A New York real estate investor can buy contractor materials in New Jersey, furniture from a Massachusetts vendor, and a SaaS subscription from a Texas provider, then discover that none of the invoices includes New York tax. The purchases still follow the buyer home. If the items are taxable and used in New York, the missing checkout charge may become a use tax liability.
That's why the sales tax vs use tax question is no longer a basic shopper issue. For investors, family offices, and closely held businesses, it's a transaction-data problem involving remote vendors, software subscriptions, property improvements, corporate cards, reimbursements, and purchases spread across jurisdictions. States are also changing local rates and tax bases quickly, which makes manual review increasingly unreliable. Recent 2025 sales tax data records 681 total sales tax rate changes and new rates, along with more than 12,414 new and updated sales and use tax jurisdictions tracked during the year.
The practical rule is simple: sales tax is usually visible at checkout, while use tax is often invisible until your accounting team identifies it. The sections below focus on the decisions that matter, including nexus, self-reporting, SaaS, real estate spending, local-rate volatility, and audit preparation.
Why the Sales Tax vs Use Tax Question Matters Now
Sales tax and use tax work as complementary parts of the same consumption-tax system. California's rate history shows a combined sales and use tax structure dating back to July 1, 1943, when the combined rate was 2.50%. The statewide rate reached 7.25% on January 1, 2017, where it remains today, according to the Texas Comptroller's sales and use tax overview, which also explains the complementary relationship between the two taxes.
Texas followed a comparable long-run path. Its state sales and use tax rate increased from 2.0% in 1961 to 6.25% on July 1, 1990, and has remained at that level through the present, as documented by the same Texas tax authority resource. The point isn't the historical rate itself. The point is that states have long treated sales tax and use tax as matched mechanisms, not unrelated charges.
The liability follows the transaction
A seller with the required connection to the destination state generally collects tax from the buyer and remits it. If the seller doesn't collect, the buyer may need to determine whether the purchase is taxable, identify where the item or service is used, and accrue the corresponding use tax.
That distinction matters for a New York investor managing several properties. A contractor's materials might ship from New Jersey to a New York job site. Furniture might come from Massachusetts. A software provider might bill from Texas while employees use the platform in New York and other states. The vendor's billing location doesn't decide the buyer's obligation. The use location and applicable state rules do.
Remote commerce creates more review points
Economic nexus rules encourage many remote sellers to register and collect, while marketplace facilitator rules shift collection responsibilities to platforms such as Amazon, Etsy, and Walmart Marketplace. Those developments reduce some exposure, but they don't eliminate it. Direct purchases, vendor invoices, corporate-card charges, subscriptions, and reimbursements still require review.
Practical rule: Don't ask only whether a vendor charged tax. Ask whether the purchase was taxable where your business, property, employee, or family member used it.
Iowa's fiscal year 2024 annual report illustrates how material the combined system can become. The state reported $4.08 billion in sales and use tax on returns. Retail sales tax returns contributed 73.3%, retailer's use tax returns 17.1%, consumer's use tax returns 1.1%, and remote seller returns 8.5%, according to the Iowa sales and use tax reporting reference. Use tax is not a technical footnote. It's a meaningful part of state revenue administration.
The Two Taxes Side by Side
Sales tax is generally collected by the seller during a taxable transaction. The seller determines whether the product or service is taxable, applies the relevant state and local rules, charges the buyer, files the return, and remits the tax.
Use tax is the complementary obligation that can arise when a taxable purchase is made without the appropriate sales tax being collected. The buyer generally self-assesses and pays the tax to the state where the property or service is stored, used, or consumed. The tax is intended to prevent a buyer from avoiding tax by purchasing from a seller outside the destination state.
The economic burden is meant to be similar. The compliance responsibility changes.
A single purchase shows the difference
Assume a Greenwich family office buys $40,000 of office equipment from a New Hampshire vendor. The equipment is delivered to Connecticut, where the family office uses it. New Hampshire doesn't charge sales tax at checkout, so the invoice shows zero sales tax.
