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The Simples Nacional calculator helps small and micro Brazilian businesses determine their unified monthly tax payment (DAS — Documento de Arrecadação do Simples Nacional) under this simplified tax regime. Simples Nacional is a special government regime that replaces up to eight separate taxes — IRPJ, CSLL, PIS, COFINS, IPI, ICMS, ISS, and CPP (employer INSS) — with a single monthly payment calculated as a percentage of gross revenue. Eligibility requires annual gross revenue up to R$4.8 million. Microempresas (ME) have revenue up to R$360,000 and Empresas de Pequeno Porte (EPP) have revenue up to R$4.8 million. The applicable tax rate depends on the business activity and is organised into six Anexos. Anexo I covers commerce (retail/wholesale), Anexo II covers industry and manufacturing, Anexo III covers services with 28% factor r, Anexo IV covers construction and cleaning services, Anexo V covers most professional services, and Anexo VI covers special professional services with higher rates. Within each Anexo, there are six revenue bands, and the effective tax rate increases from approximately 4% at the lowest band to 19–33% at the highest band. The calculation uses an 'effective rate' formula that involves the progressive tax amount minus a deductible (parcela a deduzir) divided by the accumulated 12-month revenue (RBT12). Simples Nacional significantly reduces compliance burden for small businesses — instead of filing and paying eight separate monthly taxes, they file a single PGDAS-D declaration and pay one DAS.
Effective Rate = (RBT12 × Nominal Rate - Deduction Amount) / RBT12; DAS = Monthly Revenue × Effective Rate; RBT12 = Sum of last 12 months gross revenue; Each Anexo has its own table of rates and deductions
- 1Calculate RBT12: sum of gross revenue for the previous 12 calendar months.
- 2Identify the business activity and its applicable Simples Anexo (I through VI).
- 3Find the revenue band in the Anexo table that corresponds to the RBT12.
- 4Apply the effective rate formula: (RBT12 × band rate - deduction) / RBT12.
- 5Multiply the resulting effective rate by the current month's gross revenue to get the DAS amount.
- 6Complete the PGDAS-D declaration monthly in the Receita Federal portal to generate the DAS.
- 7Pay the DAS by the 20th of the following month.
Lowest rate for smallest businesses
At R$200K annual revenue the effective rate is 4%. Monthly DAS is a flat R$800 covering all 8 taxes. This is the simplest scenario — often the rate is very close to 4%.
Effective rate formula reduces the nominal rate
The deduction amount (parcela a deduzir) reduces the effective rate below the nominal rate. At R$2M annual revenue the effective rate is 9.575% and monthly DAS is R$17,235.
Factor r determines whether Anexo III or V applies
Services in Anexo III use Factor r (payroll/revenue ratio) to determine eligibility. Above 28%, the lower Anexo III rates apply. Below 28%, the same revenue is taxed under the higher Anexo V table.
MEI is a separate sub-regime below Simples
MEI (revenue up to R$81,000/year) pays a flat DAS of approximately R$70.60 for commerce or services. No PGDAS-D is needed — MEI uses a simplified system.
Calculating the monthly DAS payment for a small retail or services business., representing an important application area for the Simples Nacional Calc in professional and analytical contexts where accurate simples nacional calculations directly support informed decision-making, strategic planning, and performance optimization
Comparing total tax burden under Simples Nacional vs Lucro Presumido to choose the optimal regime., representing an important application area for the Simples Nacional Calc in professional and analytical contexts where accurate simples nacional calculations directly support informed decision-making, strategic planning, and performance optimization
Estimating the Factor r ratio to determine whether Anexo III or Anexo V applies., representing an important application area for the Simples Nacional Calc in professional and analytical contexts where accurate simples nacional calculations directly support informed decision-making, strategic planning, and performance optimization
Planning revenue growth to anticipate when the RBT12 will cross into a higher Simples band., representing an important application area for the Simples Nacional Calc in professional and analytical contexts where accurate simples nacional calculations directly support informed decision-making, strategic planning, and performance optimization
Modelling the tax cost for a new product line or service that falls under a different Simples Anexo., representing an important application area for the Simples Nacional Calc in professional and analytical contexts where accurate simples nacional calculations directly support informed decision-making, strategic planning, and performance optimization
Sublimite for ICMS/ISS
In the Simples Nacional Calc, this scenario requires additional caution when interpreting simples nacional results. The standard formula may not fully account for all factors present in this edge case, and supplementary analysis or expert consultation may be warranted. Professional best practice involves documenting assumptions, running sensitivity analyses, and cross-referencing results with alternative methods when simples nacional calculations fall into non-standard territory.
Simples exclusion for prohibited activities
In the Simples Nacional Calc, this scenario requires additional caution when interpreting simples nacional results. The standard formula may not fully account for all factors present in this edge case, and supplementary analysis or expert consultation may be warranted. Professional best practice involves documenting assumptions, running sensitivity analyses, and cross-referencing results with alternative methods when simples nacional calculations fall into non-standard territory.
Revenue split between Anexos
In the Simples Nacional Calc, this scenario requires additional caution when interpreting simples nacional results. The standard formula may not fully account for all factors present in this edge case, and supplementary analysis or expert consultation may be warranted. Professional best practice involves documenting assumptions, running sensitivity analyses, and cross-referencing results with alternative methods when simples nacional calculations fall into non-standard territory.
