IBS: What the Tax on Goods and Services Is and How It Replaces ICMS and ISS
Understand what IBS is, how it replaces ICMS and ISS, the destination principle in practice, and how tax credits work for companies.
Executive Summary
IBS (Tax on Goods and Services) is the subnational tax that replaces ICMS and ISS, consolidating taxation on the circulation of goods and services into a single tax that applies the destination principle — the tax is collected in the state/municipality of consumption, not of production. For lawyers and accountants, IBS represents the largest change to the federative tax structure since the 1988 Federal Constitution. This guide explains what IBS is, how it replaces ICMS and ISS, how crediting works, and presents the example of a SaaS company that bills clients across multiple states.
What Is IBS?
IBS — the Tax on Goods and Services — is a non-cumulative tax jointly administered by states, the Federal District, and municipalities, which replaces ICMS (state-level) and ISS (municipal-level). Unlike the current ICMS, which is charged in the state of origin of the transaction, IBS follows the destination principle: it is levied in the state/municipality where the good is consumed or the service is provided.
Core Features of IBS
IBS is the instrument that effectively unifies consumption taxation in Brazil, eliminating the fragmentation between state and municipal taxes that has always existed.
Destination Principle vs Origin Principle
Current System: ICMS Under the Origin Principle
The current ICMS follows the origin principle — the tax is collected in the state where the goods are produced, not where they are consumed. This produces problematic consequences:
Example: A factory in São Paulo selling to a consumer in Maranhão
- Interstate transaction: ICMS at 7% or 4% depending on destination (origin SP → destination MA)
- The state of origin (SP) collects interstate ICMS
- The state of destination (MA) does not collect ICMS on entry — only a share of the export fund
Result: the producing state receives the tax, even though the final consumer is in another state. This creates an incentive for states to offer tax breaks to attract factories — the “fiscal war” that generated thousands of disputes at CARF and the STF.
New System: IBS Under the Destination Principle
With IBS following the destination principle:
- The tax is collected in the state/municipality where the final consumer is located
- States that consume more than they produce receive more tax
- Exporting states need a compensation mechanism
Example: The same transaction under the IBS system
- A manufacturer in SP sells to a consumer in MA
- IBS = assessed under national rules and allocated to the entities at the place of consumption, subject to the transition rules
- The consumer in MA pays a tax that funds services in MA
How IBS Replaces ICMS and ISS
Replacing ICMS
ICMS — the Tax on Transactions Relating to the Circulation of Goods — is replaced by IBS for transactions involving goods. The replacement:
- Eliminates the fiscal war based on ICMS incentives
- Unifies the crediting rules (today each state has different rules)
- Applies the destination principle to all transactions, including internal ones
Internal transactions: states today have different rules for internal ICMS (exemptions, tax-base reductions, incentives). With IBS, these transactions will be governed by national rules, reducing complexity.
Replacing ISS
ISS — the Tax on Services — is replaced by IBS for transactions involving services. The replacement:
- Eliminates the variation in rates across 5,500+ municipalities
- Unifies the rules for classifying services (today each municipality interprets the constitutional list of services differently)
- Solves the service-location problem for companies that provide services across multiple municipalities
Practical Example: A SaaS Company Billing Clients Across Multiple States
Let’s consider a software-as-a-service (SaaS) company with an office in São Paulo, providing ERP services to clients in São Paulo, Rio de Janeiro, Minas Gerais, and Amazonas.
Company Data
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Monthly revenue: R$ 500,000
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Clients by state:
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São Paulo: R$ 250,000 (50%)
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Rio de Janeiro: R$ 120,000 (24%)
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Minas Gerais: R$ 80,000 (16%)
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Amazonas: R$ 50,000 (10%)
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Operating costs (inputs): R$ 180,000
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Value added: R$ 320,000
Under the Current System (ISS + hypothetical ICMS for software)
ISS in São Paulo (2.5%): R$ 250,000 × 2.5% = R$ 6,250 ISS in Rio de Janeiro (3%): R$ 120,000 × 3% = R$ 3,600 ISS in Minas Gerais (2.5%): R$ 80,000 × 2.5% = R$ 2,000 ISS in Amazonas (3%): R$ 50,000 × 3% = R$ 1,500
Total ISS: R$ 13,350
Complexity: the company has to register in 4 municipalities, understand each one’s rules, file different returns, and deal with possible disputes over service classification.