Using the 8% rate supplied in this example, the Connecticut use tax would be approximately $3,200. The buyer, not the New Hampshire seller, must identify the taxable use, document the destination, accrue the liability, and report it under the applicable Connecticut filing process. The amount is a practical illustration of the shift in responsibility. The actual tax treatment still depends on Connecticut's rules, the equipment's use, exemptions, credits, and sourcing facts.
| Attribute | Sales Tax | Use Tax |
|---|---|---|
| Who handles the initial charge | Seller collects tax from the buyer | Buyer identifies and accrues tax when the seller didn't collect |
| When it usually arises | Taxable sale by a seller required to collect in the destination state | Taxable property or service is used in the destination state without sufficient tax at purchase |
| Who remits | Seller files and remits to the tax authority | Buyer reports and pays, often through a sales and use tax return |
| Tax base | Taxable sales price, subject to state-specific rules | Taxable purchase price or other prescribed base, subject to state-specific rules |
| Main compliance risk | Seller misclassifies the product, rate, location, or exemption | Buyer misses untaxed invoices, misidentifies use location, or fails to accrue |
| Destination relevance | Seller must source the transaction under applicable rules | Buyer must connect the purchase to the state where it's stored, used, or consumed |
Don't confuse seller's use tax with consumer use tax
Some states use the term seller's use tax for tax collected by a remote seller. From the buyer's perspective, that charge functions much like sales tax at checkout. Consumer use tax is the buyer-side obligation that remains when the seller didn't collect.
The invoice alone doesn't settle the issue. A zero tax line may mean the purchase was exempt, the seller lacked collection responsibility, the vendor applied the wrong rule, or the buyer now has a use tax accrual. Your accounting records need to distinguish among those possibilities.
Nexus Rules That Trigger Each Tax
Nexus determines when a seller must register, collect, file, and remit tax in a state. Traditional physical nexus can arise from inventory, employees, offices, warehouses, or other in-state activity. A fulfillment warehouse holding inventory, an employee visiting customers, or a company representative attending a trade show may create facts that require review.
Economic nexus expanded the analysis by focusing on a seller's sales activity into a state. Many states use a threshold built around $100,000 in sales or 200 transactions, but the rules aren't uniform. California, New York, and Texas have distinct requirements, so a business shouldn't use a generic threshold chart as its final answer. The reference material on use tax and sales tax differences describes the general economic nexus framework and the continuing importance of state-by-state analysis.
Physical and economic connections operate differently
Physical nexus asks whether the seller has a meaningful in-state presence or activity. Economic nexus asks whether the seller's sales into the state reach the applicable threshold during the relevant measurement period.
Marketplace facilitator laws add another layer. When Amazon, Etsy, Walmart Marketplace, or another platform is required to collect tax, the platform may handle the checkout charge and remittance for qualifying transactions. That doesn't cover every purchase your organization makes. Direct vendor relationships, independent websites, invoices, and non-marketplace subscriptions still need separate review.
Nexus answers the seller's collection question. It doesn't erase the buyer's destination-state use tax obligation.
Buyers shouldn't wait for a nexus determination
A family office may have no employees, inventory, or sales activity in a state and still owe use tax on property shipped there for use. The buyer's obligation follows the taxable use, not the seller's physical presence. That's why a company can be fully registered for sales tax in some states and still have unaddressed use tax exposure in others.
Click-through, affiliate, and cookie nexus rules can also remain relevant for sellers where asserted by a state. For buyers, the better control is operational. Track where goods are delivered, where software is accessed, where equipment is installed, and which entity owns the purchase.
How Collection and Self-Reporting Actually Work
The mechanics are different, but both systems require the same basic information: what was purchased, where it was delivered, where it was used, whether it was taxable, and how much tax was charged.
Suppose a Connecticut family office buys office furniture from a Massachusetts vendor. The seller reviews the delivery destination, determines whether the furniture is taxable, applies the applicable state and local rate, and adds the tax to the invoice if the seller has the required Connecticut collection responsibility. If the buyer provides a valid exemption certificate for an eligible purchase, the seller retains that documentation and excludes or adjusts the charge as permitted by Connecticut law.
The seller then reports taxable sales, collected tax, exemptions, credits, and other required information on the appropriate return. Filing frequency depends on the state's assignment and the taxpayer's facts. The finance team shouldn't assume that a vendor's monthly or quarterly cadence matches the buyer's own obligation.
