Finance & taxes with direct entry.
Compound interest, loan amortization, ROI, pricing and Brazilian taxes.
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Receipt Generator
Create a payment receipt, fill in the details and export a PDF ready to sign.
Amortization Simulator (SAC/PRICE)
Compare loan schedules and see how much of what you pay is interest.
Financial Calculator in the style of the HP 12C
Online financial calculator with the HP 12C keys: RPN with the stack in view, n, i, PV, PMT and FV, NPV, IRR and dates, with errors explained.
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More tools in this category
Contract analysis
Paste the contract or open the PDF to see which clauses Brazilian law forbids, with the article, and what is missing. Rentals, consumer and service contracts, in your browser.
Brazil DAS-MEI Calculator
Monthly MEI payment in 2026 by activity, plus tracking of the revenue cap.
P&L (DRE) Analyst
Enter the month's figures and see the P&L breakdown: margin, break-even point and where cash is leaking.
Expense Categorizer
Paste a messy bank statement and get the expenses classified and tabulated, ready for your spreadsheet.
Compound Interest Calculator
Calculate compound interest with a monthly contribution, a rate per month or per year, a year by year table and a comparison with simple interest.
ITBI & Closing Costs Calculator
Estimate ITBI, deed and registration costs before buying a property in Brazil.
Index
Every tool in Finance & taxes
The full list for this category, in alphabetical order.
- Amortization Simulator (SAC/PRICE)
- B2B Contract Risk Scan
- Brazil DAS-MEI Calculator
- Business proposal generator
- Compound Interest Calculator
- Confidentiality Agreement (NDA)
- Contract analysis
- Expense Categorizer
- Financial Calculator in the style of the HP 12C
- ITBI & Closing Costs Calculator
- P&L (DRE) Analyst
- Percentage Calculator
- Pricing Calculator
- Real Estate ROI Calculator
- Receipt Generator
- Simples Nacional Calculator
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FAQ
Frequently asked questions
Answers about plans, privacy and using the tools.