- RM registers your business entity — corporation, sole proprietor, partnership
- SAT registers your business tax obligations — NIT, IVA, ISR, FEL
- Every operating merchant needs both — typically RM first, then SAT
- Liberal professionals (lawyers, doctors, accountants) skip RM but still need SAT
Two of the most confused acronyms in Guatemalan business setup: RM (Mercantile Registry) and SAT (Tax Authority). They are separate institutions with different missions, governed by different laws, but every operating business needs both registrations. This page disambiguates them once and for all.
Quick rule: RM = entity registration. SAT = tax registration. RM gives you the Patente de Comercio (business license). SAT gives you the NIT (tax ID). You need both. Liberal professionals skip RM (Art. 9 exclusion) but still need SAT.
Side-by-side comparison
| Aspect | Mercantile Registry (RM) | SAT |
|---|---|---|
| Full name | Registro Mercantil | Superintendencia de Administracion Tributaria |
| Parent ministry | MINECO (Economy) | MINFIN (Finance) |
| Founding law | Code of Commerce (Decree 2-70) | Tax Code (Decreto 6-91) and SAT Law (Decreto 1-98) |
| What it registers | Business entities, partners, capital, books, modifications | Tax obligations, NIT, regime, FEL, customs |
| Documents issued | Patente de Comercio, RM inscription certificate, books authorization | NIT certificate, tax regime certificate, FEL enrollment |
| Annual cycle | Patente renewal Q150 + balance publication for societies | ISR annual return Mar 31 + monthly IVA + payroll |
| Online portal | registromercantil.gob.gt + etramites.registromercantil.gob.gt | portal.sat.gob.gt + Agencia Virtual |
| Free public search | consulta.registromercantil.gob.gt | Limited via /tramites/cui-nit-from-usa/ |
| Contact | 2412-0203 | 1550 |
| Address | 8a Avenida 10-43 Zona 1 | Multiple offices nationwide |
What RM does — entity registration
The Mercantile Registry handles everything related to the existence and structure of business entities:
| RM function | Document or act |
|---|---|
| Register a corporation (S.A.) | Inscription + Patente de Comercio |
| Register a limited liability company (S.R.L.) | Inscription + Patente |
| Register an EIRL | Inscription + Patente |
| Register a sole proprietor (Comerciante Individual) | Inscription + Patente |
| Register a foreign branch | Branch inscription |
| Register a commercial agent or representative | Agent inscription |
| Authorize accounting books | Books authorization act (Art. 372) |
| Register modifications | Capital, partners, address, activity, legal representative |
| Cancel an inscription | Cancellation act |
| Register mercantile mortgages and movable guarantees | Security inscription |
Reference: Code of Commerce (Decree 2-70).
What SAT does — tax administration
SAT handles everything related to tax obligations of registered persons and entities:
| SAT function | Document or act |
|---|---|
| Issue NIT (tax ID) | NIT certificate |
| Enroll in tax regime | Pequeno Contribuyente, ISR Regimen Optativo, General, etc. |
| Enroll in electronic invoicing (FEL) | FEL authorization |
| Register payroll obligations | Patronal registration linked to IGSS |
| Customs and import/export | Aduanas registration, IVA on imports |
| Tax payments and filings | Monthly IVA, monthly retentions, annual ISR |
| Tax audits and adjustments | Audits, fines, fiscal solvency |
| Withholdings agents | Designation as agente de retencion |
Reference: SAT Hub, How to get your NIT, SAT Agencia Virtual setup.
The typical setup sequence
| Order | Step | Where |
|---|---|---|
| 1 | Decide entity type (Comerciante Individual, S.A., S.R.L., EIRL) | Plan |
| 2 | Reserve trade name (if society) | RM e-Tramites |
| 3 | Notary drafts constitutive deed (society) | Notary |
| 4 | Deposit capital in bank (society) | Bank |
| 5 | File RM inscription | RM e-Tramites |
| 6 | RM issues Patente de Comercio | RM |
| 7 | Register NIT at SAT | SAT Agencia Virtual or office |
| 8 | Choose tax regime, enroll in FEL | SAT |
| 9 | Authorize accounting books | RM (Art. 372) |
| 10 | Patente Municipal | Local muni |
| 11 | IGSS employer registration (if 3+ employees) | IGSS |
| 12 | Bomberos and sector permits | CVB, MSPAS, MAGA, etc. |
Steps 5-7 are the RM→SAT handoff. SAT cannot give you a NIT for commercial activity without a corresponding RM inscription (with exceptions for the Art. 9 categories).
