Introduction
The Guatemalan Superintendencia de Administración Tributaria (SAT) enforces a mandatory real-time electronic invoicing system known as Factura Electrónica en Línea (FEL). For international businesses, particularly in SaaS, data accuracy is critical. Non-compliance—failing to capture a valid Número de Identificación Tributaria (NIT)—means you literally cannot issue a legal invoice. This prevents you from collecting payment from compliant local businesses. Conversely, accurate ID validation ensures instantaneous invoice authorization, protecting your profit margins and ensuring seamless cash flow. This expert guide clarifies the Guatemalan TIN system, ensuring your onboarding is built for financial success.
