Sales Tax Permit / Seller’s Permit: How to Apply

What is a sales tax permit? A sales tax permit (also called a seller’s permit, sales and use tax license, or resale certificate in some states) is a state-issued license that allows your business to legally collect sales tax from customers and remit it to the state. You need one in every state where you have “nexus” — a physical presence or significant economic activity.

A sales tax permit is one of the first registrations a new product-based business needs to complete — often before the first sale. Selling without one in a state that requires it can mean back taxes, penalties, and interest that quickly dwarf any other startup cost. This guide explains who needs a permit, how to apply in every state, what nexus means in 2026, and how to stay compliant once the permit is in hand.

Who Needs a Sales Tax Permit?

You need a sales tax permit in any state where you have “nexus” and where you sell taxable goods or services. The most common ways to establish nexus:

• Physical presence: Office, warehouse, store, employees, or independent contractors in the state.
• Economic nexus: Crossing the state’s sales threshold (typically $100,000 in annual sales or 200 transactions, but varies by state).
• Inventory storage: Even storing goods in a fulfillment center (Amazon FBA) creates nexus in that state.
• Affiliates or marketplace facilitators: Selling through Amazon, eBay, Etsy, or Walmart usually triggers permit requirements in many states — though the marketplace often collects on your behalf.
• Trade shows or temporary events: Even short-term physical presence can trigger nexus.

If you sell only digital services (consulting, freelance writing, SaaS) the rules vary widely by state. Some states tax SaaS and digital downloads; others do not. Check your home state’s rules first, then add states as you grow.

How to Apply for a Sales Tax Permit

1. Form your business and get an EIN. Most states require both before issuing a sales tax permit. See our guide on how to get an EIN.
2. Identify the states where you have nexus. Start with your home state. Add others as you cross economic thresholds.
3. Visit each state’s revenue department website. Look for “sales tax registration” or “seller’s permit.”
4. Complete the online application. You will need your EIN, business address, NAICS code, estimated monthly sales, and bank account info for any returns to be deposited.
5. Pay the fee (if any). Most states issue permits free; a few charge $5–$100.
6. Receive your permit number. Most states issue it instantly online or within 2–3 business days.
7. Display the permit. Some states require posting at your place of business.
8. Set up sales tax collection in your point-of-sale or e-commerce platform. Shopify, Square, WooCommerce, and most others let you enter the permit and automatically collect the right rate.

Sales Tax Permit Costs by State

State Type	Permit Cost	Examples
No-fee states	$0	Texas, Florida, California, New York
Low-fee states	$5 – $50	Colorado ($16), Connecticut ($100)
Higher-fee states	$50 – $100	South Carolina ($50), Washington ($90)
No sales tax (no permit needed)	N/A	Alaska, Delaware, Montana, New Hampshire, Oregon

What’s Taxable and What’s Not

The general rule: tangible personal property is taxable in most states. Services, digital goods, and food vary. A few categories are typically exempt:

• Most groceries (in most states)
• Prescription medications
• Resale items (you have a resale certificate)
• Sales to non-profit organizations (with proper documentation)
• Wholesale sales between businesses
• Sales to government entities

Software-as-a-service (SaaS) is taxable in roughly half the states — including New York, Washington, Texas, and Pennsylvania — and not in the other half. Digital downloads (ebooks, music, software) have similar split rules. When in doubt, check the state’s revenue department website or consult a state-specific guide.

Economic Nexus Thresholds

Since the 2018 South Dakota v. Wayfair decision, every state can require out-of-state sellers to collect sales tax once they cross an economic threshold. The most common thresholds:

• $100,000 in sales OR 200 transactions per year — the most common threshold (most states)
• $500,000 — California, Texas, New York
• $250,000 — Alabama, Mississippi
• $100,000 only (no transaction count) — Florida, Tennessee, Arizona

Track your sales by state from day one. Once you cross a threshold, you typically have 30–60 days to register before collection is required. Missing the window usually means owing the state for uncollected tax going back to the threshold date.

Resale Certificate vs Sales Tax Permit

These two terms are often confused. The sales tax permit lets you collect sales tax from your customers. The resale certificate (sometimes a separate document, sometimes the same number) lets you buy inventory from suppliers without paying sales tax — because you are reselling it and your customer will pay the tax at the final sale. Show your resale certificate to wholesalers; show your sales tax permit number on customer-facing communications.

How to File Sales Tax Returns

Once you have a permit, the state will assign a filing schedule based on your sales volume — monthly, quarterly, or annually. Each filing requires:

• Total gross sales for the period
• Total taxable sales
• Total exempt sales
• Sales tax collected
• Any credits or adjustments
• Payment of the tax due

Most states require electronic filing and payment. Late filings trigger penalties of 5–25% of the tax owed, plus interest. Even a “zero return” must be filed when you have a permit but no sales for the period — skipping creates the same penalty as underreporting. Track sales tax collected separately in your bookkeeping with our money and bookkeeping forms.

Multi-State Sales Tax Compliance

Once you have nexus in multiple states, manual compliance becomes painful — each state has its own portal, filing dates, and rules. Automated tools like TaxJar, Avalara, and Anrok pull data from your e-commerce platform, calculate the right tax by jurisdiction, file returns, and remit payment. They typically cost $50–$300/month depending on volume — worth it once you sell into more than 3–4 states regularly.

