Massachusetts' highest court is expected to rule on whether a proposed "millionaire tax" can go before state voters in November.

The Supreme Judicial Court is poised to issue its decision Monday after weighing the case for several months. The proposed constitutional amendment would impose a surtax of 4 percent on any portion of an individual's annual income that exceeds $1 million. The measure calls for revenues from the tax to be used for transportation and education.

Several business groups sued to stop the proposed surtax from appearing on the ballot, claiming it violates constitutional restrictions on ballot questions.

The Raise Up Massachusetts coalition collected more than 150,000 signatures in support of the measure and estimates it would raise nearly $2 billion in additional taxes annually for the state.