Split Payment: What It Is and How Automatic Tax Collection Works Under the Reform
Understand Split Payment: the automatic collection mechanism for CBS and IBS in Brazil's tax reform — who collects, who remits, and the differences between B2B and B2C.
Executive Summary
Split Payment is one of the most innovative — and most challenging — mechanisms in Brazil’s Tax Reform. Essentially, the buyer of a service or good automatically withholds the CBS and IBS portion due and forwards it directly to the tax authority, without it ever passing through the supplier’s cash flow. The goal is to reduce tax evasion and simplify administration. This guide explains how it works in practice, who is affected, and what changes for the financial manager.
What Is Split Payment?
Split Payment is a mechanism whereby, in a commercial transaction, the tax due is automatically separated at the moment of payment and routed directly to the Receita Federal (Federal Revenue Service) — without the supplier having to remit it manually.
In practice:
Goal: Eliminate the “gap” between the moment of sale and the moment of collection — which significantly reduces the chance of evasion.
How It Works Day to Day: B2B vs B2C
B2B (Business to Business) — The Main Model
In B2B, Split Payment operates in full:
- Company A sells to Company B for R$ 50,000
- At the moment of payment, the bank or financial system withholds R$ 5,000 (CBS + IBS)
- Company A receives R$ 45,000 in its account
- The bank remits the R$ 5,000 directly to the Receita Federal
Roles in the operation:
- Supplier (seller): issues the invoice, receives only the net amount, and does not need to calculate or collect CBS+IBS
- Buyer: makes the full payment, but the bank withholds the tax portion
- Bank/intermediary: the agent that performs the withholding and remittance — responsible for correctly segregating the amounts
B2C (Business to Consumer) — Mixed Model
In B2C, Split Payment works differently because the individual consumer has no structure to withhold:
- Company sells to End Consumer for R$ 1,000
- The company collects the CBS + IBS (itemized on the invoice)
- The company collects the CBS + IBS according to its regime (usually monthly)
- There is no automatic withholding — the consumer does not withhold
Alternative under discussion: For large retailers, there may be advance collection via a tax control system — but this is still being regulated.
Who Is Responsible for Collecting and Remitting?
Practical Example: Retailer Buying from a Wholesaler
Scenario: A supermarket chain (Varejo Exemplo Ltda) buys from a wholesaler (Dist. Comercial ABC):
Technical Questions: How Does the Bank Know How Much to Withhold?
This is one of the most frequent questions, and the answer lies in the NF-e systems and banking integration:
- NF-e with CBS/IBS fields: The electronic invoice will have specific fields indicating the CBS and IBS amounts separately
- Integration with SPED: The digital bookkeeping system sends information about transactions to the tax authority
- Communication with the bank: At the moment of payment via PIX, TED, or boleto, the banking system reads the NF-e fields and applies the automatic withholding
- Validation: If the amount paid by the buyer is less than the invoice value + CBS + IBS, the bank does not perform the full withholding — triggering an alert at the tax authority
Challenge: The technological infrastructure for this integration is still under development. Banks and payment processors will have to adapt their systems to recognize and automatically withhold CBS/IBS amounts.
Implications for Cash Flow
For the Supplier (the seller)
Advantage:
- No longer needs a “cash reserve” to pay CBS/IBS at the due date
- The tax money never enters the cash flow — preventing improper use
Disadvantage:
- Receives less money per sale (lower net amount)
- If the company relies on that money for working capital, it may face cash flow problems
For the Buyer (the payer)
Advantage:
- Can use the CBS/IBS credit in the correct proportion
- Does not need to remit manually — the bank does it
Disadvantage:
- Has the work of configuring systems to recognize the withholding
- Must ensure the bank is performing the withholding correctly
Split Payment and Tax Substitution
A point of attention: when there is Tax Substitution (ST), the collection is already made in advance by the substitute taxpayer. How does Split Payment interact with this?
Possible conflict:
- ST already advances the tax — the substitute pays before the transaction to the consumer
- Split Payment at the moment of the B2B transaction may generate “double taxation” if there is no deduction mechanism
- The complementary legislation should clarify how the deduction and offset mechanism will work
How the Financial Manager Should Prepare
- Register in the new system — companies will need specific accreditation for Split Payment
- Review contracts with banks — ensure partner banks have withholding capability
- Adjust cash flows — the amount received per sale will be lower (already net of CBS/IBS)
- Train accounts-payable teams — whoever pays the bills needs to understand the mechanism
- Update the ERP — configure Split Payment fields in the financial and tax modules
Want to understand how the tax reform affects your sector? In /napratica, VMAHUB publishes practical guides for businesses. For a personalized analysis of your case, talk to our team: [email protected]
Read also:
- Split Payment and ERP: How to Adapt Your System
- How to Calculate Split Payment in Cash Flow
- CBS: What It Is and How It Replaces PIS/Cofins
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