Answer
Should consultants charge sales tax on their services?
Short answer
In most states, pure professional consulting services (strategy, analysis, management advice, financial consulting) are not subject to sales tax, which historically applies to tangible goods. However, roughly a dozen states tax some services, and the categories vary widely. Texas taxes data processing and information services. Hawaii taxes virtually all services. If your consulting involves creating software, IT support, staffing, or digital deliverables, more states may assert taxability. Check your specific state's rules and the nature of your services.
Sales tax on consulting services — state snapshot
TX
Professional services generally exempt
ExemptCA
Consulting services generally exempt
ExemptNY
Most consulting exempt; some IT services taxed
PartialFL
Consulting exempt; some IT and data services taxed
PartialWA
Business and occupation tax applies (not sales tax on services)
PartialOH
Information services and some IT consulting taxed
TaxedHI
Nearly all services subject to general excise tax
TaxedNM
Most services taxable under gross receipts tax
TaxedSD
Services generally taxable
TaxedState rules change. Some states tax digital services differently from in-person consulting. Verify current rules with your CPA or your state revenue department.
The general rule: sales tax originated as a levy on tangible personal property. Services were historically exempt in most states. The majority of US states follow this default, and pure professional services (management consulting, financial advisory, legal, marketing strategy) remain exempt in most of them. States with no sales tax at all include Delaware, Montana, New Hampshire, Oregon, and Alaska.
States that tax certain services: Texas taxes 'data processing' and 'information services,' which can capture analytics consulting and certain digital deliverables. Hawaii taxes essentially all services under its gross excise tax. South Dakota taxes most services. New Mexico taxes most services under its gross receipts tax (technically not a sales tax but functionally similar). Washington taxes some services. The categories are highly specific to each state's statutes.
Where consulting gets complicated: if your engagement produces a software deliverable (custom code, a configured SaaS tool, a web application), some states tax the software component separately from the service. IT services and managed services are taxable in New York, Texas, and Ohio under certain conditions. Staff augmentation or body-shop consulting (providing personnel) may be taxable as a 'staffing service' in some states. The key is the nature of what you're delivering, not just the label 'consulting.'
Economic nexus for sales tax: since the Supreme Court's 2018 South Dakota v. Wayfair decision, states can assert sales tax nexus on sellers who exceed $100,000 in sales or 200 transactions in the state, without physical presence. If you have consulting income in a state that taxes your services, you may need to register as a vendor and collect sales tax even if you work remotely.
Practical approach: research your state's Department of Revenue guidance on 'professional services' or 'consulting services.' Many states publish advisory opinions or rulings on specific service categories. If you operate in multiple states with significant revenue from each, a one-time sales tax nexus study from a state and local tax (SALT) professional can identify your exposure. For most pure management or strategy consultants in standard markets, the answer is no sales tax obligation.
Sales tax compliance checklist for consultants
Most consultants owe no sales tax. Know which bucket you are in.
Determine if your service category is taxable in your state
Check where your clients are located — nexus for sales tax follows delivery of service
Review your contracts: is the engagement for services, software, or a deliverable?
Software or SaaS products you deliver may trigger different rules than pure consulting
If taxable, register for a sales tax permit before charging clients
If exempt, consider getting a determination letter from your state for your records
Review annually — states frequently expand taxability of digital and professional services
If your engagement includes software you built, licensed, or hosted — even as part of a broader consulting project — sales tax rules may apply to that portion regardless of state exemptions for pure services.
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