How did ship money add to public opposition to William Laud and Charles I?

Ship money was a non-parliamentary tax originally levied on coastal areas for naval defense, which Charles I revived and expanded as a general financial expedient during his 11-year period of personal rule.1

The tax became a primary source of public discontent because it bypassed Parliament, signaling the King's intent to establish it as a permanent, arbitrary form of taxation. As opposition grew, the resistance of the gentry was consolidated by the extended demands for these payments, which were widely viewed as the most hated of the King's levies.12

While William Laud was not the architect of ship money, his close alliance with Charles I and his own aggressive policies—such as enforcing religious uniformity and expanding the power of church courts—created a climate of profound hostility toward the crown. The combined effect of Laud’s religious innovations and the King’s financial overreach alienated those who valued the common law and constitutional governance, ultimately fueling the widespread opposition that led to the English Civil Wars.231