When tax becomes simple, everything else accelerates. Zamp pairs best-in-class software with a team of sales tax experts to take compliance off your plate completely.
Done-for-you
Get sales tax off your plate
Most tools hand you software and leave the hard part to you. Zamp is different — it’s a fully managed, done-for-you service that owns the entire sales tax lifecycle so your team doesn’t have to.Registration
Zamp registers your business in every state where you have an obligation — no paperwork on your end.
Rooftop-accurate calculation
Real-time tax down to the exact address, with a full jurisdiction breakdown on every transaction.
Filing & remittance
Returns are prepared, filed, and paid on time, in every jurisdiction — handled for you.
Nexus monitoring
Zamp tracks economic nexus as you grow and tells you exactly where you need to register next.
Why teams switch
The Zamp difference
Accuracy you can trust
Rooftop-level calculations — down to the exact address, not just the ZIP code.
Where these docs fit
This site is the developer home for Zamp. There are two ways to bring Zamp’s tax engine into your product:Build with the API
Calculate tax, post transactions, and access filings directly from your own product. Spin up a trial key and make your first call in minutes.
Get a free trial key →See Zamp in action
Prefer the done-for-you route? See how Zamp automates sales tax end to end for teams like yours.
Book a demo →