How to Build Your Own TaxJar
Replace TaxJar with a custom build. Sales Tax Compliance for Modern Commerce
Build Difficulty: 4/5
A few focused days to build a solid replacement
Estimated Timeline
Based on 39 features at Few Days difficulty, expect about 3-5 days with AI-assisted development.
Recommended Tech Stack
Full-stack React framework with API routes and server components
PostgreSQL database, auth, and real-time subscriptions
Utility-first styling for rapid UI development
Key Features to Replicate
Top features across 8 categories. See all 39 features
Compliance Monitoring(10 features)
Support for accelerated payment programs with tax jurisdictions
Support and assistance during tax audits
Receive alerts when approaching sales thresholds or transaction thresholds
Check your economic nexus status against sales thresholds and transaction thresholds
Monitor economic nexus obligations across all jurisdictions in real-time
+5 more in this category
Integration(8 features)
Validate customer addresses for accurate tax calculation based on location
Flexible API access for custom integrations and solutions
Simple and advanced CSV import capabilities for data integration
Import sales data from multiple data sources and platforms
Sandbox environment for testing API integrations before production deployment
+3 more in this category
Customer Support(5 features)
Assigned dedicated customer success manager for account management
Dedicated onboarding specialist to help with implementation and setup
Email support for customer inquiries
Guaranteed response time for support inquiries
Phone support for customer inquiries and urgent issues
Reporting(5 features)
Export detailed sales tax analysis reports in multiple formats
Detailed reporting broken down by individual jurisdiction
Get detailed, up-to-date reports on sales and sales tax collected or due by state and jurisdiction
Export simple XLS format reports for basic reporting needs
Detailed insights into individual transactions and their tax treatment
Compliance Readiness(4 features)
Manage customer tax exemptions and exempt sales
Store and manage customer exemption certificates
Comprehensive catalog of product tax codes for accurate categorization
Help with registering for sales tax permits across multiple states
AI(2 features)
Automatically categorize products for accurate tax classification
Receive AI-powered recommendations for product taxability classifications
Administration(1 features)
Manage multiple team users and their access to the platform
Automation(1 features)
Automatically submit returns and remittance to each jurisdiction, saving time and reducing errors
Cost Calculator
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Build It Yourself
Total Cost Comparison
DIY hosting estimate based on Vercel + Supabase free/pro tiers (~$20/mo). Build time estimated from 39 features at easy complexity.