If your employer has a payroll giving scheme, you can donate to York from your pre-tax salary. This is called Give As You Earn or GAYE.
With GAYE, the University gets your net gift plus the tax you would have paid on it. For 20% taxpayers, this means your gift is worth 25% more than it cost you.
For higher rate taxpayers, your gift can increase in value by as much as 81%.