What the jock tax is and how duty-day allocation works
The jock tax is the income tax that states levy on athletes for income earned within their borders. When an athlete plays a road game, runs a camp, or makes a paid appearance in another state, a slice of their income is sourced to that state and taxed there — even if they live somewhere with no income tax. The standard method is duty-day allocation: the share of total work days spent in each state determines the share of income that state can tax. This calculator applies that allocation across every state you add, then nets it against a resident-state credit so the same dollar isn't taxed twice.
Why a single-state estimate understates the bill
A planner who only models the home state misses every nonresident dollar — and for a Florida or Texas resident with no home-state tax to credit, those nonresident taxes are pure additional cost. The gap between the naive single-state number and the real multi-state total is exactly what this tool surfaces. To fold jock tax into a full S-Corp, QBI, and quarterly-estimate plan, use the SidelineWealth planner.