Sales tax for small businesses (2026 guide)

Sales tax for small businesses is a tax that states collect on goods and services at checkout and send to the government. If your business sells products—and increasingly, digital goods—you may need to collect it and file it in one or more states.

Here’s what makes 2026 different from prior years: states now require you to collect sales tax based on how much you sell, not just where you’re located. If you hit $100,000 in sales to customers in California, you owe California sales tax—even if you’ve never set foot there. This creates varying rules for what’s taxable, when to file, and which platforms handle it for you—plus compliance can get messy fast.

Definition (Featured Snippet Ready):
Sales tax for small businesses is a tax that states collect on goods and services at checkout and send to the government.

What is sales tax and how does it work?

Sales tax is a consumption tax, meaning a charge applied when someone buys something. Most states collect sales tax at checkout, also known as a point-of-sale tax model. 

Here’s how it works:

The customer pays the tax. When someone buys a $100 item with 10% sales tax, they pay $110 total.

Your business collects the tax. You add the tax to the price at checkout and keep it separate from your revenue.

Your business sends it to the state. You file a return—monthly, quarterly, or annually depending on the state—and remit what you collected.

The critical piece: you’re charging the tax on behalf of the state. That $10 isn’t yours. If you collect it and don’t remit it, states treat that as theft.

Sales tax formula:
Sales tax = Sales price × State + local rate

How is an excise tax different from a sales tax?

People often confuse sales tax and excise tax. Both are consumption taxes, but they work differently.

Sales tax is a percentage of the purchase price, added at checkout, and applies to most goods and services.

Excise tax is a flat fee or percentage built into the price before you buy, and it only applies to specific products like gasoline, alcohol, tobacco, and tires.

Example: When you buy gas, the price per gallon already includes federal and state excise taxes. Then, depending on your state, sales tax may be added on top at the pump.

If you’re wondering how an excise tax is different from a sales tax, it’s who pays it upfront and what it targets.

Does my small business need to collect sales tax?

The answer depends on nexus, which is your business connection to a state.

There are two types:

Physical nexus

You have a physical presence in the state, such as:

• An office
• A warehouse
• Employees working there
• Inventory stored there

If any of the above apply to your business, you almost certainly need to collect sales tax in that state.

Economic nexus

After the 2018 Supreme Court decision in South Dakota v. Wayfair, states can require you to collect sales tax based on sales volume alone—even if you have zero physical presence there.

Most states use thresholds like:

• $100,000 in sales annually, OR
• 200 transactions annually

Hit either one, and you’re on the hook in that state.

This is what’s called economic nexus—laws that require you to collect and remit sales tax in a state based purely on how much you sell there, regardless of whether you have a store, office, or employees in that state.

Quick guide to what triggers sales tax collection:

• Selling physical goods? Most likely.
• Selling digital products? Depends on the state. Some tax software, ebooks, and downloads. Others don’t.
• Selling services? Varies widely. Most states don’t tax services, but some do.

Economic nexus explained

Economic nexus is why multi-state selling got complicated.

Before 2018, you only owed sales tax in states where you had a physical presence. That changed with the Wayfair ruling. Now, if you sell enough into a state, you trigger nexus, even if you’ve never been there.

This especially impacts:

• Shopify sellers shipping nationwide
• Amazon third-party sellers
• SaaS companies with customers in multiple states
• Any ecommerce business doing volume across state lines

Marketplace facilitator laws add another layer. These are state laws that require platforms like Amazon, Etsy, and eBay to collect and remit sales tax on behalf of sellers. But they don’t cover everything—if you sell through your own website or certain channels, you’re still responsible.

The bottom line: economic nexus means you need to track where your customers are, not just where your business is.

How to calculate sales tax (step-by-step)

If you need to know how to calculate sales tax, here’s the method.

Formula:

Sales tax = Item price × Sales tax rate
Total price = Item price + Sales tax

Example: Los Angeles, CA (10.25%)

• $100 item
• Sales tax = $100 × 10.25% = $10.25
• Total = $110.25

That’s it. Multiply the price by the rate and add it to the total.

The tricky part is knowing which rate to use. States have base rates, and then counties, cities, and special districts add their own.

How to calculate sales tax for multiple states

Combined state and local rates determine what you charge.

Always verify current rates with the state’s Department of Revenue. Rates change, and using outdated numbers can lead to undercollection and penalties.

Sales tax deduction

Is sales tax deductible?

