How this page is reviewed
See methodology, assumptions & sources
| Risk tier | High YMYL |
|---|---|
| Author | Calculover Editorial Team Finance and legal education |
| Editorial owner | Calculover Tax & Payroll Desk Tax and wage methodology owner |
| Reviewer | Calculover Editorial Review High-risk source and limitation review |
| Last reviewed | 2026-05-10 |
| Last verified | 2026-05-10 |
| Data effective date | 2026-01-01 |
Methodology
Sales Tax by State: 2026 Complete Guide applies the tax-rate, threshold, and taxable-base logic documented in the calculator formula section, then separates user-entered assumptions from statutory or source-linked rate inputs.
Assumptions
- Sales Tax by State: 2026 Complete Guide relies on the values the user enters and does not independently verify income, balances, legal status, policy terms, or market quotes.
- Taxable income, deductions, credits, filing status, jurisdiction, and timing are simplified to the fields available in the calculator.
- Federal, state, local, and international tax rules can change after the listed last-verified date.
Limitations
- Sales Tax by State: 2026 Complete Guide does not prepare a tax return, determine final liability, apply every credit or deduction, or account for all state, local, foreign, penalty, or surtax rules.
- Confirm current forms, thresholds, and filing obligations with the IRS, the relevant tax authority, or a qualified tax professional before filing or paying tax.
Sources
- Federal Income Tax Rates and Brackets, Internal Revenue Service
- Estimated Taxes, Internal Revenue Service
Professional guidance: Sales Tax by State: 2026 Complete Guide is for tax education and planning only and is not tax, legal, accounting, or filing advice. Verify current rules with the relevant tax authority or a qualified tax professional.
Sales tax in the United States is not determined by a uniform federal rate. Instead, retail taxation is decentralized across 45 states and over 10,000 local taxing jurisdictions (counties, municipalities, and special transit districts). A purchase in one city might incur a 4.0% combined rate, while the neighboring suburb charges 10.5%.
Understanding state baseline rates, local option add-ons, and product exemptions ensures consumers and e-commerce business owners accurately calculate tax obligations.
State vs. Local Sales Tax: The Combined Rate #
Total sales tax at the cash register is the sum of state and local levies:
Total Sales Tax = Purchase Price × (Rate_State + Rate_County + Rate_City + Rate_District) Total Out-of-Pocket Cost = Purchase Price + Total Sales Tax Visualizing Highest vs. Lowest Combined Sales Tax States #
Average combined state and local sales tax rates vary substantially across the nation:
2026 Average Combined State & Local Sales Tax
Comparing Top 4 Highest vs Zero-Tax NOMAD States.
| State | State Tax Rate | Average Local Rate | Total Average Combined Rate |
|---|---|---|---|
| Louisiana (LA) | 4.45% | 5.11% | 9.56% |
| Tennessee (TN) | 7.00% | 2.55% | 9.55% |
| Arkansas (AR) | 6.50% | 2.96% | 9.46% |
| Washington (WA) | 6.50% | 2.88% | 9.38% |
| California (CA) | 7.25% | 1.60% | 8.85% (Max 10.75% in some cities) |
| Oregon (OR) | 0.00% | 0.00% | 0.00% |
| New Hampshire (NH) | 0.00% | 0.00% | 0.00% |
| Delaware (DE) | 0.00% | 0.00% | 0.00% |
| Montana (MT) | 0.00% | 0.00% | 0.00% |
| Alaska (AK) | 0.00% | 1.76% (avg) | 1.76% (Local option only) |
The 5 NOMAD States with 0% State Sales Tax #
Five U.S. states — known by the acronym NOMAD — charge 0.0% state sales tax:
- New Hampshire: 0% sales tax (funds government via property and business taxes).
- Oregon: 0% sales tax (funded primarily by state personal income taxes).
- Montana: 0% state sales tax (select resort towns charge local 3% visitor taxes).
- Alaska: 0% state tax (select municipalities impose local taxes, avg 1.76%).
- Delaware: 0% sales tax (imposes a gross receipts tax on businesses instead).
Worked Calculation: Multistate Purchase Comparison #
An enterprise buys $40,000 in office hardware:
- Purchased in Portland, Oregon (0.0%): Total Sales Tax = $0. Final invoice = $40,000.
- Purchased in Seattle, Washington (10.35% combined): Total Sales Tax = \($40,000 \times 0.1035 = \mathbf{$4,140}\). Final invoice = $44,140.
- Purchased in Chicago, Illinois (10.25% combined): Total Sales Tax = \($40,000 \times 0.1025 = \mathbf{$4,100}\). Final invoice = $44,100.
The geographic location of delivery alters transaction costs by thousands of dollars. Compare pricing markups in our markup vs margin guide.
E-Commerce Economic Nexus & The Wayfair Rule #
Under the landmark 2018 Supreme Court ruling in South Dakota v. Wayfair, Inc., online sellers are required to collect sales tax based on the destination state of the customer once they exceed state economic thresholds (typically $100,000 in annual gross sales or 200 separate transactions into that state).
Standard Exemptions (Groceries, Clothing & Medicine) #
Most states provide full or partial exemptions for essential household items:
- Prescription Drugs: Exempt from sales tax in almost all 45 sales-tax states.
- Unprepared Groceries: Fully exempt in 32 states + DC; taxed at reduced rates in 6 states; taxed at full rates in only 7 states (e.g. Alabama, Mississippi).
- Clothing: Fully exempt in Pennsylvania, Minnesota, New Jersey, and Vermont; exempt up to $110/item in New York.
Key Takeaways #
- Combined sales tax combines state, county, municipal, and special transit district rates.
- The 5 NOMAD states (OR, NH, DE, MT, AK) levy 0% state sales tax.
- Online businesses must track economic nexus thresholds ($100k+ in destination sales).
- Calculate total purchase cost: compute tax and discounts instantly with our free Sales Tax Calculator.
Frequently Asked Questions #
What is the difference between sales tax and use tax?
Sales tax is collected by the seller at the point of purchase. Use tax is a legally equivalent tax paid directly by the buyer to their home state when purchasing goods from an out-of-state vendor who did not collect sales tax (e.g. buying untaxed furniture online and shipping it home).
What are state sales tax holidays?
Many states (e.g. Texas, Florida, Ohio) enact annual sales tax holidays (typically in August for back-to-school or May for hurricane preparedness), waiving state sales tax on qualifying clothing, school supplies, computers, or emergency gear under specified dollar caps.
Why does Alaska have local sales tax without a state sales tax?
The state government of Alaska does not levy a statewide sales tax, but Alaska state law grants local borough and city governments the authority to enact local sales taxes (ranging from 0% in Anchorage to 7.5% in smaller communities).
Primary Sources & Citations #
- Tax Foundation. (2026). State and Local Sales Tax Rates in 2026. Tax Policy Center.
- Supreme Court of the United States. (2018). South Dakota v. Wayfair, Inc., 585 U.S. 805.
- National Conference of State Legislatures (NCSL). (2025). State Sales and Use Tax Exemption Guide.
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