Marketplace Facilitator Laws

If you sell through Amazon, Etsy, eBay, Walmart, or another major marketplace, the marketplace itself often collects and remits sales tax for you in most states under “marketplace facilitator” laws. You may still need a permit in your home state and to report marketplace sales on your returns, but the marketplace handles the actual collection. Verify in each state — a handful still require the individual seller to register.

Common Sales Tax Mistakes

• Selling before registering. Many states require registration before your first taxable sale, not after.
• Missing nexus in a new state. Crossing the $100k threshold in California means registering immediately, not at year-end.
• Charging the wrong rate. Local rates vary by city and county on top of the state rate. Use software that handles geocoding.
• Forgetting to file zero returns. If you have a permit but no sales in the period, you still must file.
• Treating sales tax as revenue. Sales tax collected is not your money — keep it in a separate bank account until you remit it.
• Not tracking exempt sales. Keep resale and exemption certificates from every wholesale customer. Auditors will ask.

Sales Tax for Service Businesses

Service-based businesses (consulting, freelance design, agencies, professional services) are subject to wildly different rules depending on the state and the service type. A few examples to illustrate the variation. Hawaii taxes almost every service. South Dakota and New Mexico tax most services. Connecticut, Texas, Iowa, and Washington tax specific service categories (computer services, telecommunications, repair, advertising) but not others. New York, California, and Massachusetts tax services only in narrow situations. Always check the state’s specific list before assuming services are exempt.

Sales Tax on Shipping and Handling

Whether shipping charges are taxable depends on the state and how the charge is presented on the invoice. Some states (Texas, New York, Pennsylvania) tax shipping if it is bundled with a taxable sale. Others (California, Florida) generally exempt separately-stated shipping. The safest approach: separate the line items on every invoice (subtotal, shipping, sales tax) and configure your e-commerce platform with the correct state-by-state rule.

State vs Local Sales Tax

Most states allow cities and counties to add their own sales tax on top of the state rate. Combined rates can range from under 5% (Hawaii, Wyoming) to over 10% (parts of Tennessee, Louisiana, Alabama). Some states require a single combined filing; others require separate local returns. Use geocoded tax software if you ship to multiple locations within a state — manual rate lookup at scale is a recipe for errors.

Renewing Your Sales Tax Permit

Permits are usually permanent unless you close the business or change ownership. A few states (Connecticut, Pennsylvania) require renewal every 1–5 years. Always update the state when your address, ownership, or business activity changes. Failing to update can lead to permit cancellation and re-registration delays. For broader federal tax guidance, see the IRS small business tax center: irs.gov/businesses/small-businesses-self-employed.

Closing a Sales Tax Permit

When you close the business or stop selling in a state, formally close the permit by filing a final return and notifying the state. Otherwise the state expects ongoing filings and will eventually levy penalties for non-filing. Most states close the account same-day once they receive the final return and any remaining tax due.

Audit Risk and How to Reduce It

State sales tax audits target businesses with patterns the state considers high risk: cash-heavy industries (restaurants, salons, retail), businesses with large exempt sales claims (wholesale, resale), and businesses that file late or report unusual ratios. To stay below the audit radar: file on time every period, keep resale certificates from every wholesale customer, save invoices for every taxable sale for at least four years, and reconcile sales tax collected against deposits every month.

If you do receive an audit notice, do not panic. The state typically reviews three years of records and reconciles your reported sales against bank deposits, point-of-sale data, and 1099-K reports from payment processors. Most audits result in either no change or a modest adjustment when records are clean.

How Sales Tax Fits Into Your Broader Compliance

Sales tax is one of the many registrations a new business juggles. The typical order: form the LLC, get an EIN, apply for a business license, register for sales tax, register for state employer taxes (if hiring), and file the BOI report. See our full document checklist for starting a business to keep them in order.

Tips for Brand-New Sellers

• Register in your home state before your first taxable sale, not after.
• Open a separate bank sub-account or savings account for sales tax collected — never spend the trust-fund portion.
• Set a monthly calendar reminder one week before each filing deadline.
• Use e-commerce platform tax automation (Shopify Tax, Square, WooCommerce TaxJar plugin) from day one.
• If you sell at trade shows, get a temporary sellers permit (usually free, takes 5 minutes) for that state instead of risking an unregistered sale.
• Keep a master list of every state where you hold a permit, the filing frequency, and the next deadline.

Frequently Asked Questions

Do I need a sales tax permit if I sell online?

Yes — in your home state immediately, and in any other state where you cross the economic nexus threshold (usually $100,000 in sales or 200 transactions). Marketplaces like Amazon and Etsy often collect for you, but you may still need to register and report.

How much does a sales tax permit cost?

Most states issue permits free. A few charge $5–$100. The bigger cost is the time and software needed to file accurate returns on time.

What happens if I do not get a sales tax permit?

States can assess back tax for every sale you should have collected on, plus 5–25% in penalties and interest. They can also revoke your business license and pursue personal liability against the owners of a corporation or LLC for trust-fund taxes.

Use Tax: The Other Side of Sales Tax

“Use tax” is the companion to sales tax — it covers tax owed on goods purchased without paying sales tax (typically from out-of-state sellers). Many states require businesses to self-report and pay use tax on items bought online for business use when no sales tax was collected. The most common example: buying office equipment from a small out-of-state vendor that did not charge tax. The use tax rate is the same as the sales tax rate in your jurisdiction. Track use-taxable purchases monthly and report them with your sales tax return.

Next step: with your sales tax permit in place, organize your tax records using our money and bookkeeping forms and learn about other business licenses you may need.