Founder Equity and Massachusetts Tax: 83(b) Elections, Options and the 4% Surtax
An 83(b) election must be filed within 30 days of the grant and cannot be made late. Massachusetts taxes most income at a flat 5%, with an additional 4% surtax on taxable income above an annually indexed threshold, currently $1,107,750, producing a 9% top rate. The surtax is marginal, applying only to the excess, and
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