Yes, sales tax may be deductible, but not the sales tax you collect from customers.

Here’s the distinction:

• Individual deduction (Schedule A): If you itemize deductions on your personal tax return, you can deduct state and local sales tax instead of state income tax. You pick whichever is higher.
• Business purchases: Sales tax you pay on business expenses is deductible as part of the cost of the item. If you buy a $1,000 laptop and pay $80 in sales tax, you deduct $1,080.
• What you cannot deduct: Sales tax you collected from customers. That money was never yours—it belongs to the state. Deducting it would be like deducting someone else’s payment.

Sales tax deduction calculator (simple version)

Deductible sales tax = Total qualifying purchases × Applicable tax rate

The IRS provides a Sales Tax Deduction Calculator to estimate allowable amounts when you itemize. But most small business owners benefit more from deducting business expenses than from itemizing sales tax on personal returns.

States with no sales tax

If you’re searching for what states don’t have sales tax, here’s the list.

As of 2026, five states have no statewide sales tax:

• Delaware
• Montana
• New Hampshire
• Oregon
• Alaska (no state tax, but some cities and boroughs charge local sales tax)

If you’re based in one of these states, you don’t collect sales tax on in-state sales. But if you sell to customers in other states and trigger nexus there, you still owe sales tax in those states.

Highest sales tax in the US

When people ask about the highest sales tax in the US, they’re usually asking about combined state and local rates.

States set base rates. Then counties, cities, and special taxing districts add their own. The combination determines what customers actually pay.

High combined-rate locations include:

• Los Angeles, CA: ~9.75%
  State rate: 6.0%
  County, city, and special district taxes can push it above 10%.
• Chicago, IL: ~10.25%
  State rate: 6.25%
  Cook County, city, and special taxes add roughly 4%.
• New York City, NY: ~8.88%
  State rate: 4.0%
  NYC and special district taxes bring it to 8.875%.
• Seattle, WA: ~10.55%
  State rate: 6.50%
  Seattle adds local taxes that push it above 10%.
• Tennessee cities: ~9.5–10%
  State rate: 7%
  Local taxes typically add another 2–3%.

The takeaway: always check local rates, not just state rates.

Sales tax rules in key states

Below is a high-level overview for small businesses in major states. For additional state-specific information, check here.

Arizona

• Base rate: 5.6% (state Transaction Privilege Tax)
• Local taxes: Cities and counties add their own rates
• Economic nexus threshold: $100,000 in annual gross sales
• Filing frequency: Monthly, quarterly, or annually depending on volume

California (Los Angeles & San Diego)

• Base rate: 7.25%
• Local district taxes: Increase rates significantly (LA ~10.25%)
• Economic nexus threshold: $500,000 in sales
• Marketplace facilitator laws: Yes
• Filing frequency: Monthly, quarterly, or annually

New York (NYC)

• Base rate: 4%
• NYC combined rate: 8.875%
• Economic nexus threshold: $500,000 + 100 transactions
• Filing frequency: Quarterly or monthly

Florida

• Base rate: 6%
• Local surtaxes: Apply in most counties
• Economic nexus threshold: $100,000
• Filing frequency: Monthly or quarterly

Texas

• Base rate: 6.25%
• Local additions: Up to 2%
• Economic nexus threshold: $500,000
• Filing frequency: Monthly or quarterly

New Jersey

• Base rate: 6.625%
• Economic nexus threshold: $100,000 or 200 transactions
• Filing frequency: Quarterly or monthly

Maryland

• Flat rate: 6%
• Local add-ons: None
• Economic nexus threshold: $100,000 or 200 transactions

Tennessee

• Base rate: 7%
• Local additions: Can exceed 2%
• Combined rates: Among the highest in the US
• Economic nexus threshold: $100,000

Illinois (Chicago)

• Base rate: 6.25%
• Chicago combined rate: 10%+
• Economic nexus threshold: $100,000 or 200 transactions

Virginia

• Base rate: 4.3%
• Combined rates: ~5.3–6%
• Economic nexus threshold: $100,000 or 200 transactions

Minnesota

• Base rate: 6.875%
• Local additions: Apply in some areas
• Economic nexus threshold: $100,000 or 200 transactions

Indiana

• Flat rate: 7%
• Local add-ons: None
• Economic nexus threshold: $100,000

Rhode Island

• Flat rate: 7%
• Economic nexus threshold: $100,000 or 200 transactions
• Filing frequency: Monthly or quarterly

Delaware (No Sales Tax)

• State sales tax: None
• Local sales tax: None
• Note: Businesses may owe gross receipts tax instead

How to file sales tax for your small business

Filing sales tax follows the same basic process in every state:

1. Register for a sales tax permit
Apply through your state’s Department of Revenue. You’ll get a permit number and filing schedule.

