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Verified 2026 USCIS, IRS, DMV & Federal compliance rules.
Interactive US Compliance & Tax Estimation Calculators
Accurately calculating federal tax withholding, F-1 STEM OPT unemployment day allowances, USCIS poverty guideline thresholds, and naturalization physical presence days is critical to maintaining immigration compliance. Our interactive US tools integrate statutory IRS tax brackets and USCIS regulatory requirements to deliver instant, actionable simulations.
Key 2026 Statutory & Regulatory Checkpoints:
- Substantial Presence Test calculator with weighted 3-year presence evaluations.
- Form I-864 poverty guideline sponsor eligibility checker for 48 contiguous states, Alaska, and Hawaii.
- STEM OPT 24-month extension and 150-day cumulative unemployment day tracker.
Frequently Asked Questions: Calculators & Tools
F-1 students on initial 12-month post-completion OPT receive 90 days of allowed unemployment. Those approved for the 24-month STEM extension receive an additional 60 days, for a cumulative total of 150 days.