Under the New System (IBS)
IBS on value added: R$ 320,000 × an illustrative reference rate of 8% = R$ 25,600
IBS is split among the destination states according to each state’s revenue:
- São Paulo: R$ 320,000 × 50% = R$ 160,000 × 8% = R$ 12,800
- Rio de Janeiro: R$ 320,000 × 24% = R$ 76,800 × 8% = R$ 6,144
- Minas Gerais: R$ 320,000 × 16% = R$ 51,200 × 8% = R$ 4,096
- Amazonas: R$ 320,000 × 10% = R$ 32,000 × 8% = R$ 2,560
Total IBS: R$ 25,600 (same amount, but a different distribution)
Advantages of the new system:
- A single national return, not one per municipality
- Automatic split payment — credits recorded at the moment of each transaction
- Uniform national rules — no variation in interpretation between municipalities
In practice, the effective rate and the distribution of IBS depend on the stage of the transition and the applicable regulations.
The IBS Crediting Mechanism
How It Works
Similar to CBS, IBS allows full crediting of amounts paid on input purchases. The credit is automatically recorded in the split payment system.
Example: A wholesaler selling to a retailer
- The wholesaler buys products from the manufacturer for R$ 100,000 + IBS
- IBS paid on the purchase = R$ 100,000 × 8% = R$ 8,000 → credited automatically
- The wholesaler sells to the retailer for R$ 150,000 + IBS
- IBS on the sale = R$ 150,000 × 8% = R$ 12,000
- IBS due = R$ 12,000 - R$ 8,000 (credit) = R$ 4,000
Difference from the Current ICMS
Under the current ICMS, crediting is restricted by:
- Constitutional exceptions (art. 155, § 2, XII)
- The special tax-substitution regime
- Interstate agreements and protocols that limit crediting
IBS eliminates these restrictions — full crediting, with no exceptions.
IBS vs ICMS + ISS: Detailed Comparison
IBS Governance: States + Municipalities + the Union
Shared Administration Model
IBS is not an exclusively federal, state, or municipal tax — it is jointly administered. The governance structure includes:
- IBS Management Committee (CG-IBS): responsible for the central administration of the tax, operational coordination, and distribution under the supplementary law
- States: administer the collection and oversight of IBS within their territory
- Municipalities: participate in distributing the proceeds of collection according to the destination principle
- Tax administrations: act in a coordinated way across systems and applicable oversight
Distribution of Revenue
IBS revenue is distributed among the destination states and municipalities:
- State portion: allocated to the state where the good/service is consumed
- Municipal portion: allocated to the municipality of consumption (replaces municipal ISS)
States with greater consumption receive a larger share, regardless of where the goods were produced.
Open Legal Questions
Compensation for Exporting States
States that produce more than they consume (such as São Paulo and Minas Gerais) will receive less IBS under the new system because the tax goes to the destination state. EC 132 provides for a compensation mechanism, but the detailed regulations are still being defined.
Legal risk: states that will lose revenue may file an ADI (direct action of unconstitutionality) challenging the compensation mechanism, arguing a violation of the federative pact.
Input Credit on Labor Services
Using credits requires reading the specific regulations for each transaction, especially where there are expenses with a strong labor component.
Treatment of Real Estate Transactions
Real estate developments have specific treatment under the current ICMS, with tax substitution and differentiated crediting. IBS will have its own rules for the construction sector.
IBS Ancillary Obligations
Who Must File
All legal entities subject to IBS:
- Companies with an establishment in national territory
- Service providers (replacing ISS)
- Merchants of goods (replacing ICMS)
Filing Systems
IBS will be operated through an integrated filing system, with information shared between states and municipalities. The requirement to break down data by state/municipality of destination will demand more robust tax systems.
Want to understand how IBS specifically affects your company’s operations across different states? On /napratica VMAHUB publishes practical analyses to help companies navigate the fiscal transition. For a personalized review of your case, talk to our team: [email protected]
Read also:
- The Difference Between CBS and IBS
- CBS: What It Is and How It Replaces PIS/Cofins
- Tax Reform and Federalism
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