Cross Border & Local Apportionment
Multi-state and international tax allocation tools for businesses and individuals.
Multi-state and international tax allocation tools for businesses and individuals.
Welcome to our Cross Border and Local Apportionment hub. Here you will find tools designed to help with multi-state income sourcing, apportionment factor calculations, foreign tax credits, and other cross-jurisdictional tax allocation needs. Each tool is built on the latest regulations and official guidance.
Calculate your Georgia part-year resident income tax instantly. Free calculator with step-by-step guidance, Schedule 3 walkthrough, and real examples for 2026.
Calculate your 2026 Massachusetts millionaire's tax apportionment in seconds. Enter your income, working days, and residency status. Free calculator updated for the $1,107,750 surtax threshold.
Calculate your New York nonresident allocation percentage instantly. Free tool for remote workers, commuters, and part-year residents. Updated for 2026 tax year.
Calculate your NYC part-year resident income tax allocation instantly. Free calculator with 2025 tax rates, step-by-step examples, and audit prevention tips.
Confused about Ohio municipal tax reciprocity? See how the credit works, which cities offer 100% vs. partial credit, and calculate exactly what you owe. Updated with HB503 status.
Working in Yonkers but living elsewhere? Learn how to claim the 0.5% nonresident tax credit, file Form Y-203, and get your refund. Updated for 2026 with calculator.
Philadelphia Wage Tax vs School Income Tax: 2025 rates are 3.74% for both. But one taxes your paycheck; the other taxes investments, dividends, and capital gains. See who pays which and calculate your exact liability.