| Step | Sales Tax Collection | Use Tax Self-Reporting |
|---|---|---|
| 1. Identify the transaction | Seller reviews the product, service, customer, and destination | Buyer reviews invoices, cards, reimbursements, and purchases outside normal procurement |
| 2. Determine taxability | Seller applies product and service rules | Buyer applies the destination state's rules to the actual use |
| 3. Confirm exemptions | Seller collects and validates exemption documentation | Buyer retains support for resale, manufacturing, or other eligible exemptions |
| 4. Calculate the base | Seller reviews price, freight, labor, discounts, and other components under state law | Buyer reviews the full invoice and separates taxable and nontaxable charges |
| 5. Report and remit | Seller files the required sales or seller's use tax return | Buyer includes the accrual on the applicable use tax or combined sales and use tax return |
| 6. Preserve records | Seller retains invoices, certificates, and filing support | Buyer retains invoices, delivery evidence, tax calculations, and payment records |
The buyer's review starts with the invoice
First, flag purchases where the seller charged no tax or charged tax for a different state. Next, determine the delivery and use locations. Then review whether the item is taxable, whether an exemption applies, and whether tax paid to another state may qualify for a credit.
Freight and installation often cause errors because vendors may combine materials, delivery, labor, and installation into a single line. Don't accept the invoice structure without checking the destination state's treatment. A marketplace facilitator may also collect tax on the merchandise while a separate shipping, service, or direct-vendor charge remains untreated.
Accrue by transaction, not by memory
Use tax should be recorded when the purchase enters the accounting system or when the organization receives the card or reimbursement data. Waiting for year-end forces the team to reconstruct use locations and taxability from incomplete records. A recurring accrual process produces a defensible audit trail and gives management a clearer estimate of the actual cost of remote procurement.
Multi-State Exposure for Investors and Family Offices
Family offices rarely have a single purchasing pattern. A Florida condo owner may buy art in New York and arrange delivery to Florida. A Texas LLC may purchase SaaS used by remote employees in California. A family office may pay an advisor whose work supports entities, properties, or investments in several states. Each transaction requires an ownership, delivery, and use analysis.
The risk increases when one organization manages several legal entities. A real estate holding company may buy building materials, appliances, landscaping equipment, and furnishings. A management company may pay software, payroll services, advertising, and professional fees. An operating business may buy equipment through a related entity and move it across state lines. The accounting system may record the expense correctly while missing the sales and use tax treatment.
Build the exposure map around actual spending
Start with the categories that create the most confusion:
- Real estate capital purchases: Materials, fixtures, appliances, equipment, and furnishings can be bought outside the property's state and delivered through contractors or freight providers.
- SaaS and digital subscriptions: The vendor's headquarters and billing address may differ from the locations where employees access or benefit from the service.
- Art and collectibles: A purchase made through a gallery or dealer in one state may be shipped to a residence, storage facility, or exhibition location elsewhere.
- Professional and management services: The purchaser needs to examine the service's taxability and the applicable sourcing rules, not just the advisor's mailing address.
- Entity-level reimbursements: A family member or executive may pay personally, then submit an expense report that omits the state and use details needed for tax review.
Separate entity ownership from household convenience
A family office shouldn't treat all spending as one pool. The legal purchaser, property owner, operating entity, and ultimate user can differ. That difference affects exemption certificates, resale treatment, capitalization, intercompany charges, and the state return where the liability belongs.
Quarterly estimates and year-end accruals should include a documented use tax review. The calculation doesn't need to be perfect on the first pass, but it must be based on source data. Pull vendor spend by entity, state, general ledger account, and payment method. Review unusual concentrations, new vendors, large capital purchases, and invoices with missing tax.
A clean general ledger isn't proof of sales and use tax compliance. It only proves that someone recorded the expense.
Rate volatility makes this work harder. The 2025 national sales and use tax report describes a tax environment in which states are modifying rates, taxable bases, and sourcing rules. Investors should treat a new property, new software stack, acquisition, or remote workforce as a tax-control event, not merely an accounting event.
The Hidden Compliance Gap in the Digital Economy
Use tax isn't a minor back-office item. It's a data problem created by a large jurisdiction footprint, frequent rule changes, and a vendor base that doesn't fit neatly into purchase orders.
Recent coverage tracked more than 12,414 new and updated sales and use tax jurisdictions in 2025, while also recording 681 total sales tax rate changes and new rates. The 2025 rate-change coverage reported an average state sales tax rate of 5.5592%. Those figures matter because a finance team can't reliably maintain a static spreadsheet when local rates and district taxes keep changing.
SaaS exposes weak classification controls
Software subscriptions, streaming services, digital advertising, and online marketplace purchases can fall under different rules depending on the state, product, delivery method, and business use. A vendor may bill from one location while users access the service across several states. A platform may collect tax on one component of a transaction while a direct invoice covers another.
