MCP For Claude Marketplace
Simples Nacional Calculator

Simples Nacional Calculator MCP Connector for Claude

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Calculate effective tax rates, Fator R eligibility, and monthly DAS amounts for the Brazilian Simples Nacional regime.

4 tools Official Updated Jun 28, 2026 Official Vinkius Partner
More Details Connect to Claude

This MCP server provides a precise calculation engine for the Brazilian Simples Nacional taxation system. It allows AI agents to determine complex tax variables by accessing tools like get_bracket_parameters, calculate_effective_rate, evaluate_factor_r, and compute_monthly_tax_amount. The server handles progressive revenue tiers across Annexes I through V, calculating the dynamic effective rate based on accumulated revenue (RBT12) and fixed deductions. It also evaluates Fator R eligibility by comparing payroll expenses to gross revenue, enabling accurate estimation of monthly tax liabilities (DAS).

brazilsimples-nacionaltax-calculatordasfator-r

4 tools expose this connector's capabilities to your AI agent.

calculate_effective_rate

Calculate the dynamic effective tax rate

compute_monthly_tax_amount

Calculate the final tax amount due

evaluate_factor_r

Check eligibility for Annex III via Fator R

get_bracket_parameters

Retrieve taxation constants based on activity and revenue

See how to talk to your AI agent using Simples Nacional Calculator.

Calculate the effective tax rate for a company with 200,000 BRL accumulated revenue in Annex I, using a nominal rate of 4% and deduction of 0.

The effective tax rate is 4.0%.

Check if a company with 100,000 BRL revenue and 30,000 BRL payroll qualifies for Fator R.

The company is eligible for the lower taxation tier (Annex III) because the payroll-to-revenue ratio is 30%.

How much tax will I pay this month if my revenue is 5,000 BRL and my effective rate is 6%?

The total tax due (DAS) for this month is 300.00 BRL.

You can use the `get_bracket_parameters` tool. Provide your accumulated revenue from the last 12 months and the specific Annex type (e.g., Annex I for commerce) to retrieve the nominal rate and deduction amount.

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