What is the 183-day rule?

The 183-day rule is the most common test for tax residency worldwide. If you spend 183 days or more in a country during a fiscal year, you may become a tax resident and owe taxes on your worldwide income.

Is the tax residency calculator free?

Yes, 100% free. No signup, no credit card, no hidden fees. All features are available immediately.

Absolutely. All data is stored locally in your browser using localStorage. Nothing is sent to our servers.

What is the USA Substantial Presence Test?

The USA uses a 3-year weighted formula: (Days current year × 1) + (Days previous year × 1/3) + (Days 2 years ago × 1/6). You meet the SPT if you were present at least 31 days in the current year AND the weighted total is ≥ 183 days.

Tax Residency Calculator Tool – 183-Day Rule Check

Tax Residency Calculator

100% Private • All data stays on your device • No signup required

Privacy First: All calculations happen in your browser using localStorage. We never store, log, or transmit your trip data to any server. Your data never leaves your device. Click “Clear All Data” in settings to delete everything at any time.

Need help understanding the 183-day rule?

Learn More About Tax Residency

Tax Residency Calculator Tool – Check Your 183-Day Rule Compliance

Tax Residency Calculator