Tax base expansion makes the classification problem more serious. The analysis of digital software taxation describes how states are reconsidering distinctions among tangible software, downloaded software, and remotely accessed software. It also notes that states have different approaches to taxing digital products and business purchases. That means finance teams need a taxability map, not a blanket assumption that “software is exempt” or “software is taxable.”
The missing data usually sits outside accounts payable
Enterprise resource planning systems often capture purchase orders and approved invoices. They may not capture:
- Corporate-card transactions: Purchases can bypass the purchase order process entirely.
- Non-PO invoices: Property managers, contractors, and professional advisors may submit invoices outside standardized workflows.
- Employee reimbursements: A receipt may show the vendor and amount but not the state where the item was used.
- Personal-account purchases: Family members may pay for household, property, or investment expenses and request reimbursement later.
- Marketplace orders: The platform receipt may not clearly separate collected tax, shipping, fees, and direct seller charges.
The exposure is structurally larger for high-net-worth households and family offices because their spending is concentrated in expensive assets, properties, travel, art, technology, and outsourced services. Small invoices also create false comfort. An auditor may not care that each charge looked immaterial if the same control failure affected the entire vendor population.
Data matching and organized audit requests can create significant pressure. States have the ability to cross-reference reported sales, vendor information, property records, and payment activity. A strong defense strategy should be established well before any official notice is received.
Practical Strategies to Stay Compliant and Reduce Risk
A workable program starts with a transaction inventory, not a generic tax calendar. Family offices, real estate syndicators, and closely held businesses should know which entities buy taxable property, where those purchases are delivered, where they're used, and who owns the liability.
Build a state and entity matrix
Create one row for every relevant entity and jurisdiction. Include:
- Registration status: Record whether the entity is registered, filing, or reviewing an obligation.
- Nexus facts: Note employees, inventory, property, contractors, marketplace activity, and remote sales.
- Threshold monitoring: Track each state's economic nexus rules instead of relying on a universal threshold. The commonly used $100,000 or 200-transaction framework is not a substitute for reviewing state-specific rules, as described in the sales and use tax comparison guidance.
- Marketplace treatment: Identify which platforms collect tax and which direct purchases remain outside platform collection.
- Taxability categories: Map construction materials, equipment, furnishings, SaaS, advertising, subscriptions, and professional services separately.
Update the matrix when an entity acquires property, hires across state lines, launches a new service, changes vendors, or adopts a new payment platform.
Put certificates under control
Exemption certificates shouldn't sit in an email folder. Store the certificate with the vendor record and transaction support. Review resale, manufacturing, governmental, nonprofit, and other exemption claims before the purchase occurs. An occasional out-of-state certificate may be valid in one transaction and irrelevant in another, so the accounting team needs the reason for the exemption, not just a signed form.
Accrue use tax every quarter
Connect the review to accounts payable and card data. A practical quarterly process looks like this:
- Export vendor invoices, card transactions, reimbursements, and property-related disbursements.
- Filter for missing tax, out-of-state vendors, large capital purchases, SaaS, digital services, and marketplace charges.
- Assign the legal purchaser, delivery state, use state, tax category, and exemption status.
- Calculate the accrual and record it in the correct entity's books.
- Reconcile the accrual to the state return and retain the supporting file.
A basic journal entry might debit the related expense or asset account and credit an accrued sales and use tax liability. The exact accounts depend on the entity's accounting policy and whether the tax is capitalized, expensed, recoverable, or eligible for a credit.
Fix old exposure before an audit starts
If prior periods contain missed use tax, evaluate a voluntary disclosure agreement or other state remediation path. The right approach depends on the state, filing history, registration status, lookback exposure, and available records. Don't file blindly, and don't wait for a notice before estimating the liability.
For audit defense, retain invoices, purchase orders, delivery records, bills of lading, exemption certificates, use-location support, taxability decisions, rate research, returns, payment confirmations, and reconciliation workpapers. Respond to information document requests with a controlled production log. Assign one person to coordinate responses, and involve a state and local tax advisor before making factual concessions.
Blue Sage Tax & Accounting Inc. provides sales tax reviews, multi-state tax compliance, accounting support, projections, and audit representation for individuals, family offices, real estate entities, and closely held businesses. To turn scattered vendor and card data into a defensible sales and use tax process, visit Blue Sage Tax & Accounting Inc. and request a review of your current exposure.