The move changes the rate; the record decides whether it sticks. South Carolina keeps taxing until domicile actually changes — domicile — 'the true test of domicile is the intent of the individual', evaluated against conduct, with no fixed day threshold to hide behind. Below: what follows leavers, and the Florida steps that build the record.
No fixed threshold — facts based
No test
SC1040 + Schedule NR (part-year)
No income tax return
At South Carolina's top marginal rate (5.21%), every $100,000 of taxable income is $5,210 of state tax — an illustration at the top bracket, not an effective-rate calculation. Official rate tables are linked below.