you: Remote employees or traveling workers. Each employee work state has payroll obligations. Withholding, SUI, WC.

4. Franchise / Minimum Taxes

$800 minimum franchise tax CA; varies other states.

If this is you: Doing-business in state. Minimum franchise / privilege / entity tax. Due regardless of income. CA $800 annual.

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Commerce Risk Lookup

Commerce risk docs.
Tax TypeForm / Authority
Sales / UseState sales tax permit / return
IncomeState corporation / LLC return
PayrollState withholding / UI
FranchiseEntity-level tax return
CA $800 minForm 100 / 568

Commerce Risk Statute

  • 3-4 year state statute.
  • Unfiled: unlimited.
  • Pre-trigger VDA limits look-back.

Commerce Risk Patterns

Commerce risk outcomes. Source: Brotman Law practice.
SituationOutcome
Proactive complianceClean operations
Nexus unrecognizedMulti-tax exposure
Marketplace facilitator coveragePartial relief
VDA resolutionLimited look-back

Commerce Risk Escalation

State Inquiry

Nexus questionnaire.

Audit

Multi-year and multi-tax.

Resolution

Assessment or settlement.

First 48 Hours

  1. Inventory commerce activities by state.
  2. Evaluate tax-type risks.
  3. Calculate exposure.
  4. Plan compliance.
  5. Engage counsel.
Brotman Law handles multistate commerce risk. Based in San Diego.

The ROI Question

Multi-tax exposure can reach six figures quickly. Proactive compliance prevents catastrophic outcomes.

Dealing with Multistate Tax Exposure?

Multistate obligations don’t announce themselves — most businesses accumulate sales tax, income tax, or payroll tax exposure in other states without realizing it until they’re contacted or audited. If you’re selling across state lines, have remote employees, or aren’t sure where your business has nexus, a brief review can identify where you have exposure and what to do about it.

Review My Multistate Exposure →    Or call: (619) 378-3138

When to Engage

  • Growing multistate business.
  • Multi-tax type exposure.
  • State audit.
  • VDA consideration.

Commerce risk question?

15-min consultation free.

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Frequently Asked Questions

What are multistate commerce risks?

Four categories — sales / use tax, income tax, payroll tax, franchise / minimum tax. Each state imposes its own. Nexus drives exposure.

What's the biggest risk?

Depends on business. E-commerce: sales tax. Service providers: income tax. Multi-state employer: payroll. Franchise tax universal where doing business.

Does CA $800 apply everywhere?

CA $800 minimum franchise tax applies in CA. Other states have own minimums. TX franchise tax, DE franchise tax, etc. Varies.

How do I minimize risk?

Proactive nexus analysis, registration where required, professional compliance, VDA for prior gaps.

Does PL 86-272 help?

Protects income tax only for TPP sellers with solicitation-only activity. Doesn't protect sales tax, payroll, franchise.

What's the cost of compliance?

Varies. Software ($500-$5K annual), multi-state payroll ($100-$500/month), CPA / attorney services variable. Always less than audit exposure.

Are some states easier?

Some states (SD, TX, FL, WA) no income tax. Sales tax universal with few exceptions. Analyze state-by-state.

How do I track obligations?

Avalara, TaxJar, Vertex for sales tax. Multi-state payroll providers. Professional services for income / franchise.

What if I missed registration?

Pre-contact VDA. Limited look-back. Penalty abatement. Preferred over waiting for discovery.

Does marketplace help?

Marketplace facilitator laws cover sales tax for marketplace transactions. Direct channel sales still your obligation.

What about remote workers?

Payroll obligations in employee state. Often also income tax nexus. Plan before hiring.

How often do states audit?

Depends on size / risk profile. Random plus targeted. Multi-year audits common. Attorney representation valuable.

Can I operate without full compliance?

Not sustainably. Enforcement increasingly automated. Cost of non-compliance far exceeds compliance cost.

Next Steps

Commerce risk question? 15-min consultation free.