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Sales Tax Calculation API
An accurate sales tax engine that grows with your business
Ziptax delivers real-time sales tax rates for every U.S. jurisdiction and select international markets via a developer-friendly API.
Start free with 1,000 calls each month, and scale with affordable pricing at every stage of growth.
Start calculating sales tax today for free
What you get with Ziptax
Real-time sales tax calculations
Ziptax calculates rates at the delivery address, rather than the postal code, so that every local, county, and district tax is calculated correctly. That precision helps brands stay compliant in highly complex markets and prevents costly undercharges or over-collection.
Lightweight, reliable, and versatile API
The Ziptax API responds in milliseconds and delivers consistent uptime, so your checkout process never stalls. Some tax solutions may also try to lock users into a specific payment platform like Stripe or force teams to rely on pre-built integrations.
With Ziptax, everything is handled through an API that can connect with unique workflows and specialized software.
Affordable and scalable pricing options
Many providers tie costs to transaction volume, driving up pricing as sales grow. Some solutions even pool API costs and transaction-based pricing together, meaning that sales calculations through an integrated marketplace reduce the number of API calls available.
Ziptax keeps pricing simple and transparent with flat rates for API usage that scale based on the number of calls.
Expert support when you need it
Ziptax is designed specifically for developers who need to support finance operations with accurate sales tax rates.
At Ziptax, support and documentation aren’t outsourced; they come straight from the experts who built the product. Our product and engineering teams provide direct, informed assistance to ensure every question is resolved quickly and completely. While other providers rely on impersonal ticket systems and detached support tiers, Ziptax gives you a direct line to the people who know the API best.
Build smarter. Scale faster. Pay less.
Accurate calculations without breaking the bank
Sales tax shouldn’t eat into your margins. Many tax engines base fees on sales or charge high rates for each transaction or API call.
Ziptax offers API solutions with higher volumes and lower costs than competitors while still providing address-level accuracy for every calculation.
Monthly volume | Stripe Tax | TaxJar | Ziptax |
|---|---|---|---|
1,000 calls | $90/month | Up to $349/month | FREE |
5,000 calls | $430/month | Up to $649/month | $69/month |
25,000 calls | $1,000/month | Up to $1,099/month | $139/month |
100,000 calls | $1,500/month | Up to $2,199/month | $349/month |
250,000 calls | Requires Enterprise Plan Upgrade | Up to $3,999/month | $679/month |
*Order volume included in TaxJar’s Professional Plan is calculated as the combined total of imported transactions (1 order per transaction imported) and API calls (at 1/10th of an order per call).
Get started with Ziptax
Sales tax compliance doesn’t need to be expensive or complex. Start with 1,000 free calls today and see how simple accurate tax calculation can be.