Announcing our $21M Series A led by a16z. Read more.
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blogs

Sphere's Global Compliance Blog

Find regional guides, tax developments and thought leadership at the intersection of AI and tax here

Building TRAM | The World’s First Tax Review and Assessment Model

Sphere's AI-native tax research system that interprets global indirect tax rules, builds product taxonomies, and automates taxability and rate determinations.

Alex Bowcut
23 Nov 2025
AI

Sphere Raises $21M Series A Led by Andreessen Horowitz

Sphere secured a $21M Series A led by a16z to build the first AI-native cross-border compliance engine, meeting rising demand for scalable global tax solutions.

Nick Rudder
18 Nov 2025
Announcements

What Is a Tax Exempt Certificate?

What is a tax exempt certificate? Learn how SaaS companies use them, who qualifies, and how to stay compliant across U.S. states and beyond.

Jennifer Dunn
10 Apr 2026
Indirect Tax

What Is a VAT/GST ID? Global Tax Guide for SaaS

Do you need a VAT or GST ID for global SaaS sales? This guide covers registration, verification, and compliance tips every CFO should know.

Jennifer Dunn
30 Jul 2026
SaaS

How is VAT Calculated? Step-by-Step Guide

Learn how VAT is calculated step by step: formulas, examples, and how to account for input/output VAT. Perfect for SaaS teams and global sellers.

Jennifer Dunn
10 Apr 2026
Indirect Tax

Can I Verify a Tax ID Number? | Full Guide

Learn how to verify tax ID numbers (EIN, SSN, ITIN, VAT) for compliance, fraud prevention, and audits. Real-time tools and global methods included.

Jennifer Dunn
10 Apr 2026
Indirect Tax

Taiwan Sales Tax: Complete VAT Guide for SaaS

How does Taiwan sales tax apply to U.S. SaaS? We cover the 5% rate, key exemptions, e-invoicing rules, and what automated compliance solutions you can choose.

Jennifer Dunn
10 Apr 2026
Regional Guides

Is SaaS Taxable in New York? Yes—Here’s Why

New York treats most SaaS subscriptions as taxable software. Learn about NY sales tax law for SaaS, including when to charge tax, how to register & file returns, and ways to stay compliant.

Jennifer Dunn
10 Apr 2026
Regional Guides

What Is Import Tax & How Is It Calculated?

What is import tax? Learn how tariffs and customs duties affect goods, costs, and compliance. A must-read for SaaS, tech, and global businesses.

Jennifer Dunn
10 Apr 2026
Indirect Tax

E-Invoicing Regulations: What to Know

E-invoicing mandates are accelerating worldwide—and U.S.-based SaaS companies can’t afford to ignore them. Learn key compliance requirements, global rollout timelines, and how automation helps you stay ahead of penalties and delays.

Ken Boyd
10 Apr 2026
Regional Guides

Reverse Charge VAT Explained: What It Is & How It Works

Learn how reverse charge VAT helps shift tax reporting to the buyer, cut down on foreign registrations, and simplify global tax compliance.

Jennifer Dunn
10 Apr 2026
Indirect Tax

Vertex vs Avalara: Which Tax Tool Fits You Best?

Vertex and Avalara are the key legacy players in the sales tax compliance space, but with that legacy comes high prices, technical debt, and outmoded ways of doing business.

Jennifer Dunn
10 Apr 2026
Tools

Payroll Compliance Checklist for Accurate Payroll

This payroll compliance checklist walks through pre-payroll, payroll processing, and post-payroll steps to help teams stay compliant and audit-ready.

Nathan Collier
10 Apr 2026
Indirect Tax

VAT in Canada: How GST, HST, and PST Really Work

Wondering how VAT works in Canada? Learn how GST, HST, PST, and QST apply to SaaS and digital sales, with province-by-province tax rules.

Ken Boyd
10 Apr 2026
Regional Guides

South Africa VAT Rules: Registration & Updates

South Africa VAT rules for SaaS companies: registration, rates, B2B vs B2C, reverse charge, and recent updates. All you need to know.

Jennifer Dunn
10 Apr 2026
Regional Guides
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End-to-end compliance automation for sales tax, VAT, and GST. 100+ regions. One platform. Built by 50 people who believe the compliance cost of every transaction should be zero.

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