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
15 Jul 2026
SaaS

Tax Remittance: How It Works and Why It Matters

Learn how businesses remit sales, payroll, and estimated taxes with IRS-approved methods. Read about automated solutions and the new 1% remittance tax.

Jennifer Dunn
10 Apr 2026
Indirect Tax

South Korea VAT Guide for Digital Services

Your guide to South Korea VAT for digital service providers. Step-by-step tips on registration, filing, invoices, and reverse charge rules.

Jennifer Dunn
10 Apr 2026
Regional Guides

Sales Tax in Norway: Your Guide to VAT Compliance

Navigate sales tax in Norway with our expert guide to VAT. Learn about rates, registration (VOEC vs. VAT Register), and compliance for your global business. Simplify your tax obligations.

Jennifer Dunn
10 Apr 2026
Regional Guides

Is SaaS Taxable in Colorado? A Simple Breakdown

Is SaaS taxable in Colorado? Learn how state and home rule city taxes work — and how to stay compliant.

Jennifer Dunn
10 Apr 2026
Regional Guides

Peppol E-Invoicing Network Compliance Guide

A practical guide to the Peppol E-Invoicing Network covering Peppol BIS standards, interoperability, global adoption, and implementation options.

Jennifer Dunn
03 Apr 2026
Indirect Tax

VAT vs Sales Tax: How They Work + Examples

Learn the key differences between sales tax vs VAT, how each works, and what global businesses need to manage compliance across jurisdictions.

Jennifer Dunn
03 Apr 2026
Indirect Tax

A Step-by-Step Guide to E-Invoicing in Europe

Learn how e-invoicing in Europe works, which countries have mandates, what ViDA changes, and how businesses should prepare for compliance.

Jennifer Dunn
03 Apr 2026
Regional Guides

Permanent Establishment Risk: Triggers and How to Avoid

Understand permanent establishment risk: fixed place, dependent agent, service and project PE, plus how to track exposure and reduce tax liabilities.

Jennifer Dunn
28 Mar 2026
Indirect Tax

Input VAT Explained: Rules, Calculation, Refunds

A practical guide to input VAT, VAT refunds, deduction rules, and how businesses calculate VAT payable or VAT credits across global tax systems.

Jennifer Dunn
28 Mar 2026
Indirect Tax

What Is A Resale Certificate? State Tax Rules

Learn what a resale certificate is, how to obtain one from your state Department of Revenue, and how businesses use them for tax-exempt purchases.

Jennifer Dunn
28 Mar 2026
Indirect Tax

Use Tax vs Sales Tax: What You Need to Know Today

Use tax vs sales tax explained: learn when each applies, real examples, and how businesses report and remit taxes across states.

Jennifer Dunn
28 Mar 2026
Indirect Tax
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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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