Everything you need to get US sales tax right.
US sales tax compliance is the process of determining where your business has nexus, registering in those states, charging the correct rate on taxable products, collecting and validating exemption certificates so untaxed sales stay defensible, filing a return by each state’s due date, and keeping the records that make an audit routine. This hub holds the rulebook for all 50 states, plus the guides, calculators and definitions finance teams use to stay current.
| States with a statewide sales tax | 45 + DC |
|---|---|
| States with no sales tax | 5 |
| Most common economic nexus threshold | $100,000 |
| Local taxing jurisdictions | 13,000+ |
| Typical registration turnaround | 3–10 days |
| Galvix onboarding time | 2–7 days |
Articles & guides
Platform comparisons, registration walkthroughs and taxability explainers, each written with a Galvix compliance manager.
12 Best Sales Tax Software for US Businesses To Try in 2026
Explore the best sales tax software for 2026. Compare top platforms and discover why Galvix is the smarter managed alternative.
How to File Florida Sales Tax Online in 2026
Know what to prepare, where to enter it, and what to save when filing Florida sales tax through the state portal.
How to File New Jersey Sales Tax Online in 2026
File confidently with a clear ST-50 workflow, clean sales data, exemption records, and fewer surprises inside the NJ Tax Portal.
Manufacturing Sales Tax Exemption Guide for Growing Businesses
Understand which production purchases qualify, which records states expect, and where audit gaps can develop as operations expand.
15 Best Vertex Certificate Center Alternatives for Exemption Certificate Management
Top 15 Vertex Certificate Center alternative options analyzed across pricing, features, pros, cons, and how Galvix compares to them.
State Sales Tax Exemption Certificate Guide for 2026
Find the right certificate, renewal rule, and verification path before an exempt sale becomes an audit problem.
How to Get a Sales Tax Exemption Certificate
Find the correct state form, complete every field, and keep exemption records ready before an audit starts.
State rulebooks
Select any state to open its full guide — current statewide rate, local add-ons, nexus thresholds, filing frequency and due dates. Search above filters this index.
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Nexus rules and city rates
Nexus thresholds by state
Revenue and transaction thresholds, evaluation periods, marketplace treatment and the date each rule took effect — for every state that imposes one.
Open nexus index →Combined rates for major cities
State, county, city and district components broken out for the largest US metros, with a page per city.
Browse cities →Free tools
See all tools →No signup, no rate limits. Built on the same jurisdiction data Galvix files with.
Sales tax rate calculator
Look up the combined rate for any US ZIP code, split by state, county, city and district.
Open calculator →Nexus exposure checker
Enter revenue and transaction counts per state to see where you have crossed a threshold.
Coming sooneBooks & templates
Filing calendars, an audit-readiness checklist and exemption certificate templates are in production.
Coming soonGlossary
All terms →Short, quotable definitions of the terms that appear on state notices and in filing software.
- Economic nexus
- An obligation to collect sales tax in a state triggered by revenue or transaction volume alone, without any physical presence. Established nationally by South Dakota v. Wayfair (2018).
- Physical nexus
- An obligation created by tangible presence in a state — an office, employee, contractor, inventory held in a warehouse, or attending a trade show in some jurisdictions.
- Exemption certificate
- A document a buyer provides to claim a sale is not taxable, typically for resale, manufacturing or nonprofit use. The seller must retain a valid, unexpired copy.
- Use tax
- A complementary tax the buyer owes on goods purchased without sales tax and consumed in their state. Frequently assessed during audits of out-of-state purchases.
- Trailing nexus
- A period after nexus ends during which a state still requires you to collect and file, ranging from the remainder of the year to a full calendar year.
- Marketplace facilitator
- A platform that collects and remits sales tax on behalf of its sellers. Facilitated sales may still count toward your nexus thresholds in some states.
Product documentation
Connection guides for every billing system Galvix reads transactions from, plus how data flows into nexus tracking and returns.
Open documentation →Walkthroughs
Watch all → (opens in a new tab)
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9 min Case studies
All customers →From Sales Tax Nightmare to Sleep peacefully at Night Confidence: Meredith's Journey with Galvix
Discover how The Informed SLP streamlined their sales tax compliance with Galvix, reducing filing time and ensuring accuracy across multiple states.
Read the story →From Sales Tax Stress to Smoothly Sailing Through. This is the journey of Lindye Galloway with Galvix
Discover how Lindye Galloway streamlined their sales tax compliance with Galvix, reducing filing time and ensuring accuracy across multiple states.
Read the story →Common questions
Short answers, each linking to the page that carries the full rule. These are also published as structured data for search and AI assistants.
What is sales tax nexus?
A connection between your business and a state that obliges you to register, collect and remit sales tax there. It comes from physical presence — an office, employee or inventory — or from economic activity above a state threshold, most commonly $100,000 in sales or 200 transactions over 12 months.
How many US states charge sales tax?
Forty-five states and the District of Columbia impose a statewide sales tax. Alaska, Delaware, Montana, New Hampshire and Oregon do not, although Alaska permits local sales taxes at the city and borough level.
Is SaaS taxable?
It depends on the state. Roughly 20 states tax business-to-business SaaS, including New York, Texas, Washington and Pennsylvania, while California and Florida generally do not. Each state guide records the current treatment and its statutory basis.
When do I need to register for a sales tax permit?
Once you cross a state's nexus threshold, and before the next taxable sale into that state. Most states issue a permit in three to ten business days, and many charge no fee. Selling without a permit where you have nexus creates back-tax and penalty exposure.
Stop reading about sales tax. Let us own it.
A named compliance manager handles nexus monitoring, registrations, filings, exemption certificates and state notices in all 50 states. You are live in 2–7 days and spend under 30 minutes a month on it.