When you need only SAT (and skip RM)
Article 9 of the Code of Commerce excludes three categories from “merchant” status. These categories register only at SAT (plus colegio profesional if applicable):
| Category | RM needed? | SAT needed? | Other |
|---|---|---|---|
| Liberal professional (lawyer, doctor, accountant, architect, engineer, etc.) | No | Yes | Colegio profesional |
| Own-farm agricultural producer | No | Yes | None |
| Artisan without store/workshop | No | Yes | None |
| All other commercial activities | Yes | Yes | Various per activity |
If you fall in one of the three Art. 9 categories, you save the RM step but still pay taxes via SAT under your appropriate regime (often Pequeno Contribuyente for low-income, ISR Regimen Optativo for professionals).
Mismatches and cross-checks
RM and SAT share data and cross-check periodically. Mismatches trigger inquiries:
| Mismatch | Likely consequence |
|---|---|
| RM active, SAT inactive NIT | SAT may suspend FEL; banks may block account |
| SAT active, no RM inscription | RM may impose Art. 370 fine (Q100-Q1,000); SAT may flag activity |
| Different fiscal domicile | Both registries flag the inconsistency; renewal may be blocked until reconciled |
| Different legal representative | Power-of-attorney verification fails; contracts may be voidable |
| Different activity description | Tax regime audit, especially around IVA rate by activity |
| Different partners/capital | RM data prevails for entity structure; SAT may request updated information |
When you update one, update the other promptly. Both registries operate online for routine changes.
US diaspora — operating both registries remotely
For US-based owners of Guatemalan businesses:
| Task | Where | Remote feasibility |
|---|---|---|
| Initial RM inscription | RM e-Tramites + notary | Via power of attorney; notary requires apostilled POA |
| Initial NIT at SAT | SAT Agencia Virtual | Mostly online; some cases require in-person via gestor |
| Patente renewal | RM e-Tramites | Fully remote, gestor handles |
| ISR annual return | SAT Agencia Virtual | Fully remote, accountant handles |
| Monthly IVA | SAT Agencia Virtual | Fully remote, accountant handles |
| Balance publication | Diario Oficial + RM | Fully remote, accountant + gestor |
| Modifying RM inscription | RM e-Tramites + notary | Power of attorney required for notarial acts |
See: How to get your NIT from the USA.
Common confusions to clear up
| Confusion | Reality |
|---|---|
| “Patente de Comercio is the same as NIT” | No. Patente is RM; NIT is SAT. Two separate documents. |
| “If I have a NIT, I’m a registered business” | No. NIT is tax ID; RM inscription is business entity registration. Both required for merchants. |
| “RM is the tax authority” | No. RM is the entity registry under MINECO. SAT is the tax authority under MINFIN. |
| “I just register once and I’m done” | No. Each registry has annual cycles — Patente renewal at RM; ISR + IVA + FEL at SAT. |
| “Liberal professionals need RM” | No. Art. 9 excludes them. They register at colegio profesional and SAT only. |
| “Patente de Comercio includes Patente Municipal” | No. Patente de Comercio is national (RM); Patente Municipal is local (muni). Both required for physical operations. |
Cluster mesh
Related resources
- Mercantile Registry Hub — all RM procedures
- SAT Hub — all SAT procedures
- NIT at SAT — tax ID registration
- Patente de Comercio — RM annual business license
- SAT Agencia Virtual — online tax filings
- Incorporate an S.A. — RM entity registration
- Sole Proprietor — simplest RM path
- Get NIT from USA — diaspora-specific SAT process
Sources: Code of Commerce of Guatemala (Decree 2-70), Articles 6, 9, 368-382; Tax Code (Decreto 6-91); SAT Law (Decreto 1-98) — consulted via Congress of the Republic. Portal references: registromercantil.gob.gt, portal.sat.gob.gt. Verified: May 2026.