Free Business & Tax Calculators

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Tax analysis

Power Consumption

Why we built BusinessCalcs

BusinessCalcs was created to solve a specific problem: most online financial calculators are either too complicated, hidden behind paywalls, or cluttered with intrusive pop-ups that slow down your workflow. We believe that critical planning tools should be fast, transparent, and instantly accessible.

Whether you are modeling a startup's cash runway, planning an EMI structure for a home loan, or attempting to estimate complex direct and indirect tax burdens across different regimes, you need exact math without the friction. Our calculator suite is designed to function strictly in your browser or via secure, momentary edge functions, ensuring that your financial data remains private and is never stored or tracked.

Use these tools as a starting point to frame your decisions. For the exact formulas, methodologies, and assumptions driving each model, browse our dedicated guides. Always consult a certified financial or legal professional before making final commitments based on these estimations.

Latest Guides

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Food Delivery Margin Traps: How Restaurant Pricing Breaks on Aggregators AI API Cost Unit Economics: Model Token Spend Before You Ship the Feature How to Connect BusinessCalcs to Claude Desktop or Another AI Assistant SIP vs FD: How to Choose Between Market Growth and Guaranteed Returns How to Estimate Startup Runway Without Lying to Yourself

Frequently Asked Questions

Quick answers from the sitewide FAQ hub and popular calculator pages.

Sitewide

Which calculator should I start with?

Start with the calculator closest to the decision in front of you. Use Tax Estimator for annual tax comparison, Lifetime Tax Analyst for tax paid so far, Runway Command Center for startup cash planning, Home Loan Calculator for EMI and prepayment questions, and SIP Calculator for long-term investing scenarios.

Sitewide

Are the calculators free to use?

Yes. The public calculators are free to use and do not require sign-up. Some heavier models run through the Cloudflare worker in the background, but the visitor flow is still built around quick access rather than account creation.

Sitewide

Do you store the numbers I enter?

No account is required for the public tools, and BusinessCalcs is built for quick, privacy-conscious use. Some advanced calculators call secure edge functions to return a result, but your inputs are used to calculate the output rather than saved as a personal history.

Tax Estimator

Which year should I choose?

Choose FY 2025-26 for income earned from April 1, 2025 to March 31, 2026. Use FY 2024-25 only for income earned from April 1, 2024 to March 31, 2025.

Runway

When should I use Basic instead of Advanced?

Use Basic for a quick monthly cash-burn estimate. Use Advanced when timing of hires, one-off costs, or future rounds materially changes the runway.

SIP Calculator

What is the difference between SIP and lumpsum investing?

SIP spreads investments over time through regular contributions, while lumpsum invests the full amount at the start.

XIRR Calculator

What is the difference between XIRR and CAGR?

CAGR assumes one starting value and one ending value, while XIRR handles multiple cash flows occurring on different dates.

Sitewide

Can I use these results for final filing or contracts?

Use the calculators for comparison, planning, and decision framing. Before filing taxes, signing a loan, or making a legal or commercial commitment, verify the result against your official records, documents, and the latest applicable rules.

Sitewide

Where can I review formulas and assumptions?

Use the methodology pages, editorial standards, and related guides linked from the homepage and directory. They explain assumptions, simplifications, update handling, and where a calculator should be treated as a planning aid rather than a final authority.

See full FAQ list Read our methodology