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Sales tax calculator: How to calculate your sales tax
Easily calculate sales tax rates in your state with our free sales tax calculator. Simply plug in your business address and ZIP code to get your total estimated sales tax rate.
TOTAL ESTIMATED TAX RATE
What is sales tax
Sales tax is a percentage-based tax a business collects from a customer at the point of sale and then remits to the state – and, in most states, the county or city – where the sale took place. The customer pays it; the seller is legally responsible for collecting the right amount and passing it along on schedule.
Because sales tax is set at the state and local level rather than federally, the rate depends entirely on where you’re selling. Most locations layer a city, county, or special-district rate on top of the state rate:
Total sales tax rate = State sales tax rate + applicable local rate(s)
For example, the sales tax rate can change significantly based on the exact location of the sale:
That’s why the full street address matters when calculating the exact sales tax rate.
How to calculate sales tax
Once you know your combined rate, the math is simple: multiply the price of the taxable item or service by that rate.
- Determine your total sales tax rate: Use the calculator above, or look up your state in the table further down this page. Say your combined rate comes out to 8.25%.
- Identify: The price of the item or service. For example, $50.
- Calculate the tax: Multiply price by rate: $50 × 8.25% = $4.13.
- Add it to the price: $50 + $4.13 = $53.13 is what the customer pays.
A few things can change that number:
For our sales tax calculator above, please note:
Keeping up with all three of those across every state you sell into is what actually causes filing errors – not the arithmetic. That’s the part Global FPO’s tax support team takes off your plate: we track rate changes and taxability rules for you and file on schedule, so the number above is the last time you have to think about it yourself.
Get help and guidance when you need it from real Intuit Experts.
Using our sales tax calculator
Our free sales tax calculator makes it easy to calculate the sales tax rates in your state. Follow these simple steps to get started.
STEP 1
Enter your business address
Sales tax can vary within the same ZIP code, so enter a complete street address, city, and state for the most accurate estimate.
STEP 2
Click the “Get rate estimate” button
Get an estimated combined state and local sales tax rate for the address. Actual rates may vary by product, service, customer type, and transaction.
Who has to collect sales tax?
If your business sells taxable goods or services, you generally need to register for a sales tax permit in any state where you have nexus, then collect and remit tax on taxable sales there.
Nexus is the connection that creates that obligation, and it comes in two forms:
Physical nexus: an office, warehouse, employee, or inventory located in the state.
Economic nexus: selling enough into a state to cross its threshold, even with no physical presence there at all.
Since the 2018 South Dakota v. Wayfair decision, most states have economic nexus thresholds based on sales, transactions, or both. Thresholds vary widely by state-for example, some use $100,000 in sales, while others use higher thresholds or transaction counts. These rules can also change over time.
What items do you collect sales tax for?
Sales tax generally applies to tangible goods sold for personal or business use, including:
Beyond standard goods, some states tax luxury items, RVs, specified services, and digital products like software and streaming.
Groceries are typically exempt or taxed at a reduced rate, while wholesale purchases and raw materials bought for resale or production are generally exempt with a valid resale certificate. However, exemptions vary by state, so always confirm whether an item is tax-free before assuming.
Sales tax rate by state
Sales tax rates vary widely by state, and five states charge no statewide sales tax at all: Alaska, Delaware, Montana, New Hampshire, and Oregon (shaded below). The table shows each state's base rate and the average combined rate once typical local taxes are added. Treat this as a reference point - the calculator at the top of this page gives you a rate for one specific address, which is what to rely on for an actual transaction.
| State | State Tax Rate | Average Local Rate | Average Combined Rate |
|---|---|---|---|
| Alabama | 4.00% | 5.46% | 9.46% |
| Alaska | 0.00% | 1.82% | 1.82% |
| Arizona | 5.60% | 2.94% | 8.54% |
| Arkansas | 6.50% | 2.98% | 9.48% |
| California | 7.25% | 1.78% | 9.03% |
| Colorado | 2.90% | 4.99% | 7.89% |
| Connecticut | 6.35% | 0.00% | 6.35% |
| Delaware | 0.00% | 0.00% | 0.00% |
How often should you file sales tax returns?
How often you file depends on the state and how much tax you collect. Most states default to monthly filing and step down to quarterly or annual filing once your collected tax volume drops below a state-set amount. Filing and payment are usually due on or after the 20th of the month following the reporting period – tax collected in April, for instance, is typically due around May 20th.
To stay ahead of it:
When paying and filing your sales taxes, ensure you’re keeping up with sales tax rates and obligations and set reminders for when you need to file.
Track rate and rule changes in every state where you have nexus.
Keep detailed, date-stamped records of every taxable transaction.
Know your filing frequency in each state and set reminders.
Use tax software or an outsourced tax team to track filing deadlines.
Where Global FPO fits in
A calculator can tell you today’s rate. It can’t tell you that your nexus footprint changed last quarter, that a state you sell into just adjusted its threshold, or that a filing is due in nine days. That’s the part a tool alone doesn’t solve – and it’s the part that actually causes penalties and back-tax bills.
Global FPO’s tax support team folds sales tax tracking, filing, and remittance into the bookkeeping and accounting work we already do for you, so it’s handled by people who are already looking at your books every month – not a separate tool you have to remember to check. That includes:
Monitoring nexus across every state you sell into as your revenue grows
Registering for a sales tax permit where you’ve become newly obligated
Calculating, filing, and remitting returns on the correct schedule for each state
Reconciling sales tax against your books so nothing gets missed at year-end
If you’re already working with Global FPO for bookkeeping or accounting, sales tax support plugs directly into that relationship. If you’re not yet, it’s one of the more straightforward places to start.
Sales tax calculator FAQ
Answers to common questions, so you know how we make finance simple and stress-free.
If you overcharge sales tax, you should refund the excess amount to the customer as soon as possible. Keep records of the refund transaction for your own records.