Retroactive exclusion
In the Simples Nacional Calc, this scenario requires additional caution when interpreting simples nacional results. The standard formula may not fully account for all factors present in this edge case, and supplementary analysis or expert consultation may be warranted. Professional best practice involves documenting assumptions, running sensitivity analyses, and cross-referencing results with alternative methods when simples nacional calculations fall into non-standard territory.
| Revenue Band (RBT12) | Nominal Rate | Deduction | Approx. Effective Rate at Band Start |
|---|---|---|---|
| Up to R$180,000 | 4.00% | — | 4.00% |
| R$180,001 – R$360,000 | 7.30% | R$5,940 | 4.00% – 5.74% |
| R$360,001 – R$720,000 | 9.50% | R$13,860 | 5.82% – 7.57% |
| R$720,001 – R$1,800,000 | 10.70% | R$22,500 | 9.36% – 10.70% |
| R$1,800,001 – R$3,600,000 | 14.30% | R$87,300 | 9.88% – 12.87% |
| R$3,600,001 – R$4,800,000 | 19.00% | R$378,000 | 11.12% – 19.00% |
Who is eligible for Simples Nacional?
Companies with annual gross revenue up to R$4.8 million, not in prohibited activities, with no prohibited partners, and properly registered. Certain professional services are excluded from Simples. This is particularly important in the context of simples nacional calculator calculations, where accuracy directly impacts decision-making. Professionals across multiple industries rely on precise simples nacional calculator computations to validate assumptions, optimize processes, and ensure compliance with applicable standards. Understanding the underlying methodology helps users interpret results correctly and identify when additional analysis may be warranted.
What is RBT12?
RBT12 is the sum of gross revenue for the 12 months preceding the current calculation month. It determines which revenue band applies and is used in the effective rate formula. This is particularly important in the context of simples nacional calculator calculations, where accuracy directly impacts decision-making. Professionals across multiple industries rely on precise simples nacional calculator computations to validate assumptions, optimize processes, and ensure compliance with applicable standards. Understanding the underlying methodology helps users interpret results correctly and identify when additional analysis may be warranted.
Does Simples Nacional replace FGTS?
No. Simples Nacional does not include FGTS. Employers must still deposit 8% FGTS on employee salaries separately through Caixa Econômica Federal. This is particularly important in the context of simples nacional calculator calculations, where accuracy directly impacts decision-making. Professionals across multiple industries rely on precise simples nacional calculator computations to validate assumptions, optimize processes, and ensure compliance with applicable standards. Understanding the underlying methodology helps users interpret results correctly and identify when additional analysis may be warranted.
What is Factor r and why does it matter?
Factor r is the ratio of payroll mass (folha de salários + encargos) to RBT12. For Anexo III services, a Factor r of 28% or higher means Anexo III rates apply; below 28%, the higher Anexo V rates apply. This is particularly important in the context of simples nacional calculator calculations, where accuracy directly impacts decision-making. Professionals across multiple industries rely on precise simples nacional calculator computations to validate assumptions, optimize processes, and ensure compliance with applicable standards. Understanding the underlying methodology helps users interpret results correctly and identify when additional analysis may be warranted.
Can Simples Nacional companies take PIS/COFINS credits?
No. Companies in Simples Nacional cannot take PIS/COFINS input credits, as these taxes are embedded in the DAS at a lower unified rate. The credit system is only available under Lucro Real. This is particularly important in the context of simples nacional calculator calculations, where accuracy directly impacts decision-making. Professionals across multiple industries rely on precise simples nacional calculator computations to validate assumptions, optimize processes, and ensure compliance with applicable standards. Understanding the underlying methodology helps users interpret results correctly and identify when additional analysis may be warranted.
When is the DAS due?
The DAS must be paid by the 20th of the following month. The PGDAS-D declaration must be filed and the DAS generated before this deadline. This is particularly important in the context of simples nacional calculator calculations, where accuracy directly impacts decision-making. Professionals across multiple industries rely on precise simples nacional calculator computations to validate assumptions, optimize processes, and ensure compliance with applicable standards. Understanding the underlying methodology helps users interpret results correctly and identify when additional analysis may be warranted.
What happens if revenue exceeds R$4.8 million?
If cumulative 12-month revenue exceeds R$4.8M, the company is excluded from Simples from January of the following year and must choose Lucro Presumido or Lucro Real. This is particularly important in the context of simples nacional calculator calculations, where accuracy directly impacts decision-making. Professionals across multiple industries rely on precise simples nacional calculator computations to validate assumptions, optimize processes, and ensure compliance with applicable standards. Understanding the underlying methodology helps users interpret results correctly and identify when additional analysis may be warranted.
Is ICMS and ISS included in the DAS?
Yes for most activities. However, Simples Nacional companies may have ICMS collected separately (ICMS por substituição tributária) on specific goods, which is paid outside the DAS. This is particularly important in the context of simples nacional calculator calculations, where accuracy directly impacts decision-making. Professionals across multiple industries rely on precise simples nacional calculator computations to validate assumptions, optimize processes, and ensure compliance with applicable standards. Understanding the underlying methodology helps users interpret results correctly and identify when additional analysis may be warranted.
Pro Tips
If your services company is close to the 28% Factor r threshold, consider whether formally hiring employees and increasing the payroll mass makes financial sense. Moving from Anexo V to Anexo III can reduce the effective Simples rate by 2–5%, potentially saving more than the additional payroll cost.
Visste du?
Simples Nacional was created by Complementary Law 123/2006 and transformed Brazilian small business taxation overnight. Before Simples, a small shop might file 8 separate monthly tax returns. Simples consolidated this into one, and today over 21 million businesses across Brazil use the regime — making it one of the most widely used tax simplification programs in the world. MEI, a sub-regime below Simples, alone has over 14 million registered micro-entrepreneurs.