US Sales Tax Basics for Online Sellers
US sales tax is a patchwork, not a single rule. Here is the foundation every online seller needs.
Sales tax rates
Charge the right US sales tax, every time
SalesTaxly returns accurate United States sales tax rates by address through a clean lookup and a simple API, so your store charges correctly without spreadsheets or guesswork.
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GET /v1/rate?address=...
curl https://api.salestaxly.com/v1/rate \ -d "address=1600 Amphitheatre Pkwy, CA" { "combined_rate": 0.0925, "state": 0.06, "county": 0.0025, "city": 0.01, "district": 0.02 }
This September
Third quarter close and holiday planning. The third quarter ends this month, and the busiest selling season is right behind it. Settle any open sales tax questions now so they do not collide with your fourth quarter volume.
Read the complete guideRooftop accurateSimple APIAll US statesKept up to date
The problem
US sales tax is a moving target
Rates in the United States change by state, county, city, and special district, and they change often. A hardcoded rate or a stale spreadsheet quietly overcharges some customers and undercharges others, and both create problems.
SalesTaxly gives you the correct combined rate for a specific address, through a friendly lookup for one off checks and a clean API for your checkout, so the number is right when it matters.
- Charge accurate US sales tax at checkout
- Replace fragile spreadsheets with a live source
- Clean up historical orders with bulk lookups
- Show a defensible breakdown on every rate
Features
Built for sales tax rates
SalesTaxly stays focused and does this one job extremely well.
Rate by full address
Enter an address and get the combined state, county, city, and district rate that applies to that exact location.
Simple developer API
A clean, well documented endpoint returns a rate from an address or a postal code, ready for your checkout or invoice.
All states covered
Coverage spans every United States jurisdiction that levies a sales tax, kept current as rates change.
Bulk lookups
Upload a list of addresses and get rates back in a single file, ideal for cleaning up historical orders.
Breakdown you can show
Every result shows the component rates, so you can display and defend the total with confidence.
Clear documentation
Straightforward docs and examples get you from sign up to a working call in minutes.
How it works
Set up in minutes
Three steps from sign up to real value.
1
Get your key
Sign up and grab an API key, or use the web lookup for one off checks.
2
Send an address
Pass an address or postal code and receive the combined rate and its breakdown.
3
Charge correctly
Apply the right rate at checkout and keep clean records for every order.
Pricing
Simple, honest pricing
Start small and grow when you are ready. No ads, no reselling your data, no surprises.
StoreMost popular
$19 per month
10000 API callsBulk lookupsPostal and full addressEmail support
Choose Store
Scale
$49 per month
50000 API callsPriority endpointDownloadable resultsPriority support
Choose Scale
Every plan includes email support and a 14 day money back guarantee.
Built and maintained by
Julien Jimenez
SalesTaxly is the small utility I wish existed the first time a US tax rate changed under me. Send an address, get the right rate, move on.
RecommendedChoose Store
Store, $19
For an active online store. 10000 API calls, Bulk lookups, Postal and full address.
FAQ
Questions, answered
How accurate are the rates?
SalesTaxly returns the combined rate for a specific address, taking state, county, city, and special district rates into account, and the data is kept current as rates change.
Do you cover every state?
Coverage spans every United States jurisdiction that levies a sales tax. Each result includes the component rates that make up the total.
Can I use it in my checkout?
Yes. The API is designed to be called from a checkout or invoice flow, returning a rate from an address or postal code.
Can I process a list of addresses?
Yes. Bulk lookups let you upload many addresses and get rates back in a single file.
Is this tax advice?
No. SalesTaxly provides rate data as a tool. It does not replace advice from a qualified tax professional about your specific obligations.
Can I try the API first?
Yes. You can make live calls on the entry plan and see real results before scaling up.
Get the SalesTaxly playbook
Practical guides on sales tax rates, straight to your inbox as we publish them. No spam, unsubscribe any time.
Charge the right US sales tax, every time
US sales tax rates and lookup for online stores. Start today and see the difference in your first week.
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