2. Collect the correct rate
Use the combined state and local rate for the customer’s location. Most point-of-sale systems and ecommerce platforms calculate this automatically.

3. Track taxable vs exempt sales
Not everything is taxable. Keep records of what you sold, what you charged, and what was exempt.

4. File a sales tax return
Submit a return on your state’s schedule, whether monthly, quarterly, or annually. Even if you collected zero sales tax, you may need to file a zero return.

5. Remit payment by deadline
Send what you collected to the state. Miss the deadline, and you’ll owe penalties and interest.

Filing frequency depends on your state and revenue level. High-volume sellers file monthly. Lower-volume sellers file quarterly or annually.

Common sales tax mistakes small businesses make

Not registering in all nexus states
If you trigger nexus in five states but only register in two, you’re accumulating liability in the other three. States can audit you retroactively.

Using incorrect city-level rates
State rates are easy to find. Local rates change constantly. Charging 6% when the customer’s city requires 8.5% means you’re undercharging—and you’re still liable for the difference.

Missing filing deadlines
Penalties and interest accumulate fast. A $500 tax bill can become $750 if you’re 60 days late.

Deducting collected sales tax
That money isn’t income. It’s a liability you owe the state. Deducting it triggers audits.

Ignoring marketplace facilitator rules
Amazon and other market places might collect sales tax on some of your sales but not all. If you assume they’re handling everything, you’ll miss filing obligations on direct sales.

When should you hire an accountant for sales tax?

You may need professional support if:

You sell in multiple states
Each state has different tax rates, filing schedules, and nexus rules. Keeping track across jurisdictions gets complicated quickly. Professional support helps ensure you’re registered correctly, collecting the right rates, and filing on time everywhere you’re required to.

You’ve crossed economic nexus thresholds
Once you exceed a state’s revenue or transaction threshold, you’re legally required to register and collect sales tax, even without a physical presence. An accountant can identify where you’ve triggered nexus and prevent costly penalties for late registration.

You operate ecommerce or SaaS
Online and SaaS businesses often trigger multi-state nexus and face varying rules for digital product taxability. Professional guidance ensures you understand marketplace facilitator laws and how different states treat software and digital services.

You’re rapidly growing
Growth can push you into new tax obligations before you realize it. A tax professional can proactively monitor thresholds and implement systems that scale with your business.

You have complex product taxability issues
Some products are taxable in certain states but exempt in others—especially bundled goods, digital items, or industry-specific products. Expert support reduces audit risk by properly categorizing and documenting your tax treatment.

Sales tax compliance got complicated after Wayfair. If you’re selling across state lines, the right support can save you from penalties, audits, and wasted time.

Sales tax for small businesses key takeaways

• Sales tax is collected from customers and sent to states
• Economic nexus rules require collection based on sales volume, not physical presence
• State tax formula: Item price × Tax rate
• Five states have no sales tax
• Combined local rates can push total tax above 10%
• You cannot deduct sales tax you collected
• Multi-state sellers face higher compliance risk

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Sales tax for small businesses FAQ

What is sales tax for small businesses?

Sales tax for small businesses is a tax that states collect from customers at checkout and send to the government.

How do I calculate sales tax?

Multiply the item price by the combined state and local rate.
Formula: Item price × Tax rate.

Is sales tax deductible?

Yes, sales tax paid on business purchases may be deductible. Sales tax collected from customers is not deductible.

What states don’t have sales tax?

Delaware, Montana, New Hampshire, Oregon, and Alaska (no statewide tax).

Which state has the highest sales tax?

States like California, Tennessee, and Illinois often have the highest combined state and local sales tax rates.

Do online businesses have to collect sales tax?

Yes, if they meet physical or economic nexus thresholds in a state.

What is economic nexus?

Economic nexus means you must collect sales tax in a state based on revenue or transaction volume—even without physical presence.

How is excise tax different from sales tax?

Sales tax is charged at checkout and applies broadly. Excise tax applies to specific goods and is built into the product price.

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